Release 1.0.100

Export std error type so no_std data formats don't need a "std" feature

.github/ISSUE_TEMPLATE/1-problem.md

@@ -0,0 +1,7 @@
+---
+name: Problem
+about: Something does not seem right
+
+---
+
+

.github/ISSUE_TEMPLATE/2-suggestion.md

@@ -0,0 +1,7 @@
+---
+name: Suggestion
+about: Share how Serde could support your use case better
+
+---
+
+

.github/ISSUE_TEMPLATE/3-documentation.md

@@ -0,0 +1,7 @@
+---
+name: Documentation
+about: Certainly there is room for improvement
+
+---
+
+

.github/ISSUE_TEMPLATE/4-discussion.md

@@ -0,0 +1,7 @@
+---
+name: Help or discussion
+about: This is the right place
+
+---
+
+

.github/ISSUE_TEMPLATE/5-other.md

@@ -0,0 +1,7 @@
+---
+name: Anything else!
+about: Whatever is on your mind
+
+---
+
+

.gitignore

@@ -1,2 +1,4 @@
-/target/
-/Cargo.lock
+target/
+**/*.rs.bk
+*.sw[po]
+Cargo.lock

.travis.yml

@@ -1,16 +1,107 @@
 language: rust
+
+matrix:
+  include:
+    - rust: stable
+      script:
+        - cd "${TRAVIS_BUILD_DIR}/serde"
+        - cargo build --features rc
+        - cargo build --no-default-features
+        - cd "${TRAVIS_BUILD_DIR}/serde_test"
+        - cargo build
+        - cargo test --features serde/derive,serde/rc
+
+    - rust: beta
+      script:
+        - cd "${TRAVIS_BUILD_DIR}/serde"
+        - cargo build --features rc
+        - cd "${TRAVIS_BUILD_DIR}/test_suite"
+        - cargo test
+
+    - rust: nightly
+      script:
+        - cd "${TRAVIS_BUILD_DIR}/serde"
+        - cargo build
+        - cargo build --no-default-features
+        - cargo build --no-default-features --features alloc
+        - cargo build --no-default-features --features rc,alloc
+        - cargo test --features derive,rc,unstable
+        - cd "${TRAVIS_BUILD_DIR}/test_suite"
+        - cargo test --features unstable
+        - cd "${TRAVIS_BUILD_DIR}/test_suite/no_std"
+        - cargo build
+
+    - rust: 1.13.0
+      script:
+        - cd "${TRAVIS_BUILD_DIR}/serde"
+        - cargo build --features rc
+        - cargo build --no-default-features
+        - cd "${TRAVIS_BUILD_DIR}/serde_test"
+        - cargo build
+
+    - rust: 1.19.0
+    - rust: 1.20.0
+    - rust: 1.21.0
+    - rust: 1.25.0
+    - rust: 1.26.0
+
+    # Work around failing to parse manifest because editions are unstable.
+    - rust: 1.27.0
+      before_script: sed -i /test_suite/d Cargo.toml
+    - rust: 1.28.0
+      before_script: sed -i /test_suite/d Cargo.toml
+
+    - rust: 1.31.0
+      script:
+        - cd "${TRAVIS_BUILD_DIR}/serde_derive"
+        - cargo build
+
+    - rust: 1.34.0
+
+    - rust: 1.36.0
+      script:
+        - cd "${TRAVIS_BUILD_DIR}/serde"
+        - cargo build --no-default-features --features alloc
+
+    - rust: nightly
+      name: Clippy
+      script:
+        - rustup component add clippy || travis_terminate 0
+        - cargo clippy -- -D clippy::all
+        - cd "${TRAVIS_BUILD_DIR}/serde"
+        - cargo clippy --features rc,unstable -- -D clippy::all
+        - cd "${TRAVIS_BUILD_DIR}/serde_derive"
+        - cargo clippy -- -D clippy::all
+        - cd "${TRAVIS_BUILD_DIR}/serde_test"
+        - cargo clippy -- -D clippy::all
+        - cd "${TRAVIS_BUILD_DIR}/test_suite"
+        - cargo clippy --tests --features unstable -- -D clippy::all
+        - cd "${TRAVIS_BUILD_DIR}/test_suite/no_std"
+        - cargo clippy -- -D clippy::all
+
+    - rust: nightly
+      name: Emscripten
+      script:
+        - CARGO_WEB_RELEASE=$(curl -L -s -H Accept:application/json https://github.com/koute/cargo-web/releases/latest)
+        - CARGO_WEB_VERSION=$(echo "${CARGO_WEB_RELEASE}" | jq -r .tag_name)
+        - CARGO_WEB_URL="https://github.com/koute/cargo-web/releases/download/${CARGO_WEB_VERSION}/cargo-web-x86_64-unknown-linux-gnu.gz"
+
+        - nvm install 9
+        - mkdir -p ~/.cargo/bin
+        - curl -L "${CARGO_WEB_URL}" | gzip -d > ~/.cargo/bin/cargo-web
+        - chmod +x ~/.cargo/bin/cargo-web
+
+        - cd "${TRAVIS_BUILD_DIR}/test_suite"
+        - cargo web test --target=asmjs-unknown-emscripten --nodejs
+        - cargo web test --target=wasm32-unknown-emscripten --nodejs
+
+  allow_failures:
+    - rust: nightly
+      name: Clippy
+    - rust: nightly
+      name: Emscripten
+
 script:
-- cargo test
-- cargo bench
-- cargo doc
-after_success: |
-  [ $TRAVIS_BRANCH = "master" ] &&
-  [ $TRAVIS_PULL_REQUEST  = false ] &&
-  cargo doc &&
-  echo "<meta http-equiv=refresh content=0;url=`echo $TRAVIS_REPO_SLUG | cut -d '/' -f 2`/index.html>" > target/doc/index.html &&
-  sudo pip install ghp-import &&
-  ghp-import -n target/doc &&
-  git push -fq https://${GH_TOKEN}@github.com/${TRAVIS_REPO_SLUG}.git gh-pages
-env:
-  global:
-    secure: HO41LMpMXkF2In9+1sxWVu7fgolL+y9+4Q5PI6wZX2L5pDwpPJCjxaQarQXCEnoIxED1PlP03JuF7ULNz0zw1ylYhAOfOSdkxFZRnE2wMZqq6qvXBHwyMiDrAociIzoPKSGv7JVrKPsjsnd+96K6xxueIodQZrmAdyq7N/M82Mc=
+  - cd "${TRAVIS_BUILD_DIR}/serde"
+  - cargo build --no-default-features
+  - cargo build

CONTRIBUTING.md

@@ -0,0 +1,66 @@
+# Contributing to Serde
+
+Serde welcomes contribution from everyone in the form of suggestions, bug
+reports, pull requests, and feedback. This document gives some guidance if you
+are thinking of helping us.
+
+Please reach out here in a GitHub issue or in the #serde IRC channel on
+[`irc.mozilla.org`] if we can do anything to help you contribute.
+
+[`irc.mozilla.org`]: https://wiki.mozilla.org/IRC
+
+## Submitting bug reports and feature requests
+
+Serde development is spread across lots of repositories, but this serde-rs/serde
+repository is always a safe choice for opening any issues related to Serde.
+
+When reporting a bug or asking for help, please include enough details so that
+the people helping you can reproduce the behavior you are seeing. For some tips
+on how to approach this, read about how to produce a [Minimal, Complete, and
+Verifiable example].
+
+[Minimal, Complete, and Verifiable example]: https://stackoverflow.com/help/mcve
+
+When making a feature request, please make it clear what problem you intend to
+solve with the feature, any ideas for how Serde could support solving that
+problem, any possible alternatives, and any disadvantages.
+
+## Running the test suite
+
+We encourage you to check that the test suite passes locally before submitting a
+pull request with your changes. If anything does not pass, typically it will be
+easier to iterate and fix it locally than waiting for the CI servers to run
+tests for you.
+
+##### In the [`serde`] directory
+
+```sh
+# Test all the example code in Serde documentation
+cargo test
+```
+
+##### In the [`test_suite/deps`] directory
+
+```sh
+# This is a prerequisite for running the full test suite
+cargo clean && cargo update && cargo build
+```
+
+##### In the [`test_suite`] directory
+
+```sh
+# Run the full test suite, including tests of unstable functionality
+cargo test --features unstable
+```
+
+[`serde`]: https://github.com/serde-rs/serde/tree/master/serde
+[`test_suite/deps`]: https://github.com/serde-rs/serde/tree/master/test_suite/deps
+[`test_suite`]: https://github.com/serde-rs/serde/tree/master/test_suite
+
+## Conduct
+
+In all Serde-related forums, we follow the [Rust Code of Conduct]. For
+escalation or moderation issues please contact Erick (erick.tryzelaar@gmail.com)
+instead of the Rust moderation team.
+
+[Rust Code of Conduct]: https://www.rust-lang.org/conduct.html

Cargo.toml

@@ -1,17 +1,8 @@
-[package]
-name = "serde"
-version = "0.3.3"
-authors = ["Erick Tryzelaar <erick.tryzelaar@gmail.com>"]
-license = "MIT/Apache-2.0"
-description = "A generic serialization/deserialization framework"
-repository = "https://github.com/serde-rs/serde"
-documentation = "http://serde-rs.github.io/serde/serde"
-readme = "README.md"
-keywords = ["serialization"]
-
-[dependencies]
-num = "*"
-
-[dev-dependencies]
-rustc-serialize = "*"
-serde_macros = { version = "*", path = "serde_macros" }
+[workspace]
+members = [
+    "serde",
+    "serde_derive",
+    "serde_derive_internals",
+    "serde_test",
+    "test_suite",
+]

LICENSE

@@ -1,33 +0,0 @@
-See LICENSE-APACHE and LICENSE-MIT.
-
-----
-
-bench_log is derived from https://github.com/cloudflare/goser, which has the
-following license:
-
-Copyright (c) 2013, CloudFlare, Inc.
-All rights reserved.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are met:
-
-* Redistributions of source code must retain the above copyright
-  notice, this list of conditions and the following disclaimer.
-* Redistributions in binary form must reproduce the above copyright
-  notice, this list of conditions and the following disclaimer in the
-  documentation and/or other materials provided with the distribution.
-* Neither the name of the author nor the
-  names of its contributors may be used to endorse or promote products
-  derived from this software without specific prior written permission.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
-ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
-DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
-(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
-LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
-ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-

LICENSE-MIT

@@ -1,5 +1,3 @@
-Copyright (c) 2014 The Rust Project Developers
-
 Permission is hereby granted, free of charge, to any
 person obtaining a copy of this software and associated
 documentation files (the "Software"), to deal in the

README.md

@@ -1,424 +1,101 @@
-Serde Rust Serialization Framework
-==================================
+# Serde   [![Build Status]][travis] [![Latest Version]][crates.io] [![serde: rustc 1.13+]][Rust 1.13] [![serde_derive: rustc 1.31+]][Rust 1.31]
 
-[![Build Status](https://api.travis-ci.org/serde-rs/serde.png?branch=master)](https://travis-ci.org/serde-rs/serde)
-[![Latest Version](https://img.shields.io/crates/v/serde.svg)](https://crates.io/crates/serde)
+[Build Status]: https://api.travis-ci.org/serde-rs/serde.svg?branch=master
+[travis]: https://travis-ci.org/serde-rs/serde
+[Latest Version]: https://img.shields.io/crates/v/serde.svg
+[crates.io]: https://crates.io/crates/serde
+[serde: rustc 1.13+]: https://img.shields.io/badge/serde-rustc_1.13+-lightgray.svg
+[serde_derive: rustc 1.31+]: https://img.shields.io/badge/serde_derive-rustc_1.31+-lightgray.svg
+[Rust 1.13]: https://blog.rust-lang.org/2016/11/10/Rust-1.13.html
+[Rust 1.31]: https://blog.rust-lang.org/2018/12/06/Rust-1.31-and-rust-2018.html
 
-Serde is a powerful framework that enables serialization libraries to
-generically serialize Rust data structures without the overhead of runtime type
-information. In many situations, the handshake protocol between serializers and
-serializees can be completely optimized away, leaving Serde to perform roughly
-the same speed as a hand written serializer for a specific type.
+**Serde is a framework for *ser*ializing and *de*serializing Rust data structures efficiently and generically.**
 
-Documentation is available at http://serde-rs.github.io/serde/serde
+---
 
-Making a Type Serializable
-==========================
+You may be looking for:
 
-The simplest way to make a type serializable is to use the `serde_macros`
-syntax extension, which comes with a `#[derive(Serialize, Deserialize)]`
-annotation, which automatically generates implementations of 
-[Serialize](http://serde-rs.github.io/serde/serde/ser/trait.Serialize.html)
-and
-[Deserialize](http://serde-rs.github.io/serde/serde/de/trait.Deserialize.html)
-for the annotated type:
+- [An overview of Serde](https://serde.rs/)
+- [Data formats supported by Serde](https://serde.rs/#data-formats)
+- [Setting up `#[derive(Serialize, Deserialize)]`](https://serde.rs/derive.html)
+- [Examples](https://serde.rs/examples.html)
+- [API documentation](https://docs.serde.rs/serde/)
+- [Release notes](https://github.com/serde-rs/serde/releases)
 
-```rust
-#[feature(custom_derive, plugin)]
-#[plugin(serde_macros)]
+## Serde in action
 
-extern crate serde;
+<details>
+<summary>
+Click to show Cargo.toml.
+<a href="https://play.rust-lang.org/?edition=2018&gist=72755f28f99afc95e01d63174b28c1f5" target="_blank">Run this code in the playground.</a>
+</summary>
 
-...
+```toml
+[dependencies]
 
-#[derive(Serialize, Deserialize)]
-struct Point {
-    x: i32,
-    y: i32,
-}
+# The core APIs, including the Serialize and Deserialize traits. Always
+# required when using Serde. The "derive" feature is only required when
+# using #[derive(Serialize, Deserialize)] to make Serde work with structs
+# and enums defined in your crate.
+serde = { version = "1.0", features = ["derive"] }
+
+# Each data format lives in its own crate; the sample code below uses JSON
+# but you may be using a different one.
+serde_json = "1.0"
 ```
 
-Serde bundles a high performance JSON serializer and deserializer,
-[serde::json](http://serde-rs.github.io/serde/serde/json/index.html),
-which comes with the helper functions
-[to_string](http://serde-rs.github.io/serde/serde/json/ser/fn.to_string.html)
-and
-[from_str](http://serde-rs.github.io/serde/serde/json/de/fn.from_str.html)
-that make it easy to go to and from JSON:
+</details>
+<p></p>
 
 ```rust
-use serde::json;
+use serde::{Serialize, Deserialize};
 
-...
-
-let point = Point { x: 1, y: 2 };
-let serialized_point = json::to_string(&point).unwrap();
-
-println!("{}", serialized_point); // prints: {"x":1,"y":2}
-
-let deserialize_point: Point = json::from_str(&serialized_point).unwrap();
-```
-
-[serde::json](http://serde-rs.github.io/serde/serde/json/index.html) also
-supports a generic
-[Value](http://serde-rs.github.io/serde/serde/json/value/enum.Value.html)
-type, which can represent any JSON value. Also, any
-[Serialize](http://serde-rs.github.io/serde/serde/ser/trait.Serialize.html)
-and
-[Deserialize](http://serde-rs.github.io/serde/serde/de/trait.Deserialize.html)
-can be converted into a 
-[Value](http://serde-rs.github.io/serde/serde/json/value/enum.Value.html)
-with the methods
-[to_value](http://serde-rs.github.io/serde/serde/json/value/fn.to_value.html)
-and
-[from_value](http://serde-rs.github.io/serde/serde/json/value/fn.from_value.html):
-
-```rust
-let point = Point { x: 1, y: 2 };
-let point_value = json::to_value(&point).unwrap();
-
-println!("{}", point_value.find("x")); // prints: Some(1)
-
-let deserialize_point: Point = json::from_value(point_value).unwrap();
-```
-
-Serialization without Macros
-============================
-
-Under the covers, Serde extensively uses the Visitor pattern to thread state
-between the
-[Serializer](http://serde-rs.github.io/serde/serde/ser/trait.Serializer.html)
-and
-[Serialize](http://serde-rs.github.io/serde/serde/ser/trait.Serialize.html)
-without the two having specific information about each other's concrete type.
-This has many of the same benefits as frameworks that use runtime type
-information without the overhead.  In fact, when compiling with optimizations,
-Rust is able to remove most or all the visitor state, and generate code that's
-nearly as fast as a hand written serializer format for a specific type.
-
-To see it in action, lets look at how a simple type like `i32` is serialized.
-The
-[Serializer](http://serde-rs.github.io/serde/serde/ser/trait.Serializer.html)
-is threaded through the type:
-
-```rust
-impl serde::Serialize for i32 {
-    fn serialize<S>(&self, serializer: &mut S) -> Result<(), S::Error>
-        where S: serde::Serializer,
-    {
-        serializer.visit_i32(*self)
-    }
-}
-```
-
-As you can see it's pretty simple. More complex types like `BTreeMap` need to
-pass a
-[MapVisitor](http://serde-rs.github.io/serde/serde/ser/trait.MapVisitor.html)
-to the 
-[Serializer](http://serde-rs.github.io/serde/serde/ser/trait.Serializer.html)
-in order to walk through the type:
-
-```rust
-impl<K, V> Serialize for BTreeMap<K, V>
-    where K: Serialize + Ord,
-          V: Serialize,
-{
-    #[inline]
-    fn serialize<S>(&self, serializer: &mut S) -> Result<(), S::Error>
-        where S: Serializer,
-    {
-        serializer.visit_map(MapIteratorVisitor::new(self.iter(), Some(self.len())))
-    }
-}
-
-pub struct MapIteratorVisitor<Iter> {
-    iter: Iter,
-    len: Option<usize>,
-}
-
-impl<K, V, Iter> MapIteratorVisitor<Iter>
-    where Iter: Iterator<Item=(K, V)>
-{
-    #[inline]
-    pub fn new(iter: Iter, len: Option<usize>) -> MapIteratorVisitor<Iter> {
-        MapIteratorVisitor {
-            iter: iter,
-            len: len,
-        }
-    }
-}
-
-impl<K, V, I> MapVisitor for MapIteratorVisitor<I>
-    where K: Serialize,
-          V: Serialize,
-          I: Iterator<Item=(K, V)>,
-{
-    #[inline]
-    fn visit<S>(&mut self, serializer: &mut S) -> Result<Option<()>, S::Error>
-        where S: Serializer,
-    {
-        match self.iter.next() {
-            Some((key, value)) => {
-                let value = try!(serializer.visit_map_elt(key, value));
-                Ok(Some(value))
-            }
-            None => Ok(None)
-        }
-    }
-
-    #[inline]
-    fn len(&self) -> Option<usize> {
-        self.len
-    }
-}
-```
-
-Serializing structs follow this same pattern. In fact, structs are represented
-as a named map. It's visitor uses a simple state machine to iterate through all
-the fields:
-
-```rust
+#[derive(Serialize, Deserialize, Debug)]
 struct Point {
     x: i32,
     y: i32,
 }
 
-impl serde::Serialize for Point {
-    fn serialize<S>(&self, serializer: &mut S) -> Result<(), S::Error>
-        where S: serde::Serializer
-    {
-        serializer.visit_named_map("Point", PointMapVisitor {
-            value: self,
-            state: 0,
-        })
-    }
-}
+fn main() {
+    let point = Point { x: 1, y: 2 };
 
-struct PointMapVisitor<'a> {
-    value: &'a Point,
-    state: u8,
-}
+    // Convert the Point to a JSON string.
+    let serialized = serde_json::to_string(&point).unwrap();
 
-impl<'a> serde::ser::MapVisitor for PointMapVisitor<'a> {
-    fn visit<S>(&mut self, serializer: &mut S) -> Result<Option<()>, S::Error>
-        where S: serde::Serializer
-    {
-        match self.state {
-            0 => {
-                self.state += 1;
-                Ok(Some(try!(serializer.visit_map_elt("x", &self.value.x))))
-            }
-            1 => {
-                self.state += 1;
-                Ok(Some(try!(serializer.visit_map_elt("y", &self.value.y))))
-            }
-            _ => {
-                Ok(None)
-            }
-        }
-    }
+    // Prints serialized = {"x":1,"y":2}
+    println!("serialized = {}", serialized);
+
+    // Convert the JSON string back to a Point.
+    let deserialized: Point = serde_json::from_str(&serialized).unwrap();
+
+    // Prints deserialized = Point { x: 1, y: 2 }
+    println!("deserialized = {:?}", deserialized);
 }
 ```
 
-Deserialization without Macros
-==============================
+## Getting help
 
-Deserialization is a little more complicated since there's a bit more error
-handling that needs to occur. Let's start with the simple `i32`
-[Deserialize](http://serde-rs.github.io/serde/serde/de/trait.Deserialize.html)
-implementation. It passes a
-[Visitor](http://serde-rs.github.io/serde/serde/de/trait.Visitor.html) to the
-[Deserializer](http://serde-rs.github.io/serde/serde/de/trait.Deserializer.html).
-The [Visitor](http://serde-rs.github.io/serde/serde/de/trait.Visitor.html)
-can create the `i32` from a variety of different types:
+Serde developers live in the #serde channel on [`irc.mozilla.org`][irc]. The
+\#rust channel is also a good resource with generally faster response time but
+less specific knowledge about Serde. If IRC is not your thing or you don't get a
+good response, we are happy to respond to [GitHub issues][issues] as well.
 
-```rust
-impl Deserialize for i32 {
-    fn deserialize<D>(deserializer: &mut D) -> Result<i32, D::Error>
-        where D: serde::Deserializer,
-    {
-        deserializer.visit(I32Visitor)
-    }
-}
+[irc]: https://wiki.mozilla.org/IRC
+[issues]: https://github.com/serde-rs/serde/issues/new/choose
 
-struct I32Visitor;
+<br>
 
-impl serde::de::Visitor for I32Visitor {
-    type Value = i32;
+#### License
 
-    fn visit_i16<E>(&mut self, value: i16) -> Result<i16, E>
-        where E: Error,
-    {
-        self.visit_i32(value as i32)
-    }
+<sup>
+Licensed under either of <a href="LICENSE-APACHE">Apache License, Version
+2.0</a> or <a href="LICENSE-MIT">MIT license</a> at your option.
+</sup>
 
-    fn visit_i32<E>(&mut self, value: i32) -> Result<i32, E>
-        where E: Error,
-    {
-        Ok(value)
-    }
+<br>
 
-    ...
-
-```
-
-Since it's possible for this type to get passed an unexpected type, we need a
-way to error out. This is done by way of the
-[Error](http://serde-rs.github.io/serde/serde/de/trait.Error.html) trait,
-which allows a 
-[Deserialize](http://serde-rs.github.io/serde/serde/de/trait.Deserialize.html)
-to generate an error for a few common error conditions. Here's how it could be used:
-
-```rust
-    ...
-
-    fn visit_string<E>(&mut self, _: String) -> Result<i32, E>
-        where E: Error,
-    {
-        Err(serde::de::Error::syntax_error())
-    }
-
-    ...
-
-```
-
-Maps follow a similar pattern as before, and use a
-[MapVisitor](http://serde-rs.github.io/serde/serde/de/trait.MapVisitor.html)
-to walk through the values generated by the 
-[Deserializer](http://serde-rs.github.io/serde/serde/de/trait.Deserializer.html).
-
-```rust
-impl<K, V> serde::Deserialize for BTreeMap<K, V>
-    where K: serde::Deserialize + Eq + Ord,
-          V: serde::Deserialize,
-{
-    fn deserialize<D>(deserializer: &mut D) -> Result<BTreeMap<K, V>, D::Error>
-        where D: serde::Deserializer,
-    {
-        deserializer.visit(BTreeMapVisitor::new())
-    }
-}
-
-pub struct BTreeMapVisitor<K, V> {
-    marker: PhantomData<BTreeMap<K, V>>,
-}
-
-impl<K, V> BTreeMapVisitor<K, V> {
-    pub fn new() -> Self {
-        BTreeMapVisitor {
-            marker: PhantomData,
-        }
-    }
-}
-
-impl<K, V> serde::de::Visitor for BTreeMapVisitor<K, V>
-    where K: serde::de::Deserialize + Ord,
-          V: serde::de::Deserialize
-{
-    type Value = BTreeMap<K, V>;
-
-    fn visit_unit<E>(&mut self) -> Result<BTreeMap<K, V>, E>
-        where E: Error,
-    {
-        Ok(BTreeMap::new())
-    }
-
-    fn visit_map<V_>(&mut self, mut visitor: V_) -> Result<BTreeMap<K, V>, V_::Error>
-        where V_: MapVisitor,
-    {
-        let mut values = BTreeMap::new();
-
-        while let Some((key, value)) = try!(visitor.visit()) {
-            values.insert(key, value);
-        }
-
-        try!(visitor.end());
-
-        Ok(values)
-    }
-}
-
-```
-
-Deserializing structs goes a step further in order to support not allocating a
-`String` to hold the field names. This is done by custom field enum that
-deserializes an enum variant from a string. So for our `Point` example from
-before, we need to generate:
-
-```rust
-enum PointField {
-    X,
-    Y,
-}
-
-impl serde::Deserialize for PointField {
-    fn deserialize<D>(deserializer: &mut D) -> Result<PointField, D::Error>
-        where D: serde::de::Deserializer
-    {
-        struct FieldVisitor;
-
-        impl serde::de::Visitor for FieldVisitor {
-            type Value = Field;
-
-            fn visit_str<E>(&mut self, value: &str) -> Result<PointField, E>
-                where E: serde::de::Error
-            {
-                match value {
-                    "x" => Ok(Field::X),
-                    "y" => Ok(Field::Y),
-                    _ => Err(serde::de::Error::syntax_error()),
-                }
-            }
-        }
-
-        deserializer.visit(FieldVisitor)
-    }
-}
-```
-
-This is then used in our actual deserializer:
-
-```rust
-impl serde::Deserialize for Point {
-    fn deserialize<D>(deserializer: &mut D) -> Result<Point, D::Error>
-        where D: serde::de::Deserializer
-    {
-        deserializer.visit_named_map("Point", PointVisitor)
-    }
-}
-
-struct PointVisitor;
-
-impl serde::de::Visitor for PointVisitor {
-    type Value = Point;
-
-    fn visit_map<V>(&mut self, mut visitor: V) -> Result<Point, V::Error>
-        where V: serde::de::MapVisitor
-    {
-        let mut x = None;
-        let mut y = None;
-
-        loop {
-            match try!(visitor.visit_key()) {
-                Some(Field::X) => { x = Some(try!(visitor.visit_value())); }
-                Some(Field::Y) => { y = Some(try!(visitor.visit_value())); }
-                None => { break; }
-            }
-        }
-
-        let x = match x {
-            Some(x) => x,
-            None => try!(visitor.missing_field("x")),
-        };
-
-        let y = match y {
-            Some(y) => y,
-            None => try!(visitor.missing_field("y")),
-        };
-
-        try!(visitor.end());
-
-        Ok(Point{ x: x, y: y })
-    }
-}
-```
+<sub>
+Unless you explicitly state otherwise, any contribution intentionally submitted
+for inclusion in Serde by you, as defined in the Apache-2.0 license, shall be
+dual licensed as above, without any additional terms or conditions.
+</sub>

appveyor.yml

@@ -0,0 +1,39 @@
+environment:
+  matrix:
+    - APPVEYOR_RUST_CHANNEL: stable
+    - APPVEYOR_RUST_CHANNEL: nightly
+
+install:
+  # Install rust, x86_64-pc-windows-msvc host
+  - curl -sSf -o rustup-init.exe https://win.rustup.rs/
+  - rustup-init.exe -y --default-host x86_64-pc-windows-msvc --default-toolchain %APPVEYOR_RUST_CHANNEL%
+  - set PATH=C:\msys64\usr\bin;%PATH%;C:\Users\appveyor\.cargo\bin
+  - rustc -vV
+  - cargo -vV
+
+build: false
+
+for:
+  - matrix:
+      only:
+        - APPVEYOR_RUST_CHANNEL: stable
+    test_script:
+      - cd %APPVEYOR_BUILD_FOLDER%\serde
+      - cargo build --features rc
+      - cargo build --no-default-features
+      - cd %APPVEYOR_BUILD_FOLDER%\serde_test
+      - cargo build
+      - cargo test --features serde/derive,serde/rc
+
+  - matrix:
+      only:
+        - APPVEYOR_RUST_CHANNEL: nightly
+    test_script:
+      - cd %APPVEYOR_BUILD_FOLDER%\serde
+      - cargo build
+      - cargo build --no-default-features
+      - cargo build --no-default-features --features alloc
+      - cargo build --no-default-features --features rc,alloc
+      - cargo test --features derive,rc,unstable
+      - cd %APPVEYOR_BUILD_FOLDER%\test_suite
+      - cargo test --features unstable

benches/bench_enum.rs

@@ -1,454 +0,0 @@
-#![feature(custom_derive, plugin, test)]
-#![plugin(serde_macros)]
-
-extern crate serde;
-extern crate rustc_serialize;
-extern crate test;
-
-use test::Bencher;
-
-use rustc_serialize::{Decoder, Decodable};
-
-use serde::de::{Deserializer, Deserialize};
-
-use Animal::{Dog, Frog};
-
-//////////////////////////////////////////////////////////////////////////////
-
-#[derive(Clone, PartialEq, Debug, RustcDecodable, Deserialize)]
-pub enum Animal {
-    Dog,
-    Frog(String, isize)
-}
-
-//////////////////////////////////////////////////////////////////////////////
-
-#[derive(Debug)]
-pub enum Error {
-    EndOfStreamError,
-    SyntaxError,
-}
-
-impl serde::de::Error for Error {
-    fn syntax_error() -> Error { Error::SyntaxError }
-
-    fn end_of_stream_error() -> Error { Error::EndOfStreamError }
-
-    fn unknown_field_error(_: &str) -> Error { Error::SyntaxError }
-
-    fn missing_field_error(_: &'static str) -> Error { Error::SyntaxError }
-}
-
-//////////////////////////////////////////////////////////////////////////////
-
-mod decoder {
-    use rustc_serialize::Decoder;
-
-    use super::{Animal, Error};
-    use super::Animal::{Dog, Frog};
-    use self::State::{AnimalState, IsizeState, StringState};
-
-    enum State {
-        AnimalState(Animal),
-        IsizeState(isize),
-        StringState(String),
-    }
-
-    pub struct AnimalDecoder {
-        stack: Vec<State>,
-
-    }
-
-    impl AnimalDecoder {
-        #[inline]
-        pub fn new(animal: Animal) -> AnimalDecoder {
-            AnimalDecoder {
-                stack: vec!(AnimalState(animal)),
-            }
-        }
-    }
-
-    impl Decoder for AnimalDecoder {
-        type Error = Error;
-
-        fn error(&mut self, _: &str) -> Error { Error::SyntaxError }
-
-        // Primitive types:
-        fn read_nil(&mut self) -> Result<(), Error> { Err(Error::SyntaxError) }
-        fn read_usize(&mut self) -> Result<usize, Error> { Err(Error::SyntaxError) }
-        fn read_u64(&mut self) -> Result<u64, Error> { Err(Error::SyntaxError) }
-        fn read_u32(&mut self) -> Result<u32, Error> { Err(Error::SyntaxError) }
-        fn read_u16(&mut self) -> Result<u16, Error> { Err(Error::SyntaxError) }
-        fn read_u8(&mut self) -> Result<u8, Error> { Err(Error::SyntaxError) }
-        #[inline]
-        fn read_isize(&mut self) -> Result<isize, Error> {
-            match self.stack.pop() {
-                Some(IsizeState(x)) => Ok(x),
-                _ => Err(Error::SyntaxError),
-            }
-        }
-        fn read_i64(&mut self) -> Result<i64, Error> { Err(Error::SyntaxError) }
-        fn read_i32(&mut self) -> Result<i32, Error> { Err(Error::SyntaxError) }
-        fn read_i16(&mut self) -> Result<i16, Error> { Err(Error::SyntaxError) }
-        fn read_i8(&mut self) -> Result<i8, Error> { Err(Error::SyntaxError) }
-        fn read_bool(&mut self) -> Result<bool, Error> { Err(Error::SyntaxError) }
-        fn read_f64(&mut self) -> Result<f64, Error> { Err(Error::SyntaxError) }
-        fn read_f32(&mut self) -> Result<f32, Error> { Err(Error::SyntaxError) }
-        fn read_char(&mut self) -> Result<char, Error> { Err(Error::SyntaxError) }
-        #[inline]
-        fn read_str(&mut self) -> Result<String, Error> {
-            match self.stack.pop() {
-                Some(StringState(x)) => Ok(x),
-                _ => Err(Error::SyntaxError),
-            }
-        }
-
-        // Compound types:
-        #[inline]
-        fn read_enum<T, F>(&mut self, name: &str, f: F) -> Result<T, Error> where
-            F: FnOnce(&mut AnimalDecoder) -> Result<T, Error>,
-        {
-            match self.stack.pop() {
-                Some(AnimalState(animal)) => {
-                    self.stack.push(AnimalState(animal));
-                    if name == "Animal" {
-                        f(self)
-                    } else {
-                        Err(Error::SyntaxError)
-                    }
-                }
-                _ => Err(Error::SyntaxError)
-            }
-        }
-
-        #[inline]
-        fn read_enum_variant<T, F>(&mut self, names: &[&str], f: F) -> Result<T, Error> where
-            F: FnOnce(&mut AnimalDecoder, usize) -> Result<T, Error>,
-        {
-            let name = match self.stack.pop() {
-                Some(AnimalState(Dog)) => "Dog",
-                Some(AnimalState(Frog(x0, x1))) => {
-                    self.stack.push(IsizeState(x1));
-                    self.stack.push(StringState(x0));
-                    "Frog"
-                }
-                _ => { return Err(Error::SyntaxError); }
-            };
-
-            let idx = match names.iter().position(|n| *n == name) {
-                Some(idx) => idx,
-                None => { return Err(Error::SyntaxError); }
-            };
-
-            f(self, idx)
-        }
-
-        #[inline]
-        fn read_enum_variant_arg<T, F>(&mut self, _a_idx: usize, f: F) -> Result<T, Error> where
-            F: FnOnce(&mut AnimalDecoder) -> Result<T, Error>,
-        {
-            f(self)
-        }
-
-        fn read_enum_struct_variant<T, F>(&mut self, _names: &[&str], _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut AnimalDecoder, usize) -> Result<T, Error>,
-        {
-            Err(Error::SyntaxError)
-        }
-
-        fn read_enum_struct_variant_field<T, F>(&mut self, _f_name: &str, _f_idx: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut AnimalDecoder) -> Result<T, Error>,
-        {
-            Err(Error::SyntaxError)
-        }
-
-        fn read_struct<T, F>(&mut self, _s_name: &str, _len: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut AnimalDecoder) -> Result<T, Error>,
-        {
-            Err(Error::SyntaxError)
-        }
-
-        fn read_struct_field<T, F>(&mut self, _f_name: &str, _f_idx: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut AnimalDecoder) -> Result<T, Error>,
-        {
-            Err(Error::SyntaxError)
-        }
-
-        fn read_tuple<T, F>(&mut self, _len: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut AnimalDecoder) -> Result<T, Error>,
-        {
-            Err(Error::SyntaxError)
-        }
-
-        fn read_tuple_arg<T, F>(&mut self, _a_idx: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut AnimalDecoder) -> Result<T, Error>,
-        {
-            Err(Error::SyntaxError)
-        }
-
-        fn read_tuple_struct<T, F>(&mut self, _s_name: &str, _len: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut AnimalDecoder) -> Result<T, Error>,
-        {
-            Err(Error::SyntaxError)
-        }
-
-        fn read_tuple_struct_arg<T, F>(&mut self, _a_idx: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut AnimalDecoder) -> Result<T, Error>,
-        {
-            Err(Error::SyntaxError)
-        }
-
-        // Specialized types:
-        fn read_option<T, F>(&mut self, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut AnimalDecoder, bool) -> Result<T, Error>,
-        {
-            Err(Error::SyntaxError)
-        }
-
-        #[inline]
-        fn read_seq<T, F>(&mut self, f: F) -> Result<T, Error> where
-            F: FnOnce(&mut AnimalDecoder, usize) -> Result<T, Error>,
-        {
-            f(self, 3)
-        }
-
-        #[inline]
-        fn read_seq_elt<T, F>(&mut self, _idx: usize, f: F) -> Result<T, Error> where
-            F: FnOnce(&mut AnimalDecoder) -> Result<T, Error>,
-        {
-            f(self)
-        }
-
-        fn read_map<T, F>(&mut self, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut AnimalDecoder, usize) -> Result<T, Error>,
-        {
-            Err(Error::SyntaxError)
-        }
-
-        fn read_map_elt_key<T, F>(&mut self, _idx: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut AnimalDecoder) -> Result<T, Error>,
-        {
-            Err(Error::SyntaxError)
-        }
-
-        fn read_map_elt_val<T, F>(&mut self, _idx: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut AnimalDecoder) -> Result<T, Error>,
-        {
-            Err(Error::SyntaxError)
-        }
-    }
-}
-
-//////////////////////////////////////////////////////////////////////////////
-
-mod deserializer {
-    use super::{Animal, Error};
-
-    use serde::de;
-
-    #[derive(Debug)]
-    enum State {
-        AnimalState(Animal),
-        IsizeState(isize),
-        StrState(&'static str),
-        StringState(String),
-        UnitState,
-    }
-
-    pub struct AnimalDeserializer {
-        stack: Vec<State>,
-    }
-
-    impl AnimalDeserializer {
-        #[inline]
-        pub fn new(animal: Animal) -> AnimalDeserializer {
-            AnimalDeserializer {
-                stack: vec!(State::AnimalState(animal)),
-            }
-        }
-    }
-
-    impl de::Deserializer for AnimalDeserializer {
-        type Error = Error;
-
-        #[inline]
-        fn visit<V>(&mut self, mut visitor: V) -> Result<V::Value, Error>
-            where V: de::Visitor,
-        {
-            match self.stack.pop() {
-                Some(State::IsizeState(value)) => {
-                    visitor.visit_isize(value)
-                }
-                Some(State::StringState(value)) => {
-                    visitor.visit_string(value)
-                }
-                Some(State::StrState(value)) => {
-                    visitor.visit_str(value)
-                }
-                Some(State::UnitState) => {
-                    visitor.visit_unit()
-                }
-                Some(_) => {
-                    Err(Error::SyntaxError)
-                }
-                None => {
-                    Err(Error::EndOfStreamError)
-                }
-            }
-        }
-
-        #[inline]
-        fn visit_enum<V>(&mut self, _name: &str, mut visitor: V) -> Result<V::Value, Error>
-            where V: de::EnumVisitor,
-        {
-            match self.stack.pop() {
-                Some(State::AnimalState(Animal::Dog)) => {
-                    self.stack.push(State::UnitState);
-                    self.stack.push(State::StrState("Dog"));
-                    visitor.visit(DogVisitor {
-                        de: self,
-                    })
-                }
-                Some(State::AnimalState(Animal::Frog(x0, x1))) => {
-                    self.stack.push(State::IsizeState(x1));
-                    self.stack.push(State::StringState(x0));
-                    self.stack.push(State::StrState("Frog"));
-                    visitor.visit(FrogVisitor {
-                        de: self,
-                        state: 0,
-                    })
-                }
-                Some(_) => {
-                    Err(Error::SyntaxError)
-                }
-                None => {
-                    Err(Error::EndOfStreamError)
-                }
-            }
-        }
-    }
-
-    struct DogVisitor<'a> {
-        de: &'a mut AnimalDeserializer,
-    }
-
-    impl<'a> de::VariantVisitor for DogVisitor<'a> {
-        type Error = Error;
-
-        fn visit_variant<V>(&mut self) -> Result<V, Error>
-            where V: de::Deserialize
-        {
-            de::Deserialize::deserialize(self.de)
-        }
-
-        fn visit_unit(&mut self) -> Result<(), Error> {
-            de::Deserialize::deserialize(self.de)
-        }
-    }
-
-    struct FrogVisitor<'a> {
-        de: &'a mut AnimalDeserializer,
-        state: usize,
-    }
-
-    impl<'a> de::VariantVisitor for FrogVisitor<'a> {
-        type Error = Error;
-
-        fn visit_variant<V>(&mut self) -> Result<V, Error>
-            where V: de::Deserialize
-        {
-            de::Deserialize::deserialize(self.de)
-        }
-
-        fn visit_seq<V>(&mut self, mut visitor: V) -> Result<V::Value, Error>
-            where V: de::Visitor,
-        {
-            visitor.visit_seq(self)
-        }
-    }
-
-    impl<'a> de::SeqVisitor for FrogVisitor<'a> {
-        type Error = Error;
-
-        fn visit<T>(&mut self) -> Result<Option<T>, Error>
-            where T: de::Deserialize,
-        {
-            match self.state {
-                0 => {
-                    self.state += 1;
-                    Ok(Some(try!(de::Deserialize::deserialize(self.de))))
-                }
-                1 => {
-                    self.state += 1;
-                    Ok(Some(try!(de::Deserialize::deserialize(self.de))))
-                }
-                _ => {
-                    Ok(None)
-                }
-            }
-        }
-
-        fn end(&mut self) -> Result<(), Error> {
-            if self.state == 2 {
-                Ok(())
-            } else {
-                Err(Error::SyntaxError)
-            }
-        }
-
-        fn size_hint(&self) -> (usize, Option<usize>) {
-            let len = 2 - self.state;
-            (len, Some(len))
-        }
-    }
-}
-
-//////////////////////////////////////////////////////////////////////////////
-
-#[bench]
-fn bench_decoder_dog(b: &mut Bencher) {
-    b.iter(|| {
-        let animal = Dog;
-
-        let mut d = decoder::AnimalDecoder::new(animal.clone());
-        let value: Animal = Decodable::decode(&mut d).unwrap();
-
-        assert_eq!(value, animal);
-    })
-}
-
-#[bench]
-fn bench_decoder_frog(b: &mut Bencher) {
-    b.iter(|| {
-        let animal = Frog("Henry".to_string(), 349);
-
-        let mut d = decoder::AnimalDecoder::new(animal.clone());
-        let value: Animal = Decodable::decode(&mut d).unwrap();
-
-        assert_eq!(value, animal);
-    })
-}
-
-#[bench]
-fn bench_deserializer_dog(b: &mut Bencher) {
-    b.iter(|| {
-        let animal = Dog;
-
-        let mut d = deserializer::AnimalDeserializer::new(animal.clone());
-        let value: Animal = Deserialize::deserialize(&mut d).unwrap();
-
-        assert_eq!(value, animal);
-    })
-}
-
-#[bench]
-fn bench_deserializer_frog(b: &mut Bencher) {
-    b.iter(|| {
-        let animal = Frog("Henry".to_string(), 349);
-
-        let mut d = deserializer::AnimalDeserializer::new(animal.clone());
-        let value: Animal = Deserialize::deserialize(&mut d).unwrap();
-
-        assert_eq!(value, animal);
-    })
-}

benches/bench_map.rs

@@ -1,464 +0,0 @@
-#![feature(custom_derive, plugin, test)]
-#![plugin(serde_macros)]
-
-extern crate serde;
-extern crate rustc_serialize;
-extern crate test;
-
-use std::fmt::Debug;
-use std::collections::HashMap;
-use test::Bencher;
-
-use rustc_serialize::{Decoder, Decodable};
-
-use serde::de::{Deserializer, Deserialize};
-
-//////////////////////////////////////////////////////////////////////////////
-
-#[derive(PartialEq, Debug)]
-pub enum Error {
-    EndOfStream,
-    SyntaxError,
-    MissingField,
-}
-
-impl serde::de::Error for Error {
-    fn syntax_error() -> Error { Error::SyntaxError }
-
-    fn end_of_stream_error() -> Error { Error::EndOfStream }
-
-    fn unknown_field_error(_: &str) -> Error { Error::SyntaxError }
-
-    fn missing_field_error(_: &'static str) -> Error {
-        Error::MissingField
-    }
-}
-
-//////////////////////////////////////////////////////////////////////////////
-
-mod decoder {
-    use std::collections::HashMap;
-    use std::collections::hash_map::IntoIter;
-    use rustc_serialize;
-
-    use super::Error;
-    use self::Value::{StringValue, IsizeValue};
-
-    enum Value {
-        StringValue(String),
-        IsizeValue(isize),
-    }
-
-    pub struct IsizeDecoder {
-        len: usize,
-        iter: IntoIter<String, isize>,
-        stack: Vec<Value>,
-    }
-
-    impl IsizeDecoder {
-        #[inline]
-        pub fn new(values: HashMap<String, isize>) -> IsizeDecoder {
-            IsizeDecoder {
-                len: values.len(),
-                iter: values.into_iter(),
-                stack: vec!(),
-            }
-        }
-    }
-
-    impl rustc_serialize::Decoder for IsizeDecoder {
-        type Error = Error;
-
-        fn error(&mut self, _msg: &str) -> Error {
-            Error::SyntaxError
-        }
-
-        // Primitive types:
-        fn read_nil(&mut self) -> Result<(), Error> { Err(Error::SyntaxError) }
-        fn read_usize(&mut self) -> Result<usize, Error> { Err(Error::SyntaxError) }
-        fn read_u64(&mut self) -> Result<u64, Error> { Err(Error::SyntaxError) }
-        fn read_u32(&mut self) -> Result<u32, Error> { Err(Error::SyntaxError) }
-        fn read_u16(&mut self) -> Result<u16, Error> { Err(Error::SyntaxError) }
-        fn read_u8(&mut self) -> Result<u8, Error> { Err(Error::SyntaxError) }
-        #[inline]
-        fn read_isize(&mut self) -> Result<isize, Error> {
-            match self.stack.pop() {
-                Some(IsizeValue(x)) => Ok(x),
-                Some(_) => Err(Error::SyntaxError),
-                None => Err(Error::EndOfStream),
-            }
-        }
-        fn read_i64(&mut self) -> Result<i64, Error> { Err(Error::SyntaxError) }
-        fn read_i32(&mut self) -> Result<i32, Error> { Err(Error::SyntaxError) }
-        fn read_i16(&mut self) -> Result<i16, Error> { Err(Error::SyntaxError) }
-        fn read_i8(&mut self) -> Result<i8, Error> { Err(Error::SyntaxError) }
-        fn read_bool(&mut self) -> Result<bool, Error> { Err(Error::SyntaxError) }
-        fn read_f64(&mut self) -> Result<f64, Error> { Err(Error::SyntaxError) }
-        fn read_f32(&mut self) -> Result<f32, Error> { Err(Error::SyntaxError) }
-        fn read_char(&mut self) -> Result<char, Error> { Err(Error::SyntaxError) }
-        #[inline]
-        fn read_str(&mut self) -> Result<String, Error> {
-            match self.stack.pop() {
-                Some(StringValue(x)) => Ok(x),
-                Some(_) => Err(Error::SyntaxError),
-                None => Err(Error::EndOfStream),
-            }
-        }
-
-        // Compound types:
-        fn read_enum<T, F>(&mut self, _name: &str, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut IsizeDecoder) -> Result<T, Error>,
-        {
-            Err(Error::SyntaxError)
-        }
-
-        fn read_enum_variant<T, F>(&mut self, _names: &[&str], _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut IsizeDecoder, usize) -> Result<T, Error>,
-        {
-            Err(Error::SyntaxError)
-        }
-
-        fn read_enum_variant_arg<T, F>(&mut self, _a_idx: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut IsizeDecoder) -> Result<T, Error>,
-        {
-            Err(Error::SyntaxError)
-        }
-
-        fn read_enum_struct_variant<T, F>(&mut self, _names: &[&str], _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut IsizeDecoder, usize) -> Result<T, Error>,
-        {
-            Err(Error::SyntaxError)
-        }
-
-        fn read_enum_struct_variant_field<T, F>(&mut self, _f_name: &str, _f_idx: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut IsizeDecoder) -> Result<T, Error>,
-        {
-            Err(Error::SyntaxError)
-        }
-
-        fn read_struct<T, F>(&mut self, _s_name: &str, _len: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut IsizeDecoder) -> Result<T, Error>,
-        {
-            Err(Error::SyntaxError)
-        }
-
-        fn read_struct_field<T, F>(&mut self, _f_name: &str, _f_idx: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut IsizeDecoder) -> Result<T, Error>,
-        {
-            Err(Error::SyntaxError)
-        }
-
-        fn read_tuple<T, F>(&mut self, _len: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut IsizeDecoder) -> Result<T, Error>,
-        {
-            Err(Error::SyntaxError)
-        }
-
-        fn read_tuple_arg<T, F>(&mut self, _a_idx: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut IsizeDecoder) -> Result<T, Error>,
-        {
-            Err(Error::SyntaxError)
-        }
-
-        fn read_tuple_struct<T, F>(&mut self, _s_name: &str, _len: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut IsizeDecoder) -> Result<T, Error>,
-        {
-            Err(Error::SyntaxError)
-        }
-
-        fn read_tuple_struct_arg<T, F>(&mut self, _a_idx: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut IsizeDecoder) -> Result<T, Error>,
-        {
-            Err(Error::SyntaxError)
-        }
-
-        // Specialized types:
-        fn read_option<T, F>(&mut self, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut IsizeDecoder, bool) -> Result<T, Error>,
-        {
-            Err(Error::SyntaxError)
-        }
-
-        fn read_seq<T, F>(&mut self, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut IsizeDecoder, usize) -> Result<T, Error>,
-        {
-            Err(Error::SyntaxError)
-        }
-
-        fn read_seq_elt<T, F>(&mut self, _idx: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut IsizeDecoder) -> Result<T, Error>,
-        {
-            Err(Error::SyntaxError)
-        }
-
-        #[inline]
-        fn read_map<T, F>(&mut self, f: F) -> Result<T, Error> where
-            F: FnOnce(&mut IsizeDecoder, usize) -> Result<T, Error>,
-        {
-            let len = self.len;
-            f(self, len)
-        }
-        #[inline]
-        fn read_map_elt_key<T, F>(&mut self, _idx: usize, f: F) -> Result<T, Error> where
-            F: FnOnce(&mut IsizeDecoder) -> Result<T, Error>,
-        {
-            match self.iter.next() {
-                Some((key, value)) => {
-                    self.stack.push(IsizeValue(value));
-                    self.stack.push(StringValue(key));
-                    f(self)
-                }
-                None => {
-                    Err(Error::SyntaxError)
-                }
-            }
-        }
-
-        #[inline]
-        fn read_map_elt_val<T, F>(&mut self, _idx: usize, f: F) -> Result<T, Error> where
-            F: FnOnce(&mut IsizeDecoder) -> Result<T, Error>,
-        {
-            f(self)
-        }
-    }
-}
-
-//////////////////////////////////////////////////////////////////////////////
-
-mod deserializer {
-    use std::collections::HashMap;
-    use std::collections::hash_map;
-
-    use super::Error;
-
-    use serde::de;
-
-    #[derive(PartialEq, Debug)]
-    enum State {
-        StartState,
-        KeyState(String),
-        ValueState(isize),
-    }
-
-    pub struct IsizeDeserializer {
-        stack: Vec<State>,
-        iter: hash_map::IntoIter<String, isize>,
-    }
-
-    impl IsizeDeserializer {
-        #[inline]
-        pub fn new(values: HashMap<String, isize>) -> IsizeDeserializer {
-            IsizeDeserializer {
-                stack: vec!(State::StartState),
-                iter: values.into_iter(),
-            }
-        }
-    }
-
-    impl de::Deserializer for IsizeDeserializer {
-        type Error = Error;
-
-        fn visit<V>(&mut self, mut visitor: V) -> Result<V::Value, Error>
-            where V: de::Visitor,
-        {
-            match self.stack.pop() {
-                Some(State::StartState) => {
-                    visitor.visit_map(self)
-                }
-                Some(State::KeyState(key)) => {
-                    visitor.visit_string(key)
-                }
-                Some(State::ValueState(value)) => {
-                    visitor.visit_isize(value)
-                }
-                None => {
-                    Err(Error::EndOfStream)
-                }
-            }
-        }
-    }
-
-    impl de::MapVisitor for IsizeDeserializer {
-        type Error = Error;
-
-        fn visit_key<K>(&mut self) -> Result<Option<K>, Error>
-            where K: de::Deserialize,
-        {
-            match self.iter.next() {
-                Some((key, value)) => {
-                    self.stack.push(State::ValueState(value));
-                    self.stack.push(State::KeyState(key));
-                    Ok(Some(try!(de::Deserialize::deserialize(self))))
-                }
-                None => {
-                    Ok(None)
-                }
-            }
-        }
-
-        fn visit_value<V>(&mut self) -> Result<V, Error>
-            where V: de::Deserialize,
-        {
-            de::Deserialize::deserialize(self)
-        }
-
-        fn end(&mut self) -> Result<(), Error> {
-            match self.iter.next() {
-                Some(_) => Err(Error::SyntaxError),
-                None => Ok(()),
-            }
-        }
-
-        fn size_hint(&self) -> (usize, Option<usize>) {
-            self.iter.size_hint()
-        }
-    }
-
-/*
-    impl Iterator for IsizeDeserializer {
-        type Item = Result<de::Token, Error>;
-
-        #[inline]
-        fn next(&mut self) -> Option<Result<de::Token, Error>> {
-            match self.stack.pop() {
-                Some(StartState) => {
-                    self.stack.push(KeyOrEndState);
-                    Some(Ok(de::Token::MapStart(self.len)))
-                }
-                Some(KeyOrEndState) => {
-                    match self.iter.next() {
-                        Some((key, value)) => {
-                            self.stack.push(ValueState(value));
-                            Some(Ok(de::Token::String(key)))
-                        }
-                        None => {
-                            self.stack.push(EndState);
-                            Some(Ok(de::Token::End))
-                        }
-                    }
-                }
-                Some(ValueState(x)) => {
-                    self.stack.push(KeyOrEndState);
-                    Some(Ok(de::Token::Isize(x)))
-                }
-                Some(EndState) => {
-                    None
-                }
-                None => {
-                    None
-                }
-            }
-        }
-    }
-
-    impl de::Deserializer<Error> for IsizeDeserializer {
-        #[inline]
-        fn end_of_stream_error(&mut self) -> Error {
-            EndOfStream
-        }
-
-        #[inline]
-        fn syntax_error(&mut self, _token: de::Token, _expected: &[de::TokenKind]) -> Error {
-            SyntaxError
-        }
-
-        #[inline]
-        fn unexpected_name_error(&mut self, _token: de::Token) -> Error {
-            SyntaxError
-        }
-
-        #[inline]
-        fn conversion_error(&mut self, _token: de::Token) -> Error {
-            SyntaxError
-        }
-
-        #[inline]
-        fn missing_field<
-            T: de::Deserialize<IsizeDeserializer, Error>
-        >(&mut self, _field: &'static str) -> Result<T, Error> {
-            Err(Error::SyntaxError)
-        }
-    }
-*/
-}
-
-//////////////////////////////////////////////////////////////////////////////
-
-fn run_decoder<
-    D: Decoder<Error=Error>,
-    T: Clone + PartialEq + Debug + Decodable
->(mut d: D, value: T) {
-    let v = Decodable::decode(&mut d);
-
-    assert_eq!(Ok(value), v);
-}
-
-#[bench]
-fn bench_decoder_000(b: &mut Bencher) {
-    b.iter(|| {
-        let m: HashMap<String, isize> = HashMap::new();
-        run_decoder(decoder::IsizeDecoder::new(m.clone()), m)
-    })
-}
-
-#[bench]
-fn bench_decoder_003(b: &mut Bencher) {
-    b.iter(|| {
-        let mut m: HashMap<String, isize> = HashMap::new();
-        for i in (0 .. 3) {
-            m.insert(i.to_string(), i);
-        }
-        run_decoder(decoder::IsizeDecoder::new(m.clone()), m)
-    })
-}
-
-#[bench]
-fn bench_decoder_100(b: &mut Bencher) {
-    b.iter(|| {
-        let mut m: HashMap<String, isize> = HashMap::new();
-        for i in (0 .. 100) {
-            m.insert(i.to_string(), i);
-        }
-        run_decoder(decoder::IsizeDecoder::new(m.clone()), m)
-    })
-}
-
-fn run_deserializer<
-    D: Deserializer<Error=E>,
-    E: Debug,
-    T: Clone + PartialEq + Debug + Deserialize
->(mut d: D, value: T) {
-    let v: T = Deserialize::deserialize(&mut d).unwrap();
-
-    assert_eq!(value, v);
-}
-
-#[bench]
-fn bench_deserializer_000(b: &mut Bencher) {
-    b.iter(|| {
-        let m: HashMap<String, isize> = HashMap::new();
-        run_deserializer(deserializer::IsizeDeserializer::new(m.clone()), m)
-    })
-}
-
-#[bench]
-fn bench_deserializer_003(b: &mut Bencher) {
-    b.iter(|| {
-        let mut m: HashMap<String, isize> = HashMap::new();
-        for i in (0 .. 3) {
-            m.insert(i.to_string(), i);
-        }
-        run_deserializer(deserializer::IsizeDeserializer::new(m.clone()), m)
-    })
-}
-
-#[bench]
-fn bench_deserializer_100(b: &mut Bencher) {
-    b.iter(|| {
-        let mut m: HashMap<String, isize> = HashMap::new();
-        for i in (0 .. 100) {
-            m.insert(i.to_string(), i);
-        }
-        run_deserializer(deserializer::IsizeDeserializer::new(m.clone()), m)
-    })
-}

benches/bench_struct.rs

@@ -1,745 +0,0 @@
-#![feature(custom_derive, plugin, test)]
-#![plugin(serde_macros)]
-
-extern crate serde;
-extern crate rustc_serialize;
-extern crate test;
-
-use std::collections::HashMap;
-use test::Bencher;
-
-use rustc_serialize::{Decoder, Decodable};
-
-use serde::de::{Deserializer, Deserialize};
-
-//////////////////////////////////////////////////////////////////////////////
-
-#[derive(Clone, PartialEq, Debug, RustcDecodable, Deserialize)]
-pub struct Inner {
-    a: (),
-    b: usize,
-    c: HashMap<String, Option<char>>,
-}
-
-//////////////////////////////////////////////////////////////////////////////
-
-#[derive(Clone, PartialEq, Debug, RustcDecodable, Deserialize)]
-pub struct Outer {
-    inner: Vec<Inner>,
-}
-
-//////////////////////////////////////////////////////////////////////////////
-
-#[derive(Debug, PartialEq)]
-pub enum Error {
-    EndOfStream,
-    SyntaxError,
-    UnexpectedName,
-    ConversionError,
-    MissingField,
-    OtherError,
-}
-
-impl serde::de::Error for Error {
-    fn syntax_error() -> Error { Error::SyntaxError }
-
-    fn end_of_stream_error() -> Error { Error::EndOfStream }
-
-    fn unknown_field_error(_: &str) -> Error { Error::SyntaxError }
-
-    fn missing_field_error(_: &'static str) -> Error {
-        Error::MissingField
-    }
-}
-
-mod decoder {
-    use std::collections::HashMap;
-    use rustc_serialize::Decoder;
-
-    use super::{Outer, Inner, Error};
-
-    use self::State::{
-        OuterState,
-        InnerState,
-        NullState,
-        UsizeState,
-        CharState,
-        StringState,
-        FieldState,
-        VecState,
-        MapState,
-        OptionState,
-    };
-
-    #[derive(Debug)]
-    enum State {
-        OuterState(Outer),
-        InnerState(Inner),
-        NullState,
-        UsizeState(usize),
-        CharState(char),
-        StringState(String),
-        FieldState(&'static str),
-        VecState(Vec<Inner>),
-        MapState(HashMap<String, Option<char>>),
-        OptionState(bool),
-    }
-
-    pub struct OuterDecoder {
-        stack: Vec<State>,
-
-    }
-
-    impl OuterDecoder {
-        #[inline]
-        pub fn new(animal: Outer) -> OuterDecoder {
-            OuterDecoder {
-                stack: vec!(OuterState(animal)),
-            }
-        }
-    }
-
-    impl Decoder for OuterDecoder {
-        type Error = Error;
-
-        fn error(&mut self, _msg: &str) -> Error {
-            Error::OtherError
-        }
-
-        // Primitive types:
-        #[inline]
-        fn read_nil(&mut self) -> Result<(), Error> {
-            match self.stack.pop() {
-                Some(NullState) => Ok(()),
-                _ => Err(Error::SyntaxError),
-            }
-        }
-        #[inline]
-        fn read_usize(&mut self) -> Result<usize, Error> {
-            match self.stack.pop() {
-                Some(UsizeState(value)) => Ok(value),
-                _ => Err(Error::SyntaxError),
-            }
-        }
-        fn read_u64(&mut self) -> Result<u64, Error> { Err(Error::SyntaxError) }
-        fn read_u32(&mut self) -> Result<u32, Error> { Err(Error::SyntaxError) }
-        fn read_u16(&mut self) -> Result<u16, Error> { Err(Error::SyntaxError) }
-        fn read_u8(&mut self) -> Result<u8, Error> { Err(Error::SyntaxError) }
-        fn read_isize(&mut self) -> Result<isize, Error> { Err(Error::SyntaxError) }
-        fn read_i64(&mut self) -> Result<i64, Error> { Err(Error::SyntaxError) }
-        fn read_i32(&mut self) -> Result<i32, Error> { Err(Error::SyntaxError) }
-        fn read_i16(&mut self) -> Result<i16, Error> { Err(Error::SyntaxError) }
-        fn read_i8(&mut self) -> Result<i8, Error> { Err(Error::SyntaxError) }
-        fn read_bool(&mut self) -> Result<bool, Error> { Err(Error::SyntaxError) }
-        fn read_f64(&mut self) -> Result<f64, Error> { Err(Error::SyntaxError) }
-        fn read_f32(&mut self) -> Result<f32, Error> { Err(Error::SyntaxError) }
-        #[inline]
-        fn read_char(&mut self) -> Result<char, Error> {
-            match self.stack.pop() {
-                Some(CharState(c)) => Ok(c),
-                _ => Err(Error::SyntaxError),
-            }
-        }
-        #[inline]
-        fn read_str(&mut self) -> Result<String, Error> {
-            match self.stack.pop() {
-                Some(StringState(value)) => Ok(value),
-                _ => Err(Error::SyntaxError),
-            }
-        }
-
-        // Compound types:
-        fn read_enum<T, F>(&mut self, _name: &str, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut OuterDecoder) -> Result<T, Error>,
-        {
-            Err(Error::SyntaxError)
-        }
-
-        fn read_enum_variant<T, F>(&mut self, _names: &[&str], _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut OuterDecoder, usize) -> Result<T, Error>,
-        {
-            Err(Error::SyntaxError)
-        }
-
-        fn read_enum_variant_arg<T, F>(&mut self, _a_idx: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut OuterDecoder) -> Result<T, Error>,
-        {
-            Err(Error::SyntaxError)
-        }
-
-        fn read_enum_struct_variant<T, F>(&mut self, _names: &[&str], _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut OuterDecoder, usize) -> Result<T, Error>,
-        {
-            Err(Error::SyntaxError)
-        }
-
-        fn read_enum_struct_variant_field<T, F>(&mut self, _f_name: &str, _f_idx: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut OuterDecoder) -> Result<T, Error>,
-        {
-            Err(Error::SyntaxError)
-        }
-
-        #[inline]
-        fn read_struct<T, F>(&mut self, s_name: &str, _len: usize, f: F) -> Result<T, Error> where
-            F: FnOnce(&mut OuterDecoder) -> Result<T, Error>,
-        {
-            match self.stack.pop() {
-                Some(OuterState(Outer { inner })) => {
-                    if s_name == "Outer" {
-                        self.stack.push(VecState(inner));
-                        self.stack.push(FieldState("inner"));
-                        f(self)
-                    } else {
-                        Err(Error::SyntaxError)
-                    }
-                }
-                Some(InnerState(Inner { a: (), b, c })) => {
-                    if s_name == "Inner" {
-                        self.stack.push(MapState(c));
-                        self.stack.push(FieldState("c"));
-
-                        self.stack.push(UsizeState(b));
-                        self.stack.push(FieldState("b"));
-
-                        self.stack.push(NullState);
-                        self.stack.push(FieldState("a"));
-                        f(self)
-                    } else {
-                        Err(Error::SyntaxError)
-                    }
-                }
-                _ => Err(Error::SyntaxError),
-            }
-        }
-        #[inline]
-        fn read_struct_field<T, F>(&mut self, f_name: &str, _f_idx: usize, f: F) -> Result<T, Error> where
-            F: FnOnce(&mut OuterDecoder) -> Result<T, Error>,
-        {
-            match self.stack.pop() {
-                Some(FieldState(name)) => {
-                    if f_name == name {
-                        f(self)
-                    } else {
-                        Err(Error::SyntaxError)
-                    }
-                }
-                _ => Err(Error::SyntaxError)
-            }
-        }
-
-        fn read_tuple<T, F>(&mut self, _len: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut OuterDecoder) -> Result<T, Error>,
-        {
-            Err(Error::SyntaxError)
-        }
-
-        fn read_tuple_arg<T, F>(&mut self, _a_idx: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut OuterDecoder) -> Result<T, Error>,
-        {
-            Err(Error::SyntaxError)
-        }
-
-        fn read_tuple_struct<T, F>(&mut self, _s_name: &str, _len: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut OuterDecoder) -> Result<T, Error>,
-        {
-            Err(Error::SyntaxError)
-        }
-
-        fn read_tuple_struct_arg<T, F>(&mut self, _a_idx: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut OuterDecoder) -> Result<T, Error>,
-        {
-            Err(Error::SyntaxError)
-        }
-
-        // Specialized types:
-        #[inline]
-        fn read_option<T, F>(&mut self, f: F) -> Result<T, Error> where
-            F: FnOnce(&mut OuterDecoder, bool) -> Result<T, Error>,
-        {
-            match self.stack.pop() {
-                Some(OptionState(b)) => f(self, b),
-                _ => Err(Error::SyntaxError),
-            }
-        }
-
-        #[inline]
-        fn read_seq<T, F>(&mut self, f: F) -> Result<T, Error> where
-            F: FnOnce(&mut OuterDecoder, usize) -> Result<T, Error>,
-        {
-            match self.stack.pop() {
-                Some(VecState(value)) => {
-                    let len = value.len();
-                    for inner in value.into_iter().rev() {
-                        self.stack.push(InnerState(inner));
-                    }
-                    f(self, len)
-                }
-                _ => Err(Error::SyntaxError)
-            }
-        }
-        #[inline]
-        fn read_seq_elt<T, F>(&mut self, _idx: usize, f: F) -> Result<T, Error> where
-            F: FnOnce(&mut OuterDecoder) -> Result<T, Error>,
-        {
-            f(self)
-        }
-
-        #[inline]
-        fn read_map<T, F>(&mut self, f: F) -> Result<T, Error> where
-            F: FnOnce(&mut OuterDecoder, usize) -> Result<T, Error>,
-        {
-            match self.stack.pop() {
-                Some(MapState(map)) => {
-                    let len = map.len();
-                    for (key, value) in map {
-                        match value {
-                            Some(c) => {
-                                self.stack.push(CharState(c));
-                                self.stack.push(OptionState(true));
-                            }
-                            None => {
-                                self.stack.push(OptionState(false));
-                            }
-                        }
-                        self.stack.push(StringState(key));
-                    }
-                    f(self, len)
-                }
-                _ => Err(Error::SyntaxError),
-            }
-        }
-        #[inline]
-        fn read_map_elt_key<T, F>(&mut self, _idx: usize, f: F) -> Result<T, Error> where
-            F: FnOnce(&mut OuterDecoder) -> Result<T, Error>,
-        {
-            f(self)
-        }
-
-        #[inline]
-        fn read_map_elt_val<T, F>(&mut self, _idx: usize, f: F) -> Result<T, Error> where
-            F: FnOnce(&mut OuterDecoder) -> Result<T, Error>,
-        {
-            f(self)
-        }
-    }
-}
-
-//////////////////////////////////////////////////////////////////////////////
-
-mod deserializer {
-    use std::collections::HashMap;
-    use std::collections::hash_map;
-    use std::vec;
-    use super::{Outer, Inner};
-    use super::Error;
-    use serde::de;
-
-    #[derive(Debug)]
-    enum State {
-        OuterState(Outer),
-        InnerState(Inner),
-        StrState(&'static str),
-        NullState,
-        UsizeState(usize),
-        CharState(char),
-        StringState(String),
-        OptionState(bool),
-        VecState(Vec<Inner>),
-        MapState(HashMap<String, Option<char>>),
-    }
-
-    pub struct OuterDeserializer {
-        stack: Vec<State>,
-    }
-
-    impl OuterDeserializer {
-        #[inline]
-        pub fn new(outer: Outer) -> OuterDeserializer {
-            OuterDeserializer {
-                stack: vec!(State::OuterState(outer)),
-            }
-        }
-    }
-
-    impl de::Deserializer for OuterDeserializer {
-        type Error = Error;
-
-        fn visit<V>(&mut self, mut visitor: V) -> Result<V::Value, Error>
-            where V: de::Visitor,
-        {
-            match self.stack.pop() {
-                Some(State::VecState(value)) => {
-                    visitor.visit_seq(OuterSeqVisitor {
-                        de: self,
-                        iter: value.into_iter(),
-                    })
-                }
-                Some(State::MapState(value)) => {
-                    visitor.visit_map(MapVisitor {
-                        de: self,
-                        iter: value.into_iter(),
-                    })
-                }
-                Some(State::NullState) => {
-                    visitor.visit_unit()
-                }
-                Some(State::UsizeState(x)) => {
-                    visitor.visit_usize(x)
-                }
-                Some(State::CharState(x)) => {
-                    visitor.visit_char(x)
-                }
-                Some(State::StrState(x)) => {
-                    visitor.visit_str(x)
-                }
-                Some(State::StringState(x)) => {
-                    visitor.visit_string(x)
-                }
-                Some(State::OptionState(false)) => {
-                    visitor.visit_none()
-                }
-                Some(State::OptionState(true)) => {
-                    visitor.visit_some(self)
-                }
-                Some(_) => Err(Error::SyntaxError),
-                None => Err(Error::EndOfStream),
-            }
-        }
-
-        fn visit_named_map<V>(&mut self, name: &str, mut visitor: V) -> Result<V::Value, Error>
-            where V: de::Visitor,
-        {
-            match self.stack.pop() {
-                Some(State::OuterState(Outer { inner })) => {
-                    if name != "Outer" {
-                        return Err(Error::SyntaxError);
-                    }
-
-                    self.stack.push(State::VecState(inner));
-                    self.stack.push(State::StrState("inner"));
-
-                    visitor.visit_map(OuterMapVisitor {
-                        de: self,
-                        state: 0,
-                    })
-                }
-                Some(State::InnerState(Inner { a: (), b, c })) => {
-                    if name != "Inner" {
-                        return Err(Error::SyntaxError);
-                    }
-
-                    self.stack.push(State::MapState(c));
-                    self.stack.push(State::StrState("c"));
-
-                    self.stack.push(State::UsizeState(b));
-                    self.stack.push(State::StrState("b"));
-
-                    self.stack.push(State::NullState);
-                    self.stack.push(State::StrState("a"));
-
-                    visitor.visit_map(InnerMapVisitor {
-                        de: self,
-                        state: 0,
-                    })
-                }
-                _ => {
-                    Err(Error::SyntaxError)
-                }
-            }
-        }
-    }
-
-    struct OuterMapVisitor<'a> {
-        de: &'a mut OuterDeserializer,
-        state: usize,
-    }
-
-    impl<'a> de::MapVisitor for OuterMapVisitor<'a> {
-        type Error = Error;
-
-        fn visit_key<K>(&mut self) -> Result<Option<K>, Error>
-            where K: de::Deserialize,
-        {
-            match self.state {
-                0 => {
-                    self.state += 1;
-                    Ok(Some(try!(de::Deserialize::deserialize(self.de))))
-                }
-                _ => {
-                    Ok(None)
-                }
-            }
-        }
-
-        fn visit_value<V>(&mut self) -> Result<V, Error>
-            where V: de::Deserialize,
-        {
-            de::Deserialize::deserialize(self.de)
-        }
-
-        fn end(&mut self) -> Result<(), Error> {
-            if self.state == 1 {
-                Ok(())
-            } else {
-                Err(Error::SyntaxError)
-            }
-        }
-
-        fn size_hint(&self) -> (usize, Option<usize>) {
-            let len = 1 - self.state;
-            (len, Some(len))
-        }
-    }
-
-    struct OuterSeqVisitor<'a> {
-        de: &'a mut OuterDeserializer,
-        iter: vec::IntoIter<Inner>,
-    }
-
-    impl<'a> de::SeqVisitor for OuterSeqVisitor<'a> {
-        type Error = Error;
-
-        fn visit<T>(&mut self) -> Result<Option<T>, Error>
-            where T: de::Deserialize,
-        {
-            match self.iter.next() {
-                Some(value) => {
-                    self.de.stack.push(State::InnerState(value));
-                    Ok(Some(try!(de::Deserialize::deserialize(self.de))))
-                }
-                None => {
-                    Ok(None)
-                }
-            }
-        }
-
-        fn end(&mut self) -> Result<(), Error> {
-            match self.iter.next() {
-                Some(_) => Err(Error::SyntaxError),
-                None => Ok(()),
-            }
-        }
-
-        fn size_hint(&self) -> (usize, Option<usize>) {
-            self.iter.size_hint()
-        }
-    }
-
-    struct InnerMapVisitor<'a> {
-        de: &'a mut OuterDeserializer,
-        state: usize,
-    }
-
-    impl<'a> de::MapVisitor for InnerMapVisitor<'a> {
-        type Error = Error;
-
-        fn visit_key<K>(&mut self) -> Result<Option<K>, Error>
-            where K: de::Deserialize,
-        {
-            match self.state {
-                0 ... 2 => {
-                    self.state += 1;
-                    Ok(Some(try!(de::Deserialize::deserialize(self.de))))
-                }
-                _ => {
-                    Ok(None)
-                }
-            }
-        }
-
-        fn visit_value<V>(&mut self) -> Result<V, Error>
-            where V: de::Deserialize,
-        {
-            de::Deserialize::deserialize(self.de)
-        }
-
-        fn end(&mut self) -> Result<(), Error> {
-            if self.state == 3 {
-                Ok(())
-            } else {
-                Err(Error::SyntaxError)
-            }
-        }
-
-        fn size_hint(&self) -> (usize, Option<usize>) {
-            let len = 1 - self.state;
-            (len, Some(len))
-        }
-    }
-
-    struct MapVisitor<'a> {
-        de: &'a mut OuterDeserializer,
-        iter: hash_map::IntoIter<String, Option<char>>,
-    }
-
-    impl<'a> de::MapVisitor for MapVisitor<'a> {
-        type Error = Error;
-
-        fn visit_key<K>(&mut self) -> Result<Option<K>, Error>
-            where K: de::Deserialize,
-        {
-            match self.iter.next() {
-                Some((key, Some(value))) => {
-                    self.de.stack.push(State::CharState(value));
-                    self.de.stack.push(State::OptionState(true));
-                    self.de.stack.push(State::StringState(key));
-                    Ok(Some(try!(de::Deserialize::deserialize(self.de))))
-                }
-                Some((key, None)) => {
-                    self.de.stack.push(State::OptionState(false));
-                    self.de.stack.push(State::StringState(key));
-                    Ok(Some(try!(de::Deserialize::deserialize(self.de))))
-                }
-                None => {
-                    Ok(None)
-                }
-            }
-        }
-
-        fn visit_value<V>(&mut self) -> Result<V, Error>
-            where V: de::Deserialize,
-        {
-            de::Deserialize::deserialize(self.de)
-        }
-
-        fn end(&mut self) -> Result<(), Error> {
-            match self.iter.next() {
-                Some(_) => Err(Error::SyntaxError),
-                None => Ok(()),
-            }
-        }
-
-        fn size_hint(&self) -> (usize, Option<usize>) {
-            self.iter.size_hint()
-        }
-    }
-}
-
-#[bench]
-fn bench_decoder_0_0(b: &mut Bencher) {
-    b.iter(|| {
-        let mut map = HashMap::new();
-        map.insert("abc".to_string(), Some('c'));
-
-        let outer = Outer {
-            inner: vec!(),
-        };
-
-        let mut d = decoder::OuterDecoder::new(outer.clone());
-        let value: Result<Outer, Error> = Decodable::decode(&mut d);
-
-        assert_eq!(value, Ok(outer));
-    })
-}
-
-#[bench]
-fn bench_decoder_1_0(b: &mut Bencher) {
-    b.iter(|| {
-        let map = HashMap::new();
-
-        let outer = Outer {
-            inner: vec!(
-                Inner {
-                    a: (),
-                    b: 5,
-                    c: map,
-                },
-            )
-        };
-
-        let mut d = decoder::OuterDecoder::new(outer.clone());
-        let value: Result<Outer, Error> = Decodable::decode(&mut d);
-
-        assert_eq!(value, Ok(outer));
-    })
-}
-
-#[bench]
-fn bench_decoder_1_5(b: &mut Bencher) {
-    b.iter(|| {
-        let mut map = HashMap::new();
-        map.insert("1".to_string(), Some('a'));
-        map.insert("2".to_string(), None);
-        map.insert("3".to_string(), Some('b'));
-        map.insert("4".to_string(), None);
-        map.insert("5".to_string(), Some('c'));
-
-        let outer = Outer {
-            inner: vec!(
-                Inner {
-                    a: (),
-                    b: 5,
-                    c: map,
-                },
-            )
-        };
-
-        let mut d = decoder::OuterDecoder::new(outer.clone());
-        let value: Result<Outer, Error> = Decodable::decode(&mut d);
-
-        assert_eq!(value, Ok(outer));
-    })
-}
-
-#[bench]
-fn bench_deserializer_0_0(b: &mut Bencher) {
-    b.iter(|| {
-        let outer = Outer {
-            inner: vec!(),
-        };
-
-        let mut d = deserializer::OuterDeserializer::new(outer.clone());
-        let value: Result<Outer, Error> = Deserialize::deserialize(&mut d);
-
-        assert_eq!(value, Ok(outer));
-    })
-}
-
-#[bench]
-fn bench_deserializer_1_0(b: &mut Bencher) {
-    b.iter(|| {
-        let map = HashMap::new();
-
-        let outer = Outer {
-            inner: vec!(
-                Inner {
-                    a: (),
-                    b: 5,
-                    c: map,
-                },
-            )
-        };
-
-        let mut d = deserializer::OuterDeserializer::new(outer.clone());
-        let value: Result<Outer, Error> = Deserialize::deserialize(&mut d);
-
-        assert_eq!(value, Ok(outer));
-    })
-}
-
-#[bench]
-fn bench_deserializer_1_5(b: &mut Bencher) {
-    b.iter(|| {
-        let mut map = HashMap::new();
-        map.insert("1".to_string(), Some('a'));
-        map.insert("2".to_string(), None);
-        map.insert("3".to_string(), Some('b'));
-        map.insert("4".to_string(), None);
-        map.insert("5".to_string(), Some('c'));
-
-        let outer = Outer {
-            inner: vec!(
-                Inner {
-                    a: (),
-                    b: 5,
-                    c: map,
-                },
-            )
-        };
-
-        let mut d = deserializer::OuterDeserializer::new(outer.clone());
-        let value: Result<Outer, Error> = Deserialize::deserialize(&mut d);
-
-        assert_eq!(value, Ok(outer));
-    })
-}

benches/bench_vec.rs

@@ -1,617 +0,0 @@
-#![feature(plugin, test)]
-#![plugin(serde_macros)]
-
-extern crate serde;
-extern crate rustc_serialize;
-extern crate test;
-
-use std::fmt::Debug;
-use test::Bencher;
-
-use rustc_serialize::{Decoder, Decodable};
-
-use serde::de::{Deserializer, Deserialize};
-
-//////////////////////////////////////////////////////////////////////////////
-
-#[derive(PartialEq, Debug)]
-pub enum Error {
-    EndOfStreamError,
-    SyntaxError,
-}
-
-impl serde::de::Error for Error {
-    fn syntax_error() -> Error { Error::SyntaxError }
-
-    fn end_of_stream_error() -> Error { Error::EndOfStreamError }
-
-    fn unknown_field_error(_: &str) -> Error { Error::SyntaxError }
-
-    fn missing_field_error(_: &'static str) -> Error { Error::SyntaxError }
-}
-
-//////////////////////////////////////////////////////////////////////////////
-
-mod decoder {
-    use std::vec;
-    use rustc_serialize;
-
-    use super::Error;
-
-    pub struct UsizeDecoder {
-        len: usize,
-        iter: vec::IntoIter<usize>,
-    }
-
-    impl UsizeDecoder {
-        #[inline]
-        pub fn new(values: Vec<usize>) -> UsizeDecoder {
-            UsizeDecoder {
-                len: values.len(),
-                iter: values.into_iter(),
-            }
-        }
-    }
-
-    impl rustc_serialize::Decoder for UsizeDecoder {
-        type Error = Error;
-
-        fn error(&mut self, _: &str) -> Error { Error::SyntaxError }
-
-        // Primitive types:
-        fn read_nil(&mut self) -> Result<(), Error> { Err(Error::SyntaxError) }
-        #[inline]
-        fn read_usize(&mut self) -> Result<usize, Error> {
-            match self.iter.next() {
-                Some(value) => Ok(value),
-                None => Err(Error::EndOfStreamError),
-            }
-        }
-        fn read_u64(&mut self) -> Result<u64, Error> { Err(Error::SyntaxError) }
-        fn read_u32(&mut self) -> Result<u32, Error> { Err(Error::SyntaxError) }
-        fn read_u16(&mut self) -> Result<u16, Error> { Err(Error::SyntaxError) }
-        fn read_u8(&mut self) -> Result<u8, Error> { Err(Error::SyntaxError) }
-        fn read_isize(&mut self) -> Result<isize, Error> { Err(Error::SyntaxError) }
-        fn read_i64(&mut self) -> Result<i64, Error> { Err(Error::SyntaxError) }
-        fn read_i32(&mut self) -> Result<i32, Error> { Err(Error::SyntaxError) }
-        fn read_i16(&mut self) -> Result<i16, Error> { Err(Error::SyntaxError) }
-        fn read_i8(&mut self) -> Result<i8, Error> { Err(Error::SyntaxError) }
-        fn read_bool(&mut self) -> Result<bool, Error> { Err(Error::SyntaxError) }
-        fn read_f64(&mut self) -> Result<f64, Error> { Err(Error::SyntaxError) }
-        fn read_f32(&mut self) -> Result<f32, Error> { Err(Error::SyntaxError) }
-        fn read_char(&mut self) -> Result<char, Error> { Err(Error::SyntaxError) }
-        fn read_str(&mut self) -> Result<String, Error> { Err(Error::SyntaxError) }
-
-        // Compound types:
-        fn read_enum<T, F>(&mut self, _name: &str, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut UsizeDecoder) -> Result<T, Error>,
-        {
-            Err(Error::SyntaxError)
-        }
-
-        fn read_enum_variant<T, F>(&mut self, _names: &[&str], _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut UsizeDecoder, usize) -> Result<T, Error>,
-        {
-            Err(Error::SyntaxError)
-        }
-
-        fn read_enum_variant_arg<T, F>(&mut self, _a_idx: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut UsizeDecoder) -> Result<T, Error>,
-        {
-            Err(Error::SyntaxError)
-        }
-
-        fn read_enum_struct_variant<T, F>(&mut self, _names: &[&str], _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut UsizeDecoder, usize) -> Result<T, Error>,
-        {
-            Err(Error::SyntaxError)
-        }
-
-        fn read_enum_struct_variant_field<T, F>(&mut self, _f_name: &str, _f_idx: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut UsizeDecoder) -> Result<T, Error>,
-        {
-            Err(Error::SyntaxError)
-        }
-
-        fn read_struct<T, F>(&mut self, _s_name: &str, _len: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut UsizeDecoder) -> Result<T, Error>,
-        {
-            Err(Error::SyntaxError)
-        }
-
-        fn read_struct_field<T, F>(&mut self, _f_name: &str, _f_idx: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut UsizeDecoder) -> Result<T, Error>,
-        {
-            Err(Error::SyntaxError)
-        }
-
-        fn read_tuple<T, F>(&mut self, _len: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut UsizeDecoder) -> Result<T, Error>,
-        {
-            Err(Error::SyntaxError)
-        }
-
-        fn read_tuple_arg<T, F>(&mut self, _a_idx: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut UsizeDecoder) -> Result<T, Error>,
-        {
-            Err(Error::SyntaxError)
-        }
-
-        fn read_tuple_struct<T, F>(&mut self, _s_name: &str, _len: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut UsizeDecoder) -> Result<T, Error>,
-        {
-            Err(Error::SyntaxError)
-        }
-
-        fn read_tuple_struct_arg<T, F>(&mut self, _a_idx: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut UsizeDecoder) -> Result<T, Error>,
-        {
-            Err(Error::SyntaxError)
-        }
-
-        // Specialized types:
-        fn read_option<T, F>(&mut self, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut UsizeDecoder, bool) -> Result<T, Error>,
-        {
-            Err(Error::SyntaxError)
-        }
-
-        #[inline]
-        fn read_seq<T, F>(&mut self, f: F) -> Result<T, Error> where
-            F: FnOnce(&mut UsizeDecoder, usize) -> Result<T, Error>,
-        {
-            let len = self.len;
-            f(self, len)
-        }
-        #[inline]
-        fn read_seq_elt<T, F>(&mut self, _idx: usize, f: F) -> Result<T, Error> where
-            F: FnOnce(&mut UsizeDecoder) -> Result<T, Error>,
-        {
-            f(self)
-        }
-
-        fn read_map<T, F>(&mut self, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut UsizeDecoder, usize) -> Result<T, Error>,
-        {
-            Err(Error::SyntaxError)
-        }
-
-        fn read_map_elt_key<T, F>(&mut self, _idx: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut UsizeDecoder) -> Result<T, Error>,
-        {
-            Err(Error::SyntaxError)
-        }
-
-        fn read_map_elt_val<T, F>(&mut self, _idx: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut UsizeDecoder) -> Result<T, Error>,
-        {
-            Err(Error::SyntaxError)
-        }
-    }
-
-
-    pub struct U8Decoder {
-        len: usize,
-        iter: vec::IntoIter<u8>,
-    }
-
-    impl U8Decoder {
-        #[inline]
-        pub fn new(values: Vec<u8>) -> U8Decoder {
-            U8Decoder {
-                len: values.len(),
-                iter: values.into_iter(),
-            }
-        }
-    }
-
-    impl rustc_serialize::Decoder for U8Decoder {
-        type Error = Error;
-
-        fn error(&mut self, _: &str) -> Error { Error::SyntaxError }
-
-        // Primitive types:
-        fn read_nil(&mut self) -> Result<(), Error> { Err(Error::SyntaxError) }
-        fn read_usize(&mut self) -> Result<usize, Error> { Err(Error::SyntaxError) }
-        fn read_u64(&mut self) -> Result<u64, Error> { Err(Error::SyntaxError) }
-        fn read_u32(&mut self) -> Result<u32, Error> { Err(Error::SyntaxError) }
-        fn read_u16(&mut self) -> Result<u16, Error> { Err(Error::SyntaxError) }
-        #[inline]
-        fn read_u8(&mut self) -> Result<u8, Error> {
-            match self.iter.next() {
-                Some(value) => Ok(value),
-                None => Err(Error::EndOfStreamError),
-            }
-        }
-        #[inline]
-        fn read_isize(&mut self) -> Result<isize, Error> { Err(Error::SyntaxError) }
-        fn read_i64(&mut self) -> Result<i64, Error> { Err(Error::SyntaxError) }
-        fn read_i32(&mut self) -> Result<i32, Error> { Err(Error::SyntaxError) }
-        fn read_i16(&mut self) -> Result<i16, Error> { Err(Error::SyntaxError) }
-        fn read_i8(&mut self) -> Result<i8, Error> { Err(Error::SyntaxError) }
-        fn read_bool(&mut self) -> Result<bool, Error> { Err(Error::SyntaxError) }
-        fn read_f64(&mut self) -> Result<f64, Error> { Err(Error::SyntaxError) }
-        fn read_f32(&mut self) -> Result<f32, Error> { Err(Error::SyntaxError) }
-        fn read_char(&mut self) -> Result<char, Error> { Err(Error::SyntaxError) }
-        fn read_str(&mut self) -> Result<String, Error> { Err(Error::SyntaxError) }
-
-        // Compound types:
-        fn read_enum<T, F>(&mut self, _name: &str, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut U8Decoder) -> Result<T, Error>,
-        {
-            Err(Error::SyntaxError)
-        }
-
-        fn read_enum_variant<T, F>(&mut self, _names: &[&str], _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut U8Decoder, usize) -> Result<T, Error>,
-        {
-            Err(Error::SyntaxError)
-        }
-
-        fn read_enum_variant_arg<T, F>(&mut self, _a_idx: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut U8Decoder) -> Result<T, Error>,
-        {
-            Err(Error::SyntaxError)
-        }
-
-        fn read_enum_struct_variant<T, F>(&mut self, _names: &[&str], _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut U8Decoder, usize) -> Result<T, Error>,
-        {
-            Err(Error::SyntaxError)
-        }
-
-        fn read_enum_struct_variant_field<T, F>(&mut self, _f_name: &str, _f_idx: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut U8Decoder) -> Result<T, Error>,
-        {
-            Err(Error::SyntaxError)
-        }
-
-        fn read_struct<T, F>(&mut self, _s_name: &str, _len: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut U8Decoder) -> Result<T, Error>,
-        {
-            Err(Error::SyntaxError)
-        }
-
-        fn read_struct_field<T, F>(&mut self, _f_name: &str, _f_idx: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut U8Decoder) -> Result<T, Error>,
-        {
-            Err(Error::SyntaxError)
-        }
-
-        fn read_tuple<T, F>(&mut self, _len: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut U8Decoder) -> Result<T, Error>,
-        {
-            Err(Error::SyntaxError)
-        }
-
-        fn read_tuple_arg<T, F>(&mut self, _a_idx: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut U8Decoder) -> Result<T, Error>,
-        {
-            Err(Error::SyntaxError)
-        }
-
-        fn read_tuple_struct<T, F>(&mut self, _s_name: &str, _len: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut U8Decoder) -> Result<T, Error>,
-        {
-            Err(Error::SyntaxError)
-        }
-
-        fn read_tuple_struct_arg<T, F>(&mut self, _a_idx: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut U8Decoder) -> Result<T, Error>,
-        {
-            Err(Error::SyntaxError)
-        }
-
-        // Specialized types:
-        fn read_option<T, F>(&mut self, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut U8Decoder, bool) -> Result<T, Error>,
-        {
-            Err(Error::SyntaxError)
-        }
-
-        #[inline]
-        fn read_seq<T, F>(&mut self, f: F) -> Result<T, Error> where
-            F: FnOnce(&mut U8Decoder, usize) -> Result<T, Error>,
-        {
-            let len = self.len;
-            f(self, len)
-        }
-        #[inline]
-        fn read_seq_elt<T, F>(&mut self, _idx: usize, f: F) -> Result<T, Error> where
-            F: FnOnce(&mut U8Decoder) -> Result<T, Error>,
-        {
-            f(self)
-        }
-
-        fn read_map<T, F>(&mut self, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut U8Decoder, usize) -> Result<T, Error>,
-        {
-            Err(Error::SyntaxError)
-        }
-
-        fn read_map_elt_key<T, F>(&mut self, _idx: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut U8Decoder) -> Result<T, Error>,
-        {
-            Err(Error::SyntaxError)
-        }
-
-        fn read_map_elt_val<T, F>(&mut self, _idx: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut U8Decoder) -> Result<T, Error>,
-        {
-            Err(Error::SyntaxError)
-        }
-    }
-}
-
-//////////////////////////////////////////////////////////////////////////////
-
-mod deserializer {
-    //use std::num;
-    use std::vec;
-
-    use super::Error;
-
-    use serde::de;
-
-    #[derive(PartialEq, Debug)]
-    enum State {
-        StartState,
-        SepOrEndState,
-        EndState,
-    }
-
-    pub struct Deserializer<A> {
-        state: State,
-        iter: vec::IntoIter<A>,
-        len: usize,
-        value: Option<A>,
-    }
-
-    impl<A> Deserializer<A> {
-        #[inline]
-        pub fn new(values: Vec<A>) -> Deserializer<A> {
-            let len = values.len();
-            Deserializer {
-                state: State::StartState,
-                iter: values.into_iter(),
-                len: len,
-                value: None,
-            }
-        }
-    }
-
-    impl de::Deserializer for Deserializer<usize> {
-        type Error = Error;
-
-        #[inline]
-        fn visit<V>(&mut self, mut visitor: V) -> Result<V::Value, Error>
-            where V: de::Visitor,
-        {
-            match self.state {
-                State::StartState => {
-                    self.state = State::SepOrEndState;
-                    visitor.visit_seq(self)
-                }
-                State::SepOrEndState => {
-                    visitor.visit_usize(self.value.take().unwrap())
-                }
-                State::EndState => {
-                    Err(Error::EndOfStreamError)
-                }
-            }
-        }
-    }
-
-    impl de::SeqVisitor for Deserializer<usize> {
-        type Error = Error;
-
-        #[inline]
-        fn visit<T>(&mut self) -> Result<Option<T>, Error>
-            where T: de::Deserialize,
-        {
-            match self.iter.next() {
-                Some(value) => {
-                    self.len -= 1;
-                    self.value = Some(value);
-                    Ok(Some(try!(de::Deserialize::deserialize(self))))
-                }
-                None => {
-                    self.state = State::EndState;
-                    Ok(None)
-                }
-            }
-        }
-
-        #[inline]
-        fn end(&mut self) -> Result<(), Error> {
-            match self.iter.next() {
-                Some(_) => Err(Error::SyntaxError),
-                None => {
-                    self.state = State::EndState;
-                    Ok(())
-                }
-            }
-        }
-
-        #[inline]
-        fn size_hint(&self) -> (usize, Option<usize>) {
-            (self.len, Some(self.len))
-        }
-    }
-
-    impl de::Deserializer for Deserializer<u8> {
-        type Error = Error;
-
-        #[inline]
-        fn visit<V>(&mut self, mut visitor: V) -> Result<V::Value, Error>
-            where V: de::Visitor,
-        {
-            match self.state {
-                State::StartState => {
-                    self.state = State::SepOrEndState;
-                    visitor.visit_seq(self)
-                }
-                State::SepOrEndState => {
-                    visitor.visit_u8(self.value.take().unwrap())
-                }
-                State::EndState => {
-                    Err(Error::EndOfStreamError)
-                }
-            }
-        }
-    }
-
-    impl de::SeqVisitor for Deserializer<u8> {
-        type Error = Error;
-
-        #[inline]
-        fn visit<T>(&mut self) -> Result<Option<T>, Error>
-            where T: de::Deserialize,
-        {
-            match self.iter.next() {
-                Some(value) => {
-                    self.len -= 1;
-                    self.value = Some(value);
-                    Ok(Some(try!(de::Deserialize::deserialize(self))))
-                }
-                None => {
-                    self.state = State::EndState;
-                    Ok(None)
-                }
-            }
-        }
-
-        #[inline]
-        fn end(&mut self) -> Result<(), Error> {
-            match self.iter.next() {
-                Some(_) => Err(Error::SyntaxError),
-                None => {
-                    self.state = State::EndState;
-                    Ok(())
-                }
-            }
-        }
-
-        #[inline]
-        fn size_hint(&self) -> (usize, Option<usize>) {
-            (self.len, Some(self.len))
-        }
-    }
-}
-
-//////////////////////////////////////////////////////////////////////////////
-
-fn run_decoder<
-    D: Decoder<Error=Error>,
-    T: Clone + PartialEq + Debug + Decodable
->(mut d: D, value: T) {
-    let v = Decodable::decode(&mut d);
-
-    assert_eq!(Ok(value), v);
-}
-
-fn run_deserializer<
-    D: Deserializer<Error=E>,
-    E: Debug,
-    T: Clone + PartialEq + Debug + Deserialize
->(mut d: D, value: T) {
-    let v: T = Deserialize::deserialize(&mut d).unwrap();
-
-    assert_eq!(value, v);
-}
-
-#[bench]
-fn bench_decoder_usize_000(b: &mut Bencher) {
-    b.iter(|| {
-        let v: Vec<usize> = vec!();
-        run_decoder(decoder::UsizeDecoder::new(v.clone()), v)
-    })
-}
-
-#[bench]
-fn bench_decoder_usize_003(b: &mut Bencher) {
-    b.iter(|| {
-        let v: Vec<usize> = vec!(1, 2, 3);
-        run_decoder(decoder::UsizeDecoder::new(v.clone()), v)
-    })
-}
-
-#[bench]
-fn bench_decoder_usize_100(b: &mut Bencher) {
-    b.iter(|| {
-        let v: Vec<usize> = (0 .. 100).collect();
-        run_decoder(decoder::UsizeDecoder::new(v.clone()), v)
-    })
-}
-
-#[bench]
-fn bench_decoder_u8_000(b: &mut Bencher) {
-    b.iter(|| {
-        let v: Vec<u8> = vec!();
-        run_decoder(decoder::U8Decoder::new(v.clone()), v)
-    })
-}
-
-#[bench]
-fn bench_decoder_u8_003(b: &mut Bencher) {
-    b.iter(|| {
-        let v: Vec<u8> = vec!(1, 2, 3);
-        run_decoder(decoder::U8Decoder::new(v.clone()), v)
-    })
-}
-
-#[bench]
-fn bench_decoder_u8_100(b: &mut Bencher) {
-    b.iter(|| {
-        let v: Vec<u8> = (0 .. 100).collect();
-        run_decoder(decoder::U8Decoder::new(v.clone()), v)
-    })
-}
-
-#[bench]
-fn bench_deserializer_usize_000(b: &mut Bencher) {
-    b.iter(|| {
-        let v: Vec<usize> = vec!();
-        run_deserializer(deserializer::Deserializer::new(v.clone()), v)
-    })
-}
-
-#[bench]
-fn bench_deserializer_usize_003(b: &mut Bencher) {
-    b.iter(|| {
-        let v: Vec<usize> = vec!(1, 2, 3);
-        run_deserializer(deserializer::Deserializer::new(v.clone()), v)
-    })
-}
-
-#[bench]
-fn bench_deserializer_usize_100(b: &mut Bencher) {
-    b.iter(|| {
-        let v: Vec<usize> = (0 .. 100).collect();
-        run_deserializer(deserializer::Deserializer::new(v.clone()), v)
-    })
-}
-
-#[bench]
-fn bench_deserializer_u8_000(b: &mut Bencher) {
-    b.iter(|| {
-        let v: Vec<u8> = vec!();
-        run_deserializer(deserializer::Deserializer::new(v.clone()), v)
-    })
-}
-
-#[bench]
-fn bench_deserializer_u8_003(b: &mut Bencher) {
-    b.iter(|| {
-        let v: Vec<u8> = vec!(1, 2, 3);
-        run_deserializer(deserializer::Deserializer::new(v.clone()), v)
-    })
-}
-
-#[bench]
-fn bench_deserializer_u8_100(b: &mut Bencher) {
-    b.iter(|| {
-        let v: Vec<u8> = (0 .. 100).collect();
-        run_deserializer(deserializer::Deserializer::new(v.clone()), v)
-    })
-}

crates-io.md

@@ -0,0 +1,52 @@
+<!-- Serde readme rendered on crates.io -->
+
+**Serde is a framework for *ser*ializing and *de*serializing Rust data structures efficiently and generically.**
+
+---
+
+You may be looking for:
+
+- [An overview of Serde](https://serde.rs/)
+- [Data formats supported by Serde](https://serde.rs/#data-formats)
+- [Setting up `#[derive(Serialize, Deserialize)]`](https://serde.rs/derive.html)
+- [Examples](https://serde.rs/examples.html)
+- [API documentation](https://docs.serde.rs/serde/)
+- [Release notes](https://github.com/serde-rs/serde/releases)
+
+## Serde in action
+
+```rust
+use serde::{Serialize, Deserialize};
+
+#[derive(Serialize, Deserialize, Debug)]
+struct Point {
+    x: i32,
+    y: i32,
+}
+
+fn main() {
+    let point = Point { x: 1, y: 2 };
+
+    // Convert the Point to a JSON string.
+    let serialized = serde_json::to_string(&point).unwrap();
+
+    // Prints serialized = {"x":1,"y":2}
+    println!("serialized = {}", serialized);
+
+    // Convert the JSON string back to a Point.
+    let deserialized: Point = serde_json::from_str(&serialized).unwrap();
+
+    // Prints deserialized = Point { x: 1, y: 2 }
+    println!("deserialized = {:?}", deserialized);
+}
+```
+
+## Getting help
+
+Serde developers live in the #serde channel on [`irc.mozilla.org`][irc]. The
+\#rust channel is also a good resource with generally faster response time but
+less specific knowledge about Serde. If IRC is not your thing or you don't get a
+good response, we are happy to respond to [GitHub issues][issues] as well.
+
+[irc]: https://wiki.mozilla.org/IRC
+[issues]: https://github.com/serde-rs/serde/issues/new/choose

examples/json.rs

@@ -1,64 +0,0 @@
-#![feature(custom_derive, plugin)]
-#![plugin(serde_macros)]
-
-extern crate serde;
-
-use std::collections::BTreeMap;
-use serde::json;
-
-// Creating serializable types with serde is quite simple with `serde_macros`. It implements a
-// syntax extension that automatically generates the necessary serde trait implementations.
-#[derive(Debug, Serialize, Deserialize)]
-struct Point {
-    x: i32,
-    y: i32,
-}
-
-fn main() {
-    let point = Point { x: 5, y: 6 };
-
-    // Serializing to JSON is pretty simple by using the `to_string` method:
-    let serialized_point = json::to_string(&point).unwrap();
-
-    println!("{}", serialized_point);
-    // prints:
-    //
-    // {"x":5,"y":6}
-
-    // There is also support for pretty printing using `to_string_pretty`:
-    let serialized_point = json::to_string_pretty(&point).unwrap();
-
-    println!("{}", serialized_point);
-    // prints:
-    //
-    // {
-    //   "x":5,
-    //   "y":6
-    // }
-
-    // Values can also be deserialized with the same style using `from_str`:
-    let deserialized_point: Point = json::from_str(&serialized_point).unwrap();
-
-    println!("{:?}", deserialized_point);
-    // prints:
-    //
-    // Point { x: 5, y: 6 }
-
-    // `Point`s aren't the only type that can be serialized to. Because `Point` members have the
-    // same type, they can be also serialized into a map. Also, 
-    let deserialized_map: BTreeMap<String, i64> = json::from_str(&serialized_point).unwrap();
-
-    println!("{:?}", deserialized_map);
-    // prints:
-    //
-    // {"x": 5, "y": 6}
-
-    // If you need to accept arbitrary data, you can also deserialize into `json::Value`, which
-    // can represent all JSON values.
-    let deserialized_value: json::Value = json::from_str(&serialized_point).unwrap();
-
-    println!("{:?}", deserialized_value);
-    // prints:
-    //
-    // {"x":5,"y":6}
-}

rustfmt.toml

@@ -0,0 +1 @@
+error_on_line_overflow = false

serde/Cargo.toml

@@ -0,0 +1,56 @@
+[package]
+name = "serde"
+version = "1.0.100" # remember to update html_root_url
+authors = ["Erick Tryzelaar <erick.tryzelaar@gmail.com>", "David Tolnay <dtolnay@gmail.com>"]
+license = "MIT OR Apache-2.0"
+description = "A generic serialization/deserialization framework"
+homepage = "https://serde.rs"
+repository = "https://github.com/serde-rs/serde"
+documentation = "https://docs.serde.rs/serde/"
+keywords = ["serde", "serialization", "no_std"]
+categories = ["encoding"]
+readme = "crates-io.md"
+include = ["Cargo.toml", "build.rs", "src/**/*.rs", "crates-io.md", "README.md", "LICENSE-APACHE", "LICENSE-MIT"]
+build = "build.rs"
+
+[badges]
+travis-ci = { repository = "serde-rs/serde" }
+appveyor = { repository = "serde-rs/serde" }
+
+[dependencies]
+serde_derive = { version = "1.0", optional = true, path = "../serde_derive" }
+
+[dev-dependencies]
+serde_derive = { version = "1.0", path = "../serde_derive" }
+
+[package.metadata.playground]
+features = ["derive", "rc"]
+
+
+### FEATURES #################################################################
+
+[features]
+default = ["std"]
+
+# Provide derive(Serialize, Deserialize) macros.
+derive = ["serde_derive"]
+
+# Provide impls for common standard library types like Vec<T> and HashMap<K, V>.
+# Requires a dependency on the Rust standard library.
+std = []
+
+# Provide impls for types that require unstable functionality. For tracking and
+# discussion of unstable functionality please refer to this issue:
+#
+#    https://github.com/serde-rs/serde/issues/812
+unstable = []
+
+# Provide impls for types in the Rust core allocation and collections library
+# including String, Box<T>, Vec<T>, and Cow<T>. This is a subset of std but may
+# be enabled without depending on all of std.
+alloc = []
+
+# Opt into impls for Rc<T> and Arc<T>. Serializing and deserializing these types
+# does not preserve identity and may result in multiple copies of the same data.
+# Be sure that this is what you want before enabling this feature.
+rc = []

serde/LICENSE-APACHE

@@ -0,0 +1 @@
+../LICENSE-APACHE

serde/LICENSE-MIT

@@ -0,0 +1 @@
+../LICENSE-MIT

serde/README.md

@@ -0,0 +1 @@
+../README.md

serde/build.rs

@@ -0,0 +1,125 @@
+use std::env;
+use std::process::Command;
+use std::str::{self, FromStr};
+
+// The rustc-cfg strings below are *not* public API. Please let us know by
+// opening a GitHub issue if your build environment requires some way to enable
+// these cfgs other than by executing our build script.
+fn main() {
+    let minor = match rustc_minor_version() {
+        Some(minor) => minor,
+        None => return,
+    };
+
+    let target = env::var("TARGET").unwrap();
+    let emscripten = target == "asmjs-unknown-emscripten" || target == "wasm32-unknown-emscripten";
+
+    // std::collections::Bound was stabilized in Rust 1.17
+    // but it was moved to core::ops later in Rust 1.26:
+    // https://doc.rust-lang.org/core/ops/enum.Bound.html
+    if minor >= 26 {
+        println!("cargo:rustc-cfg=ops_bound");
+    } else if minor >= 17 && cfg!(feature = "std") {
+        println!("cargo:rustc-cfg=collections_bound");
+    }
+
+    // core::cmp::Reverse stabilized in Rust 1.19:
+    // https://doc.rust-lang.org/stable/core/cmp/struct.Reverse.html
+    if minor >= 19 {
+        println!("cargo:rustc-cfg=core_reverse");
+    }
+
+    // CString::into_boxed_c_str stabilized in Rust 1.20:
+    // https://doc.rust-lang.org/std/ffi/struct.CString.html#method.into_boxed_c_str
+    if minor >= 20 {
+        println!("cargo:rustc-cfg=de_boxed_c_str");
+    }
+
+    // From<Box<T>> for Rc<T> / Arc<T> stabilized in Rust 1.21:
+    // https://doc.rust-lang.org/std/rc/struct.Rc.html#impl-From<Box<T>>
+    // https://doc.rust-lang.org/std/sync/struct.Arc.html#impl-From<Box<T>>
+    if minor >= 21 {
+        println!("cargo:rustc-cfg=de_rc_dst");
+    }
+
+    // Duration available in core since Rust 1.25:
+    // https://blog.rust-lang.org/2018/03/29/Rust-1.25.html#library-stabilizations
+    if minor >= 25 {
+        println!("cargo:rustc-cfg=core_duration");
+    }
+
+    // 128-bit integers stabilized in Rust 1.26:
+    // https://blog.rust-lang.org/2018/05/10/Rust-1.26.html
+    //
+    // Disabled on Emscripten targets as Emscripten doesn't
+    // currently support integers larger than 64 bits.
+    if minor >= 26 && !emscripten {
+        println!("cargo:rustc-cfg=integer128");
+    }
+
+    // Inclusive ranges methods stabilized in Rust 1.27:
+    // https://github.com/rust-lang/rust/pull/50758
+    if minor >= 27 {
+        println!("cargo:rustc-cfg=range_inclusive");
+    }
+
+    // Non-zero integers stabilized in Rust 1.28:
+    // https://github.com/rust-lang/rust/pull/50808
+    if minor >= 28 {
+        println!("cargo:rustc-cfg=num_nonzero");
+    }
+
+    // TryFrom, Atomic types, and non-zero signed integers stabilized in Rust 1.34:
+    // https://blog.rust-lang.org/2019/04/11/Rust-1.34.0.html#tryfrom-and-tryinto
+    // https://blog.rust-lang.org/2019/04/11/Rust-1.34.0.html#library-stabilizations
+    if minor >= 34 {
+        println!("cargo:rustc-cfg=core_try_from");
+        println!("cargo:rustc-cfg=num_nonzero_signed");
+
+        // Whitelist of archs that support std::sync::atomic module. Ideally we
+        // would use #[cfg(target_has_atomic = "...")] but it is not stable yet.
+        // Instead this is based on rustc's src/librustc_target/spec/*.rs.
+        let has_atomic64 = target.starts_with("x86_64")
+            || target.starts_with("i686")
+            || target.starts_with("aarch64")
+            || target.starts_with("powerpc64")
+            || target.starts_with("sparc64")
+            || target.starts_with("mips64el");
+        let has_atomic32 = has_atomic64 || emscripten;
+        if has_atomic64 {
+            println!("cargo:rustc-cfg=std_atomic64");
+        }
+        if has_atomic32 {
+            println!("cargo:rustc-cfg=std_atomic");
+        }
+    }
+}
+
+fn rustc_minor_version() -> Option<u32> {
+    let rustc = match env::var_os("RUSTC") {
+        Some(rustc) => rustc,
+        None => return None,
+    };
+
+    let output = match Command::new(rustc).arg("--version").output() {
+        Ok(output) => output,
+        Err(_) => return None,
+    };
+
+    let version = match str::from_utf8(&output.stdout) {
+        Ok(version) => version,
+        Err(_) => return None,
+    };
+
+    let mut pieces = version.split('.');
+    if pieces.next() != Some("rustc 1") {
+        return None;
+    }
+
+    let next = match pieces.next() {
+        Some(next) => next,
+        None => return None,
+    };
+
+    u32::from_str(next).ok()
+}

serde/crates-io.md

@@ -0,0 +1 @@
+../crates-io.md

serde/src/de/from_primitive.rs

@@ -0,0 +1,260 @@
+use lib::*;
+
+macro_rules! int_to_int {
+    ($dst:ident, $n:ident) => {
+        if $dst::min_value() as i64 <= $n as i64 && $n as i64 <= $dst::max_value() as i64 {
+            Some($n as $dst)
+        } else {
+            None
+        }
+    };
+}
+
+macro_rules! int_to_uint {
+    ($dst:ident, $n:ident) => {
+        if 0 <= $n && $n as u64 <= $dst::max_value() as u64 {
+            Some($n as $dst)
+        } else {
+            None
+        }
+    };
+}
+
+macro_rules! uint_to {
+    ($dst:ident, $n:ident) => {
+        if $n as u64 <= $dst::max_value() as u64 {
+            Some($n as $dst)
+        } else {
+            None
+        }
+    };
+}
+
+pub trait FromPrimitive: Sized {
+    fn from_i8(n: i8) -> Option<Self>;
+    fn from_i16(n: i16) -> Option<Self>;
+    fn from_i32(n: i32) -> Option<Self>;
+    fn from_i64(n: i64) -> Option<Self>;
+    fn from_u8(n: u8) -> Option<Self>;
+    fn from_u16(n: u16) -> Option<Self>;
+    fn from_u32(n: u32) -> Option<Self>;
+    fn from_u64(n: u64) -> Option<Self>;
+}
+
+macro_rules! impl_from_primitive_for_int {
+    ($t:ident) => {
+        impl FromPrimitive for $t {
+            #[inline]
+            fn from_i8(n: i8) -> Option<Self> {
+                int_to_int!($t, n)
+            }
+            #[inline]
+            fn from_i16(n: i16) -> Option<Self> {
+                int_to_int!($t, n)
+            }
+            #[inline]
+            fn from_i32(n: i32) -> Option<Self> {
+                int_to_int!($t, n)
+            }
+            #[inline]
+            fn from_i64(n: i64) -> Option<Self> {
+                int_to_int!($t, n)
+            }
+            #[inline]
+            fn from_u8(n: u8) -> Option<Self> {
+                uint_to!($t, n)
+            }
+            #[inline]
+            fn from_u16(n: u16) -> Option<Self> {
+                uint_to!($t, n)
+            }
+            #[inline]
+            fn from_u32(n: u32) -> Option<Self> {
+                uint_to!($t, n)
+            }
+            #[inline]
+            fn from_u64(n: u64) -> Option<Self> {
+                uint_to!($t, n)
+            }
+        }
+    };
+}
+
+macro_rules! impl_from_primitive_for_uint {
+    ($t:ident) => {
+        impl FromPrimitive for $t {
+            #[inline]
+            fn from_i8(n: i8) -> Option<Self> {
+                int_to_uint!($t, n)
+            }
+            #[inline]
+            fn from_i16(n: i16) -> Option<Self> {
+                int_to_uint!($t, n)
+            }
+            #[inline]
+            fn from_i32(n: i32) -> Option<Self> {
+                int_to_uint!($t, n)
+            }
+            #[inline]
+            fn from_i64(n: i64) -> Option<Self> {
+                int_to_uint!($t, n)
+            }
+            #[inline]
+            fn from_u8(n: u8) -> Option<Self> {
+                uint_to!($t, n)
+            }
+            #[inline]
+            fn from_u16(n: u16) -> Option<Self> {
+                uint_to!($t, n)
+            }
+            #[inline]
+            fn from_u32(n: u32) -> Option<Self> {
+                uint_to!($t, n)
+            }
+            #[inline]
+            fn from_u64(n: u64) -> Option<Self> {
+                uint_to!($t, n)
+            }
+        }
+    };
+}
+
+macro_rules! impl_from_primitive_for_float {
+    ($t:ident) => {
+        impl FromPrimitive for $t {
+            #[inline]
+            fn from_i8(n: i8) -> Option<Self> {
+                Some(n as Self)
+            }
+            #[inline]
+            fn from_i16(n: i16) -> Option<Self> {
+                Some(n as Self)
+            }
+            #[inline]
+            fn from_i32(n: i32) -> Option<Self> {
+                Some(n as Self)
+            }
+            #[inline]
+            fn from_i64(n: i64) -> Option<Self> {
+                Some(n as Self)
+            }
+            #[inline]
+            fn from_u8(n: u8) -> Option<Self> {
+                Some(n as Self)
+            }
+            #[inline]
+            fn from_u16(n: u16) -> Option<Self> {
+                Some(n as Self)
+            }
+            #[inline]
+            fn from_u32(n: u32) -> Option<Self> {
+                Some(n as Self)
+            }
+            #[inline]
+            fn from_u64(n: u64) -> Option<Self> {
+                Some(n as Self)
+            }
+        }
+    };
+}
+
+impl_from_primitive_for_int!(isize);
+impl_from_primitive_for_int!(i8);
+impl_from_primitive_for_int!(i16);
+impl_from_primitive_for_int!(i32);
+impl_from_primitive_for_int!(i64);
+impl_from_primitive_for_uint!(usize);
+impl_from_primitive_for_uint!(u8);
+impl_from_primitive_for_uint!(u16);
+impl_from_primitive_for_uint!(u32);
+impl_from_primitive_for_uint!(u64);
+impl_from_primitive_for_float!(f32);
+impl_from_primitive_for_float!(f64);
+
+serde_if_integer128! {
+    impl FromPrimitive for i128 {
+        #[inline]
+        fn from_i8(n: i8) -> Option<Self> {
+            Some(n as i128)
+        }
+        #[inline]
+        fn from_i16(n: i16) -> Option<Self> {
+            Some(n as i128)
+        }
+        #[inline]
+        fn from_i32(n: i32) -> Option<Self> {
+            Some(n as i128)
+        }
+        #[inline]
+        fn from_i64(n: i64) -> Option<Self> {
+            Some(n as i128)
+        }
+        #[inline]
+        fn from_u8(n: u8) -> Option<Self> {
+            Some(n as i128)
+        }
+        #[inline]
+        fn from_u16(n: u16) -> Option<Self> {
+            Some(n as i128)
+        }
+        #[inline]
+        fn from_u32(n: u32) -> Option<Self> {
+            Some(n as i128)
+        }
+        #[inline]
+        fn from_u64(n: u64) -> Option<Self> {
+            Some(n as i128)
+        }
+    }
+
+    impl FromPrimitive for u128 {
+        #[inline]
+        fn from_i8(n: i8) -> Option<Self> {
+            if n >= 0 {
+                Some(n as u128)
+            } else {
+                None
+            }
+        }
+        #[inline]
+        fn from_i16(n: i16) -> Option<Self> {
+            if n >= 0 {
+                Some(n as u128)
+            } else {
+                None
+            }
+        }
+        #[inline]
+        fn from_i32(n: i32) -> Option<Self> {
+            if n >= 0 {
+                Some(n as u128)
+            } else {
+                None
+            }
+        }
+        #[inline]
+        fn from_i64(n: i64) -> Option<Self> {
+            if n >= 0 {
+                Some(n as u128)
+            } else {
+                None
+            }
+        }
+        #[inline]
+        fn from_u8(n: u8) -> Option<Self> {
+            Some(n as u128)
+        }
+        #[inline]
+        fn from_u16(n: u16) -> Option<Self> {
+            Some(n as u128)
+        }
+        #[inline]
+        fn from_u32(n: u32) -> Option<Self> {
+            Some(n as u128)
+        }
+        #[inline]
+        fn from_u64(n: u64) -> Option<Self> {
+            Some(n as u128)
+        }
+    }
+}

serde/src/de/ignored_any.rs

@@ -0,0 +1,227 @@
+use lib::*;
+
+use de::{
+    Deserialize, Deserializer, EnumAccess, Error, MapAccess, SeqAccess, VariantAccess, Visitor,
+};
+
+/// An efficient way of discarding data from a deserializer.
+///
+/// Think of this like `serde_json::Value` in that it can be deserialized from
+/// any type, except that it does not store any information about the data that
+/// gets deserialized.
+///
+/// ```edition2018
+/// use std::fmt;
+/// use std::marker::PhantomData;
+///
+/// use serde::de::{
+///     self, Deserialize, DeserializeSeed, Deserializer, IgnoredAny, SeqAccess, Visitor,
+/// };
+///
+/// /// A seed that can be used to deserialize only the `n`th element of a sequence
+/// /// while efficiently discarding elements of any type before or after index `n`.
+/// ///
+/// /// For example to deserialize only the element at index 3:
+/// ///
+/// /// ```
+/// /// NthElement::new(3).deserialize(deserializer)
+/// /// ```
+/// pub struct NthElement<T> {
+///     n: usize,
+///     marker: PhantomData<T>,
+/// }
+///
+/// impl<T> NthElement<T> {
+///     pub fn new(n: usize) -> Self {
+///         NthElement {
+///             n: n,
+///             marker: PhantomData,
+///         }
+///     }
+/// }
+///
+/// impl<'de, T> Visitor<'de> for NthElement<T>
+/// where
+///     T: Deserialize<'de>,
+/// {
+///     type Value = T;
+///
+///     fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+///         write!(
+///             formatter,
+///             "a sequence in which we care about element {}",
+///             self.n
+///         )
+///     }
+///
+///     fn visit_seq<A>(self, mut seq: A) -> Result<Self::Value, A::Error>
+///     where
+///         A: SeqAccess<'de>,
+///     {
+///         // Skip over the first `n` elements.
+///         for i in 0..self.n {
+///             // It is an error if the sequence ends before we get to element `n`.
+///             if seq.next_element::<IgnoredAny>()?.is_none() {
+///                 return Err(de::Error::invalid_length(i, &self));
+///             }
+///         }
+///
+///         // Deserialize the one we care about.
+///         let nth = match seq.next_element()? {
+///             Some(nth) => nth,
+///             None => {
+///                 return Err(de::Error::invalid_length(self.n, &self));
+///             }
+///         };
+///
+///         // Skip over any remaining elements in the sequence after `n`.
+///         while let Some(IgnoredAny) = seq.next_element()? {
+///             // ignore
+///         }
+///
+///         Ok(nth)
+///     }
+/// }
+///
+/// impl<'de, T> DeserializeSeed<'de> for NthElement<T>
+/// where
+///     T: Deserialize<'de>,
+/// {
+///     type Value = T;
+///
+///     fn deserialize<D>(self, deserializer: D) -> Result<Self::Value, D::Error>
+///     where
+///         D: Deserializer<'de>,
+///     {
+///         deserializer.deserialize_seq(self)
+///     }
+/// }
+///
+/// # fn example<'de, D>(deserializer: D) -> Result<(), D::Error>
+/// # where
+/// #     D: Deserializer<'de>,
+/// # {
+/// // Deserialize only the sequence element at index 3 from this deserializer.
+/// // The element at index 3 is required to be a string. Elements before and
+/// // after index 3 are allowed to be of any type.
+/// let s: String = NthElement::new(3).deserialize(deserializer)?;
+/// #     Ok(())
+/// # }
+/// ```
+#[derive(Copy, Clone, Debug, Default)]
+pub struct IgnoredAny;
+
+impl<'de> Visitor<'de> for IgnoredAny {
+    type Value = IgnoredAny;
+
+    fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+        formatter.write_str("anything at all")
+    }
+
+    #[inline]
+    fn visit_bool<E>(self, x: bool) -> Result<Self::Value, E> {
+        let _ = x;
+        Ok(IgnoredAny)
+    }
+
+    #[inline]
+    fn visit_i64<E>(self, x: i64) -> Result<Self::Value, E> {
+        let _ = x;
+        Ok(IgnoredAny)
+    }
+
+    #[inline]
+    fn visit_u64<E>(self, x: u64) -> Result<Self::Value, E> {
+        let _ = x;
+        Ok(IgnoredAny)
+    }
+
+    #[inline]
+    fn visit_f64<E>(self, x: f64) -> Result<Self::Value, E> {
+        let _ = x;
+        Ok(IgnoredAny)
+    }
+
+    #[inline]
+    fn visit_str<E>(self, s: &str) -> Result<Self::Value, E>
+    where
+        E: Error,
+    {
+        let _ = s;
+        Ok(IgnoredAny)
+    }
+
+    #[inline]
+    fn visit_none<E>(self) -> Result<Self::Value, E> {
+        Ok(IgnoredAny)
+    }
+
+    #[inline]
+    fn visit_some<D>(self, deserializer: D) -> Result<Self::Value, D::Error>
+    where
+        D: Deserializer<'de>,
+    {
+        IgnoredAny::deserialize(deserializer)
+    }
+
+    #[inline]
+    fn visit_newtype_struct<D>(self, deserializer: D) -> Result<Self::Value, D::Error>
+    where
+        D: Deserializer<'de>,
+    {
+        IgnoredAny::deserialize(deserializer)
+    }
+
+    #[inline]
+    fn visit_unit<E>(self) -> Result<Self::Value, E> {
+        Ok(IgnoredAny)
+    }
+
+    #[inline]
+    fn visit_seq<A>(self, mut seq: A) -> Result<Self::Value, A::Error>
+    where
+        A: SeqAccess<'de>,
+    {
+        while let Some(IgnoredAny) = try!(seq.next_element()) {
+            // Gobble
+        }
+        Ok(IgnoredAny)
+    }
+
+    #[inline]
+    fn visit_map<A>(self, mut map: A) -> Result<Self::Value, A::Error>
+    where
+        A: MapAccess<'de>,
+    {
+        while let Some((IgnoredAny, IgnoredAny)) = try!(map.next_entry()) {
+            // Gobble
+        }
+        Ok(IgnoredAny)
+    }
+
+    #[inline]
+    fn visit_bytes<E>(self, bytes: &[u8]) -> Result<Self::Value, E>
+    where
+        E: Error,
+    {
+        let _ = bytes;
+        Ok(IgnoredAny)
+    }
+
+    fn visit_enum<A>(self, data: A) -> Result<Self::Value, A::Error>
+    where
+        A: EnumAccess<'de>,
+    {
+        data.variant::<IgnoredAny>()?.1.newtype_variant()
+    }
+}
+
+impl<'de> Deserialize<'de> for IgnoredAny {
+    #[inline]
+    fn deserialize<D>(deserializer: D) -> Result<IgnoredAny, D::Error>
+    where
+        D: Deserializer<'de>,
+    {
+        deserializer.deserialize_ignored_any(IgnoredAny)
+    }
+}

serde/src/de/utf8.rs

@@ -0,0 +1,46 @@
+use lib::*;
+
+const TAG_CONT: u8 = 0b1000_0000;
+const TAG_TWO_B: u8 = 0b1100_0000;
+const TAG_THREE_B: u8 = 0b1110_0000;
+const TAG_FOUR_B: u8 = 0b1111_0000;
+const MAX_ONE_B: u32 = 0x80;
+const MAX_TWO_B: u32 = 0x800;
+const MAX_THREE_B: u32 = 0x10000;
+
+#[inline]
+pub fn encode(c: char) -> Encode {
+    let code = c as u32;
+    let mut buf = [0; 4];
+    let pos = if code < MAX_ONE_B {
+        buf[3] = code as u8;
+        3
+    } else if code < MAX_TWO_B {
+        buf[2] = (code >> 6 & 0x1F) as u8 | TAG_TWO_B;
+        buf[3] = (code & 0x3F) as u8 | TAG_CONT;
+        2
+    } else if code < MAX_THREE_B {
+        buf[1] = (code >> 12 & 0x0F) as u8 | TAG_THREE_B;
+        buf[2] = (code >> 6 & 0x3F) as u8 | TAG_CONT;
+        buf[3] = (code & 0x3F) as u8 | TAG_CONT;
+        1
+    } else {
+        buf[0] = (code >> 18 & 0x07) as u8 | TAG_FOUR_B;
+        buf[1] = (code >> 12 & 0x3F) as u8 | TAG_CONT;
+        buf[2] = (code >> 6 & 0x3F) as u8 | TAG_CONT;
+        buf[3] = (code & 0x3F) as u8 | TAG_CONT;
+        0
+    };
+    Encode { buf: buf, pos: pos }
+}
+
+pub struct Encode {
+    buf: [u8; 4],
+    pos: usize,
+}
+
+impl Encode {
+    pub fn as_str(&self) -> &str {
+        str::from_utf8(&self.buf[self.pos..]).unwrap()
+    }
+}

serde/src/export.rs

@@ -0,0 +1,39 @@
+pub use lib::clone::Clone;
+pub use lib::convert::{From, Into};
+pub use lib::default::Default;
+pub use lib::fmt::{self, Formatter};
+pub use lib::marker::PhantomData;
+pub use lib::option::Option::{self, None, Some};
+pub use lib::result::Result::{self, Err, Ok};
+
+pub use self::string::from_utf8_lossy;
+
+#[cfg(any(feature = "alloc", feature = "std"))]
+pub use lib::{ToString, Vec};
+
+#[cfg(core_try_from)]
+pub use lib::convert::TryFrom;
+
+mod string {
+    use lib::*;
+
+    #[cfg(any(feature = "std", feature = "alloc"))]
+    pub fn from_utf8_lossy(bytes: &[u8]) -> Cow<str> {
+        String::from_utf8_lossy(bytes)
+    }
+
+    // The generated code calls this like:
+    //
+    //     let value = &_serde::export::from_utf8_lossy(bytes);
+    //     Err(_serde::de::Error::unknown_variant(value, VARIANTS))
+    //
+    // so it is okay for the return type to be different from the std case as long
+    // as the above works.
+    #[cfg(not(any(feature = "std", feature = "alloc")))]
+    pub fn from_utf8_lossy(bytes: &[u8]) -> &str {
+        // Three unicode replacement characters if it fails. They look like a
+        // white-on-black question mark. The user will recognize it as invalid
+        // UTF-8.
+        str::from_utf8(bytes).unwrap_or("\u{fffd}\u{fffd}\u{fffd}")
+    }
+}

serde/src/integer128.rs

@@ -0,0 +1,82 @@
+/// Conditional compilation depending on whether Serde is built with support for
+/// 128-bit integers.
+///
+/// Data formats that wish to support Rust compiler versions older than 1.26
+/// (or targets that lack 128-bit integers) may place the i128 / u128 methods
+/// of their Serializer and Deserializer behind this macro.
+///
+/// Data formats that require a minimum Rust compiler version of at least 1.26,
+/// or do not target platforms that lack 128-bit integers, do not need to
+/// bother with this macro and may assume support for 128-bit integers.
+///
+/// ```edition2018
+/// # use serde::private::ser::Error;
+/// #
+/// # struct MySerializer;
+/// #
+/// use serde::{serde_if_integer128, Serializer};
+///
+/// impl Serializer for MySerializer {
+///     type Ok = ();
+///     type Error = Error;
+///
+///     fn serialize_i64(self, v: i64) -> Result<Self::Ok, Self::Error> {
+///         /* ... */
+/// #         unimplemented!()
+///     }
+///
+///     /* ... */
+///
+///     serde_if_integer128! {
+///         fn serialize_i128(self, v: i128) -> Result<Self::Ok, Self::Error> {
+///             /* ... */
+/// #             unimplemented!()
+///         }
+///
+///         fn serialize_u128(self, v: u128) -> Result<Self::Ok, Self::Error> {
+///             /* ... */
+/// #             unimplemented!()
+///         }
+///     }
+/// #
+/// #     serde::__serialize_unimplemented! {
+/// #         bool i8 i16 i32 u8 u16 u32 u64 f32 f64 char str bytes none some
+/// #         unit unit_struct unit_variant newtype_struct newtype_variant seq
+/// #         tuple tuple_struct tuple_variant map struct struct_variant
+/// #     }
+/// }
+/// ```
+///
+/// When Serde is built with support for 128-bit integers, this macro expands
+/// transparently into just the input tokens.
+///
+/// ```edition2018
+/// macro_rules! serde_if_integer128 {
+///     ($($tt:tt)*) => {
+///         $($tt)*
+///     };
+/// }
+/// ```
+///
+/// When built without support for 128-bit integers, this macro expands to
+/// nothing.
+///
+/// ```edition2018
+/// macro_rules! serde_if_integer128 {
+///     ($($tt:tt)*) => {};
+/// }
+/// ```
+#[cfg(integer128)]
+#[macro_export]
+macro_rules! serde_if_integer128 {
+    ($($tt:tt)*) => {
+        $($tt)*
+    };
+}
+
+#[cfg(not(integer128))]
+#[macro_export]
+#[doc(hidden)]
+macro_rules! serde_if_integer128 {
+    ($($tt:tt)*) => {};
+}

serde/src/lib.rs

@@ -0,0 +1,267 @@
+//! # Serde
+//!
+//! Serde is a framework for ***ser***ializing and ***de***serializing Rust data
+//! structures efficiently and generically.
+//!
+//! The Serde ecosystem consists of data structures that know how to serialize
+//! and deserialize themselves along with data formats that know how to
+//! serialize and deserialize other things. Serde provides the layer by which
+//! these two groups interact with each other, allowing any supported data
+//! structure to be serialized and deserialized using any supported data format.
+//!
+//! See the Serde website [https://serde.rs/] for additional documentation and
+//! usage examples.
+//!
+//! [https://serde.rs/]: https://serde.rs/
+//!
+//! ## Design
+//!
+//! Where many other languages rely on runtime reflection for serializing data,
+//! Serde is instead built on Rust's powerful trait system. A data structure
+//! that knows how to serialize and deserialize itself is one that implements
+//! Serde's `Serialize` and `Deserialize` traits (or uses Serde's derive
+//! attribute to automatically generate implementations at compile time). This
+//! avoids any overhead of reflection or runtime type information. In fact in
+//! many situations the interaction between data structure and data format can
+//! be completely optimized away by the Rust compiler, leaving Serde
+//! serialization to perform the same speed as a handwritten serializer for the
+//! specific selection of data structure and data format.
+//!
+//! ## Data formats
+//!
+//! The following is a partial list of data formats that have been implemented
+//! for Serde by the community.
+//!
+//! - [JSON], the ubiquitous JavaScript Object Notation used by many HTTP APIs.
+//! - [Bincode], a compact binary format
+//!   used for IPC within the Servo rendering engine.
+//! - [CBOR], a Concise Binary Object Representation designed for small message
+//!   size without the need for version negotiation.
+//! - [YAML], a popular human-friendly configuration language that ain't markup
+//!   language.
+//! - [MessagePack], an efficient binary format that resembles a compact JSON.
+//! - [TOML], a minimal configuration format used by [Cargo].
+//! - [Pickle], a format common in the Python world.
+//! - [RON], a Rusty Object Notation.
+//! - [BSON], the data storage and network transfer format used by MongoDB.
+//! - [Avro], a binary format used within Apache Hadoop, with support for schema
+//!   definition.
+//! - [JSON5], A superset of JSON including some productions from ES5.
+//! - [URL], the x-www-form-urlencoded format.
+//! - [Envy], a way to deserialize environment variables into Rust structs.
+//!   *(deserialization only)*
+//! - [Envy Store], a way to deserialize [AWS Parameter Store] parameters into
+//!   Rust structs. *(deserialization only)*
+//! - [Postcard], a `no_std` and embedded-systems friendly compact binary format.
+//!
+//! [JSON]: https://github.com/serde-rs/json
+//! [Bincode]: https://github.com/TyOverby/bincode
+//! [CBOR]: https://github.com/pyfisch/cbor
+//! [YAML]: https://github.com/dtolnay/serde-yaml
+//! [MessagePack]: https://github.com/3Hren/msgpack-rust
+//! [TOML]: https://github.com/alexcrichton/toml-rs
+//! [Pickle]: https://github.com/birkenfeld/serde-pickle
+//! [RON]: https://github.com/ron-rs/ron
+//! [BSON]: https://github.com/zonyitoo/bson-rs
+//! [Avro]: https://github.com/flavray/avro-rs
+//! [JSON5]: https://github.com/callum-oakley/json5-rs
+//! [URL]: https://github.com/nox/serde_urlencoded
+//! [Envy]: https://github.com/softprops/envy
+//! [Envy Store]: https://github.com/softprops/envy-store
+//! [Cargo]: http://doc.crates.io/manifest.html
+//! [AWS Parameter Store]: https://docs.aws.amazon.com/systems-manager/latest/userguide/systems-manager-paramstore.html
+//! [Postcard]: https://github.com/jamesmunns/postcard
+
+////////////////////////////////////////////////////////////////////////////////
+
+// Serde types in rustdoc of other crates get linked to here.
+#![doc(html_root_url = "https://docs.rs/serde/1.0.100")]
+// Support using Serde without the standard library!
+#![cfg_attr(not(feature = "std"), no_std)]
+// Unstable functionality only if the user asks for it. For tracking and
+// discussion of these features please refer to this issue:
+//
+//    https://github.com/serde-rs/serde/issues/812
+#![cfg_attr(feature = "unstable", feature(specialization, never_type))]
+#![allow(unknown_lints, bare_trait_objects, deprecated)]
+#![cfg_attr(feature = "cargo-clippy", allow(renamed_and_removed_lints))]
+#![cfg_attr(feature = "cargo-clippy", deny(clippy, clippy_pedantic))]
+// Ignored clippy and clippy_pedantic lints
+#![cfg_attr(
+    feature = "cargo-clippy",
+    allow(
+        // not available in our oldest supported compiler
+        checked_conversions,
+        empty_enum,
+        redundant_field_names,
+        redundant_static_lifetimes,
+        // integer and float ser/de requires these sorts of casts
+        cast_possible_truncation,
+        cast_possible_wrap,
+        cast_sign_loss,
+        // things are often more readable this way
+        cast_lossless,
+        module_name_repetitions,
+        single_match_else,
+        type_complexity,
+        use_self,
+        zero_prefixed_literal,
+        // not practical
+        needless_pass_by_value,
+        similar_names,
+        // preference
+        doc_markdown,
+    )
+)]
+// Rustc lints.
+#![deny(missing_docs, unused_imports)]
+
+////////////////////////////////////////////////////////////////////////////////
+
+#[cfg(feature = "alloc")]
+extern crate alloc;
+
+/// A facade around all the types we need from the `std`, `core`, and `alloc`
+/// crates. This avoids elaborate import wrangling having to happen in every
+/// module.
+mod lib {
+    mod core {
+        #[cfg(not(feature = "std"))]
+        pub use core::*;
+        #[cfg(feature = "std")]
+        pub use std::*;
+    }
+
+    pub use self::core::{cmp, iter, mem, num, slice, str};
+    pub use self::core::{f32, f64};
+    pub use self::core::{i16, i32, i64, i8, isize};
+    pub use self::core::{u16, u32, u64, u8, usize};
+
+    pub use self::core::cell::{Cell, RefCell};
+    pub use self::core::clone::{self, Clone};
+    pub use self::core::convert::{self, From, Into};
+    pub use self::core::default::{self, Default};
+    pub use self::core::fmt::{self, Debug, Display};
+    pub use self::core::marker::{self, PhantomData};
+    pub use self::core::ops::Range;
+    pub use self::core::option::{self, Option};
+    pub use self::core::result::{self, Result};
+
+    #[cfg(all(feature = "alloc", not(feature = "std")))]
+    pub use alloc::borrow::{Cow, ToOwned};
+    #[cfg(feature = "std")]
+    pub use std::borrow::{Cow, ToOwned};
+
+    #[cfg(all(feature = "alloc", not(feature = "std")))]
+    pub use alloc::string::{String, ToString};
+    #[cfg(feature = "std")]
+    pub use std::string::{String, ToString};
+
+    #[cfg(all(feature = "alloc", not(feature = "std")))]
+    pub use alloc::vec::Vec;
+    #[cfg(feature = "std")]
+    pub use std::vec::Vec;
+
+    #[cfg(all(feature = "alloc", not(feature = "std")))]
+    pub use alloc::boxed::Box;
+    #[cfg(feature = "std")]
+    pub use std::boxed::Box;
+
+    #[cfg(all(feature = "rc", feature = "alloc", not(feature = "std")))]
+    pub use alloc::rc::{Rc, Weak as RcWeak};
+    #[cfg(all(feature = "rc", feature = "std"))]
+    pub use std::rc::{Rc, Weak as RcWeak};
+
+    #[cfg(all(feature = "rc", feature = "alloc", not(feature = "std")))]
+    pub use alloc::sync::{Arc, Weak as ArcWeak};
+    #[cfg(all(feature = "rc", feature = "std"))]
+    pub use std::sync::{Arc, Weak as ArcWeak};
+
+    #[cfg(all(feature = "alloc", not(feature = "std")))]
+    pub use alloc::collections::{BTreeMap, BTreeSet, BinaryHeap, LinkedList, VecDeque};
+    #[cfg(feature = "std")]
+    pub use std::collections::{BTreeMap, BTreeSet, BinaryHeap, LinkedList, VecDeque};
+
+    #[cfg(feature = "std")]
+    pub use std::{error, net};
+
+    #[cfg(feature = "std")]
+    pub use std::collections::{HashMap, HashSet};
+    #[cfg(feature = "std")]
+    pub use std::ffi::{CStr, CString, OsStr, OsString};
+    #[cfg(feature = "std")]
+    pub use std::hash::{BuildHasher, Hash};
+    #[cfg(feature = "std")]
+    pub use std::io::Write;
+    #[cfg(feature = "std")]
+    pub use std::num::Wrapping;
+    #[cfg(feature = "std")]
+    pub use std::path::{Path, PathBuf};
+    #[cfg(feature = "std")]
+    pub use std::sync::{Mutex, RwLock};
+    #[cfg(feature = "std")]
+    pub use std::time::{SystemTime, UNIX_EPOCH};
+
+    #[cfg(all(feature = "std", collections_bound))]
+    pub use std::collections::Bound;
+
+    #[cfg(core_reverse)]
+    pub use self::core::cmp::Reverse;
+
+    #[cfg(ops_bound)]
+    pub use self::core::ops::Bound;
+
+    #[cfg(range_inclusive)]
+    pub use self::core::ops::RangeInclusive;
+
+    #[cfg(all(feature = "std", std_atomic))]
+    pub use std::sync::atomic::{
+        AtomicBool, AtomicI16, AtomicI32, AtomicI8, AtomicIsize, AtomicU16, AtomicU32, AtomicU8,
+        AtomicUsize, Ordering,
+    };
+    #[cfg(all(feature = "std", std_atomic64))]
+    pub use std::sync::atomic::{AtomicI64, AtomicU64};
+
+    #[cfg(any(core_duration, feature = "std"))]
+    pub use self::core::time::Duration;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
+#[macro_use]
+mod macros;
+
+#[macro_use]
+mod integer128;
+
+pub mod de;
+pub mod ser;
+
+#[doc(inline)]
+pub use de::{Deserialize, Deserializer};
+#[doc(inline)]
+pub use ser::{Serialize, Serializer};
+
+// Generated code uses these to support no_std. Not public API.
+#[doc(hidden)]
+pub mod export;
+
+// Helpers used by generated code and doc tests. Not public API.
+#[doc(hidden)]
+pub mod private;
+
+#[cfg(not(feature = "std"))]
+mod std_error;
+
+// Re-export #[derive(Serialize, Deserialize)].
+//
+// The reason re-exporting is not enabled by default is that disabling it would
+// be annoying for crates that provide handwritten impls or data formats. They
+// would need to disable default features and then explicitly re-enable std.
+#[cfg(feature = "serde_derive")]
+#[allow(unused_imports)]
+#[macro_use]
+extern crate serde_derive;
+#[cfg(feature = "serde_derive")]
+#[doc(hidden)]
+pub use serde_derive::*;

serde/src/macros.rs

@@ -0,0 +1,236 @@
+// Super explicit first paragraph because this shows up at the top level and
+// trips up people who are just looking for basic Serialize / Deserialize
+// documentation.
+//
+/// Helper macro when implementing the `Deserializer` part of a new data format
+/// for Serde.
+///
+/// Some [`Deserializer`] implementations for self-describing formats do not
+/// care what hint the [`Visitor`] gives them, they just want to blindly call
+/// the [`Visitor`] method corresponding to the data they can tell is in the
+/// input. This requires repetitive implementations of all the [`Deserializer`]
+/// trait methods.
+///
+/// ```edition2018
+/// # use serde::forward_to_deserialize_any;
+/// # use serde::de::{value, Deserializer, Visitor};
+/// #
+/// # struct MyDeserializer;
+/// #
+/// # impl<'de> Deserializer<'de> for MyDeserializer {
+/// #     type Error = value::Error;
+/// #
+/// #     fn deserialize_any<V>(self, _: V) -> Result<V::Value, Self::Error>
+/// #     where
+/// #         V: Visitor<'de>,
+/// #     {
+/// #         unimplemented!()
+/// #     }
+/// #
+/// #[inline]
+/// fn deserialize_bool<V>(self, visitor: V) -> Result<V::Value, Self::Error>
+/// where
+///     V: Visitor<'de>,
+/// {
+///     self.deserialize_any(visitor)
+/// }
+/// #
+/// #     forward_to_deserialize_any! {
+/// #         i8 i16 i32 i64 i128 u8 u16 u32 u64 u128 f32 f64 char str string
+/// #         bytes byte_buf option unit unit_struct newtype_struct seq tuple
+/// #         tuple_struct map struct enum identifier ignored_any
+/// #     }
+/// # }
+/// ```
+///
+/// The `forward_to_deserialize_any!` macro implements these simple forwarding
+/// methods so that they forward directly to [`Deserializer::deserialize_any`].
+/// You can choose which methods to forward.
+///
+/// ```edition2018
+/// # use serde::forward_to_deserialize_any;
+/// # use serde::de::{value, Deserializer, Visitor};
+/// #
+/// # struct MyDeserializer;
+/// #
+/// impl<'de> Deserializer<'de> for MyDeserializer {
+/// #   type Error = value::Error;
+/// #
+///     fn deserialize_any<V>(self, visitor: V) -> Result<V::Value, Self::Error>
+///     where
+///         V: Visitor<'de>,
+///     {
+///         /* ... */
+/// #       let _ = visitor;
+/// #       unimplemented!()
+///     }
+///
+///     forward_to_deserialize_any! {
+///         bool i8 i16 i32 i64 i128 u8 u16 u32 u64 u128 f32 f64 char str string
+///         bytes byte_buf option unit unit_struct newtype_struct seq tuple
+///         tuple_struct map struct enum identifier ignored_any
+///     }
+/// }
+/// ```
+///
+/// The macro assumes the convention that your `Deserializer` lifetime parameter
+/// is called `'de` and that the `Visitor` type parameters on each method are
+/// called `V`. A different type parameter and a different lifetime can be
+/// specified explicitly if necessary.
+///
+/// ```edition2018
+/// # use std::marker::PhantomData;
+/// #
+/// # use serde::forward_to_deserialize_any;
+/// # use serde::de::{value, Deserializer, Visitor};
+/// #
+/// # struct MyDeserializer<V>(PhantomData<V>);
+/// #
+/// # impl<'q, V> Deserializer<'q> for MyDeserializer<V> {
+/// #     type Error = value::Error;
+/// #
+/// #     fn deserialize_any<W>(self, visitor: W) -> Result<W::Value, Self::Error>
+/// #     where
+/// #         W: Visitor<'q>,
+/// #     {
+/// #         unimplemented!()
+/// #     }
+/// #
+/// forward_to_deserialize_any! {
+///     <W: Visitor<'q>>
+///     bool i8 i16 i32 i64 i128 u8 u16 u32 u64 u128 f32 f64 char str string
+///     bytes byte_buf option unit unit_struct newtype_struct seq tuple
+///     tuple_struct map struct enum identifier ignored_any
+/// }
+/// # }
+/// ```
+///
+/// [`Deserializer`]: trait.Deserializer.html
+/// [`Visitor`]: de/trait.Visitor.html
+/// [`Deserializer::deserialize_any`]: trait.Deserializer.html#tymethod.deserialize_any
+#[macro_export(local_inner_macros)]
+macro_rules! forward_to_deserialize_any {
+    (<$visitor:ident: Visitor<$lifetime:tt>> $($func:ident)*) => {
+        $(forward_to_deserialize_any_helper!{$func<$lifetime, $visitor>})*
+    };
+    // This case must be after the previous one.
+    ($($func:ident)*) => {
+        $(forward_to_deserialize_any_helper!{$func<'de, V>})*
+    };
+}
+
+#[doc(hidden)]
+#[macro_export]
+macro_rules! forward_to_deserialize_any_method {
+    ($func:ident<$l:tt, $v:ident>($($arg:ident : $ty:ty),*)) => {
+        #[inline]
+        fn $func<$v>(self, $($arg: $ty,)* visitor: $v) -> $crate::export::Result<$v::Value, Self::Error>
+        where
+            $v: $crate::de::Visitor<$l>,
+        {
+            $(
+                let _ = $arg;
+            )*
+            self.deserialize_any(visitor)
+        }
+    };
+}
+
+#[doc(hidden)]
+#[macro_export(local_inner_macros)]
+macro_rules! forward_to_deserialize_any_helper {
+    (bool<$l:tt, $v:ident>) => {
+        forward_to_deserialize_any_method!{deserialize_bool<$l, $v>()}
+    };
+    (i8<$l:tt, $v:ident>) => {
+        forward_to_deserialize_any_method!{deserialize_i8<$l, $v>()}
+    };
+    (i16<$l:tt, $v:ident>) => {
+        forward_to_deserialize_any_method!{deserialize_i16<$l, $v>()}
+    };
+    (i32<$l:tt, $v:ident>) => {
+        forward_to_deserialize_any_method!{deserialize_i32<$l, $v>()}
+    };
+    (i64<$l:tt, $v:ident>) => {
+        forward_to_deserialize_any_method!{deserialize_i64<$l, $v>()}
+    };
+    (i128<$l:tt, $v:ident>) => {
+        serde_if_integer128! {
+            forward_to_deserialize_any_method!{deserialize_i128<$l, $v>()}
+        }
+    };
+    (u8<$l:tt, $v:ident>) => {
+        forward_to_deserialize_any_method!{deserialize_u8<$l, $v>()}
+    };
+    (u16<$l:tt, $v:ident>) => {
+        forward_to_deserialize_any_method!{deserialize_u16<$l, $v>()}
+    };
+    (u32<$l:tt, $v:ident>) => {
+        forward_to_deserialize_any_method!{deserialize_u32<$l, $v>()}
+    };
+    (u64<$l:tt, $v:ident>) => {
+        forward_to_deserialize_any_method!{deserialize_u64<$l, $v>()}
+    };
+    (u128<$l:tt, $v:ident>) => {
+        serde_if_integer128! {
+            forward_to_deserialize_any_method!{deserialize_u128<$l, $v>()}
+        }
+    };
+    (f32<$l:tt, $v:ident>) => {
+        forward_to_deserialize_any_method!{deserialize_f32<$l, $v>()}
+    };
+    (f64<$l:tt, $v:ident>) => {
+        forward_to_deserialize_any_method!{deserialize_f64<$l, $v>()}
+    };
+    (char<$l:tt, $v:ident>) => {
+        forward_to_deserialize_any_method!{deserialize_char<$l, $v>()}
+    };
+    (str<$l:tt, $v:ident>) => {
+        forward_to_deserialize_any_method!{deserialize_str<$l, $v>()}
+    };
+    (string<$l:tt, $v:ident>) => {
+        forward_to_deserialize_any_method!{deserialize_string<$l, $v>()}
+    };
+    (bytes<$l:tt, $v:ident>) => {
+        forward_to_deserialize_any_method!{deserialize_bytes<$l, $v>()}
+    };
+    (byte_buf<$l:tt, $v:ident>) => {
+        forward_to_deserialize_any_method!{deserialize_byte_buf<$l, $v>()}
+    };
+    (option<$l:tt, $v:ident>) => {
+        forward_to_deserialize_any_method!{deserialize_option<$l, $v>()}
+    };
+    (unit<$l:tt, $v:ident>) => {
+        forward_to_deserialize_any_method!{deserialize_unit<$l, $v>()}
+    };
+    (unit_struct<$l:tt, $v:ident>) => {
+        forward_to_deserialize_any_method!{deserialize_unit_struct<$l, $v>(name: &'static str)}
+    };
+    (newtype_struct<$l:tt, $v:ident>) => {
+        forward_to_deserialize_any_method!{deserialize_newtype_struct<$l, $v>(name: &'static str)}
+    };
+    (seq<$l:tt, $v:ident>) => {
+        forward_to_deserialize_any_method!{deserialize_seq<$l, $v>()}
+    };
+    (tuple<$l:tt, $v:ident>) => {
+        forward_to_deserialize_any_method!{deserialize_tuple<$l, $v>(len: usize)}
+    };
+    (tuple_struct<$l:tt, $v:ident>) => {
+        forward_to_deserialize_any_method!{deserialize_tuple_struct<$l, $v>(name: &'static str, len: usize)}
+    };
+    (map<$l:tt, $v:ident>) => {
+        forward_to_deserialize_any_method!{deserialize_map<$l, $v>()}
+    };
+    (struct<$l:tt, $v:ident>) => {
+        forward_to_deserialize_any_method!{deserialize_struct<$l, $v>(name: &'static str, fields: &'static [&'static str])}
+    };
+    (enum<$l:tt, $v:ident>) => {
+        forward_to_deserialize_any_method!{deserialize_enum<$l, $v>(name: &'static str, variants: &'static [&'static str])}
+    };
+    (identifier<$l:tt, $v:ident>) => {
+        forward_to_deserialize_any_method!{deserialize_identifier<$l, $v>()}
+    };
+    (ignored_any<$l:tt, $v:ident>) => {
+        forward_to_deserialize_any_method!{deserialize_ignored_any<$l, $v>()}
+    };
+}

serde/src/private/macros.rs

@@ -0,0 +1,140 @@
+#[doc(hidden)]
+#[macro_export]
+macro_rules! __private_serialize {
+    () => {
+        trait Serialize {
+            fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+            where
+                S: $crate::Serializer;
+        }
+    };
+}
+
+#[doc(hidden)]
+#[macro_export]
+macro_rules! __private_deserialize {
+    () => {
+        trait Deserialize<'de>: Sized {
+            fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
+            where
+                D: $crate::Deserializer<'de>;
+        }
+    };
+}
+
+/// Used only by Serde doc tests. Not public API.
+#[doc(hidden)]
+#[macro_export(local_inner_macros)]
+macro_rules! __serialize_unimplemented {
+    ($($func:ident)*) => {
+        $(
+            __serialize_unimplemented_helper!($func);
+        )*
+    };
+}
+
+#[doc(hidden)]
+#[macro_export]
+macro_rules! __serialize_unimplemented_method {
+    ($func:ident $(<$t:ident>)* ($($arg:ty),*) -> $ret:ident) => {
+        fn $func $(<$t: ?Sized + $crate::Serialize>)* (self $(, _: $arg)*) -> $crate::export::Result<Self::$ret, Self::Error> {
+            unimplemented!()
+        }
+    };
+}
+
+#[doc(hidden)]
+#[macro_export(local_inner_macros)]
+macro_rules! __serialize_unimplemented_helper {
+    (bool) => {
+        __serialize_unimplemented_method!(serialize_bool(bool) -> Ok);
+    };
+    (i8) => {
+        __serialize_unimplemented_method!(serialize_i8(i8) -> Ok);
+    };
+    (i16) => {
+        __serialize_unimplemented_method!(serialize_i16(i16) -> Ok);
+    };
+    (i32) => {
+        __serialize_unimplemented_method!(serialize_i32(i32) -> Ok);
+    };
+    (i64) => {
+        __serialize_unimplemented_method!(serialize_i64(i64) -> Ok);
+    };
+    (u8) => {
+        __serialize_unimplemented_method!(serialize_u8(u8) -> Ok);
+    };
+    (u16) => {
+        __serialize_unimplemented_method!(serialize_u16(u16) -> Ok);
+    };
+    (u32) => {
+        __serialize_unimplemented_method!(serialize_u32(u32) -> Ok);
+    };
+    (u64) => {
+        __serialize_unimplemented_method!(serialize_u64(u64) -> Ok);
+    };
+    (f32) => {
+        __serialize_unimplemented_method!(serialize_f32(f32) -> Ok);
+    };
+    (f64) => {
+        __serialize_unimplemented_method!(serialize_f64(f64) -> Ok);
+    };
+    (char) => {
+        __serialize_unimplemented_method!(serialize_char(char) -> Ok);
+    };
+    (str) => {
+        __serialize_unimplemented_method!(serialize_str(&str) -> Ok);
+    };
+    (bytes) => {
+        __serialize_unimplemented_method!(serialize_bytes(&[u8]) -> Ok);
+    };
+    (none) => {
+        __serialize_unimplemented_method!(serialize_none() -> Ok);
+    };
+    (some) => {
+        __serialize_unimplemented_method!(serialize_some<T>(&T) -> Ok);
+    };
+    (unit) => {
+        __serialize_unimplemented_method!(serialize_unit() -> Ok);
+    };
+    (unit_struct) => {
+        __serialize_unimplemented_method!(serialize_unit_struct(&str) -> Ok);
+    };
+    (unit_variant) => {
+        __serialize_unimplemented_method!(serialize_unit_variant(&str, u32, &str) -> Ok);
+    };
+    (newtype_struct) => {
+        __serialize_unimplemented_method!(serialize_newtype_struct<T>(&str, &T) -> Ok);
+    };
+    (newtype_variant) => {
+        __serialize_unimplemented_method!(serialize_newtype_variant<T>(&str, u32, &str, &T) -> Ok);
+    };
+    (seq) => {
+        type SerializeSeq = $crate::ser::Impossible<Self::Ok, Self::Error>;
+        __serialize_unimplemented_method!(serialize_seq(Option<usize>) -> SerializeSeq);
+    };
+    (tuple) => {
+        type SerializeTuple = $crate::ser::Impossible<Self::Ok, Self::Error>;
+        __serialize_unimplemented_method!(serialize_tuple(usize) -> SerializeTuple);
+    };
+    (tuple_struct) => {
+        type SerializeTupleStruct = $crate::ser::Impossible<Self::Ok, Self::Error>;
+        __serialize_unimplemented_method!(serialize_tuple_struct(&str, usize) -> SerializeTupleStruct);
+    };
+    (tuple_variant) => {
+        type SerializeTupleVariant = $crate::ser::Impossible<Self::Ok, Self::Error>;
+        __serialize_unimplemented_method!(serialize_tuple_variant(&str, u32, &str, usize) -> SerializeTupleVariant);
+    };
+    (map) => {
+        type SerializeMap = $crate::ser::Impossible<Self::Ok, Self::Error>;
+        __serialize_unimplemented_method!(serialize_map(Option<usize>) -> SerializeMap);
+    };
+    (struct) => {
+        type SerializeStruct = $crate::ser::Impossible<Self::Ok, Self::Error>;
+        __serialize_unimplemented_method!(serialize_struct(&str, usize) -> SerializeStruct);
+    };
+    (struct_variant) => {
+        type SerializeStructVariant = $crate::ser::Impossible<Self::Ok, Self::Error>;
+        __serialize_unimplemented_method!(serialize_struct_variant(&str, u32, &str, usize) -> SerializeStructVariant);
+    };
+}

serde/src/private/mod.rs

@@ -0,0 +1,4 @@
+mod macros;
+
+pub mod de;
+pub mod ser;

serde/src/ser/impls.rs

@@ -0,0 +1,884 @@
+use lib::*;
+
+use ser::{Error, Serialize, SerializeTuple, Serializer};
+
+////////////////////////////////////////////////////////////////////////////////
+
+macro_rules! primitive_impl {
+    ($ty:ident, $method:ident $($cast:tt)*) => {
+        impl Serialize for $ty {
+            #[inline]
+            fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+            where
+                S: Serializer,
+            {
+                serializer.$method(*self $($cast)*)
+            }
+        }
+    }
+}
+
+primitive_impl!(bool, serialize_bool);
+primitive_impl!(isize, serialize_i64 as i64);
+primitive_impl!(i8, serialize_i8);
+primitive_impl!(i16, serialize_i16);
+primitive_impl!(i32, serialize_i32);
+primitive_impl!(i64, serialize_i64);
+primitive_impl!(usize, serialize_u64 as u64);
+primitive_impl!(u8, serialize_u8);
+primitive_impl!(u16, serialize_u16);
+primitive_impl!(u32, serialize_u32);
+primitive_impl!(u64, serialize_u64);
+primitive_impl!(f32, serialize_f32);
+primitive_impl!(f64, serialize_f64);
+primitive_impl!(char, serialize_char);
+
+serde_if_integer128! {
+    primitive_impl!(i128, serialize_i128);
+    primitive_impl!(u128, serialize_u128);
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
+impl Serialize for str {
+    #[inline]
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        serializer.serialize_str(self)
+    }
+}
+
+#[cfg(any(feature = "std", feature = "alloc"))]
+impl Serialize for String {
+    #[inline]
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        serializer.serialize_str(self)
+    }
+}
+
+impl<'a> Serialize for fmt::Arguments<'a> {
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        serializer.collect_str(self)
+    }
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
+#[cfg(feature = "std")]
+impl Serialize for CStr {
+    #[inline]
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        serializer.serialize_bytes(self.to_bytes())
+    }
+}
+
+#[cfg(feature = "std")]
+impl Serialize for CString {
+    #[inline]
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        serializer.serialize_bytes(self.to_bytes())
+    }
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
+impl<T> Serialize for Option<T>
+where
+    T: Serialize,
+{
+    #[inline]
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        match *self {
+            Some(ref value) => serializer.serialize_some(value),
+            None => serializer.serialize_none(),
+        }
+    }
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
+impl<T: ?Sized> Serialize for PhantomData<T> {
+    #[inline]
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        serializer.serialize_unit_struct("PhantomData")
+    }
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
+// Does not require T: Serialize.
+impl<T> Serialize for [T; 0] {
+    #[inline]
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        try!(serializer.serialize_tuple(0)).end()
+    }
+}
+
+macro_rules! array_impls {
+    ($($len:tt)+) => {
+        $(
+            impl<T> Serialize for [T; $len]
+            where
+                T: Serialize,
+            {
+                #[inline]
+                fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+                where
+                    S: Serializer,
+                {
+                    let mut seq = try!(serializer.serialize_tuple($len));
+                    for e in self {
+                        try!(seq.serialize_element(e));
+                    }
+                    seq.end()
+                }
+            }
+        )+
+    }
+}
+
+array_impls! {
+    01 02 03 04 05 06 07 08 09 10
+    11 12 13 14 15 16 17 18 19 20
+    21 22 23 24 25 26 27 28 29 30
+    31 32
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
+impl<T> Serialize for [T]
+where
+    T: Serialize,
+{
+    #[inline]
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        serializer.collect_seq(self)
+    }
+}
+
+#[cfg(any(feature = "std", feature = "alloc"))]
+macro_rules! seq_impl {
+    ($ty:ident < T $(: $tbound1:ident $(+ $tbound2:ident)*)* $(, $typaram:ident : $bound:ident)* >) => {
+        impl<T $(, $typaram)*> Serialize for $ty<T $(, $typaram)*>
+        where
+            T: Serialize $(+ $tbound1 $(+ $tbound2)*)*,
+            $($typaram: $bound,)*
+        {
+            #[inline]
+            fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+            where
+                S: Serializer,
+            {
+                serializer.collect_seq(self)
+            }
+        }
+    }
+}
+
+#[cfg(any(feature = "std", feature = "alloc"))]
+seq_impl!(BinaryHeap<T: Ord>);
+
+#[cfg(any(feature = "std", feature = "alloc"))]
+seq_impl!(BTreeSet<T: Ord>);
+
+#[cfg(feature = "std")]
+seq_impl!(HashSet<T: Eq + Hash, H: BuildHasher>);
+
+#[cfg(any(feature = "std", feature = "alloc"))]
+seq_impl!(LinkedList<T>);
+
+#[cfg(any(feature = "std", feature = "alloc"))]
+seq_impl!(Vec<T>);
+
+#[cfg(any(feature = "std", feature = "alloc"))]
+seq_impl!(VecDeque<T>);
+
+////////////////////////////////////////////////////////////////////////////////
+
+impl<Idx> Serialize for Range<Idx>
+where
+    Idx: Serialize,
+{
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        use super::SerializeStruct;
+        let mut state = try!(serializer.serialize_struct("Range", 2));
+        try!(state.serialize_field("start", &self.start));
+        try!(state.serialize_field("end", &self.end));
+        state.end()
+    }
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
+#[cfg(range_inclusive)]
+impl<Idx> Serialize for RangeInclusive<Idx>
+where
+    Idx: Serialize,
+{
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        use super::SerializeStruct;
+        let mut state = try!(serializer.serialize_struct("RangeInclusive", 2));
+        try!(state.serialize_field("start", &self.start()));
+        try!(state.serialize_field("end", &self.end()));
+        state.end()
+    }
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
+#[cfg(any(ops_bound, collections_bound))]
+impl<T> Serialize for Bound<T>
+where
+    T: Serialize,
+{
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        match *self {
+            Bound::Unbounded => serializer.serialize_unit_variant("Bound", 0, "Unbounded"),
+            Bound::Included(ref value) => {
+                serializer.serialize_newtype_variant("Bound", 1, "Included", value)
+            }
+            Bound::Excluded(ref value) => {
+                serializer.serialize_newtype_variant("Bound", 2, "Excluded", value)
+            }
+        }
+    }
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
+impl Serialize for () {
+    #[inline]
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        serializer.serialize_unit()
+    }
+}
+
+#[cfg(feature = "unstable")]
+impl Serialize for ! {
+    fn serialize<S>(&self, _serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        *self
+    }
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
+macro_rules! tuple_impls {
+    ($($len:expr => ($($n:tt $name:ident)+))+) => {
+        $(
+            impl<$($name),+> Serialize for ($($name,)+)
+            where
+                $($name: Serialize,)+
+            {
+                #[inline]
+                fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+                where
+                    S: Serializer,
+                {
+                    let mut tuple = try!(serializer.serialize_tuple($len));
+                    $(
+                        try!(tuple.serialize_element(&self.$n));
+                    )+
+                    tuple.end()
+                }
+            }
+        )+
+    }
+}
+
+tuple_impls! {
+    1 => (0 T0)
+    2 => (0 T0 1 T1)
+    3 => (0 T0 1 T1 2 T2)
+    4 => (0 T0 1 T1 2 T2 3 T3)
+    5 => (0 T0 1 T1 2 T2 3 T3 4 T4)
+    6 => (0 T0 1 T1 2 T2 3 T3 4 T4 5 T5)
+    7 => (0 T0 1 T1 2 T2 3 T3 4 T4 5 T5 6 T6)
+    8 => (0 T0 1 T1 2 T2 3 T3 4 T4 5 T5 6 T6 7 T7)
+    9 => (0 T0 1 T1 2 T2 3 T3 4 T4 5 T5 6 T6 7 T7 8 T8)
+    10 => (0 T0 1 T1 2 T2 3 T3 4 T4 5 T5 6 T6 7 T7 8 T8 9 T9)
+    11 => (0 T0 1 T1 2 T2 3 T3 4 T4 5 T5 6 T6 7 T7 8 T8 9 T9 10 T10)
+    12 => (0 T0 1 T1 2 T2 3 T3 4 T4 5 T5 6 T6 7 T7 8 T8 9 T9 10 T10 11 T11)
+    13 => (0 T0 1 T1 2 T2 3 T3 4 T4 5 T5 6 T6 7 T7 8 T8 9 T9 10 T10 11 T11 12 T12)
+    14 => (0 T0 1 T1 2 T2 3 T3 4 T4 5 T5 6 T6 7 T7 8 T8 9 T9 10 T10 11 T11 12 T12 13 T13)
+    15 => (0 T0 1 T1 2 T2 3 T3 4 T4 5 T5 6 T6 7 T7 8 T8 9 T9 10 T10 11 T11 12 T12 13 T13 14 T14)
+    16 => (0 T0 1 T1 2 T2 3 T3 4 T4 5 T5 6 T6 7 T7 8 T8 9 T9 10 T10 11 T11 12 T12 13 T13 14 T14 15 T15)
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
+#[cfg(any(feature = "std", feature = "alloc"))]
+macro_rules! map_impl {
+    ($ty:ident < K $(: $kbound1:ident $(+ $kbound2:ident)*)*, V $(, $typaram:ident : $bound:ident)* >) => {
+        impl<K, V $(, $typaram)*> Serialize for $ty<K, V $(, $typaram)*>
+        where
+            K: Serialize $(+ $kbound1 $(+ $kbound2)*)*,
+            V: Serialize,
+            $($typaram: $bound,)*
+        {
+            #[inline]
+            fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+            where
+                S: Serializer,
+            {
+                serializer.collect_map(self)
+            }
+        }
+    }
+}
+
+#[cfg(any(feature = "std", feature = "alloc"))]
+map_impl!(BTreeMap<K: Ord, V>);
+
+#[cfg(feature = "std")]
+map_impl!(HashMap<K: Eq + Hash, V, H: BuildHasher>);
+
+////////////////////////////////////////////////////////////////////////////////
+
+macro_rules! deref_impl {
+    (
+        $(#[doc = $doc:tt])*
+        <$($desc:tt)+
+    ) => {
+        $(#[doc = $doc])*
+        impl <$($desc)+ {
+            #[inline]
+            fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+            where
+                S: Serializer,
+            {
+                (**self).serialize(serializer)
+            }
+        }
+    };
+}
+
+deref_impl!(<'a, T: ?Sized> Serialize for &'a T where T: Serialize);
+deref_impl!(<'a, T: ?Sized> Serialize for &'a mut T where T: Serialize);
+
+#[cfg(any(feature = "std", feature = "alloc"))]
+deref_impl!(<T: ?Sized> Serialize for Box<T> where T: Serialize);
+
+#[cfg(all(feature = "rc", any(feature = "std", feature = "alloc")))]
+deref_impl! {
+    /// This impl requires the [`"rc"`] Cargo feature of Serde.
+    ///
+    /// Serializing a data structure containing `Rc` will serialize a copy of
+    /// the contents of the `Rc` each time the `Rc` is referenced within the
+    /// data structure. Serialization will not attempt to deduplicate these
+    /// repeated data.
+    ///
+    /// [`"rc"`]: https://serde.rs/feature-flags.html#-features-rc
+    <T: ?Sized> Serialize for Rc<T> where T: Serialize
+}
+
+#[cfg(all(feature = "rc", any(feature = "std", feature = "alloc")))]
+deref_impl! {
+    /// This impl requires the [`"rc"`] Cargo feature of Serde.
+    ///
+    /// Serializing a data structure containing `Arc` will serialize a copy of
+    /// the contents of the `Arc` each time the `Arc` is referenced within the
+    /// data structure. Serialization will not attempt to deduplicate these
+    /// repeated data.
+    ///
+    /// [`"rc"`]: https://serde.rs/feature-flags.html#-features-rc
+    <T: ?Sized> Serialize for Arc<T> where T: Serialize
+}
+
+#[cfg(any(feature = "std", feature = "alloc"))]
+deref_impl!(<'a, T: ?Sized> Serialize for Cow<'a, T> where T: Serialize + ToOwned);
+
+////////////////////////////////////////////////////////////////////////////////
+
+/// This impl requires the [`"rc"`] Cargo feature of Serde.
+///
+/// [`"rc"`]: https://serde.rs/feature-flags.html#-features-rc
+#[cfg(all(feature = "rc", any(feature = "std", feature = "alloc")))]
+impl<T: ?Sized> Serialize for RcWeak<T>
+where
+    T: Serialize,
+{
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        self.upgrade().serialize(serializer)
+    }
+}
+
+/// This impl requires the [`"rc"`] Cargo feature of Serde.
+///
+/// [`"rc"`]: https://serde.rs/feature-flags.html#-features-rc
+#[cfg(all(feature = "rc", any(feature = "std", feature = "alloc")))]
+impl<T: ?Sized> Serialize for ArcWeak<T>
+where
+    T: Serialize,
+{
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        self.upgrade().serialize(serializer)
+    }
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
+macro_rules! nonzero_integers {
+    ( $( $T: ident, )+ ) => {
+        $(
+            #[cfg(num_nonzero)]
+            impl Serialize for num::$T {
+                fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+                where
+                    S: Serializer,
+                {
+                    self.get().serialize(serializer)
+                }
+            }
+        )+
+    }
+}
+
+nonzero_integers! {
+    NonZeroU8,
+    NonZeroU16,
+    NonZeroU32,
+    NonZeroU64,
+    NonZeroUsize,
+}
+
+#[cfg(num_nonzero_signed)]
+nonzero_integers! {
+    NonZeroI8,
+    NonZeroI16,
+    NonZeroI32,
+    NonZeroI64,
+    NonZeroIsize,
+}
+
+// Currently 128-bit integers do not work on Emscripten targets so we need an
+// additional `#[cfg]`
+serde_if_integer128! {
+    nonzero_integers! {
+        NonZeroU128,
+    }
+
+    #[cfg(num_nonzero_signed)]
+    nonzero_integers! {
+        NonZeroI128,
+    }
+}
+
+impl<T> Serialize for Cell<T>
+where
+    T: Serialize + Copy,
+{
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        self.get().serialize(serializer)
+    }
+}
+
+impl<T> Serialize for RefCell<T>
+where
+    T: Serialize,
+{
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        match self.try_borrow() {
+            Ok(value) => value.serialize(serializer),
+            Err(_) => Err(S::Error::custom("already mutably borrowed")),
+        }
+    }
+}
+
+#[cfg(feature = "std")]
+impl<T> Serialize for Mutex<T>
+where
+    T: Serialize,
+{
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        match self.lock() {
+            Ok(locked) => locked.serialize(serializer),
+            Err(_) => Err(S::Error::custom("lock poison error while serializing")),
+        }
+    }
+}
+
+#[cfg(feature = "std")]
+impl<T> Serialize for RwLock<T>
+where
+    T: Serialize,
+{
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        match self.read() {
+            Ok(locked) => locked.serialize(serializer),
+            Err(_) => Err(S::Error::custom("lock poison error while serializing")),
+        }
+    }
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
+impl<T, E> Serialize for Result<T, E>
+where
+    T: Serialize,
+    E: Serialize,
+{
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        match *self {
+            Result::Ok(ref value) => serializer.serialize_newtype_variant("Result", 0, "Ok", value),
+            Result::Err(ref value) => {
+                serializer.serialize_newtype_variant("Result", 1, "Err", value)
+            }
+        }
+    }
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
+#[cfg(any(core_duration, feature = "std"))]
+impl Serialize for Duration {
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        use super::SerializeStruct;
+        let mut state = try!(serializer.serialize_struct("Duration", 2));
+        try!(state.serialize_field("secs", &self.as_secs()));
+        try!(state.serialize_field("nanos", &self.subsec_nanos()));
+        state.end()
+    }
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
+#[cfg(feature = "std")]
+impl Serialize for SystemTime {
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        use super::SerializeStruct;
+        let duration_since_epoch = self
+            .duration_since(UNIX_EPOCH)
+            .expect("SystemTime must be later than UNIX_EPOCH");
+        let mut state = try!(serializer.serialize_struct("SystemTime", 2));
+        try!(state.serialize_field("secs_since_epoch", &duration_since_epoch.as_secs()));
+        try!(state.serialize_field("nanos_since_epoch", &duration_since_epoch.subsec_nanos()));
+        state.end()
+    }
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
+/// Serialize a value that implements `Display` as a string, when that string is
+/// statically known to never have more than a constant `MAX_LEN` bytes.
+///
+/// Panics if the `Display` impl tries to write more than `MAX_LEN` bytes.
+#[cfg(feature = "std")]
+macro_rules! serialize_display_bounded_length {
+    ($value:expr, $max:expr, $serializer:expr) => {{
+        #[allow(deprecated)]
+        let mut buffer: [u8; $max] = unsafe { mem::uninitialized() };
+        let remaining_len = {
+            let mut remaining = &mut buffer[..];
+            write!(remaining, "{}", $value).unwrap();
+            remaining.len()
+        };
+        let written_len = buffer.len() - remaining_len;
+        let written = &buffer[..written_len];
+
+        // write! only provides fmt::Formatter to Display implementations, which
+        // has methods write_str and write_char but no method to write arbitrary
+        // bytes. Therefore `written` must be valid UTF-8.
+        let written_str = unsafe { str::from_utf8_unchecked(written) };
+        $serializer.serialize_str(written_str)
+    }};
+}
+
+#[cfg(feature = "std")]
+impl Serialize for net::IpAddr {
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        if serializer.is_human_readable() {
+            match *self {
+                net::IpAddr::V4(ref a) => a.serialize(serializer),
+                net::IpAddr::V6(ref a) => a.serialize(serializer),
+            }
+        } else {
+            match *self {
+                net::IpAddr::V4(ref a) => {
+                    serializer.serialize_newtype_variant("IpAddr", 0, "V4", a)
+                }
+                net::IpAddr::V6(ref a) => {
+                    serializer.serialize_newtype_variant("IpAddr", 1, "V6", a)
+                }
+            }
+        }
+    }
+}
+
+#[cfg(feature = "std")]
+impl Serialize for net::Ipv4Addr {
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        if serializer.is_human_readable() {
+            const MAX_LEN: usize = 15;
+            debug_assert_eq!(MAX_LEN, "101.102.103.104".len());
+            serialize_display_bounded_length!(self, MAX_LEN, serializer)
+        } else {
+            self.octets().serialize(serializer)
+        }
+    }
+}
+
+#[cfg(feature = "std")]
+impl Serialize for net::Ipv6Addr {
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        if serializer.is_human_readable() {
+            const MAX_LEN: usize = 39;
+            debug_assert_eq!(MAX_LEN, "1001:1002:1003:1004:1005:1006:1007:1008".len());
+            serialize_display_bounded_length!(self, MAX_LEN, serializer)
+        } else {
+            self.octets().serialize(serializer)
+        }
+    }
+}
+
+#[cfg(feature = "std")]
+impl Serialize for net::SocketAddr {
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        if serializer.is_human_readable() {
+            match *self {
+                net::SocketAddr::V4(ref addr) => addr.serialize(serializer),
+                net::SocketAddr::V6(ref addr) => addr.serialize(serializer),
+            }
+        } else {
+            match *self {
+                net::SocketAddr::V4(ref addr) => {
+                    serializer.serialize_newtype_variant("SocketAddr", 0, "V4", addr)
+                }
+                net::SocketAddr::V6(ref addr) => {
+                    serializer.serialize_newtype_variant("SocketAddr", 1, "V6", addr)
+                }
+            }
+        }
+    }
+}
+
+#[cfg(feature = "std")]
+impl Serialize for net::SocketAddrV4 {
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        if serializer.is_human_readable() {
+            const MAX_LEN: usize = 21;
+            debug_assert_eq!(MAX_LEN, "101.102.103.104:65000".len());
+            serialize_display_bounded_length!(self, MAX_LEN, serializer)
+        } else {
+            (self.ip(), self.port()).serialize(serializer)
+        }
+    }
+}
+
+#[cfg(feature = "std")]
+impl Serialize for net::SocketAddrV6 {
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        if serializer.is_human_readable() {
+            const MAX_LEN: usize = 47;
+            debug_assert_eq!(
+                MAX_LEN,
+                "[1001:1002:1003:1004:1005:1006:1007:1008]:65000".len()
+            );
+            serialize_display_bounded_length!(self, MAX_LEN, serializer)
+        } else {
+            (self.ip(), self.port()).serialize(serializer)
+        }
+    }
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
+#[cfg(feature = "std")]
+impl Serialize for Path {
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        match self.to_str() {
+            Some(s) => s.serialize(serializer),
+            None => Err(Error::custom("path contains invalid UTF-8 characters")),
+        }
+    }
+}
+
+#[cfg(feature = "std")]
+impl Serialize for PathBuf {
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        self.as_path().serialize(serializer)
+    }
+}
+
+#[cfg(all(feature = "std", any(unix, windows)))]
+impl Serialize for OsStr {
+    #[cfg(unix)]
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        use std::os::unix::ffi::OsStrExt;
+        serializer.serialize_newtype_variant("OsString", 0, "Unix", self.as_bytes())
+    }
+
+    #[cfg(windows)]
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        use std::os::windows::ffi::OsStrExt;
+        let val = self.encode_wide().collect::<Vec<_>>();
+        serializer.serialize_newtype_variant("OsString", 1, "Windows", &val)
+    }
+}
+
+#[cfg(all(feature = "std", any(unix, windows)))]
+impl Serialize for OsString {
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        self.as_os_str().serialize(serializer)
+    }
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
+#[cfg(feature = "std")]
+impl<T> Serialize for Wrapping<T>
+where
+    T: Serialize,
+{
+    #[inline]
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        self.0.serialize(serializer)
+    }
+}
+
+#[cfg(core_reverse)]
+impl<T> Serialize for Reverse<T>
+where
+    T: Serialize,
+{
+    #[inline]
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        self.0.serialize(serializer)
+    }
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
+#[cfg(all(feature = "std", std_atomic))]
+macro_rules! atomic_impl {
+    ($($ty:ident)*) => {
+        $(
+            impl Serialize for $ty {
+                fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+                where
+                    S: Serializer,
+                {
+                    self.load(Ordering::SeqCst).serialize(serializer)
+                }
+            }
+        )*
+    }
+}
+
+#[cfg(all(feature = "std", std_atomic))]
+atomic_impl! {
+    AtomicBool
+    AtomicI8 AtomicI16 AtomicI32 AtomicIsize
+    AtomicU8 AtomicU16 AtomicU32 AtomicUsize
+}
+
+#[cfg(all(feature = "std", std_atomic64))]
+atomic_impl! {
+    AtomicI64 AtomicU64
+}

serde/src/ser/impossible.rs

@@ -0,0 +1,216 @@
+//! This module contains `Impossible` serializer and its implementations.
+
+use lib::*;
+
+use ser::{
+    self, Serialize, SerializeMap, SerializeSeq, SerializeStruct, SerializeStructVariant,
+    SerializeTuple, SerializeTupleStruct, SerializeTupleVariant,
+};
+
+/// Helper type for implementing a `Serializer` that does not support
+/// serializing one of the compound types.
+///
+/// This type cannot be instantiated, but implements every one of the traits
+/// corresponding to the [`Serializer`] compound types: [`SerializeSeq`],
+/// [`SerializeTuple`], [`SerializeTupleStruct`], [`SerializeTupleVariant`],
+/// [`SerializeMap`], [`SerializeStruct`], and [`SerializeStructVariant`].
+///
+/// ```edition2018
+/// # use serde::ser::{Serializer, Impossible};
+/// # use serde::private::ser::Error;
+/// #
+/// # struct MySerializer;
+/// #
+/// impl Serializer for MySerializer {
+///     type Ok = ();
+///     type Error = Error;
+///
+///     type SerializeSeq = Impossible<(), Error>;
+///     /* other associated types */
+///
+///     /// This data format does not support serializing sequences.
+///     fn serialize_seq(self,
+///                      len: Option<usize>)
+///                      -> Result<Self::SerializeSeq, Error> {
+///         // Given Impossible cannot be instantiated, the only
+///         // thing we can do here is to return an error.
+/// #         stringify! {
+///         Err(...)
+/// #         };
+/// #         unimplemented!()
+///     }
+///
+///     /* other Serializer methods */
+/// #     serde::__serialize_unimplemented! {
+/// #         bool i8 i16 i32 i64 u8 u16 u32 u64 f32 f64 char str bytes none some
+/// #         unit unit_struct unit_variant newtype_struct newtype_variant
+/// #         tuple tuple_struct tuple_variant map struct struct_variant
+/// #     }
+/// }
+/// ```
+///
+/// [`Serializer`]: trait.Serializer.html
+/// [`SerializeSeq`]: trait.SerializeSeq.html
+/// [`SerializeTuple`]: trait.SerializeTuple.html
+/// [`SerializeTupleStruct`]: trait.SerializeTupleStruct.html
+/// [`SerializeTupleVariant`]: trait.SerializeTupleVariant.html
+/// [`SerializeMap`]: trait.SerializeMap.html
+/// [`SerializeStruct`]: trait.SerializeStruct.html
+/// [`SerializeStructVariant`]: trait.SerializeStructVariant.html
+pub struct Impossible<Ok, Error> {
+    void: Void,
+    ok: PhantomData<Ok>,
+    error: PhantomData<Error>,
+}
+
+enum Void {}
+
+impl<Ok, Error> SerializeSeq for Impossible<Ok, Error>
+where
+    Error: ser::Error,
+{
+    type Ok = Ok;
+    type Error = Error;
+
+    fn serialize_element<T: ?Sized>(&mut self, value: &T) -> Result<(), Error>
+    where
+        T: Serialize,
+    {
+        let _ = value;
+        match self.void {}
+    }
+
+    fn end(self) -> Result<Ok, Error> {
+        match self.void {}
+    }
+}
+
+impl<Ok, Error> SerializeTuple for Impossible<Ok, Error>
+where
+    Error: ser::Error,
+{
+    type Ok = Ok;
+    type Error = Error;
+
+    fn serialize_element<T: ?Sized>(&mut self, value: &T) -> Result<(), Error>
+    where
+        T: Serialize,
+    {
+        let _ = value;
+        match self.void {}
+    }
+
+    fn end(self) -> Result<Ok, Error> {
+        match self.void {}
+    }
+}
+
+impl<Ok, Error> SerializeTupleStruct for Impossible<Ok, Error>
+where
+    Error: ser::Error,
+{
+    type Ok = Ok;
+    type Error = Error;
+
+    fn serialize_field<T: ?Sized>(&mut self, value: &T) -> Result<(), Error>
+    where
+        T: Serialize,
+    {
+        let _ = value;
+        match self.void {}
+    }
+
+    fn end(self) -> Result<Ok, Error> {
+        match self.void {}
+    }
+}
+
+impl<Ok, Error> SerializeTupleVariant for Impossible<Ok, Error>
+where
+    Error: ser::Error,
+{
+    type Ok = Ok;
+    type Error = Error;
+
+    fn serialize_field<T: ?Sized>(&mut self, value: &T) -> Result<(), Error>
+    where
+        T: Serialize,
+    {
+        let _ = value;
+        match self.void {}
+    }
+
+    fn end(self) -> Result<Ok, Error> {
+        match self.void {}
+    }
+}
+
+impl<Ok, Error> SerializeMap for Impossible<Ok, Error>
+where
+    Error: ser::Error,
+{
+    type Ok = Ok;
+    type Error = Error;
+
+    fn serialize_key<T: ?Sized>(&mut self, key: &T) -> Result<(), Error>
+    where
+        T: Serialize,
+    {
+        let _ = key;
+        match self.void {}
+    }
+
+    fn serialize_value<T: ?Sized>(&mut self, value: &T) -> Result<(), Error>
+    where
+        T: Serialize,
+    {
+        let _ = value;
+        match self.void {}
+    }
+
+    fn end(self) -> Result<Ok, Error> {
+        match self.void {}
+    }
+}
+
+impl<Ok, Error> SerializeStruct for Impossible<Ok, Error>
+where
+    Error: ser::Error,
+{
+    type Ok = Ok;
+    type Error = Error;
+
+    fn serialize_field<T: ?Sized>(&mut self, key: &'static str, value: &T) -> Result<(), Error>
+    where
+        T: Serialize,
+    {
+        let _ = key;
+        let _ = value;
+        match self.void {}
+    }
+
+    fn end(self) -> Result<Ok, Error> {
+        match self.void {}
+    }
+}
+
+impl<Ok, Error> SerializeStructVariant for Impossible<Ok, Error>
+where
+    Error: ser::Error,
+{
+    type Ok = Ok;
+    type Error = Error;
+
+    fn serialize_field<T: ?Sized>(&mut self, key: &'static str, value: &T) -> Result<(), Error>
+    where
+        T: Serialize,
+    {
+        let _ = key;
+        let _ = value;
+        match self.void {}
+    }
+
+    fn end(self) -> Result<Ok, Error> {
+        match self.void {}
+    }
+}

serde/src/std_error.rs

@@ -0,0 +1,48 @@
+use lib::{Debug, Display};
+
+/// Either a re-export of std::error::Error or a new identical trait, depending
+/// on whether Serde's "std" feature is enabled.
+///
+/// Serde's error traits [`serde::ser::Error`] and [`serde::de::Error`] require
+/// [`std::error::Error`] as a supertrait, but only when Serde is built with
+/// "std" enabled. Data formats that don't care about no\_std support should
+/// generally provide their error types with a `std::error::Error` impl
+/// directly:
+///
+/// ```edition2018
+/// #[derive(Debug)]
+/// struct MySerError {...}
+///
+/// impl serde::ser::Error for MySerError {...}
+///
+/// impl std::fmt::Display for MySerError {...}
+///
+/// // We don't support no_std!
+/// impl std::error::Error for MySerError {}
+/// ```
+///
+/// Data formats that *do* support no\_std may either have a "std" feature of
+/// their own:
+///
+/// ```toml
+/// [features]
+/// std = ["serde/std"]
+/// ```
+///
+/// ```edition2018
+/// #[cfg(feature = "std")]
+/// impl std::error::Error for MySerError {}
+/// ```
+///
+/// ... or else provide the std Error impl unconditionally via Serde's
+/// re-export:
+///
+/// ```edition2018
+/// impl serde::ser::StdError for MySerError {}
+/// ```
+pub trait Error: Debug + Display {
+    /// The underlying cause of this error, if any.
+    fn source(&self) -> Option<&(Error + 'static)> {
+        None
+    }
+}

serde_derive/Cargo.toml

@@ -0,0 +1,32 @@
+[package]
+name = "serde_derive"
+version = "1.0.100" # remember to update html_root_url
+authors = ["Erick Tryzelaar <erick.tryzelaar@gmail.com>", "David Tolnay <dtolnay@gmail.com>"]
+license = "MIT OR Apache-2.0"
+description = "Macros 1.1 implementation of #[derive(Serialize, Deserialize)]"
+homepage = "https://serde.rs"
+repository = "https://github.com/serde-rs/serde"
+documentation = "https://serde.rs/derive.html"
+keywords = ["serde", "serialization", "no_std"]
+readme = "crates-io.md"
+include = ["Cargo.toml", "src/**/*.rs", "crates-io.md", "README.md", "LICENSE-APACHE", "LICENSE-MIT"]
+
+[badges]
+travis-ci = { repository = "serde-rs/serde" }
+appveyor = { repository = "serde-rs/serde" }
+
+[features]
+default = []
+deserialize_in_place = []
+
+[lib]
+name = "serde_derive"
+proc-macro = true
+
+[dependencies]
+proc-macro2 = "1.0"
+quote = "1.0"
+syn = { version = "1.0", features = ["visit"] }
+
+[dev-dependencies]
+serde = { version = "1.0", path = "../serde" }

serde_derive/LICENSE-APACHE

@@ -0,0 +1 @@
+../LICENSE-APACHE

serde_derive/LICENSE-MIT

@@ -0,0 +1 @@
+../LICENSE-MIT

serde_derive/README.md

@@ -0,0 +1 @@
+../README.md

serde_derive/crates-io.md

@@ -0,0 +1 @@
+../crates-io.md

serde_derive/src/bound.rs

@@ -0,0 +1,317 @@
+use std::collections::HashSet;
+
+use syn;
+use syn::punctuated::{Pair, Punctuated};
+use syn::visit::{self, Visit};
+
+use internals::ast::{Container, Data};
+use internals::attr;
+
+use proc_macro2::Span;
+
+// Remove the default from every type parameter because in the generated impls
+// they look like associated types: "error: associated type bindings are not
+// allowed here".
+pub fn without_defaults(generics: &syn::Generics) -> syn::Generics {
+    syn::Generics {
+        params: generics
+            .params
+            .iter()
+            .map(|param| match *param {
+                syn::GenericParam::Type(ref param) => syn::GenericParam::Type(syn::TypeParam {
+                    eq_token: None,
+                    default: None,
+                    ..param.clone()
+                }),
+                _ => param.clone(),
+            })
+            .collect(),
+        ..generics.clone()
+    }
+}
+
+pub fn with_where_predicates(
+    generics: &syn::Generics,
+    predicates: &[syn::WherePredicate],
+) -> syn::Generics {
+    let mut generics = generics.clone();
+    generics
+        .make_where_clause()
+        .predicates
+        .extend(predicates.iter().cloned());
+    generics
+}
+
+pub fn with_where_predicates_from_fields(
+    cont: &Container,
+    generics: &syn::Generics,
+    from_field: fn(&attr::Field) -> Option<&[syn::WherePredicate]>,
+) -> syn::Generics {
+    let predicates = cont
+        .data
+        .all_fields()
+        .flat_map(|field| from_field(&field.attrs))
+        .flat_map(|predicates| predicates.to_vec());
+
+    let mut generics = generics.clone();
+    generics.make_where_clause().predicates.extend(predicates);
+    generics
+}
+
+pub fn with_where_predicates_from_variants(
+    cont: &Container,
+    generics: &syn::Generics,
+    from_variant: fn(&attr::Variant) -> Option<&[syn::WherePredicate]>,
+) -> syn::Generics {
+    let variants = match cont.data {
+        Data::Enum(ref variants) => variants,
+        Data::Struct(_, _) => {
+            return generics.clone();
+        }
+    };
+
+    let predicates = variants
+        .iter()
+        .flat_map(|variant| from_variant(&variant.attrs))
+        .flat_map(|predicates| predicates.to_vec());
+
+    let mut generics = generics.clone();
+    generics.make_where_clause().predicates.extend(predicates);
+    generics
+}
+
+// Puts the given bound on any generic type parameters that are used in fields
+// for which filter returns true.
+//
+// For example, the following struct needs the bound `A: Serialize, B:
+// Serialize`.
+//
+//     struct S<'b, A, B: 'b, C> {
+//         a: A,
+//         b: Option<&'b B>
+//         #[serde(skip_serializing)]
+//         c: C,
+//     }
+pub fn with_bound(
+    cont: &Container,
+    generics: &syn::Generics,
+    filter: fn(&attr::Field, Option<&attr::Variant>) -> bool,
+    bound: &syn::Path,
+) -> syn::Generics {
+    struct FindTyParams<'ast> {
+        // Set of all generic type parameters on the current struct (A, B, C in
+        // the example). Initialized up front.
+        all_type_params: HashSet<syn::Ident>,
+
+        // Set of generic type parameters used in fields for which filter
+        // returns true (A and B in the example). Filled in as the visitor sees
+        // them.
+        relevant_type_params: HashSet<syn::Ident>,
+
+        // Fields whose type is an associated type of one of the generic type
+        // parameters.
+        associated_type_usage: Vec<&'ast syn::TypePath>,
+    }
+    impl<'ast> Visit<'ast> for FindTyParams<'ast> {
+        fn visit_field(&mut self, field: &'ast syn::Field) {
+            if let syn::Type::Path(ref ty) = field.ty {
+                if let Some(Pair::Punctuated(ref t, _)) = ty.path.segments.pairs().next() {
+                    if self.all_type_params.contains(&t.ident) {
+                        self.associated_type_usage.push(ty);
+                    }
+                }
+            }
+            self.visit_type(&field.ty);
+        }
+
+        fn visit_path(&mut self, path: &'ast syn::Path) {
+            if let Some(seg) = path.segments.last() {
+                if seg.ident == "PhantomData" {
+                    // Hardcoded exception, because PhantomData<T> implements
+                    // Serialize and Deserialize whether or not T implements it.
+                    return;
+                }
+            }
+            if path.leading_colon.is_none() && path.segments.len() == 1 {
+                let id = &path.segments[0].ident;
+                if self.all_type_params.contains(id) {
+                    self.relevant_type_params.insert(id.clone());
+                }
+            }
+            visit::visit_path(self, path);
+        }
+
+        // Type parameter should not be considered used by a macro path.
+        //
+        //     struct TypeMacro<T> {
+        //         mac: T!(),
+        //         marker: PhantomData<T>,
+        //     }
+        fn visit_macro(&mut self, _mac: &'ast syn::Macro) {}
+    }
+
+    let all_type_params = generics
+        .type_params()
+        .map(|param| param.ident.clone())
+        .collect();
+
+    let mut visitor = FindTyParams {
+        all_type_params: all_type_params,
+        relevant_type_params: HashSet::new(),
+        associated_type_usage: Vec::new(),
+    };
+    match cont.data {
+        Data::Enum(ref variants) => {
+            for variant in variants.iter() {
+                let relevant_fields = variant
+                    .fields
+                    .iter()
+                    .filter(|field| filter(&field.attrs, Some(&variant.attrs)));
+                for field in relevant_fields {
+                    visitor.visit_field(field.original);
+                }
+            }
+        }
+        Data::Struct(_, ref fields) => {
+            for field in fields.iter().filter(|field| filter(&field.attrs, None)) {
+                visitor.visit_field(field.original);
+            }
+        }
+    }
+
+    let relevant_type_params = visitor.relevant_type_params;
+    let associated_type_usage = visitor.associated_type_usage;
+    let new_predicates = generics
+        .type_params()
+        .map(|param| param.ident.clone())
+        .filter(|id| relevant_type_params.contains(id))
+        .map(|id| syn::TypePath {
+            qself: None,
+            path: id.into(),
+        })
+        .chain(associated_type_usage.into_iter().cloned())
+        .map(|bounded_ty| {
+            syn::WherePredicate::Type(syn::PredicateType {
+                lifetimes: None,
+                // the type parameter that is being bounded e.g. T
+                bounded_ty: syn::Type::Path(bounded_ty),
+                colon_token: <Token![:]>::default(),
+                // the bound e.g. Serialize
+                bounds: vec![syn::TypeParamBound::Trait(syn::TraitBound {
+                    paren_token: None,
+                    modifier: syn::TraitBoundModifier::None,
+                    lifetimes: None,
+                    path: bound.clone(),
+                })]
+                .into_iter()
+                .collect(),
+            })
+        });
+
+    let mut generics = generics.clone();
+    generics
+        .make_where_clause()
+        .predicates
+        .extend(new_predicates);
+    generics
+}
+
+pub fn with_self_bound(
+    cont: &Container,
+    generics: &syn::Generics,
+    bound: &syn::Path,
+) -> syn::Generics {
+    let mut generics = generics.clone();
+    generics
+        .make_where_clause()
+        .predicates
+        .push(syn::WherePredicate::Type(syn::PredicateType {
+            lifetimes: None,
+            // the type that is being bounded e.g. MyStruct<'a, T>
+            bounded_ty: type_of_item(cont),
+            colon_token: <Token![:]>::default(),
+            // the bound e.g. Default
+            bounds: vec![syn::TypeParamBound::Trait(syn::TraitBound {
+                paren_token: None,
+                modifier: syn::TraitBoundModifier::None,
+                lifetimes: None,
+                path: bound.clone(),
+            })]
+            .into_iter()
+            .collect(),
+        }));
+    generics
+}
+
+pub fn with_lifetime_bound(generics: &syn::Generics, lifetime: &str) -> syn::Generics {
+    let bound = syn::Lifetime::new(lifetime, Span::call_site());
+    let def = syn::LifetimeDef {
+        attrs: Vec::new(),
+        lifetime: bound.clone(),
+        colon_token: None,
+        bounds: Punctuated::new(),
+    };
+
+    let params = Some(syn::GenericParam::Lifetime(def))
+        .into_iter()
+        .chain(generics.params.iter().cloned().map(|mut param| {
+            match param {
+                syn::GenericParam::Lifetime(ref mut param) => {
+                    param.bounds.push(bound.clone());
+                }
+                syn::GenericParam::Type(ref mut param) => {
+                    param
+                        .bounds
+                        .push(syn::TypeParamBound::Lifetime(bound.clone()));
+                }
+                syn::GenericParam::Const(_) => {}
+            }
+            param
+        }))
+        .collect();
+
+    syn::Generics {
+        params: params,
+        ..generics.clone()
+    }
+}
+
+fn type_of_item(cont: &Container) -> syn::Type {
+    syn::Type::Path(syn::TypePath {
+        qself: None,
+        path: syn::Path {
+            leading_colon: None,
+            segments: vec![syn::PathSegment {
+                ident: cont.ident.clone(),
+                arguments: syn::PathArguments::AngleBracketed(
+                    syn::AngleBracketedGenericArguments {
+                        colon2_token: None,
+                        lt_token: <Token![<]>::default(),
+                        args: cont
+                            .generics
+                            .params
+                            .iter()
+                            .map(|param| match *param {
+                                syn::GenericParam::Type(ref param) => {
+                                    syn::GenericArgument::Type(syn::Type::Path(syn::TypePath {
+                                        qself: None,
+                                        path: param.ident.clone().into(),
+                                    }))
+                                }
+                                syn::GenericParam::Lifetime(ref param) => {
+                                    syn::GenericArgument::Lifetime(param.lifetime.clone())
+                                }
+                                syn::GenericParam::Const(_) => {
+                                    panic!("Serde does not support const generics yet");
+                                }
+                            })
+                            .collect(),
+                        gt_token: <Token![>]>::default(),
+                    },
+                ),
+            }]
+            .into_iter()
+            .collect(),
+        },
+    })
+}

serde_derive/src/dummy.rs

@@ -0,0 +1,47 @@
+use proc_macro2::{Ident, Span, TokenStream};
+
+use syn;
+use try;
+
+pub fn wrap_in_const(
+    serde_path: Option<&syn::Path>,
+    trait_: &str,
+    ty: &Ident,
+    code: TokenStream,
+) -> TokenStream {
+    let try_replacement = try::replacement();
+
+    let dummy_const = Ident::new(
+        &format!("_IMPL_{}_FOR_{}", trait_, unraw(ty)),
+        Span::call_site(),
+    );
+
+    let use_serde = match serde_path {
+        Some(path) => quote! {
+            use #path as _serde;
+        },
+        None => quote! {
+            #[allow(unknown_lints)]
+            #[cfg_attr(feature = "cargo-clippy", allow(useless_attribute))]
+            #[allow(rust_2018_idioms)]
+            extern crate serde as _serde;
+        },
+    };
+
+    quote! {
+        #[allow(non_upper_case_globals, unused_attributes, unused_qualifications)]
+        const #dummy_const: () = {
+            #use_serde
+            #try_replacement
+            #code
+        };
+    }
+}
+
+#[allow(deprecated)]
+fn unraw(ident: &Ident) -> String {
+    // str::trim_start_matches was added in 1.30, trim_left_matches deprecated
+    // in 1.33. We currently support rustc back to 1.15 so we need to continue
+    // to use the deprecated one.
+    ident.to_string().trim_left_matches("r#").to_owned()
+}

serde_derive/src/fragment.rs

@@ -0,0 +1,74 @@
+use proc_macro2::TokenStream;
+use quote::ToTokens;
+use syn::token;
+
+pub enum Fragment {
+    /// Tokens that can be used as an expression.
+    Expr(TokenStream),
+    /// Tokens that can be used inside a block. The surrounding curly braces are
+    /// not part of these tokens.
+    Block(TokenStream),
+}
+
+macro_rules! quote_expr {
+    ($($tt:tt)*) => {
+        $crate::fragment::Fragment::Expr(quote!($($tt)*))
+    }
+}
+
+macro_rules! quote_block {
+    ($($tt:tt)*) => {
+        $crate::fragment::Fragment::Block(quote!($($tt)*))
+    }
+}
+
+/// Interpolate a fragment in place of an expression. This involves surrounding
+/// Block fragments in curly braces.
+pub struct Expr(pub Fragment);
+impl ToTokens for Expr {
+    fn to_tokens(&self, out: &mut TokenStream) {
+        match self.0 {
+            Fragment::Expr(ref expr) => expr.to_tokens(out),
+            Fragment::Block(ref block) => {
+                token::Brace::default().surround(out, |out| block.to_tokens(out));
+            }
+        }
+    }
+}
+
+/// Interpolate a fragment as the statements of a block.
+pub struct Stmts(pub Fragment);
+impl ToTokens for Stmts {
+    fn to_tokens(&self, out: &mut TokenStream) {
+        match self.0 {
+            Fragment::Expr(ref expr) => expr.to_tokens(out),
+            Fragment::Block(ref block) => block.to_tokens(out),
+        }
+    }
+}
+
+/// Interpolate a fragment as the value part of a `match` expression. This
+/// involves putting a comma after expressions and curly braces around blocks.
+pub struct Match(pub Fragment);
+impl ToTokens for Match {
+    fn to_tokens(&self, out: &mut TokenStream) {
+        match self.0 {
+            Fragment::Expr(ref expr) => {
+                expr.to_tokens(out);
+                <Token![,]>::default().to_tokens(out);
+            }
+            Fragment::Block(ref block) => {
+                token::Brace::default().surround(out, |out| block.to_tokens(out));
+            }
+        }
+    }
+}
+
+impl AsRef<TokenStream> for Fragment {
+    fn as_ref(&self) -> &TokenStream {
+        match *self {
+            Fragment::Expr(ref expr) => expr,
+            Fragment::Block(ref block) => block,
+        }
+    }
+}

serde_derive/src/internals/ast.rs

@@ -0,0 +1,204 @@
+//! A Serde ast, parsed from the Syn ast and ready to generate Rust code.
+
+use internals::attr;
+use internals::check;
+use internals::{Ctxt, Derive};
+use syn;
+use syn::punctuated::Punctuated;
+
+/// A source data structure annotated with `#[derive(Serialize)]` and/or `#[derive(Deserialize)]`,
+/// parsed into an internal representation.
+pub struct Container<'a> {
+    /// The struct or enum name (without generics).
+    pub ident: syn::Ident,
+    /// Attributes on the structure, parsed for Serde.
+    pub attrs: attr::Container,
+    /// The contents of the struct or enum.
+    pub data: Data<'a>,
+    /// Any generics on the struct or enum.
+    pub generics: &'a syn::Generics,
+    /// Original input.
+    pub original: &'a syn::DeriveInput,
+}
+
+/// The fields of a struct or enum.
+///
+/// Analagous to `syn::Data`.
+pub enum Data<'a> {
+    Enum(Vec<Variant<'a>>),
+    Struct(Style, Vec<Field<'a>>),
+}
+
+/// A variant of an enum.
+pub struct Variant<'a> {
+    pub ident: syn::Ident,
+    pub attrs: attr::Variant,
+    pub style: Style,
+    pub fields: Vec<Field<'a>>,
+    pub original: &'a syn::Variant,
+}
+
+/// A field of a struct.
+pub struct Field<'a> {
+    pub member: syn::Member,
+    pub attrs: attr::Field,
+    pub ty: &'a syn::Type,
+    pub original: &'a syn::Field,
+}
+
+#[derive(Copy, Clone)]
+pub enum Style {
+    /// Named fields.
+    Struct,
+    /// Many unnamed fields.
+    Tuple,
+    /// One unnamed field.
+    Newtype,
+    /// No fields.
+    Unit,
+}
+
+impl<'a> Container<'a> {
+    /// Convert the raw Syn ast into a parsed container object, collecting errors in `cx`.
+    pub fn from_ast(
+        cx: &Ctxt,
+        item: &'a syn::DeriveInput,
+        derive: Derive,
+    ) -> Option<Container<'a>> {
+        let mut attrs = attr::Container::from_ast(cx, item);
+
+        let mut data = match item.data {
+            syn::Data::Enum(ref data) => {
+                Data::Enum(enum_from_ast(cx, &data.variants, attrs.default()))
+            }
+            syn::Data::Struct(ref data) => {
+                let (style, fields) = struct_from_ast(cx, &data.fields, None, attrs.default());
+                Data::Struct(style, fields)
+            }
+            syn::Data::Union(_) => {
+                cx.error_spanned_by(item, "Serde does not support derive for unions");
+                return None;
+            }
+        };
+
+        let mut has_flatten = false;
+        match data {
+            Data::Enum(ref mut variants) => {
+                for variant in variants {
+                    variant.attrs.rename_by_rules(attrs.rename_all_rules());
+                    for field in &mut variant.fields {
+                        if field.attrs.flatten() {
+                            has_flatten = true;
+                        }
+                        field
+                            .attrs
+                            .rename_by_rules(variant.attrs.rename_all_rules());
+                    }
+                }
+            }
+            Data::Struct(_, ref mut fields) => {
+                for field in fields {
+                    if field.attrs.flatten() {
+                        has_flatten = true;
+                    }
+                    field.attrs.rename_by_rules(attrs.rename_all_rules());
+                }
+            }
+        }
+
+        if has_flatten {
+            attrs.mark_has_flatten();
+        }
+
+        let mut item = Container {
+            ident: item.ident.clone(),
+            attrs: attrs,
+            data: data,
+            generics: &item.generics,
+            original: item,
+        };
+        check::check(cx, &mut item, derive);
+        Some(item)
+    }
+}
+
+impl<'a> Data<'a> {
+    pub fn all_fields(&'a self) -> Box<Iterator<Item = &'a Field<'a>> + 'a> {
+        match *self {
+            Data::Enum(ref variants) => {
+                Box::new(variants.iter().flat_map(|variant| variant.fields.iter()))
+            }
+            Data::Struct(_, ref fields) => Box::new(fields.iter()),
+        }
+    }
+
+    pub fn has_getter(&self) -> bool {
+        self.all_fields().any(|f| f.attrs.getter().is_some())
+    }
+}
+
+fn enum_from_ast<'a>(
+    cx: &Ctxt,
+    variants: &'a Punctuated<syn::Variant, Token![,]>,
+    container_default: &attr::Default,
+) -> Vec<Variant<'a>> {
+    variants
+        .iter()
+        .map(|variant| {
+            let attrs = attr::Variant::from_ast(cx, variant);
+            let (style, fields) =
+                struct_from_ast(cx, &variant.fields, Some(&attrs), container_default);
+            Variant {
+                ident: variant.ident.clone(),
+                attrs: attrs,
+                style: style,
+                fields: fields,
+                original: variant,
+            }
+        })
+        .collect()
+}
+
+fn struct_from_ast<'a>(
+    cx: &Ctxt,
+    fields: &'a syn::Fields,
+    attrs: Option<&attr::Variant>,
+    container_default: &attr::Default,
+) -> (Style, Vec<Field<'a>>) {
+    match *fields {
+        syn::Fields::Named(ref fields) => (
+            Style::Struct,
+            fields_from_ast(cx, &fields.named, attrs, container_default),
+        ),
+        syn::Fields::Unnamed(ref fields) if fields.unnamed.len() == 1 => (
+            Style::Newtype,
+            fields_from_ast(cx, &fields.unnamed, attrs, container_default),
+        ),
+        syn::Fields::Unnamed(ref fields) => (
+            Style::Tuple,
+            fields_from_ast(cx, &fields.unnamed, attrs, container_default),
+        ),
+        syn::Fields::Unit => (Style::Unit, Vec::new()),
+    }
+}
+
+fn fields_from_ast<'a>(
+    cx: &Ctxt,
+    fields: &'a Punctuated<syn::Field, Token![,]>,
+    attrs: Option<&attr::Variant>,
+    container_default: &attr::Default,
+) -> Vec<Field<'a>> {
+    fields
+        .iter()
+        .enumerate()
+        .map(|(i, field)| Field {
+            member: match field.ident {
+                Some(ref ident) => syn::Member::Named(ident.clone()),
+                None => syn::Member::Unnamed(i.into()),
+            },
+            attrs: attr::Field::from_ast(cx, i, field, attrs, container_default),
+            ty: &field.ty,
+            original: field,
+        })
+        .collect()
+}

serde_derive/src/internals/case.rs

@@ -0,0 +1,174 @@
+//! Code to convert the Rust-styled field/variant (e.g. `my_field`, `MyType`) to the
+//! case of the source (e.g. `my-field`, `MY_FIELD`).
+
+// See https://users.rust-lang.org/t/psa-dealing-with-warning-unused-import-std-ascii-asciiext-in-today-s-nightly/13726
+#[allow(deprecated, unused_imports)]
+use std::ascii::AsciiExt;
+
+use std::str::FromStr;
+
+use self::RenameRule::*;
+
+/// The different possible ways to change case of fields in a struct, or variants in an enum.
+#[derive(Copy, Clone, PartialEq)]
+pub enum RenameRule {
+    /// Don't apply a default rename rule.
+    None,
+    /// Rename direct children to "lowercase" style.
+    LowerCase,
+    /// Rename direct children to "UPPERCASE" style.
+    UPPERCASE,
+    /// Rename direct children to "PascalCase" style, as typically used for
+    /// enum variants.
+    PascalCase,
+    /// Rename direct children to "camelCase" style.
+    CamelCase,
+    /// Rename direct children to "snake_case" style, as commonly used for
+    /// fields.
+    SnakeCase,
+    /// Rename direct children to "SCREAMING_SNAKE_CASE" style, as commonly
+    /// used for constants.
+    ScreamingSnakeCase,
+    /// Rename direct children to "kebab-case" style.
+    KebabCase,
+    /// Rename direct children to "SCREAMING-KEBAB-CASE" style.
+    ScreamingKebabCase,
+}
+
+impl RenameRule {
+    /// Apply a renaming rule to an enum variant, returning the version expected in the source.
+    pub fn apply_to_variant(&self, variant: &str) -> String {
+        match *self {
+            None | PascalCase => variant.to_owned(),
+            LowerCase => variant.to_ascii_lowercase(),
+            UPPERCASE => variant.to_ascii_uppercase(),
+            CamelCase => variant[..1].to_ascii_lowercase() + &variant[1..],
+            SnakeCase => {
+                let mut snake = String::new();
+                for (i, ch) in variant.char_indices() {
+                    if i > 0 && ch.is_uppercase() {
+                        snake.push('_');
+                    }
+                    snake.push(ch.to_ascii_lowercase());
+                }
+                snake
+            }
+            ScreamingSnakeCase => SnakeCase.apply_to_variant(variant).to_ascii_uppercase(),
+            KebabCase => SnakeCase.apply_to_variant(variant).replace('_', "-"),
+            ScreamingKebabCase => ScreamingSnakeCase
+                .apply_to_variant(variant)
+                .replace('_', "-"),
+        }
+    }
+
+    /// Apply a renaming rule to a struct field, returning the version expected in the source.
+    pub fn apply_to_field(&self, field: &str) -> String {
+        match *self {
+            None | LowerCase | SnakeCase => field.to_owned(),
+            UPPERCASE => field.to_ascii_uppercase(),
+            PascalCase => {
+                let mut pascal = String::new();
+                let mut capitalize = true;
+                for ch in field.chars() {
+                    if ch == '_' {
+                        capitalize = true;
+                    } else if capitalize {
+                        pascal.push(ch.to_ascii_uppercase());
+                        capitalize = false;
+                    } else {
+                        pascal.push(ch);
+                    }
+                }
+                pascal
+            }
+            CamelCase => {
+                let pascal = PascalCase.apply_to_field(field);
+                pascal[..1].to_ascii_lowercase() + &pascal[1..]
+            }
+            ScreamingSnakeCase => field.to_ascii_uppercase(),
+            KebabCase => field.replace('_', "-"),
+            ScreamingKebabCase => ScreamingSnakeCase.apply_to_field(field).replace('_', "-"),
+        }
+    }
+}
+
+impl FromStr for RenameRule {
+    type Err = ();
+
+    fn from_str(rename_all_str: &str) -> Result<Self, Self::Err> {
+        match rename_all_str {
+            "lowercase" => Ok(LowerCase),
+            "UPPERCASE" => Ok(UPPERCASE),
+            "PascalCase" => Ok(PascalCase),
+            "camelCase" => Ok(CamelCase),
+            "snake_case" => Ok(SnakeCase),
+            "SCREAMING_SNAKE_CASE" => Ok(ScreamingSnakeCase),
+            "kebab-case" => Ok(KebabCase),
+            "SCREAMING-KEBAB-CASE" => Ok(ScreamingKebabCase),
+            _ => Err(()),
+        }
+    }
+}
+
+#[test]
+fn rename_variants() {
+    for &(original, lower, upper, camel, snake, screaming, kebab, screaming_kebab) in &[
+        (
+            "Outcome", "outcome", "OUTCOME", "outcome", "outcome", "OUTCOME", "outcome", "OUTCOME",
+        ),
+        (
+            "VeryTasty",
+            "verytasty",
+            "VERYTASTY",
+            "veryTasty",
+            "very_tasty",
+            "VERY_TASTY",
+            "very-tasty",
+            "VERY-TASTY",
+        ),
+        ("A", "a", "A", "a", "a", "A", "a", "A"),
+        ("Z42", "z42", "Z42", "z42", "z42", "Z42", "z42", "Z42"),
+    ] {
+        assert_eq!(None.apply_to_variant(original), original);
+        assert_eq!(LowerCase.apply_to_variant(original), lower);
+        assert_eq!(UPPERCASE.apply_to_variant(original), upper);
+        assert_eq!(PascalCase.apply_to_variant(original), original);
+        assert_eq!(CamelCase.apply_to_variant(original), camel);
+        assert_eq!(SnakeCase.apply_to_variant(original), snake);
+        assert_eq!(ScreamingSnakeCase.apply_to_variant(original), screaming);
+        assert_eq!(KebabCase.apply_to_variant(original), kebab);
+        assert_eq!(
+            ScreamingKebabCase.apply_to_variant(original),
+            screaming_kebab
+        );
+    }
+}
+
+#[test]
+fn rename_fields() {
+    for &(original, upper, pascal, camel, screaming, kebab, screaming_kebab) in &[
+        (
+            "outcome", "OUTCOME", "Outcome", "outcome", "OUTCOME", "outcome", "OUTCOME",
+        ),
+        (
+            "very_tasty",
+            "VERY_TASTY",
+            "VeryTasty",
+            "veryTasty",
+            "VERY_TASTY",
+            "very-tasty",
+            "VERY-TASTY",
+        ),
+        ("a", "A", "A", "a", "A", "a", "A"),
+        ("z42", "Z42", "Z42", "z42", "Z42", "z42", "Z42"),
+    ] {
+        assert_eq!(None.apply_to_field(original), original);
+        assert_eq!(UPPERCASE.apply_to_field(original), upper);
+        assert_eq!(PascalCase.apply_to_field(original), pascal);
+        assert_eq!(CamelCase.apply_to_field(original), camel);
+        assert_eq!(SnakeCase.apply_to_field(original), original);
+        assert_eq!(ScreamingSnakeCase.apply_to_field(original), screaming);
+        assert_eq!(KebabCase.apply_to_field(original), kebab);
+        assert_eq!(ScreamingKebabCase.apply_to_field(original), screaming_kebab);
+    }
+}

serde_derive/src/internals/check.rs

@@ -0,0 +1,429 @@
+use internals::ast::{Container, Data, Field, Style};
+use internals::attr::{Identifier, TagType};
+use internals::{Ctxt, Derive};
+use syn::{Member, Type};
+
+/// Cross-cutting checks that require looking at more than a single attrs
+/// object. Simpler checks should happen when parsing and building the attrs.
+pub fn check(cx: &Ctxt, cont: &mut Container, derive: Derive) {
+    check_getter(cx, cont);
+    check_flatten(cx, cont);
+    check_identifier(cx, cont);
+    check_variant_skip_attrs(cx, cont);
+    check_internal_tag_field_name_conflict(cx, cont);
+    check_adjacent_tag_conflict(cx, cont);
+    check_transparent(cx, cont, derive);
+    check_from_and_try_from(cx, cont);
+}
+
+/// Getters are only allowed inside structs (not enums) with the `remote`
+/// attribute.
+fn check_getter(cx: &Ctxt, cont: &Container) {
+    match cont.data {
+        Data::Enum(_) => {
+            if cont.data.has_getter() {
+                cx.error_spanned_by(
+                    cont.original,
+                    "#[serde(getter = \"...\")] is not allowed in an enum",
+                );
+            }
+        }
+        Data::Struct(_, _) => {
+            if cont.data.has_getter() && cont.attrs.remote().is_none() {
+                cx.error_spanned_by(
+                    cont.original,
+                    "#[serde(getter = \"...\")] can only be used in structs \
+                     that have #[serde(remote = \"...\")]",
+                );
+            }
+        }
+    }
+}
+
+/// Flattening has some restrictions we can test.
+fn check_flatten(cx: &Ctxt, cont: &Container) {
+    match cont.data {
+        Data::Enum(ref variants) => {
+            for variant in variants {
+                for field in &variant.fields {
+                    check_flatten_field(cx, variant.style, field);
+                }
+            }
+        }
+        Data::Struct(style, ref fields) => {
+            for field in fields {
+                check_flatten_field(cx, style, field);
+            }
+        }
+    }
+}
+
+fn check_flatten_field(cx: &Ctxt, style: Style, field: &Field) {
+    if !field.attrs.flatten() {
+        return;
+    }
+    match style {
+        Style::Tuple => {
+            cx.error_spanned_by(
+                field.original,
+                "#[serde(flatten)] cannot be used on tuple structs",
+            );
+        }
+        Style::Newtype => {
+            cx.error_spanned_by(
+                field.original,
+                "#[serde(flatten)] cannot be used on newtype structs",
+            );
+        }
+        _ => {}
+    }
+}
+
+/// The `other` attribute must be used at most once and it must be the last
+/// variant of an enum.
+///
+/// Inside a `variant_identifier` all variants must be unit variants. Inside a
+/// `field_identifier` all but possibly one variant must be unit variants. The
+/// last variant may be a newtype variant which is an implicit "other" case.
+fn check_identifier(cx: &Ctxt, cont: &Container) {
+    let variants = match cont.data {
+        Data::Enum(ref variants) => variants,
+        Data::Struct(_, _) => {
+            return;
+        }
+    };
+
+    for (i, variant) in variants.iter().enumerate() {
+        match (
+            variant.style,
+            cont.attrs.identifier(),
+            variant.attrs.other(),
+            cont.attrs.tag(),
+        ) {
+            // The `other` attribute may not be used in a variant_identifier.
+            (_, Identifier::Variant, true, _) => {
+                cx.error_spanned_by(
+                    variant.original,
+                    "#[serde(other)] may not be used on a variant identifier",
+                );
+            }
+
+            // Variant with `other` attribute cannot appear in untagged enum
+            (_, Identifier::No, true, &TagType::None) => {
+                cx.error_spanned_by(
+                    variant.original,
+                    "#[serde(other)] cannot appear on untagged enum",
+                );
+            }
+
+            // Variant with `other` attribute must be the last one.
+            (Style::Unit, Identifier::Field, true, _) | (Style::Unit, Identifier::No, true, _) => {
+                if i < variants.len() - 1 {
+                    cx.error_spanned_by(
+                        variant.original,
+                        "#[serde(other)] must be on the last variant",
+                    );
+                }
+            }
+
+            // Variant with `other` attribute must be a unit variant.
+            (_, Identifier::Field, true, _) | (_, Identifier::No, true, _) => {
+                cx.error_spanned_by(
+                    variant.original,
+                    "#[serde(other)] must be on a unit variant",
+                );
+            }
+
+            // Any sort of variant is allowed if this is not an identifier.
+            (_, Identifier::No, false, _) => {}
+
+            // Unit variant without `other` attribute is always fine.
+            (Style::Unit, _, false, _) => {}
+
+            // The last field is allowed to be a newtype catch-all.
+            (Style::Newtype, Identifier::Field, false, _) => {
+                if i < variants.len() - 1 {
+                    cx.error_spanned_by(
+                        variant.original,
+                        format!("`{}` must be the last variant", variant.ident),
+                    );
+                }
+            }
+
+            (_, Identifier::Field, false, _) => {
+                cx.error_spanned_by(
+                    variant.original,
+                    "#[serde(field_identifier)] may only contain unit variants",
+                );
+            }
+
+            (_, Identifier::Variant, false, _) => {
+                cx.error_spanned_by(
+                    variant.original,
+                    "#[serde(variant_identifier)] may only contain unit variants",
+                );
+            }
+        }
+    }
+}
+
+/// Skip-(de)serializing attributes are not allowed on variants marked
+/// (de)serialize_with.
+fn check_variant_skip_attrs(cx: &Ctxt, cont: &Container) {
+    let variants = match cont.data {
+        Data::Enum(ref variants) => variants,
+        Data::Struct(_, _) => {
+            return;
+        }
+    };
+
+    for variant in variants.iter() {
+        if variant.attrs.serialize_with().is_some() {
+            if variant.attrs.skip_serializing() {
+                cx.error_spanned_by(
+                    variant.original,
+                    format!(
+                        "variant `{}` cannot have both #[serde(serialize_with)] and \
+                         #[serde(skip_serializing)]",
+                        variant.ident
+                    ),
+                );
+            }
+
+            for field in &variant.fields {
+                let member = member_message(&field.member);
+
+                if field.attrs.skip_serializing() {
+                    cx.error_spanned_by(
+                        variant.original,
+                        format!(
+                            "variant `{}` cannot have both #[serde(serialize_with)] and \
+                             a field {} marked with #[serde(skip_serializing)]",
+                            variant.ident, member
+                        ),
+                    );
+                }
+
+                if field.attrs.skip_serializing_if().is_some() {
+                    cx.error_spanned_by(
+                        variant.original,
+                        format!(
+                            "variant `{}` cannot have both #[serde(serialize_with)] and \
+                             a field {} marked with #[serde(skip_serializing_if)]",
+                            variant.ident, member
+                        ),
+                    );
+                }
+            }
+        }
+
+        if variant.attrs.deserialize_with().is_some() {
+            if variant.attrs.skip_deserializing() {
+                cx.error_spanned_by(
+                    variant.original,
+                    format!(
+                        "variant `{}` cannot have both #[serde(deserialize_with)] and \
+                         #[serde(skip_deserializing)]",
+                        variant.ident
+                    ),
+                );
+            }
+
+            for field in &variant.fields {
+                if field.attrs.skip_deserializing() {
+                    let member = member_message(&field.member);
+
+                    cx.error_spanned_by(
+                        variant.original,
+                        format!(
+                            "variant `{}` cannot have both #[serde(deserialize_with)] \
+                             and a field {} marked with #[serde(skip_deserializing)]",
+                            variant.ident, member
+                        ),
+                    );
+                }
+            }
+        }
+    }
+}
+
+/// The tag of an internally-tagged struct variant must not be
+/// the same as either one of its fields, as this would result in
+/// duplicate keys in the serialized output and/or ambiguity in
+/// the to-be-deserialized input.
+fn check_internal_tag_field_name_conflict(cx: &Ctxt, cont: &Container) {
+    let variants = match cont.data {
+        Data::Enum(ref variants) => variants,
+        Data::Struct(_, _) => return,
+    };
+
+    let tag = match *cont.attrs.tag() {
+        TagType::Internal { ref tag } => tag.as_str(),
+        TagType::External | TagType::Adjacent { .. } | TagType::None => return,
+    };
+
+    let diagnose_conflict = || {
+        cx.error_spanned_by(
+            cont.original,
+            format!("variant field name `{}` conflicts with internal tag", tag),
+        )
+    };
+
+    for variant in variants {
+        match variant.style {
+            Style::Struct => {
+                for field in &variant.fields {
+                    let check_ser = !field.attrs.skip_serializing();
+                    let check_de = !field.attrs.skip_deserializing();
+                    let name = field.attrs.name();
+                    let ser_name = name.serialize_name();
+
+                    if check_ser && ser_name == tag {
+                        diagnose_conflict();
+                        return;
+                    }
+
+                    for de_name in field.attrs.aliases() {
+                        if check_de && de_name == tag {
+                            diagnose_conflict();
+                            return;
+                        }
+                    }
+                }
+            }
+            Style::Unit | Style::Newtype | Style::Tuple => {}
+        }
+    }
+}
+
+/// In the case of adjacently-tagged enums, the type and the
+/// contents tag must differ, for the same reason.
+fn check_adjacent_tag_conflict(cx: &Ctxt, cont: &Container) {
+    let (type_tag, content_tag) = match *cont.attrs.tag() {
+        TagType::Adjacent {
+            ref tag,
+            ref content,
+        } => (tag, content),
+        TagType::Internal { .. } | TagType::External | TagType::None => return,
+    };
+
+    if type_tag == content_tag {
+        cx.error_spanned_by(
+            cont.original,
+            format!(
+                "enum tags `{}` for type and content conflict with each other",
+                type_tag
+            ),
+        );
+    }
+}
+
+/// Enums and unit structs cannot be transparent.
+fn check_transparent(cx: &Ctxt, cont: &mut Container, derive: Derive) {
+    if !cont.attrs.transparent() {
+        return;
+    }
+
+    if cont.attrs.type_from().is_some() {
+        cx.error_spanned_by(
+            cont.original,
+            "#[serde(transparent)] is not allowed with #[serde(from = \"...\")]",
+        );
+    }
+
+    if cont.attrs.type_try_from().is_some() {
+        cx.error_spanned_by(
+            cont.original,
+            "#[serde(transparent)] is not allowed with #[serde(try_from = \"...\")]",
+        );
+    }
+
+    if cont.attrs.type_into().is_some() {
+        cx.error_spanned_by(
+            cont.original,
+            "#[serde(transparent)] is not allowed with #[serde(into = \"...\")]",
+        );
+    }
+
+    let fields = match cont.data {
+        Data::Enum(_) => {
+            cx.error_spanned_by(
+                cont.original,
+                "#[serde(transparent)] is not allowed on an enum",
+            );
+            return;
+        }
+        Data::Struct(Style::Unit, _) => {
+            cx.error_spanned_by(
+                cont.original,
+                "#[serde(transparent)] is not allowed on a unit struct",
+            );
+            return;
+        }
+        Data::Struct(_, ref mut fields) => fields,
+    };
+
+    let mut transparent_field = None;
+
+    for field in fields {
+        if allow_transparent(field, derive) {
+            if transparent_field.is_some() {
+                cx.error_spanned_by(
+                    cont.original,
+                    "#[serde(transparent)] requires struct to have at most one transparent field",
+                );
+                return;
+            }
+            transparent_field = Some(field);
+        }
+    }
+
+    match transparent_field {
+        Some(transparent_field) => transparent_field.attrs.mark_transparent(),
+        None => match derive {
+            Derive::Serialize => {
+                cx.error_spanned_by(
+                    cont.original,
+                    "#[serde(transparent)] requires at least one field that is not skipped",
+                );
+            }
+            Derive::Deserialize => {
+                cx.error_spanned_by(
+                    cont.original,
+                    "#[serde(transparent)] requires at least one field that is neither skipped nor has a default",
+                );
+            }
+        },
+    }
+}
+
+fn member_message(member: &Member) -> String {
+    match *member {
+        Member::Named(ref ident) => format!("`{}`", ident),
+        Member::Unnamed(ref i) => format!("#{}", i.index),
+    }
+}
+
+fn allow_transparent(field: &Field, derive: Derive) -> bool {
+    if let Type::Path(ref ty) = *field.ty {
+        if let Some(seg) = ty.path.segments.last() {
+            if seg.ident == "PhantomData" {
+                return false;
+            }
+        }
+    }
+
+    match derive {
+        Derive::Serialize => !field.attrs.skip_serializing(),
+        Derive::Deserialize => !field.attrs.skip_deserializing() && field.attrs.default().is_none(),
+    }
+}
+
+fn check_from_and_try_from(cx: &Ctxt, cont: &mut Container) {
+    if cont.attrs.type_from().is_some() && cont.attrs.type_try_from().is_some() {
+        cx.error_spanned_by(
+            cont.original,
+            "#[serde(from = \"...\")] and #[serde(try_from = \"...\")] conflict with each other",
+        );
+    }
+}

serde_derive/src/internals/ctxt.rs

@@ -0,0 +1,57 @@
+use quote::ToTokens;
+use std::cell::RefCell;
+use std::fmt::Display;
+use std::thread;
+use syn;
+
+/// A type to collect errors together and format them.
+///
+/// Dropping this object will cause a panic. It must be consumed using `check`.
+///
+/// References can be shared since this type uses run-time exclusive mut checking.
+#[derive(Default)]
+pub struct Ctxt {
+    // The contents will be set to `None` during checking. This is so that checking can be
+    // enforced.
+    errors: RefCell<Option<Vec<syn::Error>>>,
+}
+
+impl Ctxt {
+    /// Create a new context object.
+    ///
+    /// This object contains no errors, but will still trigger a panic if it is not `check`ed.
+    pub fn new() -> Self {
+        Ctxt {
+            errors: RefCell::new(Some(Vec::new())),
+        }
+    }
+
+    /// Add an error to the context object with a tokenenizable object.
+    ///
+    /// The object is used for spanning in error messages.
+    pub fn error_spanned_by<A: ToTokens, T: Display>(&self, obj: A, msg: T) {
+        self.errors
+            .borrow_mut()
+            .as_mut()
+            .unwrap()
+            // Curb monomorphization from generating too many identical methods.
+            .push(syn::Error::new_spanned(obj.into_token_stream(), msg));
+    }
+
+    /// Consume this object, producing a formatted error string if there are errors.
+    pub fn check(self) -> Result<(), Vec<syn::Error>> {
+        let errors = self.errors.borrow_mut().take().unwrap();
+        match errors.len() {
+            0 => Ok(()),
+            _ => Err(errors),
+        }
+    }
+}
+
+impl Drop for Ctxt {
+    fn drop(&mut self) {
+        if !thread::panicking() && self.errors.borrow().is_some() {
+            panic!("forgot to check for errors");
+        }
+    }
+}

serde_derive/src/internals/mod.rs

@@ -0,0 +1,15 @@
+pub mod ast;
+pub mod attr;
+
+mod ctxt;
+pub use self::ctxt::Ctxt;
+
+mod case;
+mod check;
+mod symbol;
+
+#[derive(Copy, Clone)]
+pub enum Derive {
+    Serialize,
+    Deserialize,
+}

serde_derive/src/internals/symbol.rs

@@ -0,0 +1,67 @@
+use std::fmt::{self, Display};
+use syn::{Ident, Path};
+
+#[derive(Copy, Clone)]
+pub struct Symbol(&'static str);
+
+pub const ALIAS: Symbol = Symbol("alias");
+pub const BORROW: Symbol = Symbol("borrow");
+pub const BOUND: Symbol = Symbol("bound");
+pub const CONTENT: Symbol = Symbol("content");
+pub const CRATE: Symbol = Symbol("crate");
+pub const DEFAULT: Symbol = Symbol("default");
+pub const DENY_UNKNOWN_FIELDS: Symbol = Symbol("deny_unknown_fields");
+pub const DESERIALIZE: Symbol = Symbol("deserialize");
+pub const DESERIALIZE_WITH: Symbol = Symbol("deserialize_with");
+pub const FIELD_IDENTIFIER: Symbol = Symbol("field_identifier");
+pub const FLATTEN: Symbol = Symbol("flatten");
+pub const FROM: Symbol = Symbol("from");
+pub const GETTER: Symbol = Symbol("getter");
+pub const INTO: Symbol = Symbol("into");
+pub const OTHER: Symbol = Symbol("other");
+pub const REMOTE: Symbol = Symbol("remote");
+pub const RENAME: Symbol = Symbol("rename");
+pub const RENAME_ALL: Symbol = Symbol("rename_all");
+pub const SERDE: Symbol = Symbol("serde");
+pub const SERIALIZE: Symbol = Symbol("serialize");
+pub const SERIALIZE_WITH: Symbol = Symbol("serialize_with");
+pub const SKIP: Symbol = Symbol("skip");
+pub const SKIP_DESERIALIZING: Symbol = Symbol("skip_deserializing");
+pub const SKIP_SERIALIZING: Symbol = Symbol("skip_serializing");
+pub const SKIP_SERIALIZING_IF: Symbol = Symbol("skip_serializing_if");
+pub const TAG: Symbol = Symbol("tag");
+pub const TRANSPARENT: Symbol = Symbol("transparent");
+pub const TRY_FROM: Symbol = Symbol("try_from");
+pub const UNTAGGED: Symbol = Symbol("untagged");
+pub const VARIANT_IDENTIFIER: Symbol = Symbol("variant_identifier");
+pub const WITH: Symbol = Symbol("with");
+
+impl PartialEq<Symbol> for Ident {
+    fn eq(&self, word: &Symbol) -> bool {
+        self == word.0
+    }
+}
+
+impl<'a> PartialEq<Symbol> for &'a Ident {
+    fn eq(&self, word: &Symbol) -> bool {
+        *self == word.0
+    }
+}
+
+impl PartialEq<Symbol> for Path {
+    fn eq(&self, word: &Symbol) -> bool {
+        self.is_ident(word.0)
+    }
+}
+
+impl<'a> PartialEq<Symbol> for &'a Path {
+    fn eq(&self, word: &Symbol) -> bool {
+        self.is_ident(word.0)
+    }
+}
+
+impl Display for Symbol {
+    fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+        formatter.write_str(self.0)
+    }
+}

serde_derive/src/lib.rs

@@ -0,0 +1,98 @@
+//! This crate provides Serde's two derive macros.
+//!
+//! ```edition2018
+//! # use serde_derive::{Serialize, Deserialize};
+//! #
+//! #[derive(Serialize, Deserialize)]
+//! # struct S;
+//! #
+//! # fn main() {}
+//! ```
+//!
+//! Please refer to [https://serde.rs/derive.html] for how to set this up.
+//!
+//! [https://serde.rs/derive.html]: https://serde.rs/derive.html
+
+#![doc(html_root_url = "https://docs.rs/serde_derive/1.0.100")]
+#![allow(unknown_lints, bare_trait_objects)]
+#![cfg_attr(feature = "cargo-clippy", allow(renamed_and_removed_lints))]
+#![cfg_attr(feature = "cargo-clippy", deny(clippy, clippy_pedantic))]
+// Ignored clippy lints
+#![cfg_attr(
+    feature = "cargo-clippy",
+    allow(
+        cognitive_complexity,
+        enum_variant_names,
+        needless_pass_by_value,
+        redundant_field_names,
+        too_many_arguments,
+        trivially_copy_pass_by_ref,
+        used_underscore_binding,
+    )
+)]
+// Ignored clippy_pedantic lints
+#![cfg_attr(
+    feature = "cargo-clippy",
+    allow(
+        cast_possible_truncation,
+        checked_conversions,
+        doc_markdown,
+        enum_glob_use,
+        filter_map,
+        indexing_slicing,
+        items_after_statements,
+        match_same_arms,
+        module_name_repetitions,
+        similar_names,
+        single_match_else,
+        unseparated_literal_suffix,
+        use_self,
+    )
+)]
+// The `quote!` macro requires deep recursion.
+#![recursion_limit = "512"]
+
+#[macro_use]
+extern crate quote;
+#[macro_use]
+extern crate syn;
+
+extern crate proc_macro;
+extern crate proc_macro2;
+
+mod internals;
+
+use proc_macro::TokenStream;
+use syn::DeriveInput;
+
+#[macro_use]
+mod bound;
+#[macro_use]
+mod fragment;
+
+mod de;
+mod dummy;
+mod pretend;
+mod ser;
+mod try;
+
+#[proc_macro_derive(Serialize, attributes(serde))]
+pub fn derive_serialize(input: TokenStream) -> TokenStream {
+    let input = parse_macro_input!(input as DeriveInput);
+    ser::expand_derive_serialize(&input)
+        .unwrap_or_else(to_compile_errors)
+        .into()
+}
+
+#[proc_macro_derive(Deserialize, attributes(serde))]
+pub fn derive_deserialize(input: TokenStream) -> TokenStream {
+    let input = parse_macro_input!(input as DeriveInput);
+    de::expand_derive_deserialize(&input)
+        .unwrap_or_else(to_compile_errors)
+        .into()
+}
+
+fn to_compile_errors(errors: Vec<syn::Error>) -> proc_macro2::TokenStream {
+    let compile_errors = errors.iter().map(syn::Error::to_compile_error);
+    quote!(#(#compile_errors)*)
+}

serde_derive/src/pretend.rs

@@ -0,0 +1,140 @@
+use proc_macro2::{Span, TokenStream};
+use syn::Ident;
+
+use internals::ast::{Container, Data, Field, Style};
+
+// Suppress dead_code warnings that would otherwise appear when using a remote
+// derive. Other than this pretend code, a struct annotated with remote derive
+// never has its fields referenced and an enum annotated with remote derive
+// never has its variants constructed.
+//
+//     warning: field is never used: `i`
+//      --> src/main.rs:4:20
+//       |
+//     4 | struct StructDef { i: i32 }
+//       |                    ^^^^^^
+//
+//     warning: variant is never constructed: `V`
+//      --> src/main.rs:8:16
+//       |
+//     8 | enum EnumDef { V }
+//       |                ^
+//
+pub fn pretend_used(cont: &Container) -> TokenStream {
+    let pretend_fields = pretend_fields_used(cont);
+    let pretend_variants = pretend_variants_used(cont);
+
+    quote! {
+        #pretend_fields
+        #pretend_variants
+    }
+}
+
+// For structs with named fields, expands to:
+//
+//     match None::<T> {
+//         Some(T { a: ref __v0, b: ref __v1 }) => {}
+//         _ => {}
+//     }
+//
+// For enums, expands to the following but only including struct variants:
+//
+//     match None::<T> {
+//         Some(T::A { a: ref __v0 }) => {}
+//         Some(T::B { b: ref __v0 }) => {}
+//         _ => {}
+//     }
+//
+// The `ref` is important in case the user has written a Drop impl on their
+// type. Rust does not allow destructuring a struct or enum that has a Drop
+// impl.
+fn pretend_fields_used(cont: &Container) -> TokenStream {
+    let type_ident = &cont.ident;
+    let (_, ty_generics, _) = cont.generics.split_for_impl();
+
+    let patterns = match cont.data {
+        Data::Enum(ref variants) => variants
+            .iter()
+            .filter_map(|variant| match variant.style {
+                Style::Struct => {
+                    let variant_ident = &variant.ident;
+                    let pat = struct_pattern(&variant.fields);
+                    Some(quote!(#type_ident::#variant_ident #pat))
+                }
+                _ => None,
+            })
+            .collect::<Vec<_>>(),
+        Data::Struct(Style::Struct, ref fields) => {
+            let pat = struct_pattern(fields);
+            vec![quote!(#type_ident #pat)]
+        }
+        Data::Struct(_, _) => {
+            return quote!();
+        }
+    };
+
+    quote! {
+        match _serde::export::None::<#type_ident #ty_generics> {
+            #(
+                _serde::export::Some(#patterns) => {}
+            )*
+            _ => {}
+        }
+    }
+}
+
+// Expands to one of these per enum variant:
+//
+//     match None {
+//         Some((__v0, __v1,)) => {
+//             let _ = E::V { a: __v0, b: __v1 };
+//         }
+//         _ => {}
+//     }
+//
+fn pretend_variants_used(cont: &Container) -> TokenStream {
+    let variants = match cont.data {
+        Data::Enum(ref variants) => variants,
+        Data::Struct(_, _) => {
+            return quote!();
+        }
+    };
+
+    let type_ident = &cont.ident;
+    let (_, ty_generics, _) = cont.generics.split_for_impl();
+    let turbofish = ty_generics.as_turbofish();
+
+    let cases = variants.iter().map(|variant| {
+        let variant_ident = &variant.ident;
+        let placeholders = &(0..variant.fields.len())
+            .map(|i| Ident::new(&format!("__v{}", i), Span::call_site()))
+            .collect::<Vec<_>>();
+
+        let pat = match variant.style {
+            Style::Struct => {
+                let members = variant.fields.iter().map(|field| &field.member);
+                quote!({ #(#members: #placeholders),* })
+            }
+            Style::Tuple | Style::Newtype => quote!(( #(#placeholders),* )),
+            Style::Unit => quote!(),
+        };
+
+        quote! {
+            match _serde::export::None {
+                _serde::export::Some((#(#placeholders,)*)) => {
+                    let _ = #type_ident::#variant_ident #turbofish #pat;
+                }
+                _ => {}
+            }
+        }
+    });
+
+    quote!(#(#cases)*)
+}
+
+fn struct_pattern(fields: &[Field]) -> TokenStream {
+    let members = fields.iter().map(|field| &field.member);
+    let placeholders =
+        (0..fields.len()).map(|i| Ident::new(&format!("__v{}", i), Span::call_site()));
+    quote!({ #(#members: ref #placeholders),* })
+}

serde_derive/src/try.rs

@@ -0,0 +1,24 @@
+use proc_macro2::{Punct, Spacing, TokenStream};
+
+// None of our generated code requires the `From::from` error conversion
+// performed by the standard library's `try!` macro. With this simplified macro
+// we see a significant improvement in type checking and borrow checking time of
+// the generated code and a slight improvement in binary size.
+pub fn replacement() -> TokenStream {
+    // Cannot pass `$expr` to `quote!` prior to Rust 1.17.0 so interpolate it.
+    let dollar = Punct::new('$', Spacing::Alone);
+
+    quote! {
+        #[allow(unused_macros)]
+        macro_rules! try {
+            (#dollar __expr:expr) => {
+                match #dollar __expr {
+                    _serde::export::Ok(__val) => __val,
+                    _serde::export::Err(__err) => {
+                        return _serde::export::Err(__err);
+                    }
+                }
+            }
+        }
+    }
+}

serde_derive_internals/Cargo.toml

@@ -0,0 +1,23 @@
+[package]
+name = "serde_derive_internals"
+version = "0.24.1" # remember to update html_root_url
+authors = ["Erick Tryzelaar <erick.tryzelaar@gmail.com>", "David Tolnay <dtolnay@gmail.com>"]
+license = "MIT OR Apache-2.0"
+description = "AST representation used by Serde derive macros. Unstable."
+homepage = "https://serde.rs"
+repository = "https://github.com/serde-rs/serde"
+documentation = "https://docs.rs/serde_derive_internals"
+keywords = ["serde", "serialization"]
+include = ["Cargo.toml", "lib.rs", "src/**/*.rs", "LICENSE-APACHE", "LICENSE-MIT"]
+
+[lib]
+path = "lib.rs"
+
+[dependencies]
+proc-macro2 = "1.0"
+quote = "1.0"
+syn = { version = "1.0", default-features = false, features = ["derive", "parsing", "printing", "clone-impls"] }
+
+[badges]
+travis-ci = { repository = "serde-rs/serde" }
+appveyor = { repository = "serde-rs/serde" }

serde_derive_internals/LICENSE-APACHE

@@ -0,0 +1 @@
+../LICENSE-APACHE

serde_derive_internals/LICENSE-MIT

@@ -0,0 +1 @@
+../LICENSE-MIT

serde_derive_internals/lib.rs

@@ -0,0 +1,22 @@
+#![doc(html_root_url = "https://docs.rs/serde_derive_internals/0.24.1")]
+#![allow(unknown_lints, bare_trait_objects)]
+#![cfg_attr(feature = "cargo-clippy", allow(renamed_and_removed_lints))]
+#![cfg_attr(
+    feature = "cargo-clippy",
+    allow(
+        cognitive_complexity,
+        redundant_field_names,
+        trivially_copy_pass_by_ref
+    )
+)]
+
+#[macro_use]
+extern crate syn;
+
+extern crate proc_macro2;
+extern crate quote;
+
+#[path = "src/mod.rs"]
+mod internals;
+
+pub use internals::*;

serde_derive_internals/src

@@ -0,0 +1 @@
+../serde_derive/src/internals/

serde_macros/.gitignore

@@ -1,2 +0,0 @@
-/target
-/Cargo.lock

serde_macros/Cargo.toml

@@ -1,16 +0,0 @@
-[package]
-name = "serde_macros"
-version = "0.3.3"
-authors = ["Erick Tryzelaar <erick.tryzelaar@gmail.com>"]
-license = "MIT/Apache-2.0"
-description = "Macros to auto-generate implementations for the serde framework"
-repository = "https://github.com/erickt/rust-serde"
-
-[lib]
-name = "serde_macros"
-plugin = true
-
-[dependencies]
-aster = "*"
-quasi = "*"
-quasi_macros = "*"

serde_macros/src/de.rs

@@ -1,695 +0,0 @@
-use syntax::ast::{
-    Ident,
-    MetaItem,
-    Item,
-    Expr,
-    StructDef,
-    EnumDef,
-};
-use syntax::ast;
-use syntax::codemap::Span;
-use syntax::ext::base::ExtCtxt;
-use syntax::ext::build::AstBuilder;
-use syntax::ptr::P;
-
-use aster;
-
-use field;
-
-pub fn expand_derive_deserialize(
-    cx: &mut ExtCtxt,
-    span: Span,
-    _mitem: &MetaItem,
-    item: &Item,
-    push: &mut FnMut(P<ast::Item>)
-) {
-    let builder = aster::AstBuilder::new().span(span);
-
-    let generics = match item.node {
-        ast::ItemStruct(_, ref generics) => generics,
-        ast::ItemEnum(_, ref generics) => generics,
-        _ => cx.bug("expected ItemStruct or ItemEnum in #[derive(Deserialize)]")
-    };
-
-    let impl_generics = builder.from_generics(generics.clone())
-        .add_ty_param_bound(
-            builder.path().global().ids(&["serde", "de", "Deserialize"]).build()
-        )
-        .build();
-
-    let ty = builder.ty().path()
-        .segment(item.ident).with_generics(impl_generics.clone()).build()
-        .build();
-
-    let body = deserialize_body(
-        cx,
-        &builder,
-        item,
-        &impl_generics,
-        ty.clone(),
-    );
-
-    let where_clause = &impl_generics.where_clause;
-
-    let impl_item = quote_item!(cx,
-        #[automatically_derived]
-        impl $impl_generics ::serde::de::Deserialize for $ty $where_clause {
-            fn deserialize<__D>(deserializer: &mut __D) -> ::std::result::Result<$ty, __D::Error>
-                where __D: ::serde::de::Deserializer,
-            {
-                $body
-            }
-        }
-    ).unwrap();
-
-    push(impl_item)
-}
-
-fn deserialize_body(
-    cx: &ExtCtxt,
-    builder: &aster::AstBuilder,
-    item: &Item,
-    impl_generics: &ast::Generics,
-    ty: P<ast::Ty>,
-) -> P<ast::Expr> {
-    match item.node {
-        ast::ItemStruct(ref struct_def, _) => {
-            deserialize_item_struct(
-                cx,
-                builder,
-                item,
-                impl_generics,
-                ty,
-                struct_def,
-            )
-        }
-        ast::ItemEnum(ref enum_def, _) => {
-            deserialize_item_enum(
-                cx,
-                builder,
-                item.ident,
-                impl_generics,
-                ty,
-                enum_def,
-            )
-        }
-        _ => cx.bug("expected ItemStruct or ItemEnum in #[derive(Deserialize)]")
-    }
-}
-
-fn deserialize_item_struct(
-    cx: &ExtCtxt,
-    builder: &aster::AstBuilder,
-    item: &Item,
-    impl_generics: &ast::Generics,
-    ty: P<ast::Ty>,
-    struct_def: &ast::StructDef,
-) -> P<ast::Expr> {
-    let mut named_fields = vec![];
-    let mut unnamed_fields = 0;
-
-    for field in struct_def.fields.iter() {
-        match field.node.kind {
-            ast::NamedField(name, _) => { named_fields.push(name); }
-            ast::UnnamedField(_) => { unnamed_fields += 1; }
-        }
-    }
-
-    match (named_fields.is_empty(), unnamed_fields == 0) {
-        (true, true) => {
-            deserialize_unit_struct(
-                cx,
-                &builder,
-                item.ident,
-            )
-        }
-        (true, false) => {
-            deserialize_tuple_struct(
-                cx,
-                &builder,
-                item.ident,
-                impl_generics,
-                ty,
-                unnamed_fields,
-            )
-        }
-        (false, true) => {
-            deserialize_struct(
-                cx,
-                &builder,
-                item.ident,
-                impl_generics,
-                ty,
-                struct_def,
-            )
-        }
-        (false, false) => {
-            cx.bug("struct has named and unnamed fields")
-        }
-    }
-}
-
-
-// Build `__Visitor<A, B, ...>(PhantomData<A>, PhantomData<B>, ...)`
-fn deserialize_visitor(
-    builder: &aster::AstBuilder,
-    trait_generics: &ast::Generics,
-) -> (P<ast::Item>, P<ast::Ty>, P<ast::Expr>) {
-    if trait_generics.ty_params.is_empty() {
-        (
-            builder.item().tuple_struct("__Visitor").build(),
-            builder.ty().id("__Visitor"),
-            builder.expr().id("__Visitor"),
-        )
-    } else {
-        (
-            builder.item().tuple_struct("__Visitor")
-                .generics().with(trait_generics.clone()).build()
-                .with_tys(
-                    trait_generics.ty_params.iter().map(|ty_param| {
-                        builder.ty().phantom_data().id(ty_param.ident)
-                    })
-                )
-                .build(),
-            builder.ty().path()
-                .segment("__Visitor").with_generics(trait_generics.clone()).build()
-                .build(),
-            builder.expr().call().id("__Visitor")
-                .with_args(
-                    trait_generics.ty_params.iter().map(|_| {
-                        builder.expr().phantom_data()
-                    })
-                )
-                .build(),
-        )
-    }
-}
-
-fn deserialize_unit_struct(
-    cx: &ExtCtxt,
-    builder: &aster::AstBuilder,
-    type_ident: Ident,
-) -> P<ast::Expr> {
-    let type_name = builder.expr().str(type_ident);
-
-    quote_expr!(cx, {
-        struct __Visitor;
-
-        impl ::serde::de::Visitor for __Visitor {
-            type Value = $type_ident;
-
-            #[inline]
-            fn visit_unit<E>(&mut self) -> ::std::result::Result<$type_ident, E>
-                where E: ::serde::de::Error,
-            {
-                Ok($type_ident)
-            }
-
-            #[inline]
-            fn visit_seq<V>(&mut self, mut visitor: V) -> ::std::result::Result<$type_ident, V::Error>
-                where V: ::serde::de::SeqVisitor,
-            {
-                try!(visitor.end());
-                self.visit_unit()
-            }
-        }
-
-        deserializer.visit_named_unit($type_name, __Visitor)
-    })
-}
-
-fn deserialize_tuple_struct(
-    cx: &ExtCtxt,
-    builder: &aster::AstBuilder,
-    type_ident: Ident,
-    impl_generics: &ast::Generics,
-    ty: P<ast::Ty>,
-    fields: usize,
-) -> P<ast::Expr> {
-    let where_clause = &impl_generics.where_clause;
-
-    let (visitor_item, visitor_ty, visitor_expr) = deserialize_visitor(
-        builder,
-        impl_generics,
-    );
-
-    let visit_seq_expr = deserialize_seq(
-        cx,
-        builder,
-        builder.path().id(type_ident).build(),
-        fields,
-    );
-
-    let type_name = builder.expr().str(type_ident);
-
-    quote_expr!(cx, {
-        $visitor_item
-
-        impl $impl_generics ::serde::de::Visitor for $visitor_ty $where_clause {
-            type Value = $ty;
-
-            fn visit_seq<__V>(&mut self, mut visitor: __V) -> ::std::result::Result<$ty, __V::Error>
-                where __V: ::serde::de::SeqVisitor,
-            {
-                $visit_seq_expr
-            }
-        }
-
-        deserializer.visit_named_seq($type_name, $visitor_expr)
-    })
-}
-
-fn deserialize_seq(
-    cx: &ExtCtxt,
-    builder: &aster::AstBuilder,
-    struct_path: ast::Path,
-    fields: usize,
-) -> P<ast::Expr> {
-    let let_values: Vec<P<ast::Stmt>> = (0 .. fields)
-        .map(|i| {
-            let name = builder.id(format!("__field{}", i));
-            quote_stmt!(cx,
-                let $name = match try!(visitor.visit()) {
-                    Some(value) => value,
-                    None => {
-                        return Err(::serde::de::Error::end_of_stream_error());
-                    }
-                };
-            ).unwrap()
-        })
-        .collect();
-
-    let result = builder.expr().call()
-        .build_path(struct_path)
-        .with_args((0 .. fields).map(|i| builder.expr().id(format!("__field{}", i))))
-        .build();
-
-    quote_expr!(cx, {
-        $let_values
-
-        try!(visitor.end());
-
-        Ok($result)
-    })
-}
-
-fn deserialize_struct(
-    cx: &ExtCtxt,
-    builder: &aster::AstBuilder,
-    type_ident: Ident,
-    impl_generics: &ast::Generics,
-    ty: P<ast::Ty>,
-    struct_def: &StructDef,
-) -> P<ast::Expr> {
-    let where_clause = &impl_generics.where_clause;
-
-    let (visitor_item, visitor_ty, visitor_expr) = deserialize_visitor(
-        builder,
-        impl_generics,
-    );
-
-    let (field_visitor, visit_map_expr) = deserialize_struct_visitor(
-        cx,
-        builder,
-        struct_def,
-        builder.path().id(type_ident).build(),
-    );
-
-    let type_name = builder.expr().str(type_ident);
-
-    quote_expr!(cx, {
-        $field_visitor
-
-        $visitor_item
-
-        impl $impl_generics ::serde::de::Visitor for $visitor_ty $where_clause {
-            type Value = $ty;
-
-            #[inline]
-            fn visit_map<__V>(&mut self, mut visitor: __V) -> ::std::result::Result<$ty, __V::Error>
-                where __V: ::serde::de::MapVisitor,
-            {
-                $visit_map_expr
-            }
-        }
-
-        deserializer.visit_named_map($type_name, $visitor_expr)
-    })
-}
-
-fn deserialize_item_enum(
-    cx: &ExtCtxt,
-    builder: &aster::AstBuilder,
-    type_ident: Ident,
-    impl_generics: &ast::Generics,
-    ty: P<ast::Ty>,
-    enum_def: &EnumDef,
-) -> P<ast::Expr> {
-    let where_clause = &impl_generics.where_clause;
-
-    let type_name = builder.expr().str(type_ident);
-
-    let variant_visitor = deserialize_field_visitor(
-        cx,
-        builder,
-        enum_def.variants.iter()
-            .map(|variant| builder.expr().str(variant.node.name))
-            .collect()
-    );
-
-    // Match arms to extract a variant from a string
-    let variant_arms: Vec<_> = enum_def.variants.iter()
-        .enumerate()
-        .map(|(i, variant)| {
-            let variant_name = builder.pat().enum_()
-                .id("__Field").id(format!("__field{}", i)).build()
-                .build();
-
-            let expr = deserialize_variant(
-                cx,
-                builder,
-                type_ident,
-                impl_generics,
-                ty.clone(),
-                variant,
-            );
-
-            quote_arm!(cx, $variant_name => { $expr })
-        })
-        .collect();
-
-    let (visitor_item, visitor_ty, visitor_expr) = deserialize_visitor(
-        builder,
-        impl_generics,
-    );
-
-    quote_expr!(cx, {
-        $variant_visitor
-
-        $visitor_item
-
-        impl $impl_generics ::serde::de::EnumVisitor for $visitor_ty $where_clause {
-            type Value = $ty;
-
-            fn visit<__V>(&mut self, mut visitor: __V) -> ::std::result::Result<$ty, __V::Error>
-                where __V: ::serde::de::VariantVisitor,
-            {
-                match try!(visitor.visit_variant()) {
-                    $variant_arms
-                }
-            }
-        }
-
-        deserializer.visit_enum($type_name, $visitor_expr)
-    })
-}
-
-fn deserialize_variant(
-    cx: &ExtCtxt,
-    builder: &aster::AstBuilder,
-    type_ident: Ident,
-    generics: &ast::Generics,
-    ty: P<ast::Ty>,
-    variant: &ast::Variant,
-) -> P<ast::Expr> {
-    let variant_ident = variant.node.name;
-
-    match variant.node.kind {
-        ast::TupleVariantKind(ref args) if args.is_empty() => {
-            quote_expr!(cx, {
-                try!(visitor.visit_unit());
-                Ok($type_ident::$variant_ident)
-            })
-        }
-        ast::TupleVariantKind(ref args) => {
-            deserialize_tuple_variant(
-                cx,
-                builder,
-                type_ident,
-                variant_ident,
-                generics,
-                ty,
-                args.len(),
-            )
-        }
-        ast::StructVariantKind(ref struct_def) => {
-            deserialize_struct_variant(
-                cx,
-                builder,
-                type_ident,
-                variant_ident,
-                generics,
-                ty,
-                struct_def,
-            )
-        }
-    }
-}
-
-fn deserialize_tuple_variant(
-    cx: &ExtCtxt,
-    builder: &aster::AstBuilder,
-    type_ident: ast::Ident,
-    variant_ident: ast::Ident,
-    generics: &ast::Generics,
-    ty: P<ast::Ty>,
-    fields: usize,
-) -> P<ast::Expr> {
-    let where_clause = &generics.where_clause;
-
-    let (visitor_item, visitor_ty, visitor_expr) = deserialize_visitor(
-        builder,
-        generics,
-    );
-
-    let visit_seq_expr = deserialize_seq(
-        cx,
-        builder,
-        builder.path().id(type_ident).id(variant_ident).build(),
-        fields,
-    );
-
-    quote_expr!(cx, {
-        $visitor_item
-
-        impl $generics ::serde::de::Visitor for $visitor_ty $where_clause {
-            type Value = $ty;
-
-            fn visit_seq<__V>(&mut self, mut visitor: __V) -> ::std::result::Result<$ty, __V::Error>
-                where __V: ::serde::de::SeqVisitor,
-            {
-                $visit_seq_expr
-            }
-        }
-
-        visitor.visit_seq($visitor_expr)
-    })
-}
-
-fn deserialize_struct_variant(
-    cx: &ExtCtxt,
-    builder: &aster::AstBuilder,
-    type_ident: ast::Ident,
-    variant_ident: ast::Ident,
-    generics: &ast::Generics,
-    ty: P<ast::Ty>,
-    struct_def: &ast::StructDef,
-) -> P<ast::Expr> {
-    let where_clause = &generics.where_clause;
-
-    let (field_visitor, field_expr) = deserialize_struct_visitor(
-        cx,
-        builder,
-        struct_def,
-        builder.path().id(type_ident).id(variant_ident).build(),
-    );
-
-    let (visitor_item, visitor_ty, visitor_expr) = deserialize_visitor(
-        builder,
-        generics,
-    );
-
-    quote_expr!(cx, {
-        $field_visitor
-
-        $visitor_item
-
-        impl $generics ::serde::de::Visitor for $visitor_ty $where_clause {
-            type Value = $ty;
-
-            fn visit_map<__V>(&mut self, mut visitor: __V) -> ::std::result::Result<$ty, __V::Error>
-                where __V: ::serde::de::MapVisitor,
-            {
-                $field_expr
-            }
-        }
-
-        visitor.visit_map($visitor_expr)
-    })
-}
-
-fn deserialize_field_visitor(
-    cx: &ExtCtxt,
-    builder: &aster::AstBuilder,
-    field_exprs: Vec<P<ast::Expr>>,
-) -> Vec<P<ast::Item>> {
-    // Create the field names for the fields.
-    let field_idents: Vec<ast::Ident> = (0 .. field_exprs.len())
-        .map(|i| builder.id(format!("__field{}", i)))
-        .collect();
-
-    let field_enum = builder.item()
-        .attr().allow(&["non_camel_case_types"])
-        .enum_("__Field")
-        .with_variants(
-            field_idents.iter().map(|field_ident| {
-                builder.variant(field_ident).tuple().build()
-            })
-        )
-        .build();
-
-    // Match arms to extract a field from a string
-    let field_arms: Vec<_> = field_idents.iter()
-        .zip(field_exprs.into_iter())
-        .map(|(field_ident, field_expr)| {
-            quote_arm!(cx, $field_expr => { Ok(__Field::$field_ident) })
-        })
-        .collect();
-
-    vec![
-        field_enum,
-
-        quote_item!(cx,
-            impl ::serde::de::Deserialize for __Field {
-                #[inline]
-                fn deserialize<D>(deserializer: &mut D) -> ::std::result::Result<__Field, D::Error>
-                    where D: ::serde::de::Deserializer,
-                {
-                    struct __FieldVisitor;
-
-                    impl ::serde::de::Visitor for __FieldVisitor {
-                        type Value = __Field;
-
-                        fn visit_str<E>(&mut self, value: &str) -> ::std::result::Result<__Field, E>
-                            where E: ::serde::de::Error,
-                        {
-                            match value {
-                                $field_arms
-                                _ => Err(::serde::de::Error::unknown_field_error(value)),
-                            }
-                        }
-                    }
-
-                    deserializer.visit(__FieldVisitor)
-                }
-            }
-        ).unwrap(),
-    ]
-}
-
-fn deserialize_struct_visitor(
-    cx: &ExtCtxt,
-    builder: &aster::AstBuilder,
-    struct_def: &ast::StructDef,
-    struct_path: ast::Path,
-) -> (Vec<P<ast::Item>>, P<ast::Expr>) {
-    let field_visitor = deserialize_field_visitor(
-        cx,
-        builder,
-        field::struct_field_strs(cx, builder, struct_def, field::Direction::Deserialize),
-    );
-
-    let visit_map_expr = deserialize_map(
-        cx,
-        builder,
-        struct_path,
-        struct_def,
-    );
-
-    (field_visitor, visit_map_expr)
-}
-
-fn deserialize_map(
-    cx: &ExtCtxt,
-    builder: &aster::AstBuilder,
-    struct_path: ast::Path,
-    struct_def: &StructDef,
-) -> P<ast::Expr> {
-    // Create the field names for the fields.
-    let field_names: Vec<ast::Ident> = (0 .. struct_def.fields.len())
-        .map(|i| builder.id(format!("__field{}", i)))
-        .collect();
-
-    // Declare each field.
-    let let_values: Vec<P<ast::Stmt>> = field_names.iter()
-        .map(|field_name| quote_stmt!(cx, let mut $field_name = None;).unwrap())
-        .collect();
-
-    // Match arms to extract a value for a field.
-    let value_arms: Vec<ast::Arm> = field_names.iter()
-        .map(|field_name| {
-            quote_arm!(cx,
-                __Field::$field_name => {
-                    $field_name = Some(try!(visitor.visit_value()));
-                }
-            )
-        })
-        .collect();
-
-    let extract_values: Vec<P<ast::Stmt>> = field_names.iter()
-        .zip(struct_def.fields.iter())
-        .map(|(field_name, field)| {
-            let rename = field::field_rename(field, &field::Direction::Deserialize);
-            let name_str = match (rename, field.node.kind) {
-                (Some(rename), _) => builder.expr().build_lit(P(rename.clone())),
-                (None, ast::NamedField(name, _)) => builder.expr().str(name),
-                (None, ast::UnnamedField(_)) => panic!("struct contains unnamed fields"),
-            };
-
-            let missing_expr = if field::default_value(field) {
-                quote_expr!(cx, ::std::default::Default::default())
-            } else {
-                quote_expr!(cx, try!(visitor.missing_field($name_str)))
-            };
-
-            quote_stmt!(cx,
-                let $field_name = match $field_name {
-                    Some($field_name) => $field_name,
-                    None => $missing_expr,
-                };
-            ).unwrap()
-        })
-        .collect();
-
-    let result = builder.expr().struct_path(struct_path)
-        .with_id_exprs(
-            struct_def.fields.iter()
-                .zip(field_names.iter())
-                .map(|(field, field_name)| {
-                    (
-                        match field.node.kind {
-                            ast::NamedField(name, _) => name.clone(),
-                            ast::UnnamedField(_) => panic!("struct contains unnamed fields"),
-                        },
-                        builder.expr().id(field_name),
-                    )
-                })
-        )
-        .build();
-
-    quote_expr!(cx, {
-        $let_values
-
-        while let Some(key) = try!(visitor.visit_key()) {
-            match key {
-                $value_arms
-            }
-        }
-
-        $extract_values
-
-        try!(visitor.end());
-
-        Ok($result)
-    })
-}

serde_macros/src/field.rs

@@ -1,96 +0,0 @@
-use syntax::ast;
-use syntax::attr;
-use syntax::ext::base::ExtCtxt;
-use syntax::ptr::P;
-
-use aster;
-
-pub enum Direction {
-    Serialize,
-    Deserialize,
-}
-
-pub fn field_rename<'a>(
-    field: &'a ast::StructField,
-    direction: &Direction,
-) -> Option<&'a ast::Lit> {
-    let dir_attr = match *direction {
-        Direction::Serialize => "rename_serialize",
-        Direction::Deserialize => "rename_deserialize",
-    };
-    field.node.attrs.iter()
-        .find(|sa| {
-            if let ast::MetaList(ref n, _) = sa.node.value.node {
-                n == &"serde"
-            } else {
-                false
-            }
-        })
-        .and_then(|sa| {
-            if let ast::MetaList(_, ref vals) = sa.node.value.node {
-                attr::mark_used(&sa);
-                vals.iter().fold(None, |v, mi| {
-                    if let ast::MetaNameValue(ref n, ref lit) = mi.node {
-                        if n == &"rename" || n == &dir_attr {
-                            Some(lit)
-                        } else {
-                            v
-                        }
-                    } else {
-                        v
-                    }
-                })
-            } else {
-                None
-            }
-        })
-}
-
-pub fn struct_field_strs(
-    cx: &ExtCtxt,
-    builder: &aster::AstBuilder,
-    struct_def: &ast::StructDef,
-    direction: Direction,
-) -> Vec<P<ast::Expr>> {
-    struct_def.fields.iter()
-        .map(|field| {
-            match field_rename(field, &direction) {
-                Some(rename) => builder.expr().build_lit(P(rename.clone())),
-                None => {
-                    match field.node.kind {
-                        ast::NamedField(name, _) => {
-                            builder.expr().str(name)
-                        }
-                        ast::UnnamedField(_) => {
-                            cx.bug("struct has named and unnamed fields")
-                        }
-                    }
-                }
-            }
-        })
-        .collect()
-}
-
-pub fn default_value(field: &ast::StructField) -> bool {
-    field.node.attrs.iter()
-        .any(|sa| {
-             if let ast::MetaItem_::MetaList(ref n, ref vals) = sa.node.value.node {
-                 if n == &"serde" {
-                     attr::mark_used(&sa);
-                     vals.iter()
-                         .map(|mi|
-                              if let ast::MetaItem_::MetaWord(ref n) = mi.node {
-                                  n == &"default"
-                              } else {
-                                  false
-                              })
-                         .any(|x| x)
-                 } else {
-                     false
-                 }
-             }
-             else {
-                 false
-             }
-        })
-}

serde_macros/src/lib.rs

@@ -1,27 +0,0 @@
-#![feature(custom_derive, plugin, plugin_registrar, rustc_private, unboxed_closures)]
-#![plugin(quasi_macros)]
-
-extern crate aster;
-extern crate quasi;
-extern crate rustc;
-extern crate syntax;
-
-use syntax::ext::base::Decorator;
-use syntax::parse::token;
-use rustc::plugin::Registry;
-
-mod ser;
-mod de;
-mod field;
-
-#[plugin_registrar]
-#[doc(hidden)]
-pub fn plugin_registrar(reg: &mut Registry) {
-    reg.register_syntax_extension(
-        token::intern("derive_Serialize"),
-        Decorator(Box::new(ser::expand_derive_serialize)));
-
-    reg.register_syntax_extension(
-        token::intern("derive_Deserialize"),
-        Decorator(Box::new(de::expand_derive_deserialize)));
-}

serde_macros/src/ser.rs

@@ -1,585 +0,0 @@
-use syntax::ast::{
-    Ident,
-    MetaItem,
-    Item,
-    Expr,
-    StructDef,
-};
-use syntax::ast;
-use syntax::codemap::Span;
-use syntax::ext::base::ExtCtxt;
-use syntax::ext::build::AstBuilder;
-use syntax::ptr::P;
-
-use aster;
-
-use field::{Direction, struct_field_strs};
-
-pub fn expand_derive_serialize(
-    cx: &mut ExtCtxt,
-    span: Span,
-    _mitem: &MetaItem,
-    item: &Item,
-    push: &mut FnMut(P<ast::Item>)
-) {
-    let builder = aster::AstBuilder::new().span(span);
-
-    let generics = match item.node {
-        ast::ItemStruct(_, ref generics) => generics,
-        ast::ItemEnum(_, ref generics) => generics,
-        _ => cx.bug("expected ItemStruct or ItemEnum in #[derive(Serialize)]")
-    };
-
-    let impl_generics = builder.from_generics(generics.clone())
-        .add_ty_param_bound(
-            builder.path().global().ids(&["serde", "ser", "Serialize"]).build()
-        )
-        .build();
-
-    let ty = builder.ty().path()
-        .segment(item.ident).with_generics(impl_generics.clone()).build()
-        .build();
-
-    let body = serialize_body(
-        cx,
-        &builder,
-        item,
-        &impl_generics,
-        ty.clone(),
-    );
-
-    let where_clause = &impl_generics.where_clause;
-
-    let impl_item = quote_item!(cx,
-        #[automatically_derived]
-        impl $impl_generics ::serde::ser::Serialize for $ty $where_clause {
-            fn serialize<__S>(&self, serializer: &mut __S) -> ::std::result::Result<(), __S::Error>
-                where __S: ::serde::ser::Serializer,
-            {
-                $body
-            }
-        }
-    ).unwrap();
-
-    push(impl_item)
-}
-
-fn serialize_body(
-    cx: &ExtCtxt,
-    builder: &aster::AstBuilder,
-    item: &Item,
-    impl_generics: &ast::Generics,
-    ty: P<ast::Ty>,
-) -> P<ast::Expr> {
-    match item.node {
-        ast::ItemStruct(ref struct_def, _) => {
-            serialize_item_struct(
-                cx,
-                builder,
-                item,
-                impl_generics,
-                ty,
-                struct_def,
-            )
-        }
-        ast::ItemEnum(ref enum_def, _) => {
-            serialize_item_enum(
-                cx,
-                builder,
-                item.ident,
-                impl_generics,
-                enum_def,
-            )
-        }
-        _ => cx.bug("expected ItemStruct or ItemEnum in #[derive(Serialize)]")
-    }
-}
-
-fn serialize_item_struct(
-    cx: &ExtCtxt,
-    builder: &aster::AstBuilder,
-    item: &Item,
-    impl_generics: &ast::Generics,
-    ty: P<ast::Ty>,
-    struct_def: &ast::StructDef,
-) -> P<ast::Expr> {
-    let mut named_fields = vec![];
-    let mut unnamed_fields = 0;
-
-    for field in struct_def.fields.iter() {
-        match field.node.kind {
-            ast::NamedField(name, _) => { named_fields.push(name); }
-            ast::UnnamedField(_) => { unnamed_fields += 1; }
-        }
-    }
-
-    match (named_fields.is_empty(), unnamed_fields == 0) {
-        (true, true) => {
-            serialize_unit_struct(
-                cx,
-                &builder,
-                item.ident,
-            )
-        }
-        (true, false) => {
-            serialize_tuple_struct(
-                cx,
-                &builder,
-                item.ident,
-                impl_generics,
-                ty,
-                unnamed_fields,
-            )
-        }
-        (false, true) => {
-            serialize_struct(
-                cx,
-                &builder,
-                item.ident,
-                impl_generics,
-                ty,
-                struct_def,
-                named_fields,
-            )
-        }
-        (false, false) => {
-            cx.bug("struct has named and unnamed fields")
-        }
-    }
-}
-
-fn serialize_unit_struct(
-    cx: &ExtCtxt,
-    builder: &aster::AstBuilder,
-    type_ident: Ident
-) -> P<ast::Expr> {
-    let type_name = builder.expr().str(type_ident);
-
-    quote_expr!(cx, serializer.visit_named_unit($type_name))
-}
-
-fn serialize_tuple_struct(
-    cx: &ExtCtxt,
-    builder: &aster::AstBuilder,
-    type_ident: Ident,
-    impl_generics: &ast::Generics,
-    ty: P<ast::Ty>,
-    fields: usize,
-) -> P<ast::Expr> {
-    let value_ty = builder.ty()
-        .ref_()
-            .lifetime("'__a")
-            .build_ty(ty);
-
-    let (visitor_struct, visitor_impl) = serialize_tuple_struct_visitor(
-        cx,
-        builder,
-        value_ty,
-        fields,
-        impl_generics,
-    );
-
-    let type_name = builder.expr().str(type_ident);
-
-    quote_expr!(cx, {
-        $visitor_struct
-        $visitor_impl
-        serializer.visit_named_seq($type_name, Visitor {
-            value: self,
-            state: 0,
-        })
-    })
-}
-
-fn serialize_struct(
-    cx: &ExtCtxt,
-    builder: &aster::AstBuilder,
-    type_ident: Ident,
-    impl_generics: &ast::Generics,
-    ty: P<ast::Ty>,
-    struct_def: &StructDef,
-    fields: Vec<Ident>,
-) -> P<ast::Expr> {
-    let value_ty = builder.ty()
-        .ref_()
-            .lifetime("'__a")
-            .build_ty(ty.clone());
-
-    let (visitor_struct, visitor_impl) = serialize_struct_visitor(
-        cx,
-        builder,
-        value_ty,
-        struct_def,
-        impl_generics,
-        fields.iter().map(|field| quote_expr!(cx, &self.value.$field)),
-    );
-
-    let type_name = builder.expr().str(type_ident);
-
-    quote_expr!(cx, {
-        $visitor_struct
-        $visitor_impl
-        serializer.visit_named_map($type_name, Visitor {
-            value: self,
-            state: 0,
-        })
-    })
-}
-
-fn serialize_item_enum(
-    cx: &ExtCtxt,
-    builder: &aster::AstBuilder,
-    type_ident: Ident,
-    impl_generics: &ast::Generics,
-    enum_def: &ast::EnumDef,
-) -> P<ast::Expr> {
-    let arms: Vec<ast::Arm> = enum_def.variants.iter()
-        .map(|variant| {
-            serialize_variant(
-                cx,
-                builder,
-                type_ident,
-                impl_generics,
-                variant,
-            )
-        })
-        .collect();
-
-    quote_expr!(cx,
-        match *self {
-            $arms
-        }
-    )
-}
-
-fn serialize_variant(
-    cx: &ExtCtxt,
-    builder: &aster::AstBuilder,
-    type_ident: Ident,
-    generics: &ast::Generics,
-    variant: &ast::Variant,
-) -> ast::Arm {
-    let type_name = builder.expr().str(type_ident);
-    let variant_ident = variant.node.name;
-    let variant_name = builder.expr().str(variant_ident);
-
-    match variant.node.kind {
-        ast::TupleVariantKind(ref args) if args.is_empty() => {
-            let pat = builder.pat().enum_()
-                .id(type_ident).id(variant_ident).build()
-                .build();
-
-            quote_arm!(cx,
-                $pat => {
-                    ::serde::ser::Serializer::visit_enum_unit(
-                        serializer,
-                        $type_name,
-                        $variant_name,
-                    )
-                },
-            )
-        }
-        ast::TupleVariantKind(ref args) => {
-            let fields: Vec<ast::Ident> = (0 .. args.len())
-                .map(|i| builder.id(format!("__field{}", i)))
-                .collect();
-
-            let pat = builder.pat().enum_()
-                .id(type_ident).id(variant_ident).build()
-                .with_pats(fields.iter().map(|field| builder.pat().ref_id(field)))
-                .build();
-
-            let expr = serialize_tuple_variant(
-                cx,
-                builder,
-                type_name,
-                variant_name,
-                generics,
-                args,
-                fields,
-            );
-
-            quote_arm!(cx, $pat => { $expr })
-        }
-        ast::StructVariantKind(ref struct_def) => {
-            let fields: Vec<_> = (0 .. struct_def.fields.len())
-                .map(|i| builder.id(format!("__field{}", i)))
-                .collect();
-
-            let pat = builder.pat().struct_()
-                .id(type_ident).id(variant_ident).build()
-                .with_pats(
-                    fields.iter()
-                        .zip(struct_def.fields.iter())
-                        .map(|(id, field)| {
-                            let name = match field.node.kind {
-                                ast::NamedField(name, _) => name,
-                                ast::UnnamedField(_) => {
-                                    cx.bug("struct variant has unnamed fields")
-                                }
-                            };
-
-                            (name, builder.pat().ref_id(id))
-                        })
-                )
-                .build();
-
-            let expr = serialize_struct_variant(
-                cx,
-                builder,
-                type_name,
-                variant_name,
-                generics,
-                struct_def,
-                fields,
-            );
-
-            quote_arm!(cx, $pat => { $expr })
-        }
-    }
-}
-
-fn serialize_tuple_variant(
-    cx: &ExtCtxt,
-    builder: &aster::AstBuilder,
-    type_name: P<ast::Expr>,
-    variant_name: P<ast::Expr>,
-    generics: &ast::Generics,
-    args: &[ast::VariantArg],
-    fields: Vec<Ident>,
-) -> P<ast::Expr> {
-    let value_ty = builder.ty().tuple()
-        .with_tys(
-            args.iter().map(|arg| {
-                builder.ty()
-                    .ref_()
-                    .lifetime("'__a")
-                    .build_ty(arg.ty.clone())
-            })
-        )
-        .build();
-
-    let value_expr = builder.expr().tuple()
-        .with_exprs(
-            fields.iter().map(|field| {
-                builder.expr()
-                    .addr_of()
-                    .id(field)
-            })
-        )
-        .build();
-
-    let (visitor_struct, visitor_impl) = serialize_tuple_struct_visitor(
-        cx,
-        builder,
-        value_ty,
-        args.len(),
-        generics,
-    );
-
-    quote_expr!(cx, {
-        $visitor_struct
-        $visitor_impl
-        serializer.visit_enum_seq($type_name, $variant_name, Visitor {
-            value: $value_expr,
-            state: 0,
-        })
-    })
-}
-
-fn serialize_struct_variant(
-    cx: &ExtCtxt,
-    builder: &aster::AstBuilder,
-    type_name: P<ast::Expr>,
-    variant_name: P<ast::Expr>,
-    generics: &ast::Generics,
-    struct_def: &ast::StructDef,
-    fields: Vec<Ident>,
-) -> P<ast::Expr> {
-    let value_ty = builder.ty().tuple()
-        .with_tys(
-            struct_def.fields.iter().map(|field| {
-                builder.ty()
-                    .ref_()
-                    .lifetime("'__a")
-                    .build_ty(field.node.ty.clone())
-            })
-        )
-        .build();
-
-    let value_expr = builder.expr().tuple()
-        .with_exprs(
-            fields.iter().map(|field| {
-                builder.expr()
-                    .addr_of()
-                    .id(field)
-            })
-        )
-        .build();
-
-    let (visitor_struct, visitor_impl) = serialize_struct_visitor(
-        cx,
-        builder,
-        value_ty,
-        struct_def,
-        generics,
-        (0 .. fields.len()).map(|i| {
-            builder.expr()
-                .tup_field(i)
-                .field("value").self_()
-        })
-    );
-
-    quote_expr!(cx, {
-        $visitor_struct
-        $visitor_impl
-        serializer.visit_enum_map($type_name, $variant_name, Visitor {
-            value: $value_expr,
-            state: 0,
-        })
-    })
-}
-
-fn serialize_tuple_struct_visitor(
-    cx: &ExtCtxt,
-    builder: &aster::AstBuilder,
-    value_ty: P<ast::Ty>,
-    fields: usize,
-    generics: &ast::Generics
-) -> (P<ast::Item>, P<ast::Item>) {
-    let arms: Vec<ast::Arm> = (0 .. fields)
-        .map(|i| {
-            let expr = builder.expr()
-                .tup_field(i)
-                .field("value").self_();
-
-            quote_arm!(cx,
-                $i => {
-                    self.state += 1;
-                    let v = try!(serializer.visit_seq_elt(&$expr));
-                    Ok(Some(v))
-                }
-            )
-        })
-        .collect();
-
-    let visitor_impl_generics = builder.from_generics(generics.clone())
-        .add_lifetime_bound("'__a")
-        .lifetime_name("'__a")
-        .build();
-
-    let where_clause = &visitor_impl_generics.where_clause;
-
-    let visitor_generics = builder.from_generics(visitor_impl_generics.clone())
-        .strip_bounds()
-        .build();
-
-    (
-        quote_item!(cx,
-            struct Visitor $visitor_impl_generics $where_clause {
-                state: usize,
-                value: $value_ty,
-            }
-        ).unwrap(),
-
-        quote_item!(cx,
-            impl $visitor_impl_generics ::serde::ser::SeqVisitor
-            for Visitor $visitor_generics
-            $where_clause {
-                #[inline]
-                fn visit<S>(&mut self, serializer: &mut S) -> ::std::result::Result<Option<()>, S::Error>
-                    where S: ::serde::ser::Serializer,
-                {
-                    match self.state {
-                        $arms
-                        _ => Ok(None),
-                    }
-                }
-
-                #[inline]
-                fn len(&self) -> Option<usize> {
-                    Some($fields)
-                }
-            }
-        ).unwrap(),
-    )
-}
-
-fn serialize_struct_visitor<I>(
-    cx: &ExtCtxt,
-    builder: &aster::AstBuilder,
-    value_ty: P<ast::Ty>,
-    struct_def: &StructDef,
-    generics: &ast::Generics,
-    value_exprs: I,
-) -> (P<ast::Item>, P<ast::Item>)
-    where I: Iterator<Item=P<ast::Expr>>,
-{
-    let len = struct_def.fields.len();
-
-    let key_exprs = struct_field_strs(cx, builder, struct_def, Direction::Serialize);
-
-    let arms: Vec<ast::Arm> = key_exprs.iter()
-        .zip(value_exprs)
-        .enumerate()
-        .map(|(i, (key_expr, value_expr))| {
-            quote_arm!(cx,
-                $i => {
-                    self.state += 1;
-                    Ok(
-                        Some(
-                            try!(
-                                serializer.visit_map_elt(
-                                    $key_expr,
-                                    $value_expr,
-                                )
-                            )
-                        )
-                    )
-                }
-            )
-        })
-        .collect();
-
-    let visitor_impl_generics = builder.from_generics(generics.clone())
-        .add_lifetime_bound("'__a")
-        .lifetime_name("'__a")
-        .build();
-
-    let where_clause = &visitor_impl_generics.where_clause;
-
-    let visitor_generics = builder.from_generics(visitor_impl_generics.clone())
-        .strip_bounds()
-        .build();
-
-    (
-        quote_item!(cx,
-            struct Visitor $visitor_impl_generics $where_clause {
-                state: usize,
-                value: $value_ty,
-            }
-        ).unwrap(),
-
-        quote_item!(cx,
-            impl $visitor_impl_generics
-            ::serde::ser::MapVisitor
-            for Visitor $visitor_generics
-            $where_clause {
-                #[inline]
-                fn visit<S>(&mut self, serializer: &mut S) -> ::std::result::Result<Option<()>, S::Error>
-                    where S: ::serde::ser::Serializer,
-                {
-                    match self.state {
-                        $arms
-                        _ => Ok(None),
-                    }
-                }
-
-                #[inline]
-                fn len(&self) -> Option<usize> {
-                    Some($len)
-                }
-            }
-        ).unwrap(),
-    )
-}

serde_test/Cargo.toml

@@ -0,0 +1,23 @@
+[package]
+name = "serde_test"
+version = "1.0.100" # remember to update html_root_url
+authors = ["Erick Tryzelaar <erick.tryzelaar@gmail.com>", "David Tolnay <dtolnay@gmail.com>"]
+license = "MIT OR Apache-2.0"
+description = "Token De/Serializer for testing De/Serialize implementations"
+homepage = "https://serde.rs"
+repository = "https://github.com/serde-rs/serde"
+documentation = "https://docs.serde.rs/serde_test/"
+keywords = ["serde", "serialization"]
+readme = "crates-io.md"
+include = ["Cargo.toml", "src/**/*.rs", "crates-io.md", "README.md", "LICENSE-APACHE", "LICENSE-MIT"]
+
+[dependencies]
+serde = { version = "1.0.60", path = "../serde" }
+
+[dev-dependencies]
+serde = { version = "1.0", path = "../serde" }
+serde_derive = { version = "1.0", path = "../serde_derive" }
+
+[badges]
+travis-ci = { repository = "serde-rs/serde" }
+appveyor = { repository = "serde-rs/serde" }

serde_test/LICENSE-APACHE

@@ -0,0 +1 @@
+../LICENSE-APACHE

serde_test/LICENSE-MIT

@@ -0,0 +1 @@
+../LICENSE-MIT

serde_test/README.md

@@ -0,0 +1 @@
+../README.md

serde_test/crates-io.md

@@ -0,0 +1 @@
+../crates-io.md

serde_test/src/assert.rs

@@ -0,0 +1,226 @@
+use serde::{Deserialize, Serialize};
+
+use de::Deserializer;
+use ser::Serializer;
+use token::Token;
+
+use std::fmt::Debug;
+
+/// Runs both `assert_ser_tokens` and `assert_de_tokens`.
+///
+/// ```edition2018
+/// # use serde::{Serialize, Deserialize};
+/// # use serde_test::{assert_tokens, Token};
+/// #
+/// # fn main() {
+/// #[derive(Serialize, Deserialize, PartialEq, Debug)]
+/// struct S {
+///     a: u8,
+///     b: u8,
+/// }
+///
+/// let s = S { a: 0, b: 0 };
+/// assert_tokens(&s, &[
+///     Token::Struct { name: "S", len: 2 },
+///     Token::Str("a"),
+///     Token::U8(0),
+///     Token::Str("b"),
+///     Token::U8(0),
+///     Token::StructEnd,
+/// ]);
+/// # }
+/// ```
+pub fn assert_tokens<'de, T>(value: &T, tokens: &'de [Token])
+where
+    T: Serialize + Deserialize<'de> + PartialEq + Debug,
+{
+    assert_ser_tokens(value, tokens);
+    assert_de_tokens(value, tokens);
+}
+
+/// Asserts that `value` serializes to the given `tokens`.
+///
+/// ```edition2018
+/// # use serde::{Serialize, Deserialize};
+/// # use serde_test::{assert_ser_tokens, Token};
+/// #
+/// # fn main() {
+/// #[derive(Serialize, Deserialize, PartialEq, Debug)]
+/// struct S {
+///     a: u8,
+///     b: u8,
+/// }
+///
+/// let s = S { a: 0, b: 0 };
+/// assert_ser_tokens(&s, &[
+///     Token::Struct { name: "S", len: 2 },
+///     Token::Str("a"),
+///     Token::U8(0),
+///     Token::Str("b"),
+///     Token::U8(0),
+///     Token::StructEnd,
+/// ]);
+/// # }
+/// ```
+pub fn assert_ser_tokens<T>(value: &T, tokens: &[Token])
+where
+    T: Serialize,
+{
+    let mut ser = Serializer::new(tokens);
+    match value.serialize(&mut ser) {
+        Ok(_) => {}
+        Err(err) => panic!("value failed to serialize: {}", err),
+    }
+
+    if ser.remaining() > 0 {
+        panic!("{} remaining tokens", ser.remaining());
+    }
+}
+
+/// Asserts that `value` serializes to the given `tokens`, and then yields
+/// `error`.
+///
+/// ```edition2018
+/// use std::sync::{Arc, Mutex};
+/// use std::thread;
+///
+/// use serde::Serialize;
+/// use serde_test::{assert_ser_tokens_error, Token};
+///
+/// #[derive(Serialize)]
+/// struct Example {
+///     lock: Arc<Mutex<u32>>,
+/// }
+///
+/// fn main() {
+///     let example = Example { lock: Arc::new(Mutex::new(0)) };
+///     let lock = example.lock.clone();
+///
+///     let _ = thread::spawn(move || {
+///         // This thread will acquire the mutex first, unwrapping the result
+///         // of `lock` because the lock has not been poisoned.
+///         let _guard = lock.lock().unwrap();
+///
+///         // This panic while holding the lock (`_guard` is in scope) will
+///         // poison the mutex.
+///         panic!()
+///     }).join();
+///
+///     let expected = &[
+///         Token::Struct { name: "Example", len: 1 },
+///         Token::Str("lock"),
+///     ];
+///     let error = "lock poison error while serializing";
+///     assert_ser_tokens_error(&example, expected, error);
+/// }
+/// ```
+pub fn assert_ser_tokens_error<T>(value: &T, tokens: &[Token], error: &str)
+where
+    T: Serialize,
+{
+    let mut ser = Serializer::new(tokens);
+    match value.serialize(&mut ser) {
+        Ok(_) => panic!("value serialized successfully"),
+        Err(e) => assert_eq!(e, *error),
+    }
+
+    if ser.remaining() > 0 {
+        panic!("{} remaining tokens", ser.remaining());
+    }
+}
+
+/// Asserts that the given `tokens` deserialize into `value`.
+///
+/// ```edition2018
+/// # use serde::{Serialize, Deserialize};
+/// # use serde_test::{assert_de_tokens, Token};
+/// #
+/// # fn main() {
+/// #[derive(Serialize, Deserialize, PartialEq, Debug)]
+/// struct S {
+///     a: u8,
+///     b: u8,
+/// }
+///
+/// let s = S { a: 0, b: 0 };
+/// assert_de_tokens(&s, &[
+///     Token::Struct { name: "S", len: 2 },
+///     Token::Str("a"),
+///     Token::U8(0),
+///     Token::Str("b"),
+///     Token::U8(0),
+///     Token::StructEnd,
+/// ]);
+/// # }
+/// ```
+pub fn assert_de_tokens<'de, T>(value: &T, tokens: &'de [Token])
+where
+    T: Deserialize<'de> + PartialEq + Debug,
+{
+    let mut de = Deserializer::new(tokens);
+    let mut deserialized_val = match T::deserialize(&mut de) {
+        Ok(v) => {
+            assert_eq!(v, *value);
+            v
+        }
+        Err(e) => panic!("tokens failed to deserialize: {}", e),
+    };
+    if de.remaining() > 0 {
+        panic!("{} remaining tokens", de.remaining());
+    }
+
+    // Do the same thing for deserialize_in_place. This isn't *great* because a
+    // no-op impl of deserialize_in_place can technically succeed here. Still,
+    // this should catch a lot of junk.
+    let mut de = Deserializer::new(tokens);
+    match T::deserialize_in_place(&mut de, &mut deserialized_val) {
+        Ok(()) => {
+            assert_eq!(deserialized_val, *value);
+        }
+        Err(e) => panic!("tokens failed to deserialize_in_place: {}", e),
+    }
+    if de.remaining() > 0 {
+        panic!("{} remaining tokens", de.remaining());
+    }
+}
+
+/// Asserts that the given `tokens` yield `error` when deserializing.
+///
+/// ```edition2018
+/// # use serde::{Serialize, Deserialize};
+/// # use serde_test::{assert_de_tokens_error, Token};
+/// #
+/// # fn main() {
+/// #[derive(Serialize, Deserialize, PartialEq, Debug)]
+/// #[serde(deny_unknown_fields)]
+/// struct S {
+///     a: u8,
+///     b: u8,
+/// }
+///
+/// assert_de_tokens_error::<S>(
+///     &[
+///         Token::Struct { name: "S", len: 2 },
+///         Token::Str("x"),
+///     ],
+///     "unknown field `x`, expected `a` or `b`",
+/// );
+/// # }
+/// ```
+pub fn assert_de_tokens_error<'de, T>(tokens: &'de [Token], error: &str)
+where
+    T: Deserialize<'de>,
+{
+    let mut de = Deserializer::new(tokens);
+    match T::deserialize(&mut de) {
+        Ok(_) => panic!("tokens deserialized successfully"),
+        Err(e) => assert_eq!(e, *error),
+    }
+
+    // There may be one token left if a peek caused the error
+    de.next_token_opt();
+
+    if de.remaining() > 0 {
+        panic!("{} remaining tokens", de.remaining());
+    }
+}

serde_test/src/configure.rs

@@ -0,0 +1,836 @@
+use std::fmt;
+
+use serde::ser::{
+    SerializeMap, SerializeSeq, SerializeStruct, SerializeStructVariant, SerializeTuple,
+    SerializeTupleStruct, SerializeTupleVariant,
+};
+use serde::{Deserialize, Deserializer, Serialize, Serializer};
+
+#[derive(Debug, PartialEq, Eq, PartialOrd, Ord)]
+pub struct Readable<T: ?Sized>(T);
+#[derive(Debug, PartialEq, Eq, PartialOrd, Ord)]
+pub struct Compact<T: ?Sized>(T);
+
+/// Trait to determine whether a value is represented in human-readable or
+/// compact form.
+///
+/// ```edition2018
+/// use serde::{Deserialize, Deserializer, Serialize, Serializer};
+/// use serde_test::{assert_tokens, Configure, Token};
+///
+/// #[derive(Debug, PartialEq)]
+/// struct Example(u8, u8);
+///
+/// impl Serialize for Example {
+///     fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+///     where
+///         S: Serializer,
+///     {
+///         if serializer.is_human_readable() {
+///             format!("{}.{}", self.0, self.1).serialize(serializer)
+///         } else {
+///             (self.0, self.1).serialize(serializer)
+///         }
+///     }
+/// }
+///
+/// impl<'de> Deserialize<'de> for Example {
+///     fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
+///     where
+///         D: Deserializer<'de>,
+///     {
+///         use serde::de::Error;
+///         if deserializer.is_human_readable() {
+///             let s = String::deserialize(deserializer)?;
+///             let parts: Vec<_> = s.split('.').collect();
+///             Ok(Example(
+///                 parts[0].parse().map_err(D::Error::custom)?,
+///                 parts[1].parse().map_err(D::Error::custom)?,
+///             ))
+///         } else {
+///             let (x, y) = Deserialize::deserialize(deserializer)?;
+///             Ok(Example(x, y))
+///         }
+///     }
+/// }
+///
+/// fn main() {
+///     assert_tokens(
+///         &Example(1, 0).compact(),
+///         &[
+///             Token::Tuple { len: 2 },
+///             Token::U8(1),
+///             Token::U8(0),
+///             Token::TupleEnd,
+///         ],
+///     );
+///     assert_tokens(&Example(1, 0).readable(), &[Token::Str("1.0")]);
+/// }
+/// ```
+pub trait Configure {
+    /// Marks `self` as using `is_human_readable == true`
+    fn readable(self) -> Readable<Self>
+    where
+        Self: Sized,
+    {
+        Readable(self)
+    }
+    /// Marks `self` as using `is_human_readable == false`
+    fn compact(self) -> Compact<Self>
+    where
+        Self: Sized,
+    {
+        Compact(self)
+    }
+}
+
+impl<T: ?Sized> Configure for T {}
+
+impl<T: ?Sized> Serialize for Readable<T>
+where
+    T: Serialize,
+{
+    #[inline]
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        self.0.serialize(Readable(serializer))
+    }
+}
+impl<T: ?Sized> Serialize for Compact<T>
+where
+    T: Serialize,
+{
+    #[inline]
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        self.0.serialize(Compact(serializer))
+    }
+}
+impl<'de, T> Deserialize<'de> for Readable<T>
+where
+    T: Deserialize<'de>,
+{
+    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
+    where
+        D: Deserializer<'de>,
+    {
+        T::deserialize(Readable(deserializer)).map(Readable)
+    }
+}
+impl<'de, T> Deserialize<'de> for Compact<T>
+where
+    T: Deserialize<'de>,
+{
+    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
+    where
+        D: Deserializer<'de>,
+    {
+        T::deserialize(Compact(deserializer)).map(Compact)
+    }
+}
+
+impl<'de, T> DeserializeSeed<'de> for Readable<T>
+where
+    T: DeserializeSeed<'de>,
+{
+    type Value = T::Value;
+
+    fn deserialize<D>(self, deserializer: D) -> Result<Self::Value, D::Error>
+    where
+        D: Deserializer<'de>,
+    {
+        self.0.deserialize(Readable(deserializer))
+    }
+}
+impl<'de, T> DeserializeSeed<'de> for Compact<T>
+where
+    T: DeserializeSeed<'de>,
+{
+    type Value = T::Value;
+
+    fn deserialize<D>(self, deserializer: D) -> Result<Self::Value, D::Error>
+    where
+        D: Deserializer<'de>,
+    {
+        self.0.deserialize(Compact(deserializer))
+    }
+}
+
+macro_rules! forward_method {
+    ($name: ident (self $(, $arg: ident : $arg_type: ty)* ) -> $return_type: ty) => {
+        fn $name (self $(, $arg : $arg_type)* ) -> $return_type {
+            (self.0).$name( $($arg),* )
+        }
+    };
+}
+
+macro_rules! forward_serialize_methods {
+    ( $( $name: ident $arg_type: ty ),* ) => {
+        $(
+            forward_method!($name(self, v : $arg_type) -> Result<Self::Ok, Self::Error>);
+        )*
+    };
+}
+
+macro_rules! impl_serializer {
+    ($wrapper:ident, $is_human_readable:expr) => {
+        impl<S> Serializer for $wrapper<S>
+        where
+            S: Serializer,
+        {
+            type Ok = S::Ok;
+            type Error = S::Error;
+
+            type SerializeSeq = $wrapper<S::SerializeSeq>;
+            type SerializeTuple = $wrapper<S::SerializeTuple>;
+            type SerializeTupleStruct = $wrapper<S::SerializeTupleStruct>;
+            type SerializeTupleVariant = $wrapper<S::SerializeTupleVariant>;
+            type SerializeMap = $wrapper<S::SerializeMap>;
+            type SerializeStruct = $wrapper<S::SerializeStruct>;
+            type SerializeStructVariant = $wrapper<S::SerializeStructVariant>;
+
+            fn is_human_readable(&self) -> bool {
+                $is_human_readable
+            }
+
+            forward_serialize_methods! {
+                serialize_bool bool,
+                serialize_i8 i8,
+                serialize_i16 i16,
+                serialize_i32 i32,
+                serialize_i64 i64,
+                serialize_u8 u8,
+                serialize_u16 u16,
+                serialize_u32 u32,
+                serialize_u64 u64,
+                serialize_f32 f32,
+                serialize_f64 f64,
+                serialize_char char,
+                serialize_str &str,
+                serialize_bytes &[u8],
+                serialize_unit_struct &'static str
+
+            }
+
+            fn serialize_unit(self) -> Result<S::Ok, S::Error> {
+                self.0.serialize_unit()
+            }
+
+            fn serialize_unit_variant(
+                self,
+                name: &'static str,
+                variant_index: u32,
+                variant: &'static str,
+            ) -> Result<S::Ok, S::Error> {
+                self.0.serialize_unit_variant(name, variant_index, variant)
+            }
+
+            fn serialize_newtype_struct<T: ?Sized>(
+                self,
+                name: &'static str,
+                value: &T,
+            ) -> Result<S::Ok, S::Error>
+            where
+                T: Serialize,
+            {
+                self.0.serialize_newtype_struct(name, &$wrapper(value))
+            }
+
+            fn serialize_newtype_variant<T: ?Sized>(
+                self,
+                name: &'static str,
+                variant_index: u32,
+                variant: &'static str,
+                value: &T,
+            ) -> Result<S::Ok, S::Error>
+            where
+                T: Serialize,
+            {
+                self.0
+                    .serialize_newtype_variant(name, variant_index, variant, &$wrapper(value))
+            }
+
+            fn serialize_none(self) -> Result<S::Ok, Self::Error> {
+                self.0.serialize_none()
+            }
+
+            fn serialize_some<T: ?Sized>(self, value: &T) -> Result<S::Ok, Self::Error>
+            where
+                T: Serialize,
+            {
+                self.0.serialize_some(&$wrapper(value))
+            }
+
+            fn serialize_seq(self, len: Option<usize>) -> Result<Self::SerializeSeq, Self::Error> {
+                self.0.serialize_seq(len).map($wrapper)
+            }
+
+            fn serialize_tuple(self, len: usize) -> Result<Self::SerializeTuple, Self::Error> {
+                self.0.serialize_tuple(len).map($wrapper)
+            }
+
+            fn serialize_tuple_struct(
+                self,
+                name: &'static str,
+                len: usize,
+            ) -> Result<Self::SerializeTupleStruct, Self::Error> {
+                self.0.serialize_tuple_struct(name, len).map($wrapper)
+            }
+
+            fn serialize_tuple_variant(
+                self,
+                name: &'static str,
+                variant_index: u32,
+                variant: &'static str,
+                len: usize,
+            ) -> Result<Self::SerializeTupleVariant, Self::Error> {
+                self.0
+                    .serialize_tuple_variant(name, variant_index, variant, len)
+                    .map($wrapper)
+            }
+
+            fn serialize_map(self, len: Option<usize>) -> Result<Self::SerializeMap, Self::Error> {
+                self.0.serialize_map(len).map($wrapper)
+            }
+
+            fn serialize_struct(
+                self,
+                name: &'static str,
+                len: usize,
+            ) -> Result<Self::SerializeStruct, Self::Error> {
+                self.0.serialize_struct(name, len).map($wrapper)
+            }
+
+            fn serialize_struct_variant(
+                self,
+                name: &'static str,
+                variant_index: u32,
+                variant: &'static str,
+                len: usize,
+            ) -> Result<Self::SerializeStructVariant, Self::Error> {
+                self.0
+                    .serialize_struct_variant(name, variant_index, variant, len)
+                    .map($wrapper)
+            }
+        }
+
+        impl<S> SerializeSeq for $wrapper<S>
+        where
+            S: SerializeSeq,
+        {
+            type Ok = S::Ok;
+            type Error = S::Error;
+            fn serialize_element<T: ?Sized>(&mut self, value: &T) -> Result<(), S::Error>
+            where
+                T: Serialize,
+            {
+                self.0.serialize_element(&$wrapper(value))
+            }
+            fn end(self) -> Result<S::Ok, S::Error> {
+                self.0.end()
+            }
+        }
+
+        impl<S> SerializeTuple for $wrapper<S>
+        where
+            S: SerializeTuple,
+        {
+            type Ok = S::Ok;
+            type Error = S::Error;
+            fn serialize_element<T: ?Sized>(&mut self, value: &T) -> Result<(), S::Error>
+            where
+                T: Serialize,
+            {
+                self.0.serialize_element(&$wrapper(value))
+            }
+            fn end(self) -> Result<S::Ok, S::Error> {
+                self.0.end()
+            }
+        }
+
+        impl<S> SerializeTupleStruct for $wrapper<S>
+        where
+            S: SerializeTupleStruct,
+        {
+            type Ok = S::Ok;
+            type Error = S::Error;
+            fn serialize_field<T: ?Sized>(&mut self, value: &T) -> Result<(), S::Error>
+            where
+                T: Serialize,
+            {
+                self.0.serialize_field(&$wrapper(value))
+            }
+            fn end(self) -> Result<S::Ok, S::Error> {
+                self.0.end()
+            }
+        }
+
+        impl<S> SerializeTupleVariant for $wrapper<S>
+        where
+            S: SerializeTupleVariant,
+        {
+            type Ok = S::Ok;
+            type Error = S::Error;
+            fn serialize_field<T: ?Sized>(&mut self, value: &T) -> Result<(), S::Error>
+            where
+                T: Serialize,
+            {
+                self.0.serialize_field(&$wrapper(value))
+            }
+            fn end(self) -> Result<S::Ok, S::Error> {
+                self.0.end()
+            }
+        }
+
+        impl<S> SerializeMap for $wrapper<S>
+        where
+            S: SerializeMap,
+        {
+            type Ok = S::Ok;
+            type Error = S::Error;
+            fn serialize_key<T: ?Sized>(&mut self, key: &T) -> Result<(), S::Error>
+            where
+                T: Serialize,
+            {
+                self.0.serialize_key(&$wrapper(key))
+            }
+            fn serialize_value<T: ?Sized>(&mut self, value: &T) -> Result<(), S::Error>
+            where
+                T: Serialize,
+            {
+                self.0.serialize_value(&$wrapper(value))
+            }
+            fn serialize_entry<K: ?Sized, V: ?Sized>(
+                &mut self,
+                key: &K,
+                value: &V,
+            ) -> Result<(), S::Error>
+            where
+                K: Serialize,
+                V: Serialize,
+            {
+                self.0.serialize_entry(key, &$wrapper(value))
+            }
+            fn end(self) -> Result<S::Ok, S::Error> {
+                self.0.end()
+            }
+        }
+
+        impl<S> SerializeStruct for $wrapper<S>
+        where
+            S: SerializeStruct,
+        {
+            type Ok = S::Ok;
+            type Error = S::Error;
+            fn serialize_field<T: ?Sized>(
+                &mut self,
+                name: &'static str,
+                field: &T,
+            ) -> Result<(), S::Error>
+            where
+                T: Serialize,
+            {
+                self.0.serialize_field(name, &$wrapper(field))
+            }
+            fn end(self) -> Result<S::Ok, S::Error> {
+                self.0.end()
+            }
+        }
+
+        impl<S> SerializeStructVariant for $wrapper<S>
+        where
+            S: SerializeStructVariant,
+        {
+            type Ok = S::Ok;
+            type Error = S::Error;
+            fn serialize_field<T: ?Sized>(
+                &mut self,
+                name: &'static str,
+                field: &T,
+            ) -> Result<(), S::Error>
+            where
+                T: Serialize,
+            {
+                self.0.serialize_field(name, &$wrapper(field))
+            }
+            fn end(self) -> Result<S::Ok, S::Error> {
+                self.0.end()
+            }
+        }
+    };
+}
+
+impl_serializer!(Readable, true);
+impl_serializer!(Compact, false);
+
+use serde::de::{DeserializeSeed, EnumAccess, Error, MapAccess, SeqAccess, VariantAccess, Visitor};
+
+macro_rules! forward_deserialize_methods {
+    ( $wrapper : ident ( $( $name: ident ),* ) ) => {
+        $(
+            fn $name<V>(self, visitor: V) -> Result<V::Value, D::Error>
+            where
+                V: Visitor<'de>,
+            {
+                (self.0).$name($wrapper(visitor))
+            }
+        )*
+    };
+}
+
+macro_rules! impl_deserializer {
+    ($wrapper:ident, $is_human_readable:expr) => {
+        impl<'de, D> Deserializer<'de> for $wrapper<D>
+        where
+            D: Deserializer<'de>,
+        {
+            type Error = D::Error;
+
+            forward_deserialize_methods! {
+                $wrapper (
+                    deserialize_any,
+                    deserialize_bool,
+                    deserialize_u8,
+                    deserialize_u16,
+                    deserialize_u32,
+                    deserialize_u64,
+                    deserialize_i8,
+                    deserialize_i16,
+                    deserialize_i32,
+                    deserialize_i64,
+                    deserialize_f32,
+                    deserialize_f64,
+                    deserialize_char,
+                    deserialize_str,
+                    deserialize_string,
+                    deserialize_bytes,
+                    deserialize_byte_buf,
+                    deserialize_option,
+                    deserialize_unit,
+                    deserialize_seq,
+                    deserialize_map,
+                    deserialize_identifier,
+                    deserialize_ignored_any
+                )
+            }
+
+            fn deserialize_unit_struct<V>(
+                self,
+                name: &'static str,
+                visitor: V,
+            ) -> Result<V::Value, D::Error>
+            where
+                V: Visitor<'de>,
+            {
+                self.0.deserialize_unit_struct(name, $wrapper(visitor))
+            }
+            fn deserialize_newtype_struct<V>(
+                self,
+                name: &'static str,
+                visitor: V,
+            ) -> Result<V::Value, D::Error>
+            where
+                V: Visitor<'de>,
+            {
+                self.0.deserialize_newtype_struct(name, $wrapper(visitor))
+            }
+            fn deserialize_tuple<V>(self, len: usize, visitor: V) -> Result<V::Value, D::Error>
+            where
+                V: Visitor<'de>,
+            {
+                self.0.deserialize_tuple(len, $wrapper(visitor))
+            }
+            fn deserialize_tuple_struct<V>(
+                self,
+                name: &'static str,
+                len: usize,
+                visitor: V,
+            ) -> Result<V::Value, D::Error>
+            where
+                V: Visitor<'de>,
+            {
+                self.0
+                    .deserialize_tuple_struct(name, len, $wrapper(visitor))
+            }
+            fn deserialize_struct<V>(
+                self,
+                name: &'static str,
+                fields: &'static [&'static str],
+                visitor: V,
+            ) -> Result<V::Value, D::Error>
+            where
+                V: Visitor<'de>,
+            {
+                self.0.deserialize_struct(name, fields, $wrapper(visitor))
+            }
+            fn deserialize_enum<V>(
+                self,
+                name: &'static str,
+                variants: &'static [&'static str],
+                visitor: V,
+            ) -> Result<V::Value, D::Error>
+            where
+                V: Visitor<'de>,
+            {
+                self.0.deserialize_enum(name, variants, $wrapper(visitor))
+            }
+
+            fn is_human_readable(&self) -> bool {
+                $is_human_readable
+            }
+        }
+
+        impl<'de, D> Visitor<'de> for $wrapper<D>
+        where
+            D: Visitor<'de>,
+        {
+            type Value = D::Value;
+            fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+                self.0.expecting(formatter)
+            }
+            fn visit_bool<E>(self, v: bool) -> Result<D::Value, E>
+            where
+                E: Error,
+            {
+                self.0.visit_bool(v)
+            }
+            fn visit_i8<E>(self, v: i8) -> Result<D::Value, E>
+            where
+                E: Error,
+            {
+                self.0.visit_i8(v)
+            }
+            fn visit_i16<E>(self, v: i16) -> Result<D::Value, E>
+            where
+                E: Error,
+            {
+                self.0.visit_i16(v)
+            }
+            fn visit_i32<E>(self, v: i32) -> Result<D::Value, E>
+            where
+                E: Error,
+            {
+                self.0.visit_i32(v)
+            }
+            fn visit_i64<E>(self, v: i64) -> Result<D::Value, E>
+            where
+                E: Error,
+            {
+                self.0.visit_i64(v)
+            }
+            fn visit_u8<E>(self, v: u8) -> Result<D::Value, E>
+            where
+                E: Error,
+            {
+                self.0.visit_u8(v)
+            }
+            fn visit_u16<E>(self, v: u16) -> Result<D::Value, E>
+            where
+                E: Error,
+            {
+                self.0.visit_u16(v)
+            }
+            fn visit_u32<E>(self, v: u32) -> Result<D::Value, E>
+            where
+                E: Error,
+            {
+                self.0.visit_u32(v)
+            }
+            fn visit_u64<E>(self, v: u64) -> Result<D::Value, E>
+            where
+                E: Error,
+            {
+                self.0.visit_u64(v)
+            }
+            fn visit_f32<E>(self, v: f32) -> Result<D::Value, E>
+            where
+                E: Error,
+            {
+                self.0.visit_f32(v)
+            }
+            fn visit_f64<E>(self, v: f64) -> Result<D::Value, E>
+            where
+                E: Error,
+            {
+                self.0.visit_f64(v)
+            }
+            fn visit_char<E>(self, v: char) -> Result<D::Value, E>
+            where
+                E: Error,
+            {
+                self.0.visit_char(v)
+            }
+            fn visit_str<E>(self, v: &str) -> Result<D::Value, E>
+            where
+                E: Error,
+            {
+                self.0.visit_str(v)
+            }
+            fn visit_borrowed_str<E>(self, v: &'de str) -> Result<D::Value, E>
+            where
+                E: Error,
+            {
+                self.0.visit_borrowed_str(v)
+            }
+            fn visit_string<E>(self, v: String) -> Result<D::Value, E>
+            where
+                E: Error,
+            {
+                self.0.visit_string(v)
+            }
+            fn visit_bytes<E>(self, v: &[u8]) -> Result<D::Value, E>
+            where
+                E: Error,
+            {
+                self.0.visit_bytes(v)
+            }
+            fn visit_borrowed_bytes<E>(self, v: &'de [u8]) -> Result<D::Value, E>
+            where
+                E: Error,
+            {
+                self.0.visit_borrowed_bytes(v)
+            }
+            fn visit_byte_buf<E>(self, v: Vec<u8>) -> Result<D::Value, E>
+            where
+                E: Error,
+            {
+                self.0.visit_byte_buf(v)
+            }
+            fn visit_none<E>(self) -> Result<D::Value, E>
+            where
+                E: Error,
+            {
+                self.0.visit_none()
+            }
+            fn visit_some<D2>(self, deserializer: D2) -> Result<Self::Value, D2::Error>
+            where
+                D2: Deserializer<'de>,
+            {
+                self.0.visit_some($wrapper(deserializer))
+            }
+            fn visit_unit<E>(self) -> Result<D::Value, E>
+            where
+                E: Error,
+            {
+                self.0.visit_unit()
+            }
+            fn visit_newtype_struct<D2>(self, deserializer: D2) -> Result<Self::Value, D2::Error>
+            where
+                D2: Deserializer<'de>,
+            {
+                self.0.visit_newtype_struct($wrapper(deserializer))
+            }
+            fn visit_seq<V>(self, seq: V) -> Result<D::Value, V::Error>
+            where
+                V: SeqAccess<'de>,
+            {
+                self.0.visit_seq($wrapper(seq))
+            }
+            fn visit_map<V>(self, map: V) -> Result<D::Value, V::Error>
+            where
+                V: MapAccess<'de>,
+            {
+                self.0.visit_map($wrapper(map))
+            }
+            fn visit_enum<V>(self, data: V) -> Result<D::Value, V::Error>
+            where
+                V: EnumAccess<'de>,
+            {
+                self.0.visit_enum($wrapper(data))
+            }
+        }
+
+        impl<'de, D> SeqAccess<'de> for $wrapper<D>
+        where
+            D: SeqAccess<'de>,
+        {
+            type Error = D::Error;
+            fn next_element_seed<T>(&mut self, seed: T) -> Result<Option<T::Value>, D::Error>
+            where
+                T: DeserializeSeed<'de>,
+            {
+                self.0.next_element_seed($wrapper(seed))
+            }
+            fn size_hint(&self) -> Option<usize> {
+                self.0.size_hint()
+            }
+        }
+
+        impl<'de, D> MapAccess<'de> for $wrapper<D>
+        where
+            D: MapAccess<'de>,
+        {
+            type Error = D::Error;
+            fn next_key_seed<K>(&mut self, seed: K) -> Result<Option<K::Value>, D::Error>
+            where
+                K: DeserializeSeed<'de>,
+            {
+                self.0.next_key_seed($wrapper(seed))
+            }
+            fn next_value_seed<V>(&mut self, seed: V) -> Result<V::Value, D::Error>
+            where
+                V: DeserializeSeed<'de>,
+            {
+                self.0.next_value_seed($wrapper(seed))
+            }
+            fn size_hint(&self) -> Option<usize> {
+                self.0.size_hint()
+            }
+        }
+
+        impl<'de, D> EnumAccess<'de> for $wrapper<D>
+        where
+            D: EnumAccess<'de>,
+        {
+            type Error = D::Error;
+            type Variant = $wrapper<D::Variant>;
+            fn variant_seed<V>(self, seed: V) -> Result<(V::Value, Self::Variant), Self::Error>
+            where
+                V: DeserializeSeed<'de>,
+            {
+                self.0
+                    .variant_seed($wrapper(seed))
+                    .map(|(value, variant)| (value, $wrapper(variant)))
+            }
+        }
+
+        impl<'de, D> VariantAccess<'de> for $wrapper<D>
+        where
+            D: VariantAccess<'de>,
+        {
+            type Error = D::Error;
+            fn unit_variant(self) -> Result<(), D::Error> {
+                self.0.unit_variant()
+            }
+            fn newtype_variant_seed<T>(self, seed: T) -> Result<T::Value, D::Error>
+            where
+                T: DeserializeSeed<'de>,
+            {
+                self.0.newtype_variant_seed($wrapper(seed))
+            }
+            fn tuple_variant<V>(self, len: usize, visitor: V) -> Result<V::Value, D::Error>
+            where
+                V: Visitor<'de>,
+            {
+                self.0.tuple_variant(len, $wrapper(visitor))
+            }
+            fn struct_variant<V>(
+                self,
+                fields: &'static [&'static str],
+                visitor: V,
+            ) -> Result<V::Value, D::Error>
+            where
+                V: Visitor<'de>,
+            {
+                self.0.struct_variant(fields, $wrapper(visitor))
+            }
+        }
+    };
+}
+
+impl_deserializer!(Readable, true);
+impl_deserializer!(Compact, false);

serde_test/src/de.rs

@@ -0,0 +1,657 @@
+use serde::de::value::{MapAccessDeserializer, SeqAccessDeserializer};
+use serde::de::{
+    self, Deserialize, DeserializeSeed, EnumAccess, IntoDeserializer, MapAccess, SeqAccess,
+    VariantAccess, Visitor,
+};
+
+use error::Error;
+use token::Token;
+
+#[derive(Debug)]
+pub struct Deserializer<'de> {
+    tokens: &'de [Token],
+}
+
+macro_rules! assert_next_token {
+    ($de:expr, $expected:expr) => {
+        match $de.next_token_opt() {
+            Some(token) if token == $expected => {}
+            Some(other) => panic!(
+                "expected Token::{} but deserialization wants Token::{}",
+                other, $expected
+            ),
+            None => panic!(
+                "end of tokens but deserialization wants Token::{}",
+                $expected
+            ),
+        }
+    };
+}
+
+macro_rules! unexpected {
+    ($token:expr) => {
+        panic!("deserialization did not expect this token: {}", $token)
+    };
+}
+
+macro_rules! end_of_tokens {
+    () => {
+        panic!("ran out of tokens to deserialize")
+    };
+}
+
+impl<'de> Deserializer<'de> {
+    pub fn new(tokens: &'de [Token]) -> Self {
+        Deserializer { tokens: tokens }
+    }
+
+    fn peek_token_opt(&self) -> Option<Token> {
+        self.tokens.first().cloned()
+    }
+
+    fn peek_token(&self) -> Token {
+        match self.peek_token_opt() {
+            Some(token) => token,
+            None => end_of_tokens!(),
+        }
+    }
+
+    pub fn next_token_opt(&mut self) -> Option<Token> {
+        match self.tokens.split_first() {
+            Some((&first, rest)) => {
+                self.tokens = rest;
+                Some(first)
+            }
+            None => None,
+        }
+    }
+
+    fn next_token(&mut self) -> Token {
+        match self.tokens.split_first() {
+            Some((&first, rest)) => {
+                self.tokens = rest;
+                first
+            }
+            None => end_of_tokens!(),
+        }
+    }
+
+    pub fn remaining(&self) -> usize {
+        self.tokens.len()
+    }
+
+    fn visit_seq<V>(
+        &mut self,
+        len: Option<usize>,
+        end: Token,
+        visitor: V,
+    ) -> Result<V::Value, Error>
+    where
+        V: Visitor<'de>,
+    {
+        let value = visitor.visit_seq(DeserializerSeqVisitor {
+            de: self,
+            len: len,
+            end: end,
+        })?;
+        assert_next_token!(self, end);
+        Ok(value)
+    }
+
+    fn visit_map<V>(
+        &mut self,
+        len: Option<usize>,
+        end: Token,
+        visitor: V,
+    ) -> Result<V::Value, Error>
+    where
+        V: Visitor<'de>,
+    {
+        let value = visitor.visit_map(DeserializerMapVisitor {
+            de: self,
+            len: len,
+            end: end,
+        })?;
+        assert_next_token!(self, end);
+        Ok(value)
+    }
+}
+
+impl<'de, 'a> de::Deserializer<'de> for &'a mut Deserializer<'de> {
+    type Error = Error;
+
+    forward_to_deserialize_any! {
+        bool i8 i16 i32 i64 i128 u8 u16 u32 u64 u128 f32 f64 char str string
+        bytes byte_buf unit seq map identifier ignored_any
+    }
+
+    fn deserialize_any<V>(self, visitor: V) -> Result<V::Value, Error>
+    where
+        V: Visitor<'de>,
+    {
+        let token = self.next_token();
+        match token {
+            Token::Bool(v) => visitor.visit_bool(v),
+            Token::I8(v) => visitor.visit_i8(v),
+            Token::I16(v) => visitor.visit_i16(v),
+            Token::I32(v) => visitor.visit_i32(v),
+            Token::I64(v) => visitor.visit_i64(v),
+            Token::U8(v) => visitor.visit_u8(v),
+            Token::U16(v) => visitor.visit_u16(v),
+            Token::U32(v) => visitor.visit_u32(v),
+            Token::U64(v) => visitor.visit_u64(v),
+            Token::F32(v) => visitor.visit_f32(v),
+            Token::F64(v) => visitor.visit_f64(v),
+            Token::Char(v) => visitor.visit_char(v),
+            Token::Str(v) => visitor.visit_str(v),
+            Token::BorrowedStr(v) => visitor.visit_borrowed_str(v),
+            Token::String(v) => visitor.visit_string(v.to_owned()),
+            Token::Bytes(v) => visitor.visit_bytes(v),
+            Token::BorrowedBytes(v) => visitor.visit_borrowed_bytes(v),
+            Token::ByteBuf(v) => visitor.visit_byte_buf(v.to_vec()),
+            Token::None => visitor.visit_none(),
+            Token::Some => visitor.visit_some(self),
+            Token::Unit | Token::UnitStruct { .. } => visitor.visit_unit(),
+            Token::NewtypeStruct { .. } => visitor.visit_newtype_struct(self),
+            Token::Seq { len } => self.visit_seq(len, Token::SeqEnd, visitor),
+            Token::Tuple { len } => self.visit_seq(Some(len), Token::TupleEnd, visitor),
+            Token::TupleStruct { len, .. } => {
+                self.visit_seq(Some(len), Token::TupleStructEnd, visitor)
+            }
+            Token::Map { len } => self.visit_map(len, Token::MapEnd, visitor),
+            Token::Struct { len, .. } => self.visit_map(Some(len), Token::StructEnd, visitor),
+            Token::Enum { .. } => {
+                let variant = self.next_token();
+                let next = self.peek_token();
+                match (variant, next) {
+                    (Token::Str(variant), Token::Unit) => {
+                        self.next_token();
+                        visitor.visit_str(variant)
+                    }
+                    (Token::Bytes(variant), Token::Unit) => {
+                        self.next_token();
+                        visitor.visit_bytes(variant)
+                    }
+                    (Token::U32(variant), Token::Unit) => {
+                        self.next_token();
+                        visitor.visit_u32(variant)
+                    }
+                    (variant, Token::Unit) => unexpected!(variant),
+                    (variant, _) => {
+                        visitor.visit_map(EnumMapVisitor::new(self, variant, EnumFormat::Any))
+                    }
+                }
+            }
+            Token::UnitVariant { variant, .. } => visitor.visit_str(variant),
+            Token::NewtypeVariant { variant, .. } => visitor.visit_map(EnumMapVisitor::new(
+                self,
+                Token::Str(variant),
+                EnumFormat::Any,
+            )),
+            Token::TupleVariant { variant, .. } => visitor.visit_map(EnumMapVisitor::new(
+                self,
+                Token::Str(variant),
+                EnumFormat::Seq,
+            )),
+            Token::StructVariant { variant, .. } => visitor.visit_map(EnumMapVisitor::new(
+                self,
+                Token::Str(variant),
+                EnumFormat::Map,
+            )),
+            Token::SeqEnd
+            | Token::TupleEnd
+            | Token::TupleStructEnd
+            | Token::MapEnd
+            | Token::StructEnd
+            | Token::TupleVariantEnd
+            | Token::StructVariantEnd => {
+                unexpected!(token);
+            }
+        }
+    }
+
+    fn deserialize_option<V>(self, visitor: V) -> Result<V::Value, Error>
+    where
+        V: Visitor<'de>,
+    {
+        match self.peek_token() {
+            Token::Unit | Token::None => {
+                self.next_token();
+                visitor.visit_none()
+            }
+            Token::Some => {
+                self.next_token();
+                visitor.visit_some(self)
+            }
+            _ => self.deserialize_any(visitor),
+        }
+    }
+
+    fn deserialize_enum<V>(
+        self,
+        name: &'static str,
+        _variants: &'static [&'static str],
+        visitor: V,
+    ) -> Result<V::Value, Error>
+    where
+        V: Visitor<'de>,
+    {
+        match self.peek_token() {
+            Token::Enum { name: n } if name == n => {
+                self.next_token();
+
+                visitor.visit_enum(DeserializerEnumVisitor { de: self })
+            }
+            Token::UnitVariant { name: n, .. }
+            | Token::NewtypeVariant { name: n, .. }
+            | Token::TupleVariant { name: n, .. }
+            | Token::StructVariant { name: n, .. }
+                if name == n =>
+            {
+                visitor.visit_enum(DeserializerEnumVisitor { de: self })
+            }
+            _ => {
+                unexpected!(self.next_token());
+            }
+        }
+    }
+
+    fn deserialize_unit_struct<V>(self, name: &'static str, visitor: V) -> Result<V::Value, Error>
+    where
+        V: Visitor<'de>,
+    {
+        match self.peek_token() {
+            Token::UnitStruct { .. } => {
+                assert_next_token!(self, Token::UnitStruct { name: name });
+                visitor.visit_unit()
+            }
+            _ => self.deserialize_any(visitor),
+        }
+    }
+
+    fn deserialize_newtype_struct<V>(
+        self,
+        name: &'static str,
+        visitor: V,
+    ) -> Result<V::Value, Error>
+    where
+        V: Visitor<'de>,
+    {
+        match self.peek_token() {
+            Token::NewtypeStruct { .. } => {
+                assert_next_token!(self, Token::NewtypeStruct { name: name });
+                visitor.visit_newtype_struct(self)
+            }
+            _ => self.deserialize_any(visitor),
+        }
+    }
+
+    fn deserialize_tuple<V>(self, len: usize, visitor: V) -> Result<V::Value, Error>
+    where
+        V: Visitor<'de>,
+    {
+        match self.peek_token() {
+            Token::Unit | Token::UnitStruct { .. } => {
+                self.next_token();
+                visitor.visit_unit()
+            }
+            Token::Seq { .. } => {
+                self.next_token();
+                self.visit_seq(Some(len), Token::SeqEnd, visitor)
+            }
+            Token::Tuple { .. } => {
+                self.next_token();
+                self.visit_seq(Some(len), Token::TupleEnd, visitor)
+            }
+            Token::TupleStruct { .. } => {
+                self.next_token();
+                self.visit_seq(Some(len), Token::TupleStructEnd, visitor)
+            }
+            _ => self.deserialize_any(visitor),
+        }
+    }
+
+    fn deserialize_tuple_struct<V>(
+        self,
+        name: &'static str,
+        len: usize,
+        visitor: V,
+    ) -> Result<V::Value, Error>
+    where
+        V: Visitor<'de>,
+    {
+        match self.peek_token() {
+            Token::Unit => {
+                self.next_token();
+                visitor.visit_unit()
+            }
+            Token::UnitStruct { .. } => {
+                assert_next_token!(self, Token::UnitStruct { name: name });
+                visitor.visit_unit()
+            }
+            Token::Seq { .. } => {
+                self.next_token();
+                self.visit_seq(Some(len), Token::SeqEnd, visitor)
+            }
+            Token::Tuple { .. } => {
+                self.next_token();
+                self.visit_seq(Some(len), Token::TupleEnd, visitor)
+            }
+            Token::TupleStruct { len: n, .. } => {
+                assert_next_token!(self, Token::TupleStruct { name: name, len: n });
+                self.visit_seq(Some(len), Token::TupleStructEnd, visitor)
+            }
+            _ => self.deserialize_any(visitor),
+        }
+    }
+
+    fn deserialize_struct<V>(
+        self,
+        name: &'static str,
+        fields: &'static [&'static str],
+        visitor: V,
+    ) -> Result<V::Value, Error>
+    where
+        V: Visitor<'de>,
+    {
+        match self.peek_token() {
+            Token::Struct { len: n, .. } => {
+                assert_next_token!(self, Token::Struct { name: name, len: n });
+                self.visit_map(Some(fields.len()), Token::StructEnd, visitor)
+            }
+            Token::Map { .. } => {
+                self.next_token();
+                self.visit_map(Some(fields.len()), Token::MapEnd, visitor)
+            }
+            _ => self.deserialize_any(visitor),
+        }
+    }
+
+    fn is_human_readable(&self) -> bool {
+        panic!(
+            "Types which have different human-readable and compact representations \
+             must explicitly mark their test cases with `serde_test::Configure`"
+        );
+    }
+}
+
+//////////////////////////////////////////////////////////////////////////
+
+struct DeserializerSeqVisitor<'a, 'de: 'a> {
+    de: &'a mut Deserializer<'de>,
+    len: Option<usize>,
+    end: Token,
+}
+
+impl<'de, 'a> SeqAccess<'de> for DeserializerSeqVisitor<'a, 'de> {
+    type Error = Error;
+
+    fn next_element_seed<T>(&mut self, seed: T) -> Result<Option<T::Value>, Error>
+    where
+        T: DeserializeSeed<'de>,
+    {
+        if self.de.peek_token_opt() == Some(self.end) {
+            return Ok(None);
+        }
+        self.len = self.len.map(|len| len.saturating_sub(1));
+        seed.deserialize(&mut *self.de).map(Some)
+    }
+
+    fn size_hint(&self) -> Option<usize> {
+        self.len
+    }
+}
+
+//////////////////////////////////////////////////////////////////////////
+
+struct DeserializerMapVisitor<'a, 'de: 'a> {
+    de: &'a mut Deserializer<'de>,
+    len: Option<usize>,
+    end: Token,
+}
+
+impl<'de, 'a> MapAccess<'de> for DeserializerMapVisitor<'a, 'de> {
+    type Error = Error;
+
+    fn next_key_seed<K>(&mut self, seed: K) -> Result<Option<K::Value>, Error>
+    where
+        K: DeserializeSeed<'de>,
+    {
+        if self.de.peek_token_opt() == Some(self.end) {
+            return Ok(None);
+        }
+        self.len = self.len.map(|len| len.saturating_sub(1));
+        seed.deserialize(&mut *self.de).map(Some)
+    }
+
+    fn next_value_seed<V>(&mut self, seed: V) -> Result<V::Value, Error>
+    where
+        V: DeserializeSeed<'de>,
+    {
+        seed.deserialize(&mut *self.de)
+    }
+
+    fn size_hint(&self) -> Option<usize> {
+        self.len
+    }
+}
+
+//////////////////////////////////////////////////////////////////////////
+
+struct DeserializerEnumVisitor<'a, 'de: 'a> {
+    de: &'a mut Deserializer<'de>,
+}
+
+impl<'de, 'a> EnumAccess<'de> for DeserializerEnumVisitor<'a, 'de> {
+    type Error = Error;
+    type Variant = Self;
+
+    fn variant_seed<V>(self, seed: V) -> Result<(V::Value, Self), Error>
+    where
+        V: DeserializeSeed<'de>,
+    {
+        match self.de.peek_token() {
+            Token::UnitVariant { variant: v, .. }
+            | Token::NewtypeVariant { variant: v, .. }
+            | Token::TupleVariant { variant: v, .. }
+            | Token::StructVariant { variant: v, .. } => {
+                let de = v.into_deserializer();
+                let value = seed.deserialize(de)?;
+                Ok((value, self))
+            }
+            _ => {
+                let value = seed.deserialize(&mut *self.de)?;
+                Ok((value, self))
+            }
+        }
+    }
+}
+
+impl<'de, 'a> VariantAccess<'de> for DeserializerEnumVisitor<'a, 'de> {
+    type Error = Error;
+
+    fn unit_variant(self) -> Result<(), Error> {
+        match self.de.peek_token() {
+            Token::UnitVariant { .. } => {
+                self.de.next_token();
+                Ok(())
+            }
+            _ => Deserialize::deserialize(self.de),
+        }
+    }
+
+    fn newtype_variant_seed<T>(self, seed: T) -> Result<T::Value, Self::Error>
+    where
+        T: DeserializeSeed<'de>,
+    {
+        match self.de.peek_token() {
+            Token::NewtypeVariant { .. } => {
+                self.de.next_token();
+                seed.deserialize(self.de)
+            }
+            _ => seed.deserialize(self.de),
+        }
+    }
+
+    fn tuple_variant<V>(self, len: usize, visitor: V) -> Result<V::Value, Error>
+    where
+        V: Visitor<'de>,
+    {
+        match self.de.peek_token() {
+            Token::TupleVariant { len: enum_len, .. } => {
+                let token = self.de.next_token();
+
+                if len == enum_len {
+                    self.de
+                        .visit_seq(Some(len), Token::TupleVariantEnd, visitor)
+                } else {
+                    unexpected!(token);
+                }
+            }
+            Token::Seq {
+                len: Some(enum_len),
+            } => {
+                let token = self.de.next_token();
+
+                if len == enum_len {
+                    self.de.visit_seq(Some(len), Token::SeqEnd, visitor)
+                } else {
+                    unexpected!(token);
+                }
+            }
+            _ => de::Deserializer::deserialize_any(self.de, visitor),
+        }
+    }
+
+    fn struct_variant<V>(
+        self,
+        fields: &'static [&'static str],
+        visitor: V,
+    ) -> Result<V::Value, Error>
+    where
+        V: Visitor<'de>,
+    {
+        match self.de.peek_token() {
+            Token::StructVariant { len: enum_len, .. } => {
+                let token = self.de.next_token();
+
+                if fields.len() == enum_len {
+                    self.de
+                        .visit_map(Some(fields.len()), Token::StructVariantEnd, visitor)
+                } else {
+                    unexpected!(token);
+                }
+            }
+            Token::Map {
+                len: Some(enum_len),
+            } => {
+                let token = self.de.next_token();
+
+                if fields.len() == enum_len {
+                    self.de
+                        .visit_map(Some(fields.len()), Token::MapEnd, visitor)
+                } else {
+                    unexpected!(token);
+                }
+            }
+            _ => de::Deserializer::deserialize_any(self.de, visitor),
+        }
+    }
+}
+
+//////////////////////////////////////////////////////////////////////////
+
+struct EnumMapVisitor<'a, 'de: 'a> {
+    de: &'a mut Deserializer<'de>,
+    variant: Option<Token>,
+    format: EnumFormat,
+}
+
+enum EnumFormat {
+    Seq,
+    Map,
+    Any,
+}
+
+impl<'a, 'de> EnumMapVisitor<'a, 'de> {
+    fn new(de: &'a mut Deserializer<'de>, variant: Token, format: EnumFormat) -> Self {
+        EnumMapVisitor {
+            de: de,
+            variant: Some(variant),
+            format: format,
+        }
+    }
+}
+
+impl<'de, 'a> MapAccess<'de> for EnumMapVisitor<'a, 'de> {
+    type Error = Error;
+
+    fn next_key_seed<K>(&mut self, seed: K) -> Result<Option<K::Value>, Error>
+    where
+        K: DeserializeSeed<'de>,
+    {
+        match self.variant.take() {
+            Some(Token::Str(variant)) => seed.deserialize(variant.into_deserializer()).map(Some),
+            Some(Token::Bytes(variant)) => seed
+                .deserialize(BytesDeserializer { value: variant })
+                .map(Some),
+            Some(Token::U32(variant)) => seed.deserialize(variant.into_deserializer()).map(Some),
+            Some(other) => unexpected!(other),
+            None => Ok(None),
+        }
+    }
+
+    fn next_value_seed<V>(&mut self, seed: V) -> Result<V::Value, Error>
+    where
+        V: DeserializeSeed<'de>,
+    {
+        match self.format {
+            EnumFormat::Seq => {
+                let value = {
+                    let visitor = DeserializerSeqVisitor {
+                        de: self.de,
+                        len: None,
+                        end: Token::TupleVariantEnd,
+                    };
+                    seed.deserialize(SeqAccessDeserializer::new(visitor))?
+                };
+                assert_next_token!(self.de, Token::TupleVariantEnd);
+                Ok(value)
+            }
+            EnumFormat::Map => {
+                let value = {
+                    let visitor = DeserializerMapVisitor {
+                        de: self.de,
+                        len: None,
+                        end: Token::StructVariantEnd,
+                    };
+                    seed.deserialize(MapAccessDeserializer::new(visitor))?
+                };
+                assert_next_token!(self.de, Token::StructVariantEnd);
+                Ok(value)
+            }
+            EnumFormat::Any => seed.deserialize(&mut *self.de),
+        }
+    }
+}
+
+struct BytesDeserializer {
+    value: &'static [u8],
+}
+
+impl<'de> de::Deserializer<'de> for BytesDeserializer {
+    type Error = Error;
+
+    fn deserialize_any<V>(self, visitor: V) -> Result<V::Value, Self::Error>
+    where
+        V: de::Visitor<'de>,
+    {
+        visitor.visit_bytes(self.value)
+    }
+
+    forward_to_deserialize_any! {
+        bool i8 i16 i32 i64 i128 u8 u16 u32 u64 u128 f32 f64 char str string
+        bytes byte_buf option unit unit_struct newtype_struct seq tuple
+        tuple_struct map struct enum identifier ignored_any
+    }
+}

serde_test/src/error.rs

@@ -0,0 +1,43 @@
+use std::error;
+use std::fmt::{self, Display};
+
+use serde::{de, ser};
+
+#[derive(Clone, Debug)]
+pub struct Error {
+    msg: String,
+}
+
+impl ser::Error for Error {
+    fn custom<T: Display>(msg: T) -> Self {
+        Error {
+            msg: msg.to_string(),
+        }
+    }
+}
+
+impl de::Error for Error {
+    fn custom<T: Display>(msg: T) -> Self {
+        Error {
+            msg: msg.to_string(),
+        }
+    }
+}
+
+impl fmt::Display for Error {
+    fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+        formatter.write_str(&self.msg)
+    }
+}
+
+impl error::Error for Error {
+    fn description(&self) -> &str {
+        &self.msg
+    }
+}
+
+impl PartialEq<str> for Error {
+    fn eq(&self, other: &str) -> bool {
+        self.msg == other
+    }
+}

serde_test/src/lib.rs

@@ -0,0 +1,186 @@
+//! This crate provides a convenient concise way to write unit tests for
+//! implementations of [`Serialize`] and [`Deserialize`].
+//!
+//! [`Serialize`]: https://docs.serde.rs/serde/ser/trait.Serialize.html
+//! [`Deserialize`]: https://docs.serde.rs/serde/de/trait.Deserialize.html
+//!
+//! The `Serialize` impl for a value can be characterized by the sequence of
+//! [`Serializer`] calls that are made in the course of serializing the value,
+//! so `serde_test` provides a [`Token`] abstraction which corresponds roughly
+//! to `Serializer` method calls. There is an [`assert_ser_tokens`] function to
+//! test that a value serializes to a particular sequence of method calls, an
+//! [`assert_de_tokens`] function to test that a value can be deserialized from
+//! a particular sequence of method calls, and an [`assert_tokens`] function to
+//! test both directions. There are also functions to test expected failure
+//! conditions.
+//!
+//! [`Serializer`]: https://docs.serde.rs/serde/ser/trait.Serializer.html
+//! [`Token`]: https://docs.serde.rs/serde_test/enum.Token.html
+//! [`assert_ser_tokens`]: https://docs.serde.rs/serde_test/fn.assert_ser_tokens.html
+//! [`assert_de_tokens`]: https://docs.serde.rs/serde_test/fn.assert_de_tokens.html
+//! [`assert_tokens`]: https://docs.serde.rs/serde_test/fn.assert_tokens.html
+//!
+//! Here is an example from the [`linked-hash-map`] crate.
+//!
+//! [`linked-hash-map`]: https://github.com/contain-rs/linked-hash-map
+//!
+//! ```edition2018
+//! # const IGNORE: &str = stringify! {
+//! use linked_hash_map::LinkedHashMap;
+//! # };
+//! use serde_test::{Token, assert_tokens};
+//!
+//! # use std::fmt;
+//! # use std::marker::PhantomData;
+//! #
+//! # use serde::ser::{Serialize, Serializer, SerializeMap};
+//! # use serde::de::{Deserialize, Deserializer, Visitor, MapAccess};
+//! #
+//! # // Dumb imitation of LinkedHashMap.
+//! # #[derive(PartialEq, Debug)]
+//! # struct LinkedHashMap<K, V>(Vec<(K, V)>);
+//! #
+//! # impl<K, V> LinkedHashMap<K, V> {
+//! #     fn new() -> Self {
+//! #         LinkedHashMap(Vec::new())
+//! #     }
+//! #
+//! #     fn insert(&mut self, k: K, v: V) {
+//! #         self.0.push((k, v));
+//! #     }
+//! # }
+//! #
+//! # impl<K, V> Serialize for LinkedHashMap<K, V>
+//! # where
+//! #     K: Serialize,
+//! #     V: Serialize,
+//! # {
+//! #     fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+//! #     where
+//! #         S: Serializer,
+//! #     {
+//! #         let mut map = serializer.serialize_map(Some(self.0.len()))?;
+//! #         for &(ref k, ref v) in &self.0 {
+//! #             map.serialize_entry(k, v)?;
+//! #         }
+//! #         map.end()
+//! #     }
+//! # }
+//! #
+//! # struct LinkedHashMapVisitor<K, V>(PhantomData<(K, V)>);
+//! #
+//! # impl<'de, K, V> Visitor<'de> for LinkedHashMapVisitor<K, V>
+//! # where
+//! #     K: Deserialize<'de>,
+//! #     V: Deserialize<'de>,
+//! # {
+//! #     type Value = LinkedHashMap<K, V>;
+//! #
+//! #     fn expecting(&self, _: &mut fmt::Formatter) -> fmt::Result {
+//! #         unimplemented!()
+//! #     }
+//! #
+//! #     fn visit_map<M>(self, mut access: M) -> Result<Self::Value, M::Error>
+//! #     where
+//! #         M: MapAccess<'de>,
+//! #     {
+//! #         let mut map = LinkedHashMap::new();
+//! #         while let Some((key, value)) = access.next_entry()? {
+//! #             map.insert(key, value);
+//! #         }
+//! #         Ok(map)
+//! #     }
+//! # }
+//! #
+//! # impl<'de, K, V> Deserialize<'de> for LinkedHashMap<K, V>
+//! # where
+//! #     K: Deserialize<'de>,
+//! #     V: Deserialize<'de>,
+//! # {
+//! #     fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
+//! #     where
+//! #         D: Deserializer<'de>,
+//! #     {
+//! #         deserializer.deserialize_map(LinkedHashMapVisitor(PhantomData))
+//! #     }
+//! # }
+//! #
+//! #[test]
+//! # fn not_a_test_ser_de_empty() {}
+//! fn test_ser_de_empty() {
+//!     let map = LinkedHashMap::<char, u32>::new();
+//!
+//!     assert_tokens(&map, &[
+//!         Token::Map { len: Some(0) },
+//!         Token::MapEnd,
+//!     ]);
+//! }
+//!
+//! #[test]
+//! # fn not_a_test_ser_de() {}
+//! fn test_ser_de() {
+//!     let mut map = LinkedHashMap::new();
+//!     map.insert('b', 20);
+//!     map.insert('a', 10);
+//!     map.insert('c', 30);
+//!
+//!     assert_tokens(&map, &[
+//!         Token::Map { len: Some(3) },
+//!         Token::Char('b'),
+//!         Token::I32(20),
+//!
+//!         Token::Char('a'),
+//!         Token::I32(10),
+//!
+//!         Token::Char('c'),
+//!         Token::I32(30),
+//!         Token::MapEnd,
+//!     ]);
+//! }
+//! #
+//! # fn main() {
+//! #     test_ser_de_empty();
+//! #     test_ser_de();
+//! # }
+//! ```
+
+#![doc(html_root_url = "https://docs.rs/serde_test/1.0.100")]
+#![cfg_attr(feature = "cargo-clippy", allow(renamed_and_removed_lints))]
+#![cfg_attr(feature = "cargo-clippy", deny(clippy, clippy_pedantic))]
+// Ignored clippy lints
+#![cfg_attr(feature = "cargo-clippy", allow(float_cmp))]
+// Ignored clippy_pedantic lints
+#![cfg_attr(
+    feature = "cargo-clippy",
+    allow(
+        empty_line_after_outer_attr,
+        missing_docs_in_private_items,
+        module_name_repetitions,
+        redundant_field_names,
+        use_debug,
+        use_self
+    )
+)]
+
+#[macro_use]
+extern crate serde;
+
+mod de;
+mod error;
+mod ser;
+
+mod assert;
+mod configure;
+mod token;
+
+pub use assert::{
+    assert_de_tokens, assert_de_tokens_error, assert_ser_tokens, assert_ser_tokens_error,
+    assert_tokens,
+};
+pub use token::Token;
+
+pub use configure::{Compact, Configure, Readable};
+
+// Not public API.
+#[doc(hidden)]
+pub use de::Deserializer;

serde_test/src/ser.rs

@@ -0,0 +1,464 @@
+use serde::{ser, Serialize};
+
+use error::Error;
+use token::Token;
+
+/// A `Serializer` that ensures that a value serializes to a given list of
+/// tokens.
+#[derive(Debug)]
+pub struct Serializer<'a> {
+    tokens: &'a [Token],
+}
+
+impl<'a> Serializer<'a> {
+    /// Creates the serializer.
+    pub fn new(tokens: &'a [Token]) -> Self {
+        Serializer { tokens: tokens }
+    }
+
+    /// Pulls the next token off of the serializer, ignoring it.
+    fn next_token(&mut self) -> Option<Token> {
+        if let Some((&first, rest)) = self.tokens.split_first() {
+            self.tokens = rest;
+            Some(first)
+        } else {
+            None
+        }
+    }
+
+    pub fn remaining(&self) -> usize {
+        self.tokens.len()
+    }
+}
+
+macro_rules! assert_next_token {
+    ($ser:expr, $expected:ident) => {
+        assert_next_token!($ser, stringify!($expected), Token::$expected, true);
+    };
+    ($ser:expr, $expected:ident($v:expr)) => {
+        assert_next_token!(
+            $ser,
+            format_args!(concat!(stringify!($expected), "({:?})"), $v),
+            Token::$expected(v),
+            v == $v
+        );
+    };
+    ($ser:expr, $expected:ident { $($k:ident),* }) => {
+        let compare = ($($k,)*);
+        let field_format = || {
+            use std::fmt::Write;
+            let mut buffer = String::new();
+            $(
+                write!(&mut buffer, concat!(stringify!($k), ": {:?}, "), $k).unwrap();
+            )*
+            buffer
+        };
+        assert_next_token!(
+            $ser,
+            format_args!(concat!(stringify!($expected), " {{ {}}}"), field_format()),
+            Token::$expected { $($k),* },
+            ($($k,)*) == compare
+        );
+    };
+    ($ser:expr, $expected:expr, $pat:pat, $guard:expr) => {
+        match $ser.next_token() {
+            Some($pat) if $guard => {}
+            Some(other) => {
+                panic!("expected Token::{} but serialized as {}",
+                       $expected, other);
+            }
+            None => {
+                panic!("expected Token::{} after end of serialized tokens",
+                       $expected);
+            }
+        }
+    };
+}
+
+impl<'s, 'a> ser::Serializer for &'s mut Serializer<'a> {
+    type Ok = ();
+    type Error = Error;
+
+    type SerializeSeq = Self;
+    type SerializeTuple = Self;
+    type SerializeTupleStruct = Self;
+    type SerializeTupleVariant = Variant<'s, 'a>;
+    type SerializeMap = Self;
+    type SerializeStruct = Self;
+    type SerializeStructVariant = Variant<'s, 'a>;
+
+    fn serialize_bool(self, v: bool) -> Result<(), Error> {
+        assert_next_token!(self, Bool(v));
+        Ok(())
+    }
+
+    fn serialize_i8(self, v: i8) -> Result<(), Error> {
+        assert_next_token!(self, I8(v));
+        Ok(())
+    }
+
+    fn serialize_i16(self, v: i16) -> Result<(), Error> {
+        assert_next_token!(self, I16(v));
+        Ok(())
+    }
+
+    fn serialize_i32(self, v: i32) -> Result<(), Error> {
+        assert_next_token!(self, I32(v));
+        Ok(())
+    }
+
+    fn serialize_i64(self, v: i64) -> Result<(), Error> {
+        assert_next_token!(self, I64(v));
+        Ok(())
+    }
+
+    fn serialize_u8(self, v: u8) -> Result<(), Error> {
+        assert_next_token!(self, U8(v));
+        Ok(())
+    }
+
+    fn serialize_u16(self, v: u16) -> Result<(), Error> {
+        assert_next_token!(self, U16(v));
+        Ok(())
+    }
+
+    fn serialize_u32(self, v: u32) -> Result<(), Error> {
+        assert_next_token!(self, U32(v));
+        Ok(())
+    }
+
+    fn serialize_u64(self, v: u64) -> Result<(), Error> {
+        assert_next_token!(self, U64(v));
+        Ok(())
+    }
+
+    fn serialize_f32(self, v: f32) -> Result<(), Error> {
+        assert_next_token!(self, F32(v));
+        Ok(())
+    }
+
+    fn serialize_f64(self, v: f64) -> Result<(), Error> {
+        assert_next_token!(self, F64(v));
+        Ok(())
+    }
+
+    fn serialize_char(self, v: char) -> Result<(), Error> {
+        assert_next_token!(self, Char(v));
+        Ok(())
+    }
+
+    fn serialize_str(self, v: &str) -> Result<(), Error> {
+        match self.tokens.first() {
+            Some(&Token::BorrowedStr(_)) => assert_next_token!(self, BorrowedStr(v)),
+            Some(&Token::String(_)) => assert_next_token!(self, String(v)),
+            _ => assert_next_token!(self, Str(v)),
+        }
+        Ok(())
+    }
+
+    fn serialize_bytes(self, v: &[u8]) -> Result<(), Self::Error> {
+        match self.tokens.first() {
+            Some(&Token::BorrowedBytes(_)) => assert_next_token!(self, BorrowedBytes(v)),
+            Some(&Token::ByteBuf(_)) => assert_next_token!(self, ByteBuf(v)),
+            _ => assert_next_token!(self, Bytes(v)),
+        }
+        Ok(())
+    }
+
+    fn serialize_unit(self) -> Result<(), Error> {
+        assert_next_token!(self, Unit);
+        Ok(())
+    }
+
+    fn serialize_unit_struct(self, name: &'static str) -> Result<(), Error> {
+        assert_next_token!(self, UnitStruct { name });
+        Ok(())
+    }
+
+    fn serialize_unit_variant(
+        self,
+        name: &'static str,
+        _variant_index: u32,
+        variant: &'static str,
+    ) -> Result<(), Error> {
+        if self.tokens.first() == Some(&Token::Enum { name: name }) {
+            self.next_token();
+            assert_next_token!(self, Str(variant));
+            assert_next_token!(self, Unit);
+        } else {
+            assert_next_token!(self, UnitVariant { name, variant });
+        }
+        Ok(())
+    }
+
+    fn serialize_newtype_struct<T: ?Sized>(self, name: &'static str, value: &T) -> Result<(), Error>
+    where
+        T: Serialize,
+    {
+        assert_next_token!(self, NewtypeStruct { name });
+        value.serialize(self)
+    }
+
+    fn serialize_newtype_variant<T: ?Sized>(
+        self,
+        name: &'static str,
+        _variant_index: u32,
+        variant: &'static str,
+        value: &T,
+    ) -> Result<(), Error>
+    where
+        T: Serialize,
+    {
+        if self.tokens.first() == Some(&Token::Enum { name: name }) {
+            self.next_token();
+            assert_next_token!(self, Str(variant));
+        } else {
+            assert_next_token!(self, NewtypeVariant { name, variant });
+        }
+        value.serialize(self)
+    }
+
+    fn serialize_none(self) -> Result<(), Error> {
+        assert_next_token!(self, None);
+        Ok(())
+    }
+
+    fn serialize_some<T: ?Sized>(self, value: &T) -> Result<(), Error>
+    where
+        T: Serialize,
+    {
+        assert_next_token!(self, Some);
+        value.serialize(self)
+    }
+
+    fn serialize_seq(self, len: Option<usize>) -> Result<Self, Error> {
+        assert_next_token!(self, Seq { len });
+        Ok(self)
+    }
+
+    fn serialize_tuple(self, len: usize) -> Result<Self, Error> {
+        assert_next_token!(self, Tuple { len });
+        Ok(self)
+    }
+
+    fn serialize_tuple_struct(self, name: &'static str, len: usize) -> Result<Self, Error> {
+        assert_next_token!(self, TupleStruct { name, len });
+        Ok(self)
+    }
+
+    fn serialize_tuple_variant(
+        self,
+        name: &'static str,
+        _variant_index: u32,
+        variant: &'static str,
+        len: usize,
+    ) -> Result<Self::SerializeTupleVariant, Error> {
+        if self.tokens.first() == Some(&Token::Enum { name: name }) {
+            self.next_token();
+            assert_next_token!(self, Str(variant));
+            let len = Some(len);
+            assert_next_token!(self, Seq { len });
+            Ok(Variant {
+                ser: self,
+                end: Token::SeqEnd,
+            })
+        } else {
+            assert_next_token!(self, TupleVariant { name, variant, len });
+            Ok(Variant {
+                ser: self,
+                end: Token::TupleVariantEnd,
+            })
+        }
+    }
+
+    fn serialize_map(self, len: Option<usize>) -> Result<Self, Error> {
+        assert_next_token!(self, Map { len });
+        Ok(self)
+    }
+
+    fn serialize_struct(self, name: &'static str, len: usize) -> Result<Self, Error> {
+        assert_next_token!(self, Struct { name, len });
+        Ok(self)
+    }
+
+    fn serialize_struct_variant(
+        self,
+        name: &'static str,
+        _variant_index: u32,
+        variant: &'static str,
+        len: usize,
+    ) -> Result<Self::SerializeStructVariant, Error> {
+        if self.tokens.first() == Some(&Token::Enum { name: name }) {
+            self.next_token();
+            assert_next_token!(self, Str(variant));
+            let len = Some(len);
+            assert_next_token!(self, Map { len });
+            Ok(Variant {
+                ser: self,
+                end: Token::MapEnd,
+            })
+        } else {
+            assert_next_token!(self, StructVariant { name, variant, len });
+            Ok(Variant {
+                ser: self,
+                end: Token::StructVariantEnd,
+            })
+        }
+    }
+
+    fn is_human_readable(&self) -> bool {
+        panic!(
+            "Types which have different human-readable and compact representations \
+             must explicitly mark their test cases with `serde_test::Configure`"
+        );
+    }
+}
+
+pub struct Variant<'s, 'a: 's> {
+    ser: &'s mut Serializer<'a>,
+    end: Token,
+}
+
+impl<'s, 'a> ser::SerializeSeq for &'s mut Serializer<'a> {
+    type Ok = ();
+    type Error = Error;
+
+    fn serialize_element<T: ?Sized>(&mut self, value: &T) -> Result<(), Error>
+    where
+        T: Serialize,
+    {
+        value.serialize(&mut **self)
+    }
+
+    fn end(self) -> Result<(), Error> {
+        assert_next_token!(self, SeqEnd);
+        Ok(())
+    }
+}
+
+impl<'s, 'a> ser::SerializeTuple for &'s mut Serializer<'a> {
+    type Ok = ();
+    type Error = Error;
+
+    fn serialize_element<T: ?Sized>(&mut self, value: &T) -> Result<(), Error>
+    where
+        T: Serialize,
+    {
+        value.serialize(&mut **self)
+    }
+
+    fn end(self) -> Result<(), Error> {
+        assert_next_token!(self, TupleEnd);
+        Ok(())
+    }
+}
+
+impl<'s, 'a> ser::SerializeTupleStruct for &'s mut Serializer<'a> {
+    type Ok = ();
+    type Error = Error;
+
+    fn serialize_field<T: ?Sized>(&mut self, value: &T) -> Result<(), Error>
+    where
+        T: Serialize,
+    {
+        value.serialize(&mut **self)
+    }
+
+    fn end(self) -> Result<(), Error> {
+        assert_next_token!(self, TupleStructEnd);
+        Ok(())
+    }
+}
+
+impl<'s, 'a> ser::SerializeTupleVariant for Variant<'s, 'a> {
+    type Ok = ();
+    type Error = Error;
+
+    fn serialize_field<T: ?Sized>(&mut self, value: &T) -> Result<(), Error>
+    where
+        T: Serialize,
+    {
+        value.serialize(&mut *self.ser)
+    }
+
+    fn end(self) -> Result<(), Error> {
+        match self.end {
+            Token::TupleVariantEnd => assert_next_token!(self.ser, TupleVariantEnd),
+            Token::SeqEnd => assert_next_token!(self.ser, SeqEnd),
+            _ => unreachable!(),
+        }
+        Ok(())
+    }
+}
+
+impl<'s, 'a> ser::SerializeMap for &'s mut Serializer<'a> {
+    type Ok = ();
+    type Error = Error;
+
+    fn serialize_key<T: ?Sized>(&mut self, key: &T) -> Result<(), Self::Error>
+    where
+        T: Serialize,
+    {
+        key.serialize(&mut **self)
+    }
+
+    fn serialize_value<T: ?Sized>(&mut self, value: &T) -> Result<(), Self::Error>
+    where
+        T: Serialize,
+    {
+        value.serialize(&mut **self)
+    }
+
+    fn end(self) -> Result<(), Self::Error> {
+        assert_next_token!(self, MapEnd);
+        Ok(())
+    }
+}
+
+impl<'s, 'a> ser::SerializeStruct for &'s mut Serializer<'a> {
+    type Ok = ();
+    type Error = Error;
+
+    fn serialize_field<T: ?Sized>(
+        &mut self,
+        key: &'static str,
+        value: &T,
+    ) -> Result<(), Self::Error>
+    where
+        T: Serialize,
+    {
+        key.serialize(&mut **self)?;
+        value.serialize(&mut **self)
+    }
+
+    fn end(self) -> Result<(), Self::Error> {
+        assert_next_token!(self, StructEnd);
+        Ok(())
+    }
+}
+
+impl<'s, 'a> ser::SerializeStructVariant for Variant<'s, 'a> {
+    type Ok = ();
+    type Error = Error;
+
+    fn serialize_field<T: ?Sized>(
+        &mut self,
+        key: &'static str,
+        value: &T,
+    ) -> Result<(), Self::Error>
+    where
+        T: Serialize,
+    {
+        key.serialize(&mut *self.ser)?;
+        value.serialize(&mut *self.ser)
+    }
+
+    fn end(self) -> Result<(), Self::Error> {
+        match self.end {
+            Token::StructVariantEnd => assert_next_token!(self.ser, StructVariantEnd),
+            Token::MapEnd => assert_next_token!(self.ser, MapEnd),
+            _ => unreachable!(),
+        }
+        Ok(())
+    }
+}

serde_test/src/token.rs

@@ -0,0 +1,519 @@
+use std::fmt::{self, Debug, Display};
+
+#[derive(Copy, Clone, PartialEq, Debug)]
+pub enum Token {
+    /// A serialized `bool`.
+    ///
+    /// ```edition2018
+    /// # use serde_test::{assert_tokens, Token};
+    /// #
+    /// assert_tokens(&true, &[Token::Bool(true)]);
+    /// ```
+    Bool(bool),
+
+    /// A serialized `i8`.
+    ///
+    /// ```edition2018
+    /// # use serde_test::{assert_tokens, Token};
+    /// #
+    /// assert_tokens(&0i8, &[Token::I8(0)]);
+    /// ```
+    I8(i8),
+
+    /// A serialized `i16`.
+    ///
+    /// ```edition2018
+    /// # use serde_test::{assert_tokens, Token};
+    /// #
+    /// assert_tokens(&0i16, &[Token::I16(0)]);
+    /// ```
+    I16(i16),
+
+    /// A serialized `i32`.
+    ///
+    /// ```edition2018
+    /// # use serde_test::{assert_tokens, Token};
+    /// #
+    /// assert_tokens(&0i32, &[Token::I32(0)]);
+    /// ```
+    I32(i32),
+
+    /// A serialized `i64`.
+    ///
+    /// ```edition2018
+    /// # use serde_test::{assert_tokens, Token};
+    /// #
+    /// assert_tokens(&0i64, &[Token::I64(0)]);
+    /// ```
+    I64(i64),
+
+    /// A serialized `u8`.
+    ///
+    /// ```edition2018
+    /// # use serde_test::{assert_tokens, Token};
+    /// #
+    /// assert_tokens(&0u8, &[Token::U8(0)]);
+    /// ```
+    U8(u8),
+
+    /// A serialized `u16`.
+    ///
+    /// ```edition2018
+    /// # use serde_test::{assert_tokens, Token};
+    /// #
+    /// assert_tokens(&0u16, &[Token::U16(0)]);
+    /// ```
+    U16(u16),
+
+    /// A serialized `u32`.
+    ///
+    /// ```edition2018
+    /// # use serde_test::{assert_tokens, Token};
+    /// #
+    /// assert_tokens(&0u32, &[Token::U32(0)]);
+    /// ```
+    U32(u32),
+
+    /// A serialized `u64`.
+    ///
+    /// ```edition2018
+    /// # use serde_test::{assert_tokens, Token};
+    /// #
+    /// assert_tokens(&0u64, &[Token::U64(0)]);
+    /// ```
+    U64(u64),
+
+    /// A serialized `f32`.
+    ///
+    /// ```edition2018
+    /// # use serde_test::{assert_tokens, Token};
+    /// #
+    /// assert_tokens(&0f32, &[Token::F32(0.0)]);
+    /// ```
+    F32(f32),
+
+    /// A serialized `f64`.
+    ///
+    /// ```edition2018
+    /// # use serde_test::{assert_tokens, Token};
+    /// #
+    /// assert_tokens(&0f64, &[Token::F64(0.0)]);
+    /// ```
+    F64(f64),
+
+    /// A serialized `char`.
+    ///
+    /// ```edition2018
+    /// # use serde_test::{assert_tokens, Token};
+    /// #
+    /// assert_tokens(&'\n', &[Token::Char('\n')]);
+    /// ```
+    Char(char),
+
+    /// A serialized `str`.
+    ///
+    /// ```edition2018
+    /// # use serde_test::{assert_tokens, Token};
+    /// #
+    /// let s = String::from("transient");
+    /// assert_tokens(&s, &[Token::Str("transient")]);
+    /// ```
+    Str(&'static str),
+
+    /// A borrowed `str`.
+    ///
+    /// ```edition2018
+    /// # use serde_test::{assert_tokens, Token};
+    /// #
+    /// let s: &str = "borrowed";
+    /// assert_tokens(&s, &[Token::BorrowedStr("borrowed")]);
+    /// ```
+    BorrowedStr(&'static str),
+
+    /// A serialized `String`.
+    ///
+    /// ```edition2018
+    /// # use serde_test::{assert_tokens, Token};
+    /// #
+    /// let s = String::from("owned");
+    /// assert_tokens(&s, &[Token::String("owned")]);
+    /// ```
+    String(&'static str),
+
+    /// A serialized `[u8]`
+    Bytes(&'static [u8]),
+
+    /// A borrowed `[u8]`.
+    BorrowedBytes(&'static [u8]),
+
+    /// A serialized `ByteBuf`
+    ByteBuf(&'static [u8]),
+
+    /// A serialized `Option<T>` containing none.
+    ///
+    /// ```edition2018
+    /// # use serde_test::{assert_tokens, Token};
+    /// #
+    /// let opt = None::<char>;
+    /// assert_tokens(&opt, &[Token::None]);
+    /// ```
+    None,
+
+    /// The header to a serialized `Option<T>` containing some value.
+    ///
+    /// The tokens of the value follow after this header.
+    ///
+    /// ```edition2018
+    /// # use serde_test::{assert_tokens, Token};
+    /// #
+    /// let opt = Some('c');
+    /// assert_tokens(&opt, &[
+    ///     Token::Some,
+    ///     Token::Char('c'),
+    /// ]);
+    /// ```
+    Some,
+
+    /// A serialized `()`.
+    ///
+    /// ```edition2018
+    /// # use serde_test::{assert_tokens, Token};
+    /// #
+    /// assert_tokens(&(), &[Token::Unit]);
+    /// ```
+    Unit,
+
+    /// A serialized unit struct of the given name.
+    ///
+    /// ```edition2018
+    /// # use serde::{Serialize, Deserialize};
+    /// # use serde_test::{assert_tokens, Token};
+    /// #
+    /// # fn main() {
+    /// #[derive(Serialize, Deserialize, PartialEq, Debug)]
+    /// struct X;
+    ///
+    /// assert_tokens(&X, &[Token::UnitStruct { name: "X" }]);
+    /// # }
+    /// ```
+    UnitStruct { name: &'static str },
+
+    /// A unit variant of an enum.
+    ///
+    /// ```edition2018
+    /// # use serde::{Serialize, Deserialize};
+    /// # use serde_test::{assert_tokens, Token};
+    /// #
+    /// # fn main() {
+    /// #[derive(Serialize, Deserialize, PartialEq, Debug)]
+    /// enum E {
+    ///     A,
+    /// }
+    ///
+    /// let a = E::A;
+    /// assert_tokens(&a, &[Token::UnitVariant { name: "E", variant: "A" }]);
+    /// # }
+    /// ```
+    UnitVariant {
+        name: &'static str,
+        variant: &'static str,
+    },
+
+    /// The header to a serialized newtype struct of the given name.
+    ///
+    /// After this header is the value contained in the newtype struct.
+    ///
+    /// ```edition2018
+    /// # use serde::{Serialize, Deserialize};
+    /// # use serde_test::{assert_tokens, Token};
+    /// #
+    /// # fn main() {
+    /// #[derive(Serialize, Deserialize, PartialEq, Debug)]
+    /// struct N(String);
+    ///
+    /// let n = N("newtype".to_owned());
+    /// assert_tokens(&n, &[
+    ///     Token::NewtypeStruct { name: "N" },
+    ///     Token::String("newtype"),
+    /// ]);
+    /// # }
+    /// ```
+    NewtypeStruct { name: &'static str },
+
+    /// The header to a newtype variant of an enum.
+    ///
+    /// After this header is the value contained in the newtype variant.
+    ///
+    /// ```edition2018
+    /// # use serde::{Serialize, Deserialize};
+    /// # use serde_test::{assert_tokens, Token};
+    /// #
+    /// # fn main() {
+    /// #[derive(Serialize, Deserialize, PartialEq, Debug)]
+    /// enum E {
+    ///     B(u8),
+    /// }
+    ///
+    /// let b = E::B(0);
+    /// assert_tokens(&b, &[
+    ///     Token::NewtypeVariant { name: "E", variant: "B" },
+    ///     Token::U8(0),
+    /// ]);
+    /// # }
+    /// ```
+    NewtypeVariant {
+        name: &'static str,
+        variant: &'static str,
+    },
+
+    /// The header to a sequence.
+    ///
+    /// After this header are the elements of the sequence, followed by
+    /// `SeqEnd`.
+    ///
+    /// ```edition2018
+    /// # use serde_test::{assert_tokens, Token};
+    /// #
+    /// let vec = vec!['a', 'b', 'c'];
+    /// assert_tokens(&vec, &[
+    ///     Token::Seq { len: Some(3) },
+    ///     Token::Char('a'),
+    ///     Token::Char('b'),
+    ///     Token::Char('c'),
+    ///     Token::SeqEnd,
+    /// ]);
+    /// ```
+    Seq { len: Option<usize> },
+
+    /// An indicator of the end of a sequence.
+    SeqEnd,
+
+    /// The header to a tuple.
+    ///
+    /// After this header are the elements of the tuple, followed by `TupleEnd`.
+    ///
+    /// ```edition2018
+    /// # use serde_test::{assert_tokens, Token};
+    /// #
+    /// let tuple = ('a', 100);
+    /// assert_tokens(&tuple, &[
+    ///     Token::Tuple { len: 2 },
+    ///     Token::Char('a'),
+    ///     Token::I32(100),
+    ///     Token::TupleEnd,
+    /// ]);
+    /// ```
+    Tuple { len: usize },
+
+    /// An indicator of the end of a tuple.
+    TupleEnd,
+
+    /// The header to a tuple struct.
+    ///
+    /// After this header are the fields of the tuple struct, followed by
+    /// `TupleStructEnd`.
+    ///
+    /// ```edition2018
+    /// # use serde::{Serialize, Deserialize};
+    /// # use serde_test::{assert_tokens, Token};
+    /// #
+    /// # fn main() {
+    /// #[derive(Serialize, Deserialize, PartialEq, Debug)]
+    /// struct T(u8, u8);
+    ///
+    /// let t = T(0, 0);
+    /// assert_tokens(&t, &[
+    ///     Token::TupleStruct { name: "T", len: 2 },
+    ///     Token::U8(0),
+    ///     Token::U8(0),
+    ///     Token::TupleStructEnd,
+    /// ]);
+    /// # }
+    /// ```
+    TupleStruct { name: &'static str, len: usize },
+
+    /// An indicator of the end of a tuple struct.
+    TupleStructEnd,
+
+    /// The header to a tuple variant of an enum.
+    ///
+    /// After this header are the fields of the tuple variant, followed by
+    /// `TupleVariantEnd`.
+    ///
+    /// ```edition2018
+    /// # use serde::{Serialize, Deserialize};
+    /// # use serde_test::{assert_tokens, Token};
+    /// #
+    /// # fn main() {
+    /// #[derive(Serialize, Deserialize, PartialEq, Debug)]
+    /// enum E {
+    ///     C(u8, u8),
+    /// }
+    ///
+    /// let c = E::C(0, 0);
+    /// assert_tokens(&c, &[
+    ///     Token::TupleVariant { name: "E", variant: "C", len: 2 },
+    ///     Token::U8(0),
+    ///     Token::U8(0),
+    ///     Token::TupleVariantEnd,
+    /// ]);
+    /// # }
+    /// ```
+    TupleVariant {
+        name: &'static str,
+        variant: &'static str,
+        len: usize,
+    },
+
+    /// An indicator of the end of a tuple variant.
+    TupleVariantEnd,
+
+    /// The header to a map.
+    ///
+    /// After this header are the entries of the map, followed by `MapEnd`.
+    ///
+    /// ```edition2018
+    /// # use serde_test::{assert_tokens, Token};
+    /// #
+    /// use std::collections::BTreeMap;
+    ///
+    /// let mut map = BTreeMap::new();
+    /// map.insert('A', 65);
+    /// map.insert('Z', 90);
+    ///
+    /// assert_tokens(&map, &[
+    ///     Token::Map { len: Some(2) },
+    ///     Token::Char('A'),
+    ///     Token::I32(65),
+    ///     Token::Char('Z'),
+    ///     Token::I32(90),
+    ///     Token::MapEnd,
+    /// ]);
+    /// ```
+    Map { len: Option<usize> },
+
+    /// An indicator of the end of a map.
+    MapEnd,
+
+    /// The header of a struct.
+    ///
+    /// After this header are the fields of the struct, followed by `StructEnd`.
+    ///
+    /// ```edition2018
+    /// # use serde::{Serialize, Deserialize};
+    /// # use serde_test::{assert_tokens, Token};
+    /// #
+    /// # fn main() {
+    /// #[derive(Serialize, Deserialize, PartialEq, Debug)]
+    /// struct S {
+    ///     a: u8,
+    ///     b: u8,
+    /// }
+    ///
+    /// let s = S { a: 0, b: 0 };
+    /// assert_tokens(&s, &[
+    ///     Token::Struct { name: "S", len: 2 },
+    ///     Token::Str("a"),
+    ///     Token::U8(0),
+    ///     Token::Str("b"),
+    ///     Token::U8(0),
+    ///     Token::StructEnd,
+    /// ]);
+    /// # }
+    /// ```
+    Struct { name: &'static str, len: usize },
+
+    /// An indicator of the end of a struct.
+    StructEnd,
+
+    /// The header of a struct variant of an enum.
+    ///
+    /// After this header are the fields of the struct variant, followed by
+    /// `StructVariantEnd`.
+    ///
+    /// ```edition2018
+    /// # use serde::{Serialize, Deserialize};
+    /// # use serde_test::{assert_tokens, Token};
+    /// #
+    /// # fn main() {
+    /// #[derive(Serialize, Deserialize, PartialEq, Debug)]
+    /// enum E {
+    ///     D { d: u8 },
+    /// }
+    ///
+    /// let d = E::D { d: 0 };
+    /// assert_tokens(&d, &[
+    ///     Token::StructVariant { name: "E", variant: "D", len: 1 },
+    ///     Token::Str("d"),
+    ///     Token::U8(0),
+    ///     Token::StructVariantEnd,
+    /// ]);
+    /// # }
+    /// ```
+    StructVariant {
+        name: &'static str,
+        variant: &'static str,
+        len: usize,
+    },
+
+    /// An indicator of the end of a struct variant.
+    StructVariantEnd,
+
+    /// The header to an enum of the given name.
+    ///
+    /// ```edition2018
+    /// # use serde::{Serialize, Deserialize};
+    /// # use serde_test::{assert_tokens, Token};
+    /// #
+    /// # fn main() {
+    /// #[derive(Serialize, Deserialize, PartialEq, Debug)]
+    /// enum E {
+    ///     A,
+    ///     B(u8),
+    ///     C(u8, u8),
+    ///     D { d: u8 },
+    /// }
+    ///
+    /// let a = E::A;
+    /// assert_tokens(&a, &[
+    ///     Token::Enum { name: "E" },
+    ///     Token::Str("A"),
+    ///     Token::Unit,
+    /// ]);
+    ///
+    /// let b = E::B(0);
+    /// assert_tokens(&b, &[
+    ///     Token::Enum { name: "E" },
+    ///     Token::Str("B"),
+    ///     Token::U8(0),
+    /// ]);
+    ///
+    /// let c = E::C(0, 0);
+    /// assert_tokens(&c, &[
+    ///     Token::Enum { name: "E" },
+    ///     Token::Str("C"),
+    ///     Token::Seq { len: Some(2) },
+    ///     Token::U8(0),
+    ///     Token::U8(0),
+    ///     Token::SeqEnd,
+    /// ]);
+    ///
+    /// let d = E::D { d: 0 };
+    /// assert_tokens(&d, &[
+    ///     Token::Enum { name: "E" },
+    ///     Token::Str("D"),
+    ///     Token::Map { len: Some(1) },
+    ///     Token::Str("d"),
+    ///     Token::U8(0),
+    ///     Token::MapEnd,
+    /// ]);
+    /// # }
+    /// ```
+    Enum { name: &'static str },
+}
+
+impl Display for Token {
+    fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+        Debug::fmt(self, formatter)
+    }
+}

src/bytes.rs

@@ -1,174 +0,0 @@
-//! Helper module to enable serializing bytes more efficiently
-
-use std::ops;
-
-use ser;
-use de;
-
-///////////////////////////////////////////////////////////////////////////////
-
-/// `Bytes` wraps a `&[u8]` in order to serialize into a byte array.
-pub struct Bytes<'a> {
-    bytes: &'a [u8],
-}
-
-impl<'a> From<&'a [u8]> for Bytes<'a> {
-    fn from(bytes: &'a [u8]) -> Self {
-        Bytes {
-            bytes: bytes,
-        }
-    }
-}
-
-impl<'a> From<&'a Vec<u8>> for Bytes<'a> {
-    fn from(bytes: &'a Vec<u8>) -> Self {
-        Bytes {
-            bytes: &bytes,
-        }
-    }
-}
-
-impl<'a> ops::Deref for Bytes<'a> {
-    type Target = [u8];
-
-    fn deref(&self) -> &[u8] { self.bytes }
-}
-
-impl<'a> ser::Serialize for Bytes<'a> {
-    #[inline]
-    fn serialize<S>(&self, serializer: &mut S) -> Result<(), S::Error>
-        where S: ser::Serializer
-    {
-        serializer.visit_bytes(self.bytes)
-    }
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-/// `ByteBuf` wraps a `Vec<u8>` in order to hook into serialize and from deserialize a byte array.
-#[derive(Clone, Debug, Eq, Hash, PartialEq, PartialOrd, Ord)]
-pub struct ByteBuf {
-    bytes: Vec<u8>,
-}
-
-impl ByteBuf {
-    pub fn new() -> Self {
-        ByteBuf {
-            bytes: Vec::new(),
-        }
-    }
-
-    pub fn with_capacity(cap: usize) -> Self {
-        ByteBuf {
-            bytes: Vec::with_capacity(cap)
-        }
-    }
-}
-
-impl<T> From<T> for ByteBuf where T: Into<Vec<u8>> {
-    fn from(bytes: T) -> Self {
-        ByteBuf {
-            bytes: bytes.into(),
-        }
-    }
-}
-
-impl AsRef<Vec<u8>> for ByteBuf {
-    fn as_ref(&self) -> &Vec<u8> {
-        &self.bytes
-    }
-}
-
-impl AsRef<[u8]> for ByteBuf {
-    fn as_ref(&self) -> &[u8] {
-        &self.bytes
-    }
-}
-
-impl AsMut<Vec<u8>> for ByteBuf {
-    fn as_mut(&mut self) -> &mut Vec<u8> {
-        &mut self.bytes
-    }
-}
-
-impl AsMut<[u8]> for ByteBuf {
-    fn as_mut(&mut self) -> &mut [u8] {
-        &mut self.bytes
-    }
-}
-
-impl ops::Deref for ByteBuf {
-    type Target = [u8];
-
-    fn deref(&self) -> &[u8] { &self.bytes[..] }
-}
-
-impl ops::DerefMut for ByteBuf {
-    fn deref_mut(&mut self) -> &mut [u8] { &mut self.bytes[..] }
-}
-
-impl ser::Serialize for ByteBuf {
-    fn serialize<S>(&self, serializer: &mut S) -> Result<(), S::Error>
-        where S: ser::Serializer
-    {
-        serializer.visit_bytes(&self)
-    }
-}
-
-pub struct ByteBufVisitor;
-
-impl de::Visitor for ByteBufVisitor {
-    type Value = ByteBuf;
-
-    #[inline]
-    fn visit_unit<E>(&mut self) -> Result<ByteBuf, E>
-        where E: de::Error,
-    {
-        Ok(ByteBuf {
-            bytes: Vec::new(),
-        })
-    }
-
-    #[inline]
-    fn visit_seq<V>(&mut self, mut visitor: V) -> Result<ByteBuf, V::Error>
-        where V: de::SeqVisitor,
-    {
-        let (len, _) = visitor.size_hint();
-        let mut values = Vec::with_capacity(len);
-
-        while let Some(value) = try!(visitor.visit()) {
-            values.push(value);
-        }
-
-        try!(visitor.end());
-
-        Ok(ByteBuf {
-            bytes: values,
-        })
-    }
-
-    #[inline]
-    fn visit_bytes<E>(&mut self, v: &[u8]) -> Result<ByteBuf, E>
-        where E: de::Error,
-    {
-        self.visit_byte_buf(v.to_vec())
-    }
-
-    #[inline]
-    fn visit_byte_buf<E>(&mut self, v: Vec<u8>) -> Result<ByteBuf, E>
-        where E: de::Error,
-    {
-        Ok(ByteBuf {
-            bytes: v,
-        })
-    }
-}
-
-impl de::Deserialize for ByteBuf {
-    #[inline]
-    fn deserialize<D>(deserializer: &mut D) -> Result<ByteBuf, D::Error>
-        where D: de::Deserializer
-    {
-        deserializer.visit_bytes(ByteBufVisitor)
-    }
-}

src/de/impls.rs

@@ -1,686 +0,0 @@
-use std::collections::{BTreeMap, BTreeSet, HashMap, HashSet};
-use std::hash::Hash;
-use std::marker::PhantomData;
-use std::path;
-use std::rc::Rc;
-use std::sync::Arc;
-
-use num::FromPrimitive;
-
-use de::{
-    Deserialize,
-    Deserializer,
-    Error,
-    MapVisitor,
-    SeqVisitor,
-    Visitor,
-};
-
-///////////////////////////////////////////////////////////////////////////////
-
-pub struct UnitVisitor;
-
-impl Visitor for UnitVisitor {
-    type Value = ();
-
-    fn visit_unit<E>(&mut self) -> Result<(), E>
-        where E: Error,
-    {
-        Ok(())
-    }
-
-    fn visit_seq<V>(&mut self, mut visitor: V) -> Result<(), V::Error>
-        where V: SeqVisitor,
-    {
-        visitor.end()
-    }
-}
-
-impl Deserialize for () {
-    fn deserialize<D>(deserializer: &mut D) -> Result<(), D::Error>
-        where D: Deserializer,
-    {
-        deserializer.visit(UnitVisitor)
-    }
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-struct BoolVisitor;
-
-impl Visitor for BoolVisitor {
-    type Value = bool;
-
-    fn visit_bool<E>(&mut self, v: bool) -> Result<bool, E>
-        where E: Error,
-    {
-        Ok(v)
-    }
-}
-
-impl Deserialize for bool {
-    fn deserialize<D>(deserializer: &mut D) -> Result<bool, D::Error>
-        where D: Deserializer,
-    {
-        deserializer.visit(BoolVisitor)
-    }
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-macro_rules! impl_deserialize_num_method {
-    ($src_ty:ty, $method:ident, $from_method:ident) => {
-        #[inline]
-        fn $method<E>(&mut self, v: $src_ty) -> Result<T, E>
-            where E: Error,
-        {
-            match FromPrimitive::$from_method(v) {
-                Some(v) => Ok(v),
-                None => Err(Error::syntax_error()),
-            }
-        }
-    }
-}
-
-pub struct PrimitiveVisitor<T> {
-    marker: PhantomData<T>,
-}
-
-impl<T> PrimitiveVisitor<T> {
-    #[inline]
-    pub fn new() -> Self {
-        PrimitiveVisitor {
-            marker: PhantomData,
-        }
-    }
-}
-
-impl<
-    T: Deserialize + FromPrimitive
-> Visitor for PrimitiveVisitor<T> {
-    type Value = T;
-
-    impl_deserialize_num_method!(isize, visit_isize, from_isize);
-    impl_deserialize_num_method!(i8, visit_i8, from_i8);
-    impl_deserialize_num_method!(i16, visit_i16, from_i16);
-    impl_deserialize_num_method!(i32, visit_i32, from_i32);
-    impl_deserialize_num_method!(i64, visit_i64, from_i64);
-    impl_deserialize_num_method!(usize, visit_usize, from_usize);
-    impl_deserialize_num_method!(u8, visit_u8, from_u8);
-    impl_deserialize_num_method!(u16, visit_u16, from_u16);
-    impl_deserialize_num_method!(u32, visit_u32, from_u32);
-    impl_deserialize_num_method!(u64, visit_u64, from_u64);
-    impl_deserialize_num_method!(f32, visit_f32, from_f32);
-    impl_deserialize_num_method!(f64, visit_f64, from_f64);
-}
-
-macro_rules! impl_deserialize_num {
-    ($ty:ty) => {
-        impl Deserialize for $ty {
-            #[inline]
-            fn deserialize<D>(deserializer: &mut D) -> Result<$ty, D::Error>
-                where D: Deserializer,
-            {
-                deserializer.visit(PrimitiveVisitor::new())
-            }
-        }
-    }
-}
-
-impl_deserialize_num!(isize);
-impl_deserialize_num!(i8);
-impl_deserialize_num!(i16);
-impl_deserialize_num!(i32);
-impl_deserialize_num!(i64);
-impl_deserialize_num!(usize);
-impl_deserialize_num!(u8);
-impl_deserialize_num!(u16);
-impl_deserialize_num!(u32);
-impl_deserialize_num!(u64);
-impl_deserialize_num!(f32);
-impl_deserialize_num!(f64);
-
-///////////////////////////////////////////////////////////////////////////////
-
-struct CharVisitor;
-
-impl Visitor for CharVisitor {
-    type Value = char;
-
-    #[inline]
-    fn visit_char<E>(&mut self, v: char) -> Result<char, E>
-        where E: Error,
-    {
-        Ok(v)
-    }
-
-    #[inline]
-    fn visit_str<E>(&mut self, v: &str) -> Result<char, E>
-        where E: Error,
-    {
-        let mut iter = v.chars();
-        if let Some(v) = iter.next() {
-            if iter.next().is_some() {
-                Err(Error::syntax_error())
-            } else {
-                Ok(v)
-            }
-        } else {
-            Err(Error::end_of_stream_error())
-        }
-    }
-}
-
-impl Deserialize for char {
-    #[inline]
-    fn deserialize<D>(deserializer: &mut D) -> Result<char, D::Error>
-        where D: Deserializer,
-    {
-        deserializer.visit(CharVisitor)
-    }
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-struct StringVisitor;
-
-impl Visitor for StringVisitor {
-    type Value = String;
-
-    fn visit_str<E>(&mut self, v: &str) -> Result<String, E>
-        where E: Error,
-    {
-        Ok(v.to_string())
-    }
-
-    fn visit_string<E>(&mut self, v: String) -> Result<String, E>
-        where E: Error,
-    {
-        Ok(v)
-    }
-}
-
-impl Deserialize for String {
-    fn deserialize<D>(deserializer: &mut D) -> Result<String, D::Error>
-        where D: Deserializer,
-    {
-        deserializer.visit(StringVisitor)
-    }
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-struct OptionVisitor<T> {
-    marker: PhantomData<T>,
-}
-
-impl<
-    T: Deserialize,
-> Visitor for OptionVisitor<T> {
-    type Value = Option<T>;
-
-    #[inline]
-    fn visit_none<E>(&mut self) -> Result<Option<T>, E>
-        where E: Error,
-    {
-        Ok(None)
-    }
-
-    #[inline]
-    fn visit_some<D>(&mut self, deserializer: &mut D) -> Result<Option<T>, D::Error>
-        where D: Deserializer,
-    {
-        Ok(Some(try!(Deserialize::deserialize(deserializer))))
-    }
-}
-
-impl<T> Deserialize for Option<T> where T: Deserialize {
-    fn deserialize<D>(deserializer: &mut D) -> Result<Option<T>, D::Error>
-        where D: Deserializer,
-    {
-        deserializer.visit_option(OptionVisitor { marker: PhantomData })
-    }
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-pub struct BTreeSetVisitor<T> {
-    marker: PhantomData<T>,
-}
-
-impl<T> BTreeSetVisitor<T> {
-    pub fn new() -> Self {
-        BTreeSetVisitor {
-            marker: PhantomData,
-        }
-    }
-}
-
-impl<T> Visitor for BTreeSetVisitor<T>
-    where T: Deserialize + Eq + Ord,
-{
-    type Value = BTreeSet<T>;
-
-    #[inline]
-    fn visit_unit<E>(&mut self) -> Result<BTreeSet<T>, E>
-        where E: Error,
-    {
-        Ok(BTreeSet::new())
-    }
-
-    #[inline]
-    fn visit_seq<V>(&mut self, mut visitor: V) -> Result<BTreeSet<T>, V::Error>
-        where V: SeqVisitor,
-    {
-        let mut values = BTreeSet::new();
-
-        while let Some(value) = try!(visitor.visit()) {
-            values.insert(value);
-        }
-
-        try!(visitor.end());
-
-        Ok(values)
-    }
-}
-
-impl<T> Deserialize for BTreeSet<T>
-    where T: Deserialize + Eq + Ord,
-{
-    fn deserialize<D>(deserializer: &mut D) -> Result<BTreeSet<T>, D::Error>
-        where D: Deserializer,
-    {
-        deserializer.visit(BTreeSetVisitor::new())
-    }
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-pub struct HashSetVisitor<T> {
-    marker: PhantomData<T>,
-}
-
-impl<T> HashSetVisitor<T> {
-    pub fn new() -> Self {
-        HashSetVisitor {
-            marker: PhantomData,
-        }
-    }
-}
-
-impl<T> Visitor for HashSetVisitor<T>
-    where T: Deserialize + Eq + Hash,
-{
-    type Value = HashSet<T>;
-
-    #[inline]
-    fn visit_unit<E>(&mut self) -> Result<HashSet<T>, E>
-        where E: Error,
-    {
-        Ok(HashSet::new())
-    }
-
-    #[inline]
-    fn visit_seq<V>(&mut self, mut visitor: V) -> Result<HashSet<T>, V::Error>
-        where V: SeqVisitor,
-    {
-        let (len, _) = visitor.size_hint();
-        let mut values = HashSet::with_capacity(len);
-
-        while let Some(value) = try!(visitor.visit()) {
-            values.insert(value);
-        }
-
-        try!(visitor.end());
-
-        Ok(values)
-    }
-}
-
-impl<T> Deserialize for HashSet<T>
-    where T: Deserialize + Eq + Hash,
-{
-    fn deserialize<D>(deserializer: &mut D) -> Result<HashSet<T>, D::Error>
-        where D: Deserializer,
-    {
-        deserializer.visit(HashSetVisitor::new())
-    }
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-pub struct VecVisitor<T> {
-    marker: PhantomData<T>,
-}
-
-impl<T> VecVisitor<T> {
-    pub fn new() -> Self {
-        VecVisitor {
-            marker: PhantomData,
-        }
-    }
-}
-
-impl<T> Visitor for VecVisitor<T> where T: Deserialize {
-    type Value = Vec<T>;
-
-    #[inline]
-    fn visit_unit<E>(&mut self) -> Result<Vec<T>, E>
-        where E: Error,
-    {
-        Ok(Vec::new())
-    }
-
-    #[inline]
-    fn visit_seq<V>(&mut self, mut visitor: V) -> Result<Vec<T>, V::Error>
-        where V: SeqVisitor,
-    {
-        let (len, _) = visitor.size_hint();
-        let mut values = Vec::with_capacity(len);
-
-        while let Some(value) = try!(visitor.visit()) {
-            values.push(value);
-        }
-
-        try!(visitor.end());
-
-        Ok(values)
-    }
-}
-
-impl<T> Deserialize for Vec<T>
-    where T: Deserialize,
-{
-    fn deserialize<D>(deserializer: &mut D) -> Result<Vec<T>, D::Error>
-        where D: Deserializer,
-    {
-        deserializer.visit(VecVisitor::new())
-    }
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-macro_rules! tuple_impls {
-    () => {};
-    ($($visitor:ident => ($($name:ident),+),)+) => {
-        $(
-            struct $visitor<$($name,)+> {
-                marker: PhantomData<($($name,)+)>,
-            }
-
-            impl<
-                $($name: Deserialize,)+
-            > Visitor for $visitor<$($name,)+> {
-                type Value = ($($name,)+);
-
-                #[inline]
-                #[allow(non_snake_case)]
-                fn visit_seq<V>(&mut self, mut visitor: V) -> Result<($($name,)+), V::Error>
-                    where V: SeqVisitor,
-                {
-                    $(
-                        let $name = match try!(visitor.visit()) {
-                            Some(value) => value,
-                            None => { return Err(Error::end_of_stream_error()); }
-                        };
-                     )+;
-
-                    try!(visitor.end());
-
-                    Ok(($($name,)+))
-                }
-            }
-
-            impl<
-                $($name: Deserialize),+
-            > Deserialize for ($($name,)+) {
-                #[inline]
-                fn deserialize<D>(deserializer: &mut D) -> Result<($($name,)+), D::Error>
-                    where D: Deserializer,
-                {
-                    deserializer.visit($visitor { marker: PhantomData })
-                }
-            }
-        )+
-    }
-}
-
-tuple_impls! {
-    TupleVisitor1 => (T0),
-    TupleVisitor2 => (T0, T1),
-    TupleVisitor3 => (T0, T1, T2),
-    TupleVisitor4 => (T0, T1, T2, T3),
-    TupleVisitor5 => (T0, T1, T2, T3, T4),
-    TupleVisitor6 => (T0, T1, T2, T3, T4, T5),
-    TupleVisitor7 => (T0, T1, T2, T3, T4, T5, T6),
-    TupleVisitor8 => (T0, T1, T2, T3, T4, T5, T6, T7),
-    TupleVisitor9 => (T0, T1, T2, T3, T4, T5, T6, T7, T8),
-    TupleVisitor10 => (T0, T1, T2, T3, T4, T5, T6, T7, T8, T9),
-    TupleVisitor11 => (T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10),
-    TupleVisitor12 => (T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11),
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-pub struct BTreeMapVisitor<K, V> {
-    marker: PhantomData<BTreeMap<K, V>>,
-}
-
-impl<K, V> BTreeMapVisitor<K, V> {
-    #[inline]
-    pub fn new() -> Self {
-        BTreeMapVisitor {
-            marker: PhantomData,
-        }
-    }
-}
-
-impl<K, V> Visitor for BTreeMapVisitor<K, V>
-    where K: Deserialize + Ord,
-          V: Deserialize
-{
-    type Value = BTreeMap<K, V>;
-
-    #[inline]
-    fn visit_unit<E>(&mut self) -> Result<BTreeMap<K, V>, E>
-        where E: Error,
-    {
-        Ok(BTreeMap::new())
-    }
-
-    #[inline]
-    fn visit_map<Visitor>(&mut self, mut visitor: Visitor) -> Result<BTreeMap<K, V>, Visitor::Error>
-        where Visitor: MapVisitor,
-    {
-        let mut values = BTreeMap::new();
-
-        while let Some((key, value)) = try!(visitor.visit()) {
-            values.insert(key, value);
-        }
-
-        try!(visitor.end());
-
-        Ok(values)
-    }
-}
-
-impl<K, V> Deserialize for BTreeMap<K, V>
-    where K: Deserialize + Eq + Ord,
-          V: Deserialize,
-{
-    fn deserialize<D>(deserializer: &mut D) -> Result<BTreeMap<K, V>, D::Error>
-        where D: Deserializer,
-    {
-        deserializer.visit(BTreeMapVisitor::new())
-    }
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-pub struct HashMapVisitor<K, V> {
-    marker: PhantomData<HashMap<K, V>>,
-}
-
-impl<K, V> HashMapVisitor<K, V> {
-    #[inline]
-    pub fn new() -> Self {
-        HashMapVisitor {
-            marker: PhantomData,
-        }
-    }
-}
-
-impl<K, V> Visitor for HashMapVisitor<K, V>
-    where K: Deserialize + Eq + Hash,
-          V: Deserialize,
-{
-    type Value = HashMap<K, V>;
-
-    #[inline]
-    fn visit_unit<E>(&mut self) -> Result<HashMap<K, V>, E>
-        where E: Error,
-    {
-        Ok(HashMap::new())
-    }
-
-    #[inline]
-    fn visit_map<V_>(&mut self, mut visitor: V_) -> Result<HashMap<K, V>, V_::Error>
-        where V_: MapVisitor,
-    {
-        let (len, _) = visitor.size_hint();
-        let mut values = HashMap::with_capacity(len);
-
-        while let Some((key, value)) = try!(visitor.visit()) {
-            values.insert(key, value);
-        }
-
-        try!(visitor.end());
-
-        Ok(values)
-    }
-}
-
-impl<K, V> Deserialize for HashMap<K, V>
-    where K: Deserialize + Eq + Hash,
-          V: Deserialize,
-{
-    fn deserialize<D>(deserializer: &mut D) -> Result<HashMap<K, V>, D::Error>
-        where D: Deserializer,
-    {
-        deserializer.visit(HashMapVisitor::new())
-    }
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-// FIXME: `VecMap` is unstable.
-/*
-pub struct VecMapVisitor<V> {
-    marker: PhantomData<VecMap<V>>,
-}
-
-impl<V> VecMapVisitor<V> {
-    #[inline]
-    pub fn new() -> Self {
-        VecMapVisitor {
-            marker: PhantomData,
-        }
-    }
-}
-
-impl<V> Visitor for VecMapVisitor<V>
-    where V: Deserialize,
-{
-    type Value = VecMap<V>;
-
-    #[inline]
-    fn visit_unit<E>(&mut self) -> Result<VecMap<V>, E>
-        where E: Error,
-    {
-        Ok(VecMap::new())
-    }
-
-    #[inline]
-    fn visit_map<V_>(&mut self, mut visitor: V_) -> Result<VecMap<V>, V_::Error>
-        where V_: MapVisitor,
-    {
-        let (len, _) = visitor.size_hint();
-        let mut values = VecMap::with_capacity(len);
-
-        while let Some((key, value)) = try!(visitor.visit()) {
-            values.insert(key, value);
-        }
-
-        try!(visitor.end());
-
-        Ok(values)
-    }
-}
-
-impl<V> Deserialize for VecMap<V>
-    where V: Deserialize,
-{
-    fn deserialize<D>(deserializer: &mut D) -> Result<VecMap<V>, D::Error>
-        where D: Deserializer,
-    {
-        deserializer.visit(VecMapVisitor::new())
-    }
-}
-*/
-
-///////////////////////////////////////////////////////////////////////////////
-
-struct PathBufVisitor;
-
-impl Visitor for PathBufVisitor {
-    type Value = path::PathBuf;
-
-    fn visit_str<E>(&mut self, v: &str) -> Result<path::PathBuf, E>
-        where E: Error,
-    {
-        Ok(From::from(v))
-    }
-
-    fn visit_string<E>(&mut self, v: String) -> Result<path::PathBuf, E>
-        where E: Error,
-    {
-        self.visit_str(&v)
-    }
-}
-
-impl Deserialize for path::PathBuf {
-    fn deserialize<D>(deserializer: &mut D) -> Result<path::PathBuf, D::Error>
-        where D: Deserializer,
-    {
-        deserializer.visit(PathBufVisitor)
-    }
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-impl<T: Deserialize> Deserialize for Box<T> {
-    fn deserialize<D>(deserializer: &mut D) -> Result<Box<T>, D::Error>
-        where D: Deserializer,
-    {
-        let val = try!(Deserialize::deserialize(deserializer));
-        Ok(Box::new(val))
-    }
-}
-
-impl<T: Deserialize> Deserialize for Arc<T> {
-    fn deserialize<D>(deserializer: &mut D) -> Result<Arc<T>, D::Error>
-        where D: Deserializer,
-    {
-        let val = try!(Deserialize::deserialize(deserializer));
-        Ok(Arc::new(val))
-    }
-}
-
-impl<T: Deserialize> Deserialize for Rc<T> {
-    fn deserialize<D>(deserializer: &mut D) -> Result<Rc<T>, D::Error>
-        where D: Deserializer,
-    {
-        let val = try!(Deserialize::deserialize(deserializer));
-        Ok(Rc::new(val))
-    }
-}

src/de/mod.rs

@@ -1,469 +0,0 @@
-//! Generic deserialization framework.
-
-pub mod impls;
-pub mod value;
-
-///////////////////////////////////////////////////////////////////////////////
-
-pub trait Error {
-    fn syntax_error() -> Self;
-
-    fn end_of_stream_error() -> Self;
-
-    fn unknown_field_error(field: &str) -> Self;
-
-    fn missing_field_error(field: &'static str) -> Self;
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-pub trait Deserialize {
-    /// Deserialize this value given this `Deserializer`.
-    fn deserialize<D>(deserializer: &mut D) -> Result<Self, D::Error>
-        where D: Deserializer;
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-/// `Deserializer` is an abstract trait that can deserialize values into a `Visitor`.
-pub trait Deserializer {
-    type Error: Error;
-
-    /// The `visit` method walks a visitor through a value as it is being deserialized.
-    fn visit<V>(&mut self, visitor: V) -> Result<V::Value, Self::Error>
-        where V: Visitor;
-
-    /// The `visit_option` method allows a `Deserialize` type to inform the `Deserializer` that
-    /// it's expecting an optional value. This allows deserializers that encode an optional value
-    /// as a nullable value to convert the null value into a `None`, and a regular value as
-    /// `Some(value)`.
-    #[inline]
-    fn visit_option<V>(&mut self, visitor: V) -> Result<V::Value, Self::Error>
-        where V: Visitor,
-    {
-        self.visit(visitor)
-    }
-
-    /// The `visit_seq` method allows a `Deserialize` type to inform the `Deserializer` that it's
-    /// expecting a sequence of values. This allows deserializers to parse sequences that aren't
-    /// tagged as sequences.
-    #[inline]
-    fn visit_seq<V>(&mut self, visitor: V) -> Result<V::Value, Self::Error>
-        where V: Visitor,
-    {
-        self.visit(visitor)
-    }
-
-    /// The `visit_map` method allows a `Deserialize` type to inform the `Deserializer` that it's
-    /// expecting a map of values. This allows deserializers to parse sequences that aren't tagged
-    /// as maps.
-    #[inline]
-    fn visit_map<V>(&mut self, visitor: V) -> Result<V::Value, Self::Error>
-        where V: Visitor,
-    {
-        self.visit(visitor)
-    }
-
-    /// The `visit_named_unit` method allows a `Deserialize` type to inform the `Deserializer` that
-    /// it's expecting a named unit. This allows deserializers to a named unit that aren't tagged
-    /// as a named unit.
-    #[inline]
-    fn visit_named_unit<V>(&mut self, _name: &str, visitor: V) -> Result<V::Value, Self::Error>
-        where V: Visitor,
-    {
-        self.visit(visitor)
-    }
-
-    /// The `visit_named_seq` method allows a `Deserialize` type to inform the `Deserializer` that
-    /// it's expecting a named sequence of values. This allows deserializers to parse sequences
-    /// that aren't tagged as sequences.
-    #[inline]
-    fn visit_named_seq<V>(&mut self, _name: &str, visitor: V) -> Result<V::Value, Self::Error>
-        where V: Visitor,
-    {
-        self.visit_seq(visitor)
-    }
-
-    /// The `visit_named_map` method allows a `Deserialize` type to inform the `Deserializer` that
-    /// it's expecting a map of values. This allows deserializers to parse sequences that aren't
-    /// tagged as maps.
-    #[inline]
-    fn visit_named_map<V>(&mut self, _name: &str, visitor: V) -> Result<V::Value, Self::Error>
-        where V: Visitor,
-    {
-        self.visit_map(visitor)
-    }
-
-    /// The `visit_enum` method allows a `Deserialize` type to inform the `Deserializer` that it's
-    /// expecting an enum value. This allows deserializers that provide a custom enumeration
-    /// serialization to properly deserialize the type.
-    #[inline]
-    fn visit_enum<V>(&mut self, _enum: &str, _visitor: V) -> Result<V::Value, Self::Error>
-        where V: EnumVisitor,
-    {
-        Err(Error::syntax_error())
-    }
-
-    /// The `visit_bytes` method allows a `Deserialize` type to inform the `Deserializer` that it's
-    /// expecting a `Vec<u8>`. This allows deserializers that provide a custom byte vector
-    /// serialization to properly deserialize the type.
-    #[inline]
-    fn visit_bytes<V>(&mut self, visitor: V) -> Result<V::Value, Self::Error>
-        where V: Visitor,
-    {
-        self.visit(visitor)
-    }
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-pub trait Visitor {
-    type Value;
-
-    fn visit_bool<E>(&mut self, _v: bool) -> Result<Self::Value, E>
-        where E: Error,
-    {
-        Err(Error::syntax_error())
-    }
-
-    fn visit_isize<E>(&mut self, v: isize) -> Result<Self::Value, E>
-        where E: Error,
-    {
-        self.visit_i64(v as i64)
-    }
-
-    fn visit_i8<E>(&mut self, v: i8) -> Result<Self::Value, E>
-        where E: Error,
-    {
-        self.visit_i64(v as i64)
-    }
-
-    fn visit_i16<E>(&mut self, v: i16) -> Result<Self::Value, E>
-        where E: Error,
-    {
-        self.visit_i64(v as i64)
-    }
-
-    fn visit_i32<E>(&mut self, v: i32) -> Result<Self::Value, E>
-        where E: Error,
-    {
-        self.visit_i64(v as i64)
-    }
-
-    fn visit_i64<E>(&mut self, _v: i64) -> Result<Self::Value, E>
-        where E: Error,
-    {
-        Err(Error::syntax_error())
-    }
-
-    fn visit_usize<E>(&mut self, v: usize) -> Result<Self::Value, E>
-        where E: Error,
-    {
-        self.visit_u64(v as u64)
-    }
-
-    fn visit_u8<E>(&mut self, v: u8) -> Result<Self::Value, E>
-        where E: Error,
-    {
-        self.visit_u64(v as u64)
-    }
-
-    fn visit_u16<E>(&mut self, v: u16) -> Result<Self::Value, E>
-        where E: Error,
-    {
-        self.visit_u64(v as u64)
-    }
-
-    fn visit_u32<E>(&mut self, v: u32) -> Result<Self::Value, E>
-        where E: Error,
-    {
-        self.visit_u64(v as u64)
-    }
-
-    fn visit_u64<E>(&mut self, _v: u64) -> Result<Self::Value, E>
-        where E: Error,
-    {
-        Err(Error::syntax_error())
-    }
-
-    fn visit_f32<E>(&mut self, v: f32) -> Result<Self::Value, E>
-        where E: Error,
-    {
-        self.visit_f64(v as f64)
-    }
-
-    fn visit_f64<E>(&mut self, _v: f64) -> Result<Self::Value, E>
-        where E: Error,
-    {
-        Err(Error::syntax_error())
-    }
-
-    #[inline]
-    fn visit_char<E>(&mut self, v: char) -> Result<Self::Value, E>
-        where E: Error,
-    {
-        // FIXME: this allocation is required in order to be compatible with stable rust, which
-        // doesn't support encoding a `char` into a stack buffer.
-        self.visit_string(v.to_string())
-    }
-
-    fn visit_str<E>(&mut self, _v: &str) -> Result<Self::Value, E>
-        where E: Error,
-    {
-        Err(Error::syntax_error())
-    }
-
-    #[inline]
-    fn visit_string<E>(&mut self, v: String) -> Result<Self::Value, E>
-        where E: Error,
-    {
-        self.visit_str(&v)
-    }
-
-    fn visit_unit<E>(&mut self) -> Result<Self::Value, E>
-        where E: Error,
-    {
-        Err(Error::syntax_error())
-    }
-
-    #[inline]
-    fn visit_named_unit<E>(&mut self, _name: &str) -> Result<Self::Value, E>
-        where E: Error,
-    {
-        self.visit_unit()
-    }
-
-    fn visit_none<E>(&mut self) -> Result<Self::Value, E>
-        where E: Error,
-    {
-        Err(Error::syntax_error())
-    }
-
-    fn visit_some<D>(&mut self, _deserializer: &mut D) -> Result<Self::Value, D::Error>
-        where D: Deserializer,
-    {
-        Err(Error::syntax_error())
-    }
-
-    fn visit_seq<V>(&mut self, _visitor: V) -> Result<Self::Value, V::Error>
-        where V: SeqVisitor,
-    {
-        Err(Error::syntax_error())
-    }
-
-    fn visit_map<V>(&mut self, _visitor: V) -> Result<Self::Value, V::Error>
-        where V: MapVisitor,
-    {
-        Err(Error::syntax_error())
-    }
-
-    fn visit_bytes<E>(&mut self, _v: &[u8]) -> Result<Self::Value, E>
-        where E: Error,
-    {
-        Err(Error::syntax_error())
-    }
-
-    fn visit_byte_buf<E>(&mut self, _v: Vec<u8>) -> Result<Self::Value, E>
-        where E: Error,
-    {
-        Err(Error::syntax_error())
-    }
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-pub trait SeqVisitor {
-    type Error: Error;
-
-    fn visit<T>(&mut self) -> Result<Option<T>, Self::Error>
-        where T: Deserialize;
-
-    fn end(&mut self) -> Result<(), Self::Error>;
-
-    #[inline]
-    fn size_hint(&self) -> (usize, Option<usize>) {
-        (0, None)
-    }
-}
-
-impl<'a, V> SeqVisitor for &'a mut V where V: SeqVisitor {
-    type Error = V::Error;
-
-    #[inline]
-    fn visit<T>(&mut self) -> Result<Option<T>, V::Error>
-        where T: Deserialize
-    {
-        (**self).visit()
-    }
-
-    #[inline]
-    fn end(&mut self) -> Result<(), V::Error> {
-        (**self).end()
-    }
-
-    #[inline]
-    fn size_hint(&self) -> (usize, Option<usize>) {
-        (**self).size_hint()
-    }
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-pub trait MapVisitor {
-    type Error: Error;
-
-    #[inline]
-    fn visit<K, V>(&mut self) -> Result<Option<(K, V)>, Self::Error>
-        where K: Deserialize,
-              V: Deserialize,
-    {
-        match try!(self.visit_key()) {
-            Some(key) => {
-                let value = try!(self.visit_value());
-                Ok(Some((key, value)))
-            }
-            None => Ok(None)
-        }
-    }
-
-    fn visit_key<K>(&mut self) -> Result<Option<K>, Self::Error>
-        where K: Deserialize;
-
-    fn visit_value<V>(&mut self) -> Result<V, Self::Error>
-        where V: Deserialize;
-
-    fn end(&mut self) -> Result<(), Self::Error>;
-
-    #[inline]
-    fn size_hint(&self) -> (usize, Option<usize>) {
-        (0, None)
-    }
-
-    fn missing_field<V>(&mut self, field: &'static str) -> Result<V, Self::Error>
-        where V: Deserialize,
-    {
-        Err(Error::missing_field_error(field))
-    }
-}
-
-impl<'a, V_> MapVisitor for &'a mut V_ where V_: MapVisitor {
-    type Error = V_::Error;
-
-    #[inline]
-    fn visit<K, V>(&mut self) -> Result<Option<(K, V)>, V_::Error>
-        where K: Deserialize,
-              V: Deserialize,
-    {
-        (**self).visit()
-    }
-
-    #[inline]
-    fn visit_key<K>(&mut self) -> Result<Option<K>, V_::Error>
-        where K: Deserialize
-    {
-        (**self).visit_key()
-    }
-
-    #[inline]
-    fn visit_value<V>(&mut self) -> Result<V, V_::Error>
-        where V: Deserialize
-    {
-        (**self).visit_value()
-    }
-
-    #[inline]
-    fn end(&mut self) -> Result<(), V_::Error> {
-        (**self).end()
-    }
-
-    #[inline]
-    fn size_hint(&self) -> (usize, Option<usize>) {
-        (**self).size_hint()
-    }
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-/// `EnumVisitor` is a visitor that is created by the `Deserialize` and passed to the
-/// `Deserializer` in order to deserialize enums.
-pub trait EnumVisitor {
-    type Value;
-
-    fn visit<V>(&mut self, visitor: V) -> Result<Self::Value, V::Error>
-        where V: VariantVisitor;
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-/// `VariantVisitor` is a visitor that is created by the `Deserializer` and passed to the
-/// `Deserialize` in order to deserialize a specific enum variant.
-pub trait VariantVisitor {
-    type Error: Error;
-
-    /// `visit_variant` is called to identify which variant to deserialize.
-    fn visit_variant<V>(&mut self) -> Result<V, Self::Error>
-        where V: Deserialize;
-
-    /// `visit_unit` is called when deserializing a variant with no values.
-    fn visit_unit(&mut self) -> Result<(), Self::Error> {
-        Err(Error::syntax_error())
-    }
-
-    /// `visit_seq` is called when deserializing a tuple-like variant.
-    fn visit_seq<V>(&mut self, _visitor: V) -> Result<V::Value, Self::Error>
-        where V: Visitor
-    {
-        Err(Error::syntax_error())
-    }
-
-    /// `visit_map` is called when deserializing a struct-like variant.
-    fn visit_map<V>(&mut self, _visitor: V) -> Result<V::Value, Self::Error>
-        where V: Visitor
-    {
-        Err(Error::syntax_error())
-    }
-}
-
-impl<'a, T> VariantVisitor for &'a mut T where T: VariantVisitor {
-    type Error = T::Error;
-
-    fn visit_variant<V>(&mut self) -> Result<V, T::Error>
-        where V: Deserialize
-    {
-        (**self).visit_variant()
-    }
-
-    fn visit_unit(&mut self) -> Result<(), T::Error> {
-        (**self).visit_unit()
-    }
-
-    fn visit_seq<V>(&mut self, visitor: V) -> Result<V::Value, T::Error>
-        where V: Visitor,
-    {
-        (**self).visit_seq(visitor)
-    }
-
-    fn visit_map<V>(&mut self, visitor: V) -> Result<V::Value, T::Error>
-        where V: Visitor,
-    {
-        (**self).visit_map(visitor)
-    }
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-pub trait EnumSeqVisitor {
-    type Value;
-
-    fn visit<V>(&mut self, visitor: V) -> Result<Self::Value, V::Error>
-        where V: SeqVisitor;
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-pub trait EnumMapVisitor {
-    type Value;
-
-    fn visit<V>(&mut self, visitor: V) -> Result<Self::Value, V::Error>
-        where V: MapVisitor;
-}

src/de/value.rs

@@ -1,411 +0,0 @@
-use std::collections::{
-    BTreeMap,
-    BTreeSet,
-    HashMap,
-    HashSet,
-    btree_map,
-    btree_set,
-    hash_map,
-    hash_set,
-};
-use std::hash::Hash;
-use std::vec;
-
-use de;
-
-///////////////////////////////////////////////////////////////////////////////
-
-pub enum Error {
-    SyntaxError,
-    EndOfStreamError,
-    UnknownFieldError(String),
-    MissingFieldError(&'static str),
-}
-
-impl de::Error for Error {
-    fn syntax_error() -> Self { Error::SyntaxError }
-    fn end_of_stream_error() -> Self { Error::EndOfStreamError }
-    fn unknown_field_error(field: &str) -> Self { Error::UnknownFieldError(field.to_string()) }
-    fn missing_field_error(field: &'static str) -> Self { Error::MissingFieldError(field) }
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-pub trait ValueDeserializer {
-    type Deserializer: de::Deserializer<Error=Error>;
-
-    fn into_deserializer(self) -> Self::Deserializer;
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-impl ValueDeserializer for () {
-    type Deserializer = UnitDeserializer;
-
-    fn into_deserializer(self) -> UnitDeserializer {
-        UnitDeserializer
-    }
-}
-
-/// A helper deserializer that deserializes a `()`.
-pub struct UnitDeserializer;
-
-impl de::Deserializer for UnitDeserializer {
-    type Error = Error;
-
-    fn visit<V>(&mut self, mut visitor: V) -> Result<V::Value, Error>
-        where V: de::Visitor,
-    {
-        visitor.visit_unit()
-    }
-
-    fn visit_option<V>(&mut self, mut visitor: V) -> Result<V::Value, Error>
-        where V: de::Visitor,
-    {
-        visitor.visit_none()
-    }
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-macro_rules! primitive_deserializer {
-    ($ty:ty, $name:ident, $method:ident) => {
-        pub struct $name(Option<$ty>);
-
-        impl ValueDeserializer for $ty {
-            type Deserializer = $name;
-
-            fn into_deserializer(self) -> $name {
-                $name(Some(self))
-            }
-        }
-
-        impl de::Deserializer for $name {
-            type Error = Error;
-
-            fn visit<V>(&mut self, mut visitor: V) -> Result<V::Value, Error>
-                where V: de::Visitor,
-            {
-                match self.0.take() {
-                    Some(v) => visitor.$method(v),
-                    None => Err(de::Error::end_of_stream_error()),
-                }
-            }
-        }
-    }
-}
-
-primitive_deserializer!(bool, BoolDeserializer, visit_bool);
-primitive_deserializer!(i8, I8Deserializer, visit_i8);
-primitive_deserializer!(i16, I16Deserializer, visit_i16);
-primitive_deserializer!(i32, I32Deserializer, visit_i32);
-primitive_deserializer!(i64, I64Deserializer, visit_i64);
-primitive_deserializer!(isize, IsizeDeserializer, visit_isize);
-primitive_deserializer!(u8, U8Deserializer, visit_u8);
-primitive_deserializer!(u16, U16Deserializer, visit_u16);
-primitive_deserializer!(u32, U32Deserializer, visit_u32);
-primitive_deserializer!(u64, U64Deserializer, visit_u64);
-primitive_deserializer!(usize, UsizeDeserializer, visit_usize);
-primitive_deserializer!(f32, F32Deserializer, visit_f32);
-primitive_deserializer!(f64, F64Deserializer, visit_f64);
-primitive_deserializer!(char, CharDeserializer, visit_char);
-
-///////////////////////////////////////////////////////////////////////////////
-
-/// A helper deserializer that deserializes a `&str`.
-pub struct StrDeserializer<'a>(Option<&'a str>);
-
-impl<'a> ValueDeserializer for &'a str {
-    type Deserializer = StrDeserializer<'a>;
-
-    fn into_deserializer(self) -> StrDeserializer<'a> {
-        StrDeserializer(Some(self))
-    }
-}
-
-impl<'a> de::Deserializer for StrDeserializer<'a> {
-    type Error = Error;
-
-    fn visit<V>(&mut self, mut visitor: V) -> Result<V::Value, Error>
-        where V: de::Visitor,
-    {
-        match self.0.take() {
-            Some(v) => visitor.visit_str(v),
-            None => Err(de::Error::end_of_stream_error()),
-        }
-    }
-
-    fn visit_enum<V>(&mut self, _name: &str, mut visitor: V) -> Result<V::Value, Error>
-        where V: de::EnumVisitor,
-    {
-        visitor.visit(self)
-    }
-}
-
-impl<'a> de::VariantVisitor for StrDeserializer<'a> {
-    type Error = Error;
-
-    fn visit_variant<T>(&mut self) -> Result<T, Error>
-        where T: de::Deserialize,
-    {
-        de::Deserialize::deserialize(self)
-    }
-
-    fn visit_unit(&mut self) -> Result<(), Error> {
-        Ok(())
-    }
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-/// A helper deserializer that deserializes a `String`.
-pub struct StringDeserializer(Option<String>);
-
-impl ValueDeserializer for String {
-    type Deserializer = StringDeserializer;
-
-    fn into_deserializer(self) -> StringDeserializer {
-        StringDeserializer(Some(self))
-    }
-}
-
-impl de::Deserializer for StringDeserializer {
-    type Error = Error;
-
-    fn visit<V>(&mut self, mut visitor: V) -> Result<V::Value, Error>
-        where V: de::Visitor,
-    {
-        match self.0.take() {
-            Some(string) => visitor.visit_string(string),
-            None => Err(de::Error::end_of_stream_error()),
-        }
-    }
-
-    fn visit_enum<V>(&mut self, _name: &str, mut visitor: V) -> Result<V::Value, Error>
-        where V: de::EnumVisitor,
-    {
-        visitor.visit(self)
-    }
-}
-
-impl<'a> de::VariantVisitor for StringDeserializer {
-    type Error = Error;
-
-    fn visit_variant<T>(&mut self) -> Result<T, Error>
-        where T: de::Deserialize,
-    {
-        de::Deserialize::deserialize(self)
-    }
-
-    fn visit_unit(&mut self) -> Result<(), Error> {
-        Ok(())
-    }
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-pub struct SeqDeserializer<I> {
-    iter: I,
-    len: usize,
-}
-
-impl<I> SeqDeserializer<I> {
-    pub fn new(iter: I, len: usize) -> Self {
-        SeqDeserializer {
-            iter: iter,
-            len: len,
-        }
-    }
-}
-
-impl<I, T> de::Deserializer for SeqDeserializer<I>
-    where I: Iterator<Item=T>,
-          T: ValueDeserializer,
-{
-    type Error = Error;
-
-    fn visit<V>(&mut self, mut visitor: V) -> Result<V::Value, Error>
-        where V: de::Visitor,
-    {
-        visitor.visit_seq(self)
-    }
-}
-
-impl<I, T> de::SeqVisitor for SeqDeserializer<I>
-    where I: Iterator<Item=T>,
-          T: ValueDeserializer,
-{
-    type Error = Error;
-
-    fn visit<V>(&mut self) -> Result<Option<V>, Error>
-        where V: de::Deserialize
-    {
-        match self.iter.next() {
-            Some(value) => {
-                self.len -= 1;
-                let mut de = value.into_deserializer();
-                Ok(Some(try!(de::Deserialize::deserialize(&mut de))))
-            }
-            None => Ok(None),
-        }
-    }
-
-    fn end(&mut self) -> Result<(), Error> {
-        if self.len == 0 {
-            Ok(())
-        } else {
-            Err(de::Error::end_of_stream_error())
-        }
-    }
-
-    fn size_hint(&self) -> (usize, Option<usize>) {
-        (self.len, Some(self.len))
-    }
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-impl<T> ValueDeserializer for Vec<T>
-    where T: ValueDeserializer,
-{
-    type Deserializer = SeqDeserializer<vec::IntoIter<T>>;
-
-    fn into_deserializer(self) -> SeqDeserializer<vec::IntoIter<T>> {
-        let len = self.len();
-        SeqDeserializer::new(self.into_iter(), len)
-    }
-}
-
-impl<T> ValueDeserializer for BTreeSet<T>
-    where T: ValueDeserializer + Eq + Ord,
-{
-    type Deserializer = SeqDeserializer<btree_set::IntoIter<T>>;
-
-    fn into_deserializer(self) -> SeqDeserializer<btree_set::IntoIter<T>> {
-        let len = self.len();
-        SeqDeserializer::new(self.into_iter(), len)
-    }
-}
-
-impl<T> ValueDeserializer for HashSet<T>
-    where T: ValueDeserializer + Eq + Hash,
-{
-    type Deserializer = SeqDeserializer<hash_set::IntoIter<T>>;
-
-    fn into_deserializer(self) -> SeqDeserializer<hash_set::IntoIter<T>> {
-        let len = self.len();
-        SeqDeserializer::new(self.into_iter(), len)
-    }
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-pub struct MapDeserializer<I, K, V>
-    where I: Iterator<Item=(K, V)>,
-          K: ValueDeserializer,
-          V: ValueDeserializer,
-{
-    iter: I,
-    value: Option<V>,
-    len: usize,
-}
-
-impl<I, K, V> MapDeserializer<I, K, V>
-    where I: Iterator<Item=(K, V)>,
-          K: ValueDeserializer,
-          V: ValueDeserializer,
-{
-    pub fn new(iter: I, len: usize) -> Self {
-        MapDeserializer {
-            iter: iter,
-            value: None,
-            len: len,
-        }
-    }
-}
-
-impl<I, K, V> de::Deserializer for MapDeserializer<I, K, V>
-    where I: Iterator<Item=(K, V)>,
-          K: ValueDeserializer,
-          V: ValueDeserializer,
-{
-    type Error = Error;
-
-    fn visit<V_>(&mut self, mut visitor: V_) -> Result<V_::Value, Error>
-        where V_: de::Visitor,
-    {
-        visitor.visit_map(self)
-    }
-}
-
-impl<I, K, V> de::MapVisitor for MapDeserializer<I, K, V>
-    where I: Iterator<Item=(K, V)>,
-          K: ValueDeserializer,
-          V: ValueDeserializer,
-{
-    type Error = Error;
-
-    fn visit_key<T>(&mut self) -> Result<Option<T>, Error>
-        where T: de::Deserialize,
-    {
-        match self.iter.next() {
-            Some((key, value)) => {
-                self.len -= 1;
-                self.value = Some(value);
-                let mut de = key.into_deserializer();
-                Ok(Some(try!(de::Deserialize::deserialize(&mut de))))
-            }
-            None => Ok(None),
-        }
-    }
-
-    fn visit_value<T>(&mut self) -> Result<T, Error>
-        where T: de::Deserialize,
-    {
-        match self.value.take() {
-            Some(value) => {
-                let mut de = value.into_deserializer();
-                de::Deserialize::deserialize(&mut de)
-            }
-            None => Err(de::Error::syntax_error())
-        }
-    }
-
-    fn end(&mut self) -> Result<(), Error> {
-        if self.len == 0 {
-            Ok(())
-        } else {
-            Err(de::Error::end_of_stream_error())
-        }
-    }
-
-    fn size_hint(&self) -> (usize, Option<usize>) {
-        (self.len, Some(self.len))
-    }
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-impl<K, V> ValueDeserializer for BTreeMap<K, V>
-    where K: ValueDeserializer + Eq + Ord,
-          V: ValueDeserializer,
-{
-    type Deserializer = MapDeserializer<btree_map::IntoIter<K, V>, K, V>;
-
-    fn into_deserializer(self) -> MapDeserializer<btree_map::IntoIter<K, V>, K, V> {
-        let len = self.len();
-        MapDeserializer::new(self.into_iter(), len)
-    }
-}
-
-impl<K, V> ValueDeserializer for HashMap<K, V>
-    where K: ValueDeserializer + Eq + Hash,
-          V: ValueDeserializer,
-{
-    type Deserializer = MapDeserializer<hash_map::IntoIter<K, V>, K, V>;
-
-    fn into_deserializer(self) -> MapDeserializer<hash_map::IntoIter<K, V>, K, V> {
-        let len = self.len();
-        MapDeserializer::new(self.into_iter(), len)
-    }
-}

src/iter.rs

@@ -1,51 +0,0 @@
-use std::io;
-
-pub struct LineColIterator<Iter: Iterator<Item=io::Result<u8>>> {
-    iter: Iter,
-    line: usize,
-    col: usize,
-}
-
-impl<Iter: Iterator<Item=io::Result<u8>>> LineColIterator<Iter> {
-    pub fn new(iter: Iter) -> LineColIterator<Iter> {
-        LineColIterator {
-            iter: iter,
-            line: 1,
-            col: 0,
-        }
-    }
-
-    /// Report the current line inside the iterator.
-    pub fn line(&self) -> usize { self.line }
-
-    /// Report the current column inside the iterator.
-    pub fn col(&self) -> usize { self.col }
-
-    /// Gets a reference to the underlying iterator.
-    pub fn get_ref(&self) -> &Iter { &self.iter }
-
-    /// Gets a mutable reference to the underlying iterator.
-    pub fn get_mut(&self) -> &Iter { &self.iter }
-
-    /// Unwraps this `LineColIterator`, returning the underlying iterator.
-    pub fn into_inner(self) -> Iter { self.iter }
-}
-
-impl<Iter: Iterator<Item=io::Result<u8>>> Iterator for LineColIterator<Iter> {
-    type Item = io::Result<u8>;
-    fn next(&mut self) -> Option<io::Result<u8>> {
-        match self.iter.next() {
-            None => None,
-            Some(Ok(b'\n')) => {
-                self.line += 1;
-                self.col = 0;
-                Some(Ok(b'\n'))
-            },
-            Some(Ok(c)) => {
-                self.col += 1;
-                Some(Ok(c))
-            },
-            Some(Err(e)) => Some(Err(e)),
-        }
-    }
-}

src/json/builder.rs

@@ -1,84 +0,0 @@
-// Copyright 2012-2014 The Rust Project Developers. See the COPYRIGHT
-// file at the top-level directory of this distribution and at
-// http://rust-lang.org/COPYRIGHT.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
-use std::collections::BTreeMap;
-
-use ser::{self, Serialize};
-use json::value::{self, Value};
-
-pub struct ArrayBuilder {
-    array: Vec<Value>,
-}
-
-impl ArrayBuilder {
-    pub fn new() -> ArrayBuilder {
-        ArrayBuilder { array: Vec::new() }
-    }
-
-    pub fn unwrap(self) -> Value {
-        Value::Array(self.array)
-    }
-
-    pub fn push<T: ser::Serialize>(mut self, v: T) -> ArrayBuilder {
-        self.array.push(value::to_value(&v));
-        self
-    }
-
-    pub fn push_array<F>(mut self, f: F) -> ArrayBuilder where
-        F: FnOnce(ArrayBuilder) -> ArrayBuilder
-    {
-        let builder = ArrayBuilder::new();
-        self.array.push(f(builder).unwrap());
-        self
-    }
-
-    pub fn push_object<F>(mut self, f: F) -> ArrayBuilder where
-        F: FnOnce(ObjectBuilder) -> ObjectBuilder
-    {
-        let builder = ObjectBuilder::new();
-        self.array.push(f(builder).unwrap());
-        self
-    }
-}
-
-pub struct ObjectBuilder {
-    object: BTreeMap<String, Value>,
-}
-
-impl ObjectBuilder {
-    pub fn new() -> ObjectBuilder {
-        ObjectBuilder { object: BTreeMap::new() }
-    }
-
-    pub fn unwrap(self) -> Value {
-        Value::Object(self.object)
-    }
-
-    pub fn insert<V: ser::Serialize>(mut self, k: String, v: V) -> ObjectBuilder {
-        self.object.insert(k, value::to_value(&v));
-        self
-    }
-
-    pub fn insert_array<F>(mut self, key: String, f: F) -> ObjectBuilder where
-        F: FnOnce(ArrayBuilder) -> ArrayBuilder
-    {
-        let builder = ArrayBuilder::new();
-        self.object.insert(key, f(builder).unwrap());
-        self
-    }
-
-    pub fn insert_object<F>(mut self, key: String, f: F) -> ObjectBuilder where
-        F: FnOnce(ObjectBuilder) -> ObjectBuilder
-    {
-        let builder = ObjectBuilder::new();
-        self.object.insert(key, f(builder).unwrap());
-        self
-    }
-}

src/json/de.rs

@@ -1,675 +0,0 @@
-use std::char;
-use std::io;
-use std::str;
-
-use de;
-use iter::LineColIterator;
-
-use super::error::{Error, ErrorCode};
-
-pub struct Deserializer<Iter: Iterator<Item=io::Result<u8>>> {
-    rdr: LineColIterator<Iter>,
-    ch: Option<u8>,
-    str_buf: Vec<u8>,
-}
-
-impl<Iter> Deserializer<Iter>
-    where Iter: Iterator<Item=io::Result<u8>>,
-{
-    /// Creates the JSON parser from an `std::iter::Iterator`.
-    #[inline]
-    pub fn new(rdr: Iter) -> Result<Deserializer<Iter>, Error> {
-        let mut deserializer = Deserializer {
-            rdr: LineColIterator::new(rdr),
-            ch: None,
-            str_buf: Vec::with_capacity(128),
-        };
-
-        try!(deserializer.bump());
-
-        Ok(deserializer)
-    }
-
-    #[inline]
-    pub fn end(&mut self) -> Result<(), Error> {
-        try!(self.parse_whitespace());
-        if self.eof() {
-            Ok(())
-        } else {
-            Err(self.error(ErrorCode::TrailingCharacters))
-        }
-    }
-
-    fn eof(&self) -> bool { self.ch.is_none() }
-
-    fn ch_or_null(&self) -> u8 { self.ch.unwrap_or(b'\x00') }
-
-    fn bump(&mut self) -> Result<(), Error> {
-        self.ch = match self.rdr.next() {
-            Some(Err(err)) => { return Err(Error::IoError(err)); }
-            Some(Ok(ch)) => Some(ch),
-            None => None,
-        };
-
-        Ok(())
-    }
-
-    fn next_char(&mut self) -> Result<Option<u8>, Error> {
-        try!(self.bump());
-        Ok(self.ch)
-    }
-
-    fn ch_is(&self, c: u8) -> bool {
-        self.ch == Some(c)
-    }
-
-    fn error(&mut self, reason: ErrorCode) -> Error {
-        Error::SyntaxError(reason, self.rdr.line(), self.rdr.col())
-    }
-
-    fn parse_whitespace(&mut self) -> Result<(), Error> {
-        while self.ch_is(b' ') ||
-              self.ch_is(b'\n') ||
-              self.ch_is(b'\t') ||
-              self.ch_is(b'\r') { try!(self.bump()); }
-
-        Ok(())
-    }
-
-    fn parse_value<V>(&mut self, mut visitor: V) -> Result<V::Value, Error>
-        where V: de::Visitor,
-    {
-        try!(self.parse_whitespace());
-
-        if self.eof() {
-            return Err(self.error(ErrorCode::EOFWhileParsingValue));
-        }
-
-        let value = match self.ch_or_null() {
-            b'n' => {
-                try!(self.parse_ident(b"ull"));
-                visitor.visit_unit()
-            }
-            b't' => {
-                try!(self.parse_ident(b"rue"));
-                visitor.visit_bool(true)
-            }
-            b'f' => {
-                try!(self.parse_ident(b"alse"));
-                visitor.visit_bool(false)
-            }
-            b'0' ... b'9' | b'-' => self.parse_number(visitor),
-            b'"' => {
-                try!(self.parse_string());
-                let s = str::from_utf8(&self.str_buf).unwrap();
-                visitor.visit_str(s)
-            }
-            b'[' => {
-                try!(self.bump());
-                visitor.visit_seq(SeqVisitor::new(self))
-            }
-            b'{' => {
-                try!(self.bump());
-                visitor.visit_map(MapVisitor::new(self))
-            }
-            _ => {
-                Err(self.error(ErrorCode::ExpectedSomeValue))
-            }
-        };
-
-        match value {
-            Ok(value) => Ok(value),
-            Err(Error::SyntaxError(code, _, _)) => Err(self.error(code)),
-            Err(err) => Err(err),
-        }
-    }
-
-    fn parse_ident(&mut self, ident: &[u8]) -> Result<(), Error> {
-        for c in ident {
-            if Some(*c) != try!(self.next_char()) {
-                return Err(self.error(ErrorCode::ExpectedSomeIdent));
-            }
-        }
-
-        try!(self.bump());
-        Ok(())
-    }
-
-    fn parse_number<V>(&mut self, mut visitor: V) -> Result<V::Value, Error>
-        where V: de::Visitor,
-    {
-        let mut neg = false;
-
-        if self.ch_is(b'-') {
-            try!(self.bump());
-            neg = true;
-        }
-
-        let res = try!(self.parse_integer());
-
-        if self.ch_is(b'.') || self.ch_is(b'e') || self.ch_is(b'E') {
-            let mut res = res as f64;
-
-            if self.ch_is(b'.') {
-                res = try!(self.parse_decimal(res));
-            }
-
-            if self.ch_is(b'e') || self.ch_is(b'E') {
-                res = try!(self.parse_exponent(res));
-            }
-
-            if neg {
-                visitor.visit_f64(-res)
-            } else {
-                visitor.visit_f64(res)
-            }
-        } else {
-            if neg {
-                let res = -(res as i64);
-
-                // Make sure we didn't underflow.
-                if res > 0 {
-                    Err(self.error(ErrorCode::InvalidNumber))
-                } else {
-                    visitor.visit_i64(res)
-                }
-            } else {
-                visitor.visit_u64(res)
-            }
-        }
-    }
-
-    fn parse_integer(&mut self) -> Result<u64, Error> {
-        let mut res = 0;
-
-        match self.ch_or_null() {
-            b'0' => {
-                try!(self.bump());
-
-                // There can be only one leading '0'.
-                match self.ch_or_null() {
-                    b'0' ... b'9' => {
-                        return Err(self.error(ErrorCode::InvalidNumber));
-                    }
-                    _ => ()
-                }
-            },
-            b'1' ... b'9' => {
-                while !self.eof() {
-                    match self.ch_or_null() {
-                        c @ b'0' ... b'9' => {
-                            res *= 10;
-                            res += (c as u64) - (b'0' as u64);
-                            try!(self.bump());
-                        }
-                        _ => break,
-                    }
-                }
-            }
-            _ => { return Err(self.error(ErrorCode::InvalidNumber)); }
-        }
-
-        Ok(res)
-    }
-
-    fn parse_decimal(&mut self, res: f64) -> Result<f64, Error> {
-        try!(self.bump());
-
-        // Make sure a digit follows the decimal place.
-        match self.ch_or_null() {
-            b'0' ... b'9' => (),
-             _ => { return Err(self.error(ErrorCode::InvalidNumber)); }
-        }
-
-        let mut res = res;
-        let mut dec = 1.0;
-        while !self.eof() {
-            match self.ch_or_null() {
-                c @ b'0' ... b'9' => {
-                    dec /= 10.0;
-                    res += (((c as u64) - (b'0' as u64)) as f64) * dec;
-                    try!(self.bump());
-                }
-                _ => break,
-            }
-        }
-
-        Ok(res)
-    }
-
-    fn parse_exponent(&mut self, mut res: f64) -> Result<f64, Error> {
-        try!(self.bump());
-
-        let mut exp = 0;
-        let mut neg_exp = false;
-
-        if self.ch_is(b'+') {
-            try!(self.bump());
-        } else if self.ch_is(b'-') {
-            try!(self.bump());
-            neg_exp = true;
-        }
-
-        // Make sure a digit follows the exponent place.
-        match self.ch_or_null() {
-            b'0' ... b'9' => (),
-            _ => { return Err(self.error(ErrorCode::InvalidNumber)); }
-        }
-        while !self.eof() {
-            match self.ch_or_null() {
-                c @ b'0' ... b'9' => {
-                    exp *= 10;
-                    exp += (c as i32) - (b'0' as i32);
-
-                    try!(self.bump());
-                }
-                _ => break
-            }
-        }
-
-        let exp: f64 = 10_f64.powi(exp);
-        if neg_exp {
-            res /= exp;
-        } else {
-            res *= exp;
-        }
-
-        Ok(res)
-    }
-
-    fn decode_hex_escape(&mut self) -> Result<u16, Error> {
-        let mut i = 0;
-        let mut n = 0u16;
-        while i < 4 && !self.eof() {
-            try!(self.bump());
-            n = match self.ch_or_null() {
-                c @ b'0' ... b'9' => n * 16_u16 + ((c as u16) - (b'0' as u16)),
-                b'a' | b'A' => n * 16_u16 + 10_u16,
-                b'b' | b'B' => n * 16_u16 + 11_u16,
-                b'c' | b'C' => n * 16_u16 + 12_u16,
-                b'd' | b'D' => n * 16_u16 + 13_u16,
-                b'e' | b'E' => n * 16_u16 + 14_u16,
-                b'f' | b'F' => n * 16_u16 + 15_u16,
-                _ => { return Err(self.error(ErrorCode::InvalidEscape)); }
-            };
-
-            i += 1;
-        }
-
-        // Error out if we didn't parse 4 digits.
-        if i != 4 {
-            return Err(self.error(ErrorCode::InvalidEscape));
-        }
-
-        Ok(n)
-    }
-
-    fn parse_string(&mut self) -> Result<(), Error> {
-        self.str_buf.clear();
-
-        let mut escape = false;
-
-        loop {
-            let ch = match try!(self.next_char()) {
-                Some(ch) => ch,
-                None => { return Err(self.error(ErrorCode::EOFWhileParsingString)); }
-            };
-
-            if escape {
-                match ch {
-                    b'"' => self.str_buf.push(b'"'),
-                    b'\\' => self.str_buf.push(b'\\'),
-                    b'/' => self.str_buf.push(b'/'),
-                    b'b' => self.str_buf.push(b'\x08'),
-                    b'f' => self.str_buf.push(b'\x0c'),
-                    b'n' => self.str_buf.push(b'\n'),
-                    b'r' => self.str_buf.push(b'\r'),
-                    b't' => self.str_buf.push(b'\t'),
-                    b'u' => {
-                        let c = match try!(self.decode_hex_escape()) {
-                            0xDC00 ... 0xDFFF => {
-                                return Err(self.error(ErrorCode::LoneLeadingSurrogateInHexEscape));
-                            }
-
-                            // Non-BMP characters are encoded as a sequence of
-                            // two hex escapes, representing UTF-16 surrogates.
-                            n1 @ 0xD800 ... 0xDBFF => {
-                                match (try!(self.next_char()), try!(self.next_char())) {
-                                    (Some(b'\\'), Some(b'u')) => (),
-                                    _ => {
-                                        return Err(self.error(ErrorCode::UnexpectedEndOfHexEscape));
-                                    }
-                                }
-
-                                let n2 = try!(self.decode_hex_escape());
-
-                                if n2 < 0xDC00 || n2 > 0xDFFF {
-                                    return Err(self.error(ErrorCode::LoneLeadingSurrogateInHexEscape));
-                                }
-
-                                let n = (((n1 - 0xD800) as u32) << 10 |
-                                          (n2 - 0xDC00) as u32) + 0x1_0000;
-
-                                match char::from_u32(n as u32) {
-                                    Some(c) => c,
-                                    None => {
-                                        return Err(self.error(ErrorCode::InvalidUnicodeCodePoint));
-                                    }
-                                }
-                            }
-
-                            n => {
-                                match char::from_u32(n as u32) {
-                                    Some(c) => c,
-                                    None => {
-                                        return Err(self.error(ErrorCode::InvalidUnicodeCodePoint));
-                                    }
-                                }
-                            }
-                        };
-
-                        // FIXME: this allocation is required in order to be compatible with stable
-                        // rust, which doesn't support encoding a `char` into a stack buffer.
-                        let buf = c.to_string();
-                        self.str_buf.extend(buf.bytes());
-                    }
-                    _ => {
-                        return Err(self.error(ErrorCode::InvalidEscape));
-                    }
-                }
-                escape = false;
-            } else {
-                match ch {
-                    b'"' => {
-                        try!(self.bump());
-                        return Ok(());
-                    }
-                    b'\\' => {
-                        escape = true;
-                    }
-                    ch => {
-                        self.str_buf.push(ch);
-                    }
-                }
-            }
-        }
-    }
-
-    fn parse_object_colon(&mut self) -> Result<(), Error> {
-        try!(self.parse_whitespace());
-
-        if self.ch_is(b':') {
-            try!(self.bump());
-            Ok(())
-        } else if self.eof() {
-            Err(self.error(ErrorCode::EOFWhileParsingObject))
-        } else {
-            Err(self.error(ErrorCode::ExpectedColon))
-        }
-    }
-}
-
-impl<Iter> de::Deserializer for Deserializer<Iter>
-    where Iter: Iterator<Item=io::Result<u8>>,
-{
-    type Error = Error;
-
-    #[inline]
-    fn visit<V>(&mut self, visitor: V) -> Result<V::Value, Error>
-        where V: de::Visitor,
-    {
-        self.parse_value(visitor)
-    }
-
-    #[inline]
-    fn visit_option<V>(&mut self, mut visitor: V) -> Result<V::Value, Error>
-        where V: de::Visitor,
-    {
-        try!(self.parse_whitespace());
-
-        if self.eof() {
-            return Err(self.error(ErrorCode::EOFWhileParsingValue));
-        }
-
-        if self.ch_is(b'n') {
-            try!(self.parse_ident(b"ull"));
-            visitor.visit_none()
-        } else {
-            visitor.visit_some(self)
-        }
-    }
-
-    #[inline]
-    fn visit_enum<V>(&mut self, _name: &str, mut visitor: V) -> Result<V::Value, Error>
-        where V: de::EnumVisitor,
-    {
-        try!(self.parse_whitespace());
-
-        if self.ch_is(b'{') {
-            try!(self.bump());
-            try!(self.parse_whitespace());
-
-            let value = {
-                try!(visitor.visit(&mut *self))
-            };
-
-            try!(self.parse_whitespace());
-
-            if self.ch_is(b'}') {
-                try!(self.bump());
-                Ok(value)
-            } else {
-                Err(self.error(ErrorCode::ExpectedSomeValue))
-            }
-        } else {
-            Err(self.error(ErrorCode::ExpectedSomeValue))
-        }
-    }
-}
-
-struct SeqVisitor<'a, Iter: 'a + Iterator<Item=io::Result<u8>>> {
-    de: &'a mut Deserializer<Iter>,
-    first: bool,
-}
-
-impl<'a, Iter: Iterator<Item=io::Result<u8>>> SeqVisitor<'a, Iter> {
-    fn new(de: &'a mut Deserializer<Iter>) -> Self {
-        SeqVisitor {
-            de: de,
-            first: true,
-        }
-    }
-}
-
-impl<'a, Iter> de::SeqVisitor for SeqVisitor<'a, Iter>
-    where Iter: Iterator<Item=io::Result<u8>>,
-{
-    type Error = Error;
-
-    fn visit<T>(&mut self) -> Result<Option<T>, Error>
-        where T: de::Deserialize,
-    {
-        try!(self.de.parse_whitespace());
-
-        if self.de.ch_is(b']') {
-            return Ok(None);
-        }
-
-        if self.first {
-            self.first = false;
-        } else {
-            if self.de.ch_is(b',') {
-                try!(self.de.bump());
-            } else if self.de.eof() {
-                return Err(self.de.error(ErrorCode::EOFWhileParsingList));
-            } else {
-                return Err(self.de.error(ErrorCode::ExpectedListCommaOrEnd));
-            }
-        }
-
-        let value = try!(de::Deserialize::deserialize(self.de));
-        Ok(Some(value))
-    }
-
-    fn end(&mut self) -> Result<(), Error> {
-        try!(self.de.parse_whitespace());
-
-        if self.de.ch_is(b']') {
-            self.de.bump()
-        } else if self.de.eof() {
-            Err(self.de.error(ErrorCode::EOFWhileParsingList))
-        } else {
-            Err(self.de.error(ErrorCode::TrailingCharacters))
-        }
-    }
-}
-
-struct MapVisitor<'a, Iter: 'a + Iterator<Item=io::Result<u8>>> {
-    de: &'a mut Deserializer<Iter>,
-    first: bool,
-}
-
-impl<'a, Iter: Iterator<Item=io::Result<u8>>> MapVisitor<'a, Iter> {
-    fn new(de: &'a mut Deserializer<Iter>) -> Self {
-        MapVisitor {
-            de: de,
-            first: true,
-        }
-    }
-}
-
-impl<'a, Iter> de::MapVisitor for MapVisitor<'a, Iter>
-    where Iter: Iterator<Item=io::Result<u8>>
-{
-    type Error = Error;
-
-    fn visit_key<K>(&mut self) -> Result<Option<K>, Error>
-        where K: de::Deserialize,
-    {
-        try!(self.de.parse_whitespace());
-
-        if self.de.ch_is(b'}') {
-            return Ok(None);
-        }
-
-        if self.first {
-            self.first = false;
-        } else {
-            if self.de.ch_is(b',') {
-                try!(self.de.bump());
-                try!(self.de.parse_whitespace());
-            } else if self.de.eof() {
-                return Err(self.de.error(ErrorCode::EOFWhileParsingObject));
-            } else {
-                return Err(self.de.error(ErrorCode::ExpectedObjectCommaOrEnd));
-            }
-        }
-
-        if self.de.eof() {
-            return Err(self.de.error(ErrorCode::EOFWhileParsingValue));
-        }
-
-        if !self.de.ch_is(b'"') {
-            return Err(self.de.error(ErrorCode::KeyMustBeAString));
-        }
-
-        Ok(Some(try!(de::Deserialize::deserialize(self.de))))
-    }
-
-    fn visit_value<V>(&mut self) -> Result<V, Error>
-        where V: de::Deserialize,
-    {
-        try!(self.de.parse_object_colon());
-
-        Ok(try!(de::Deserialize::deserialize(self.de)))
-    }
-
-    fn end(&mut self) -> Result<(), Error> {
-        try!(self.de.parse_whitespace());
-
-        if self.de.ch_is(b'}') {
-            try!(self.de.bump());
-            Ok(())
-        } else if self.de.eof() {
-            Err(self.de.error(ErrorCode::EOFWhileParsingObject))
-        } else {
-            Err(self.de.error(ErrorCode::TrailingCharacters))
-        }
-    }
-
-    fn missing_field<V>(&mut self, _field: &'static str) -> Result<V, Error>
-        where V: de::Deserialize,
-    {
-        let mut de = de::value::ValueDeserializer::into_deserializer(());
-        Ok(try!(de::Deserialize::deserialize(&mut de)))
-    }
-}
-
-impl<Iter> de::VariantVisitor for Deserializer<Iter>
-    where Iter: Iterator<Item=io::Result<u8>>,
-{
-    type Error = Error;
-
-    fn visit_variant<V>(&mut self) -> Result<V, Error>
-        where V: de::Deserialize
-    {
-        de::Deserialize::deserialize(self)
-    }
-
-    fn visit_unit(&mut self) -> Result<(), Error> {
-        try!(self.parse_object_colon());
-
-        de::Deserialize::deserialize(self)
-    }
-
-    fn visit_seq<V>(&mut self, visitor: V) -> Result<V::Value, Error>
-        where V: de::Visitor,
-    {
-        try!(self.parse_object_colon());
-
-        de::Deserializer::visit(self, visitor)
-    }
-
-    fn visit_map<V>(&mut self, visitor: V) -> Result<V::Value, Error>
-        where V: de::Visitor,
-    {
-        try!(self.parse_object_colon());
-
-        de::Deserializer::visit(self, visitor)
-    }
-}
-
-/// Decodes a json value from a `std::io::Read`.
-pub fn from_iter<I, T>(iter: I) -> Result<T, Error>
-    where I: Iterator<Item=io::Result<u8>>,
-          T: de::Deserialize,
-{
-    let mut de = try!(Deserializer::new(iter));
-    let value = try!(de::Deserialize::deserialize(&mut de));
-
-    // Make sure the whole stream has been consumed.
-    try!(de.end());
-    Ok(value)
-}
-
-/// Decodes a json value from a `std::io::Read`.
-pub fn from_reader<R, T>(rdr: R) -> Result<T, Error>
-    where R: io::Read,
-          T: de::Deserialize,
-{
-    from_iter(rdr.bytes())
-}
-
-/// Decodes a json value from a `&str`.
-pub fn from_slice<T>(v: &[u8]) -> Result<T, Error>
-    where T: de::Deserialize
-{
-    from_iter(v.iter().map(|byte| Ok(*byte)))
-}
-
-/// Decodes a json value from a `&str`.
-pub fn from_str<T>(s: &str) -> Result<T, Error>
-    where T: de::Deserialize
-{
-    from_slice(s.as_bytes())
-}

src/json/error.rs

@@ -1,185 +0,0 @@
-use std::error;
-use std::fmt;
-use std::io;
-
-use de;
-
-/// The errors that can arise while parsing a JSON stream.
-#[derive(Clone, PartialEq)]
-pub enum ErrorCode {
-    EOFWhileParsingList,
-    EOFWhileParsingObject,
-    EOFWhileParsingString,
-    EOFWhileParsingValue,
-    ExpectedColon,
-    ExpectedConversion,
-    ExpectedEnumEnd,
-    ExpectedEnumEndToken,
-    ExpectedEnumMapStart,
-    ExpectedEnumToken,
-    ExpectedEnumVariantString,
-    ExpectedListCommaOrEnd,
-    ExpectedName,
-    ExpectedObjectCommaOrEnd,
-    ExpectedSomeIdent,
-    ExpectedSomeValue,
-    InvalidEscape,
-    InvalidNumber,
-    InvalidUnicodeCodePoint,
-    KeyMustBeAString,
-    LoneLeadingSurrogateInHexEscape,
-    UnknownField(String),
-    MissingField(&'static str),
-    NotFourDigit,
-    NotUtf8,
-    TrailingCharacters,
-    UnexpectedEndOfHexEscape,
-    UnknownVariant,
-    UnrecognizedHex,
-}
-
-impl fmt::Debug for ErrorCode {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        use std::fmt::Debug;
-
-        match *self {
-            //ErrorCode::ConversionError(ref token) => write!(f, "failed to convert {}", token),
-            ErrorCode::EOFWhileParsingList => "EOF While parsing list".fmt(f),
-            ErrorCode::EOFWhileParsingObject => "EOF While parsing object".fmt(f),
-            ErrorCode::EOFWhileParsingString => "EOF While parsing string".fmt(f),
-            ErrorCode::EOFWhileParsingValue => "EOF While parsing value".fmt(f),
-            ErrorCode::ExpectedColon => "expected `:`".fmt(f),
-            ErrorCode::ExpectedConversion => "expected conversion".fmt(f),
-            ErrorCode::ExpectedEnumEnd => "expected enum end".fmt(f),
-            ErrorCode::ExpectedEnumEndToken => "expected enum map end".fmt(f),
-            ErrorCode::ExpectedEnumMapStart => "expected enum map start".fmt(f),
-            ErrorCode::ExpectedEnumToken => "expected enum token".fmt(f),
-            ErrorCode::ExpectedEnumVariantString => "expected variant".fmt(f),
-            ErrorCode::ExpectedListCommaOrEnd => "expected `,` or `]`".fmt(f),
-            ErrorCode::ExpectedName => "expected name".fmt(f),
-            ErrorCode::ExpectedObjectCommaOrEnd => "expected `,` or `}`".fmt(f),
-            ErrorCode::ExpectedSomeIdent => "expected ident".fmt(f),
-            ErrorCode::ExpectedSomeValue => "expected value".fmt(f),
-            //ErrorCode::ExpectedTokens(ref token, tokens) => write!(f, "expected {}, found {}", tokens, token),
-            ErrorCode::InvalidEscape => "invalid escape".fmt(f),
-            ErrorCode::InvalidNumber => "invalid number".fmt(f),
-            ErrorCode::InvalidUnicodeCodePoint => "invalid unicode code point".fmt(f),
-            ErrorCode::KeyMustBeAString => "key must be a string".fmt(f),
-            ErrorCode::LoneLeadingSurrogateInHexEscape => "lone leading surrogate in hex escape".fmt(f),
-            ErrorCode::UnknownField(ref field) => write!(f, "unknown field \"{}\"", field),
-            ErrorCode::MissingField(ref field) => write!(f, "missing field \"{}\"", field),
-            ErrorCode::NotFourDigit => "invalid \\u escape (not four digits)".fmt(f),
-            ErrorCode::NotUtf8 => "contents not utf-8".fmt(f),
-            ErrorCode::TrailingCharacters => "trailing characters".fmt(f),
-            ErrorCode::UnexpectedEndOfHexEscape => "unexpected end of hex escape".fmt(f),
-            //ErrorCode::UnexpectedName(ref name) => write!(f, "unexpected name {}", name),
-            ErrorCode::UnknownVariant => "unknown variant".fmt(f),
-            ErrorCode::UnrecognizedHex => "invalid \\u escape (unrecognized hex)".fmt(f),
-        }
-    }
-}
-
-#[derive(Debug)]
-pub enum Error {
-    /// msg, line, col
-    SyntaxError(ErrorCode, usize, usize),
-    IoError(io::Error),
-    /*
-    ExpectedError(String, String),
-    */
-    MissingFieldError(&'static str),
-    /*
-    UnknownVariantError(String),
-    */
-}
-
-impl error::Error for Error {
-    fn description(&self) -> &str {
-        match *self {
-            Error::SyntaxError(..) => "syntax error",
-            Error::IoError(ref error) => error::Error::description(error),
-            /*
-            Error::ExpectedError(ref expected, _) => &expected,
-            */
-            Error::MissingFieldError(_) => "missing field",
-            /*
-            Error::UnknownVariantError(_) => "unknown variant",
-            */
-        }
-    }
-
-    fn cause(&self) -> Option<&error::Error> {
-        match *self {
-            Error::IoError(ref error) => Some(error),
-            _ => None,
-        }
-    }
-
-}
-
-impl fmt::Display for Error {
-    fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
-        match *self {
-            Error::SyntaxError(ref code, line, col) => {
-                write!(fmt, "{:?} at line {} column {}", code, line, col)
-            }
-            Error::IoError(ref error) => fmt::Display::fmt(error, fmt),
-            /*
-            Error::ExpectedError(ref expected, ref found) => {
-                Some(format!("expected {}, found {}", expected, found))
-            }
-            */
-            Error::MissingFieldError(ref field) => {
-                write!(fmt, "missing field {}", field)
-            }
-            /*
-            Error::UnknownVariantError(ref variant) => {
-                Some(format!("unknown variant {}", variant))
-            }
-            */
-        }
-    }
-}
-
-impl From<io::Error> for Error {
-    fn from(error: io::Error) -> Error {
-        Error::IoError(error)
-    }
-}
-
-impl From<de::value::Error> for Error {
-    fn from(error: de::value::Error) -> Error {
-        match error {
-            de::value::Error::SyntaxError => {
-                de::Error::syntax_error()
-            }
-            de::value::Error::EndOfStreamError => {
-                de::Error::end_of_stream_error()
-            }
-            de::value::Error::UnknownFieldError(field) => {
-                Error::SyntaxError(ErrorCode::UnknownField(field), 0, 0)
-            }
-            de::value::Error::MissingFieldError(field) => {
-                de::Error::missing_field_error(field)
-            }
-        }
-    }
-}
-
-impl de::Error for Error {
-    fn syntax_error() -> Error {
-        Error::SyntaxError(ErrorCode::ExpectedSomeValue, 0, 0)
-    }
-
-    fn end_of_stream_error() -> Error {
-        Error::SyntaxError(ErrorCode::EOFWhileParsingValue, 0, 0)
-    }
-
-    fn unknown_field_error(field: &str) -> Error {
-        Error::SyntaxError(ErrorCode::UnknownField(field.to_string()), 0, 0)
-    }
-
-    fn missing_field_error(field: &'static str) -> Error {
-        Error::MissingFieldError(field)
-    }
-}

src/json/mod.rs

@@ -1,113 +0,0 @@
-//! JSON and serialization
-//!
-//! # What is JSON?
-//!
-//! JSON (JavaScript Object Notation) is a way to write data in JavaScript.  Like XML, it allows to
-//! encode structured data in a text format that can be easily read by humans.  Its simple syntax
-//! and native compatibility with JavaScript have made it a widely used format.
-//!
-//! Data types that can be encoded are JavaScript types (see the `serde::json:Value` enum for more
-//! details):
-//!
-//! * `Boolean`: equivalent to rust's `bool`
-//! * `I64`: equivalent to rust's `i64`
-//! * `U64`: equivalent to rust's `u64`
-//! * `F64`: equivalent to rust's `i64`
-//! * `String`: equivalent to rust's `String`
-//! * `Array`: equivalent to rust's `Vec<T>`, but also allowing objects of different types in the
-//!    same array
-//! * `Object`: equivalent to rust's `BTreeMap<String, serde::json::Value>`
-//! * `Null`
-//!
-//! An object is a series of string keys mapping to values, in `"key": value` format.  Arrays are
-//! enclosed in square brackets ([ ... ]) and objects in curly brackets ({ ... }).  A simple JSON
-//! document encoding a person, his/her age, address and phone numbers could look like
-//!
-//! ```ignore
-//! {
-//!     "FirstName": "John",
-//!     "LastName": "Doe",
-//!     "Age": 43,
-//!     "Address": {
-//!         "Street": "Downing Street 10",
-//!         "City": "London",
-//!         "Country": "Great Britain"
-//!     },
-//!     "PhoneNumbers": [
-//!         "+44 1234567",
-//!         "+44 2345678"
-//!     ]
-//! }
-//! ```
-//!
-//! # Type-based Serialization and Deserialization
-//!
-//! Serde provides a mechanism for low boilerplate serialization & deserialization of values to and
-//! from JSON via the serialization API.  To be able to serialize a piece of data, it must implement
-//! the `serde::Serialize` trait.  To be able to deserialize a piece of data, it must implement the
-//! `serde::Deserialize` trait.  Serde provides provides an annotation to automatically generate
-//! the code for these traits: `#[derive(Serialize, Deserialize)]`.
-//!
-//! The JSON API also provides an enum `serde::json::Value` and a method `to_value` to serialize
-//! objects.  A `serde::json::Value` value can be serialized as a string or buffer using the
-//! functions described above.  You can also use the `json::Serializer` object, which implements the
-//! `Serializer` trait.
-//!
-//! # Examples of use
-//!
-//! ## Parsing a `str` to `Value` and reading the result
-//!
-//! ```rust
-//! //#![feature(custom_derive, plugin)]
-//! //#![plugin(serde_macros)]
-//!
-//! extern crate serde;
-//!
-//! use serde::json::{self, Value};
-//!
-//! fn main() {
-//!     let data: Value = json::from_str("{\"foo\": 13, \"bar\": \"baz\"}").unwrap();
-//!     println!("data: {:?}", data);
-//!     // data: {"bar":"baz","foo":13}
-//!     println!("object? {}", data.is_object());
-//!     // object? true
-//!
-//!     let obj = data.as_object().unwrap();
-//!     let foo = obj.get("foo").unwrap();
-//!
-//!     println!("array? {:?}", foo.as_array());
-//!     // array? None
-//!     println!("u64? {:?}", foo.as_u64());
-//!     // u64? Some(13u64)
-//!
-//!     for (key, value) in obj.iter() {
-//!         println!("{}: {}", key, match *value {
-//!             Value::U64(v) => format!("{} (u64)", v),
-//!             Value::String(ref v) => format!("{} (string)", v),
-//!             _ => format!("other")
-//!         });
-//!     }
-//!     // bar: baz (string)
-//!     // foo: 13 (u64)
-//! }
-//! ```
-
-pub use self::de::{Deserializer, from_str};
-pub use self::error::{Error, ErrorCode};
-pub use self::ser::{
-    Serializer,
-    to_writer,
-    to_writer_pretty,
-    to_vec,
-    to_vec_pretty,
-    to_string,
-    to_string_pretty,
-    escape_str,
-};
-pub use self::value::{Value, to_value, from_value};
-
-pub mod builder;
-pub mod de;
-pub mod error;
-pub mod ser;
-pub mod value;

src/json/ser.rs

@@ -1,519 +0,0 @@
-use std::io;
-use std::num::FpCategory;
-use std::string::FromUtf8Error;
-
-use ser;
-
-/// A structure for implementing serialization to JSON.
-pub struct Serializer<W, F=CompactFormatter> {
-    writer: W,
-    formatter: F,
-
-    /// `first` is used to signify if we should print a comma when we are walking through a
-    /// sequence.
-    first: bool,
-}
-
-impl<W> Serializer<W>
-    where W: io::Write,
-{
-    /// Creates a new JSON serializer.
-    #[inline]
-    pub fn new(writer: W) -> Self {
-        Serializer::with_formatter(writer, CompactFormatter)
-    }
-}
-
-impl<'a, W> Serializer<W, PrettyFormatter<'a>>
-    where W: io::Write,
-{
-    /// Creates a new JSON pretty print serializer.
-    #[inline]
-    pub fn pretty(writer: W) -> Self {
-        Serializer::with_formatter(writer, PrettyFormatter::new())
-    }
-}
-
-impl<W, F> Serializer<W, F>
-    where W: io::Write,
-          F: Formatter,
-{
-    /// Creates a new JSON visitor whose output will be written to the writer
-    /// specified.
-    #[inline]
-    pub fn with_formatter(writer: W, formatter: F) -> Self {
-        Serializer {
-            writer: writer,
-            formatter: formatter,
-            first: false,
-        }
-    }
-
-    /// Unwrap the `Writer` from the `Serializer`.
-    #[inline]
-    pub fn into_inner(self) -> W {
-        self.writer
-    }
-}
-
-impl<W, F> ser::Serializer for Serializer<W, F>
-    where W: io::Write,
-          F: Formatter,
-{
-    type Error = io::Error;
-
-    #[inline]
-    fn visit_bool(&mut self, value: bool) -> io::Result<()> {
-        if value {
-            self.writer.write_all(b"true")
-        } else {
-            self.writer.write_all(b"false")
-        }
-    }
-
-    #[inline]
-    fn visit_isize(&mut self, value: isize) -> io::Result<()> {
-        write!(&mut self.writer, "{}", value)
-    }
-
-    #[inline]
-    fn visit_i8(&mut self, value: i8) -> io::Result<()> {
-        write!(&mut self.writer, "{}", value)
-    }
-
-    #[inline]
-    fn visit_i16(&mut self, value: i16) -> io::Result<()> {
-        write!(&mut self.writer, "{}", value)
-    }
-
-    #[inline]
-    fn visit_i32(&mut self, value: i32) -> io::Result<()> {
-        write!(&mut self.writer, "{}", value)
-    }
-
-    #[inline]
-    fn visit_i64(&mut self, value: i64) -> io::Result<()> {
-        write!(&mut self.writer, "{}", value)
-    }
-
-    #[inline]
-    fn visit_usize(&mut self, value: usize) -> io::Result<()> {
-        write!(&mut self.writer, "{}", value)
-    }
-
-    #[inline]
-    fn visit_u8(&mut self, value: u8) -> io::Result<()> {
-        write!(&mut self.writer, "{}", value)
-    }
-
-    #[inline]
-    fn visit_u16(&mut self, value: u16) -> io::Result<()> {
-        write!(&mut self.writer, "{}", value)
-    }
-
-    #[inline]
-    fn visit_u32(&mut self, value: u32) -> io::Result<()> {
-        write!(&mut self.writer, "{}", value)
-    }
-
-    #[inline]
-    fn visit_u64(&mut self, value: u64) -> io::Result<()> {
-        write!(&mut self.writer, "{}", value)
-    }
-
-    #[inline]
-    fn visit_f32(&mut self, value: f32) -> io::Result<()> {
-        fmt_f32_or_null(&mut self.writer, value)
-    }
-
-    #[inline]
-    fn visit_f64(&mut self, value: f64) -> io::Result<()> {
-        fmt_f64_or_null(&mut self.writer, value)
-    }
-
-    #[inline]
-    fn visit_char(&mut self, value: char) -> io::Result<()> {
-        escape_char(&mut self.writer, value)
-    }
-
-    #[inline]
-    fn visit_str(&mut self, value: &str) -> io::Result<()> {
-        escape_str(&mut self.writer, value)
-    }
-
-    #[inline]
-    fn visit_none(&mut self) -> io::Result<()> {
-        self.visit_unit()
-    }
-
-    #[inline]
-    fn visit_some<V>(&mut self, value: V) -> io::Result<()>
-        where V: ser::Serialize
-    {
-        value.serialize(self)
-    }
-
-    #[inline]
-    fn visit_unit(&mut self) -> io::Result<()> {
-        self.writer.write_all(b"null")
-    }
-
-    #[inline]
-    fn visit_enum_unit(&mut self, _name: &str, variant: &str) -> io::Result<()> {
-        try!(self.formatter.open(&mut self.writer, b'{'));
-        try!(self.formatter.comma(&mut self.writer, true));
-        try!(self.visit_str(variant));
-        try!(self.formatter.colon(&mut self.writer));
-        try!(self.writer.write_all(b"[]"));
-        self.formatter.close(&mut self.writer, b'}')
-    }
-
-    #[inline]
-    fn visit_seq<V>(&mut self, mut visitor: V) -> io::Result<()>
-        where V: ser::SeqVisitor,
-    {
-        match visitor.len() {
-            Some(len) if len == 0 => {
-                self.writer.write_all(b"[]")
-            }
-            _ => {
-                try!(self.formatter.open(&mut self.writer, b'['));
-
-                self.first = true;
-
-                while let Some(()) = try!(visitor.visit(self)) { }
-
-                self.formatter.close(&mut self.writer, b']')
-            }
-        }
-
-    }
-
-    #[inline]
-    fn visit_enum_seq<V>(&mut self, _name: &str, variant: &str, visitor: V) -> io::Result<()>
-        where V: ser::SeqVisitor,
-    {
-        try!(self.formatter.open(&mut self.writer, b'{'));
-        try!(self.formatter.comma(&mut self.writer, true));
-        try!(self.visit_str(variant));
-        try!(self.formatter.colon(&mut self.writer));
-        try!(self.visit_seq(visitor));
-        self.formatter.close(&mut self.writer, b'}')
-    }
-
-    #[inline]
-    fn visit_seq_elt<T>(&mut self, value: T) -> io::Result<()>
-        where T: ser::Serialize,
-    {
-        try!(self.formatter.comma(&mut self.writer, self.first));
-        self.first = false;
-
-        value.serialize(self)
-    }
-
-    #[inline]
-    fn visit_map<V>(&mut self, mut visitor: V) -> io::Result<()>
-        where V: ser::MapVisitor,
-    {
-        match visitor.len() {
-            Some(len) if len == 0 => {
-                self.writer.write_all(b"{}")
-            }
-            _ => {
-                try!(self.formatter.open(&mut self.writer, b'{'));
-
-                self.first = true;
-
-                while let Some(()) = try!(visitor.visit(self)) { }
-
-                self.formatter.close(&mut self.writer, b'}')
-            }
-        }
-    }
-
-    #[inline]
-    fn visit_enum_map<V>(&mut self, _name: &str, variant: &str, visitor: V) -> io::Result<()>
-        where V: ser::MapVisitor,
-    {
-        try!(self.formatter.open(&mut self.writer, b'{'));
-        try!(self.formatter.comma(&mut self.writer, true));
-        try!(self.visit_str(variant));
-        try!(self.formatter.colon(&mut self.writer));
-        try!(self.visit_map(visitor));
-
-        self.formatter.close(&mut self.writer, b'}')
-    }
-
-    #[inline]
-    fn visit_map_elt<K, V>(&mut self, key: K, value: V) -> io::Result<()>
-        where K: ser::Serialize,
-              V: ser::Serialize,
-    {
-        try!(self.formatter.comma(&mut self.writer, self.first));
-        self.first = false;
-
-        try!(key.serialize(self));
-        try!(self.formatter.colon(&mut self.writer));
-        value.serialize(self)
-    }
-}
-
-pub trait Formatter {
-    fn open<W>(&mut self, writer: &mut W, ch: u8) -> io::Result<()>
-        where W: io::Write;
-
-    fn comma<W>(&mut self, writer: &mut W, first: bool) -> io::Result<()>
-        where W: io::Write;
-
-    fn colon<W>(&mut self, writer: &mut W) -> io::Result<()>
-        where W: io::Write;
-
-    fn close<W>(&mut self, writer: &mut W, ch: u8) -> io::Result<()>
-        where W: io::Write;
-}
-
-pub struct CompactFormatter;
-
-impl Formatter for CompactFormatter {
-    fn open<W>(&mut self, writer: &mut W, ch: u8) -> io::Result<()>
-        where W: io::Write,
-    {
-        writer.write_all(&[ch])
-    }
-
-    fn comma<W>(&mut self, writer: &mut W, first: bool) -> io::Result<()>
-        where W: io::Write,
-    {
-        if first {
-            Ok(())
-        } else {
-            writer.write_all(b",")
-        }
-    }
-
-    fn colon<W>(&mut self, writer: &mut W) -> io::Result<()>
-        where W: io::Write,
-    {
-        writer.write_all(b":")
-    }
-
-    fn close<W>(&mut self, writer: &mut W, ch: u8) -> io::Result<()>
-        where W: io::Write,
-    {
-        writer.write_all(&[ch])
-    }
-}
-
-pub struct PrettyFormatter<'a> {
-    current_indent: usize,
-    indent: &'a [u8],
-}
-
-impl<'a> PrettyFormatter<'a> {
-    fn new() -> Self {
-        PrettyFormatter::with_indent(b"  ")
-    }
-
-    fn with_indent(indent: &'a [u8]) -> Self {
-        PrettyFormatter {
-            current_indent: 0,
-            indent: indent,
-        }
-    }
-}
-
-impl<'a> Formatter for PrettyFormatter<'a> {
-    fn open<W>(&mut self, writer: &mut W, ch: u8) -> io::Result<()>
-        where W: io::Write,
-    {
-        self.current_indent += 1;
-        writer.write_all(&[ch])
-    }
-
-    fn comma<W>(&mut self, writer: &mut W, first: bool) -> io::Result<()>
-        where W: io::Write,
-    {
-        if first {
-            try!(writer.write_all(b"\n"));
-        } else {
-            try!(writer.write_all(b",\n"));
-        }
-
-        indent(writer, self.current_indent, self.indent)
-    }
-
-    fn colon<W>(&mut self, writer: &mut W) -> io::Result<()>
-        where W: io::Write,
-    {
-        writer.write_all(b": ")
-    }
-
-    fn close<W>(&mut self, writer: &mut W, ch: u8) -> io::Result<()>
-        where W: io::Write,
-    {
-        self.current_indent -= 1;
-        try!(writer.write(b"\n"));
-        try!(indent(writer, self.current_indent, self.indent));
-
-        writer.write_all(&[ch])
-    }
-}
-
-#[inline]
-pub fn escape_bytes<W>(wr: &mut W, bytes: &[u8]) -> io::Result<()>
-    where W: io::Write
-{
-    try!(wr.write_all(b"\""));
-
-    let mut start = 0;
-
-    for (i, byte) in bytes.iter().enumerate() {
-        let escaped = match *byte {
-            b'"' => b"\\\"",
-            b'\\' => b"\\\\",
-            b'\x08' => b"\\b",
-            b'\x0c' => b"\\f",
-            b'\n' => b"\\n",
-            b'\r' => b"\\r",
-            b'\t' => b"\\t",
-            _ => { continue; }
-        };
-
-        if start < i {
-            try!(wr.write_all(&bytes[start..i]));
-        }
-
-        try!(wr.write_all(escaped));
-
-        start = i + 1;
-    }
-
-    if start != bytes.len() {
-        try!(wr.write_all(&bytes[start..]));
-    }
-
-    try!(wr.write_all(b"\""));
-    Ok(())
-}
-
-#[inline]
-pub fn escape_str<W>(wr: &mut W, value: &str) -> io::Result<()>
-    where W: io::Write
-{
-    escape_bytes(wr, value.as_bytes())
-}
-
-#[inline]
-fn escape_char<W>(wr: &mut W, value: char) -> io::Result<()>
-    where W: io::Write
-{
-    // FIXME: this allocation is required in order to be compatible with stable
-    // rust, which doesn't support encoding a `char` into a stack buffer.
-    escape_bytes(wr, value.to_string().as_bytes())
-}
-
-fn fmt_f32_or_null<W>(wr: &mut W, value: f32) -> io::Result<()>
-    where W: io::Write
-{
-    match value.classify() {
-        FpCategory::Nan | FpCategory::Infinite => wr.write_all(b"null"),
-        _ => {
-            let s = format!("{:?}", value);
-            try!(wr.write_all(s.as_bytes()));
-            if !s.contains('.') {
-                try!(wr.write_all(b".0"))
-            }
-            Ok(())
-        }
-    }
-}
-
-fn fmt_f64_or_null<W>(wr: &mut W, value: f64) -> io::Result<()>
-    where W: io::Write
-{
-    match value.classify() {
-        FpCategory::Nan | FpCategory::Infinite => wr.write_all(b"null"),
-        _ => {
-            let s = format!("{:?}", value);
-            try!(wr.write_all(s.as_bytes()));
-            if !s.contains('.') {
-                try!(wr.write_all(b".0"))
-            }
-            Ok(())
-        }
-    }
-}
-
-/// Encode the specified struct into a json `[u8]` writer.
-#[inline]
-pub fn to_writer<W, T>(writer: &mut W, value: &T) -> io::Result<()>
-    where W: io::Write,
-          T: ser::Serialize,
-{
-    let mut ser = Serializer::new(writer);
-    try!(value.serialize(&mut ser));
-    Ok(())
-}
-
-/// Encode the specified struct into a json `[u8]` writer.
-#[inline]
-pub fn to_writer_pretty<W, T>(writer: &mut W, value: &T) -> io::Result<()>
-    where W: io::Write,
-          T: ser::Serialize,
-{
-    let mut ser = Serializer::pretty(writer);
-    try!(value.serialize(&mut ser));
-    Ok(())
-}
-
-/// Encode the specified struct into a json `[u8]` buffer.
-#[inline]
-pub fn to_vec<T>(value: &T) -> Vec<u8>
-    where T: ser::Serialize,
-{
-    // We are writing to a Vec, which doesn't fail. So we can ignore
-    // the error.
-    let mut writer = Vec::with_capacity(128);
-    to_writer(&mut writer, value).unwrap();
-    writer
-}
-
-/// Encode the specified struct into a json `[u8]` buffer.
-#[inline]
-pub fn to_vec_pretty<T>(value: &T) -> Vec<u8>
-    where T: ser::Serialize,
-{
-    // We are writing to a Vec, which doesn't fail. So we can ignore
-    // the error.
-    let mut writer = Vec::with_capacity(128);
-    to_writer_pretty(&mut writer, value).unwrap();
-    writer
-}
-
-/// Encode the specified struct into a json `String` buffer.
-#[inline]
-pub fn to_string<T>(value: &T) -> Result<String, FromUtf8Error>
-    where T: ser::Serialize
-{
-    let vec = to_vec(value);
-    String::from_utf8(vec)
-}
-
-/// Encode the specified struct into a json `String` buffer.
-#[inline]
-pub fn to_string_pretty<T>(value: &T) -> Result<String, FromUtf8Error>
-    where T: ser::Serialize
-{
-    let vec = to_vec_pretty(value);
-    String::from_utf8(vec)
-}
-
-fn indent<W>(wr: &mut W, n: usize, s: &[u8]) -> io::Result<()>
-    where W: io::Write,
-{
-    for _ in 0 .. n {
-        try!(wr.write_all(s));
-    }
-
-    Ok(())
-}

src/json/value.rs

@@ -1,883 +0,0 @@
-use std::collections::{BTreeMap, btree_map};
-use std::fmt;
-use std::io;
-use std::str;
-use std::vec;
-
-use num::NumCast;
-
-use de;
-use ser;
-use super::error::Error;
-
-#[derive(Clone, PartialEq)]
-pub enum Value {
-    Null,
-    Bool(bool),
-    I64(i64),
-    U64(u64),
-    F64(f64),
-    String(String),
-    Array(Vec<Value>),
-    Object(BTreeMap<String, Value>),
-}
-
-impl Value {
-    /// If the `Value` is an Object, returns the value associated with the provided key.
-    /// Otherwise, returns None.
-    pub fn find<'a>(&'a self, key: &str) -> Option<&'a Value>{
-        match self {
-            &Value::Object(ref map) => map.get(key),
-            _ => None
-        }
-    }
-
-    /// Attempts to get a nested Value Object for each key in `keys`.
-    /// If any key is found not to exist, find_path will return None.
-    /// Otherwise, it will return the `Value` associated with the final key.
-    pub fn find_path<'a>(&'a self, keys: &[&str]) -> Option<&'a Value>{
-        let mut target = self;
-        for key in keys.iter() {
-            match target.find(*key) {
-                Some(t) => { target = t; },
-                None => return None
-            }
-        }
-        Some(target)
-    }
-
-    /// If the `Value` is an Object, performs a depth-first search until
-    /// a value associated with the provided key is found. If no value is found
-    /// or the `Value` is not an Object, returns None.
-    pub fn search<'a>(&'a self, key: &str) -> Option<&'a Value> {
-        match self {
-            &Value::Object(ref map) => {
-                match map.get(key) {
-                    Some(json_value) => Some(json_value),
-                    None => {
-                        for (_, v) in map.iter() {
-                            match v.search(key) {
-                                x if x.is_some() => return x,
-                                _ => ()
-                            }
-                        }
-                        None
-                    }
-                }
-            },
-            _ => None
-        }
-    }
-
-    /// Returns true if the `Value` is an Object. Returns false otherwise.
-    pub fn is_object<'a>(&'a self) -> bool {
-        self.as_object().is_some()
-    }
-
-    /// If the `Value` is an Object, returns the associated BTreeMap.
-    /// Returns None otherwise.
-    pub fn as_object<'a>(&'a self) -> Option<&'a BTreeMap<String, Value>> {
-        match self {
-            &Value::Object(ref map) => Some(map),
-            _ => None
-        }
-    }
-
-    /// If the `Value` is an Object, returns the associated mutable BTreeMap.
-    /// Returns None otherwise.
-    pub fn as_object_mut<'a>(&'a mut self) -> Option<&'a mut BTreeMap<String, Value>> {
-        match self {
-            &mut Value::Object(ref mut map) => Some(map),
-            _ => None
-        }
-    }
-
-    /// Returns true if the `Value` is an Array. Returns false otherwise.
-    pub fn is_array<'a>(&'a self) -> bool {
-        self.as_array().is_some()
-    }
-
-    /// If the `Value` is an Array, returns the associated vector.
-    /// Returns None otherwise.
-    pub fn as_array<'a>(&'a self) -> Option<&'a Vec<Value>> {
-        match self {
-            &Value::Array(ref array) => Some(&*array),
-            _ => None
-        }
-    }
-
-    /// If the `Value` is an Array, returns the associated mutable vector.
-    /// Returns None otherwise.
-    pub fn as_array_mut<'a>(&'a mut self) -> Option<&'a mut Vec<Value>> {
-        match self {
-            &mut Value::Array(ref mut list) => Some(list),
-            _ => None
-        }
-    }
-
-    /// Returns true if the `Value` is a String. Returns false otherwise.
-    pub fn is_string<'a>(&'a self) -> bool {
-        self.as_string().is_some()
-    }
-
-    /// If the `Value` is a String, returns the associated str.
-    /// Returns None otherwise.
-    pub fn as_string<'a>(&'a self) -> Option<&'a str> {
-        match *self {
-            Value::String(ref s) => Some(&s),
-            _ => None
-        }
-    }
-
-    /// Returns true if the `Value` is a Number. Returns false otherwise.
-    pub fn is_number(&self) -> bool {
-        match *self {
-            Value::I64(_) | Value::U64(_) | Value::F64(_) => true,
-            _ => false,
-        }
-    }
-
-    /// Returns true if the `Value` is a i64. Returns false otherwise.
-    pub fn is_i64(&self) -> bool {
-        match *self {
-            Value::I64(_) => true,
-            _ => false,
-        }
-    }
-
-    /// Returns true if the `Value` is a u64. Returns false otherwise.
-    pub fn is_u64(&self) -> bool {
-        match *self {
-            Value::U64(_) => true,
-            _ => false,
-        }
-    }
-
-    /// Returns true if the `Value` is a f64. Returns false otherwise.
-    pub fn is_f64(&self) -> bool {
-        match *self {
-            Value::F64(_) => true,
-            _ => false,
-        }
-    }
-
-    /// If the `Value` is a number, return or cast it to a i64.
-    /// Returns None otherwise.
-    pub fn as_i64(&self) -> Option<i64> {
-        match *self {
-            Value::I64(n) => Some(n),
-            Value::U64(n) => NumCast::from(n),
-            _ => None
-        }
-    }
-
-    /// If the `Value` is a number, return or cast it to a u64.
-    /// Returns None otherwise.
-    pub fn as_u64(&self) -> Option<u64> {
-        match *self {
-            Value::I64(n) => NumCast::from(n),
-            Value::U64(n) => Some(n),
-            _ => None
-        }
-    }
-
-    /// If the `Value` is a number, return or cast it to a f64.
-    /// Returns None otherwise.
-    pub fn as_f64(&self) -> Option<f64> {
-        match *self {
-            Value::I64(n) => NumCast::from(n),
-            Value::U64(n) => NumCast::from(n),
-            Value::F64(n) => Some(n),
-            _ => None
-        }
-    }
-
-    /// Returns true if the `Value` is a Boolean. Returns false otherwise.
-    pub fn is_boolean(&self) -> bool {
-        self.as_boolean().is_some()
-    }
-
-    /// If the `Value` is a Boolean, returns the associated bool.
-    /// Returns None otherwise.
-    pub fn as_boolean(&self) -> Option<bool> {
-        match self {
-            &Value::Bool(b) => Some(b),
-            _ => None
-        }
-    }
-
-    /// Returns true if the `Value` is a Null. Returns false otherwise.
-    pub fn is_null(&self) -> bool {
-        self.as_null().is_some()
-    }
-
-    /// If the `Value` is a Null, returns ().
-    /// Returns None otherwise.
-    pub fn as_null(&self) -> Option<()> {
-        match self {
-            &Value::Null => Some(()),
-            _ => None
-        }
-    }
-}
-
-impl ser::Serialize for Value {
-    #[inline]
-    fn serialize<S>(&self, serializer: &mut S) -> Result<(), S::Error>
-        where S: ser::Serializer,
-    {
-        match *self {
-            Value::Null => serializer.visit_unit(),
-            Value::Bool(v) => serializer.visit_bool(v),
-            Value::I64(v) => serializer.visit_i64(v),
-            Value::U64(v) => serializer.visit_u64(v),
-            Value::F64(v) => serializer.visit_f64(v),
-            Value::String(ref v) => serializer.visit_str(&v),
-            Value::Array(ref v) => v.serialize(serializer),
-            Value::Object(ref v) => v.serialize(serializer),
-        }
-    }
-}
-
-impl de::Deserialize for Value {
-    #[inline]
-    fn deserialize<D>(deserializer: &mut D) -> Result<Value, D::Error>
-        where D: de::Deserializer,
-    {
-        struct ValueVisitor;
-
-        impl de::Visitor for ValueVisitor {
-            type Value = Value;
-
-            #[inline]
-            fn visit_bool<E>(&mut self, value: bool) -> Result<Value, E> {
-                Ok(Value::Bool(value))
-            }
-
-            #[inline]
-            fn visit_i64<E>(&mut self, value: i64) -> Result<Value, E> {
-                if value < 0 {
-                    Ok(Value::I64(value))
-                } else {
-                    Ok(Value::U64(value as u64))
-                }
-            }
-
-            #[inline]
-            fn visit_u64<E>(&mut self, value: u64) -> Result<Value, E> {
-                Ok(Value::U64(value))
-            }
-
-            #[inline]
-            fn visit_f64<E>(&mut self, value: f64) -> Result<Value, E> {
-                Ok(Value::F64(value))
-            }
-
-            #[inline]
-            fn visit_str<E>(&mut self, value: &str) -> Result<Value, E>
-                where E: de::Error,
-            {
-                self.visit_string(value.to_string())
-            }
-
-            #[inline]
-            fn visit_string<E>(&mut self, value: String) -> Result<Value, E> {
-                Ok(Value::String(value))
-            }
-
-            #[inline]
-            fn visit_none<E>(&mut self) -> Result<Value, E> {
-                Ok(Value::Null)
-            }
-
-            #[inline]
-            fn visit_some<D>(&mut self, deserializer: &mut D) -> Result<Value, D::Error>
-                where D: de::Deserializer,
-            {
-                de::Deserialize::deserialize(deserializer)
-            }
-
-            #[inline]
-            fn visit_unit<E>(&mut self) -> Result<Value, E> {
-                Ok(Value::Null)
-            }
-
-            #[inline]
-            fn visit_seq<V>(&mut self, visitor: V) -> Result<Value, V::Error>
-                where V: de::SeqVisitor,
-            {
-                let values = try!(de::impls::VecVisitor::new().visit_seq(visitor));
-                Ok(Value::Array(values))
-            }
-
-            #[inline]
-            fn visit_map<V>(&mut self, visitor: V) -> Result<Value, V::Error>
-                where V: de::MapVisitor,
-            {
-                let values = try!(de::impls::BTreeMapVisitor::new().visit_map(visitor));
-                Ok(Value::Object(values))
-            }
-        }
-
-        deserializer.visit(ValueVisitor)
-    }
-}
-
-struct WriterFormatter<'a, 'b: 'a> {
-    inner: &'a mut fmt::Formatter<'b>,
-}
-
-impl<'a, 'b> io::Write for WriterFormatter<'a, 'b> {
-    fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
-        match self.inner.write_str(str::from_utf8(buf).unwrap()) {
-            Ok(_) => Ok(buf.len()),
-            Err(_) => Err(io::Error::last_os_error()),
-        }
-    }
-
-    fn flush(&mut self) -> io::Result<()> {
-        Ok(())
-    }
-}
-
-impl fmt::Debug for Value {
-    /// Serializes a json value into a string
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        let mut wr = WriterFormatter { inner: f };
-        super::ser::to_writer(&mut wr, self).map_err(|_| fmt::Error)
-    }
-}
-
-#[derive(Debug)]
-enum State {
-    Value(Value),
-    Array(Vec<Value>),
-    Object(BTreeMap<String, Value>),
-}
-
-pub struct Serializer {
-    state: Vec<State>,
-}
-
-impl Serializer {
-    pub fn new() -> Serializer {
-        Serializer {
-            state: Vec::with_capacity(4),
-        }
-    }
-
-    pub fn unwrap(mut self) -> Value {
-        match self.state.pop().unwrap() {
-            State::Value(value) => value,
-            state => panic!("expected value, found {:?}", state),
-        }
-    }
-}
-
-impl ser::Serializer for Serializer {
-    type Error = ();
-
-    #[inline]
-    fn visit_bool(&mut self, value: bool) -> Result<(), ()> {
-        self.state.push(State::Value(Value::Bool(value)));
-        Ok(())
-    }
-
-    #[inline]
-    fn visit_i64(&mut self, value: i64) -> Result<(), ()> {
-        if value < 0 {
-            self.state.push(State::Value(Value::I64(value)));
-        } else {
-            self.state.push(State::Value(Value::U64(value as u64)));
-        }
-        Ok(())
-    }
-
-    #[inline]
-    fn visit_u64(&mut self, value: u64) -> Result<(), ()> {
-        self.state.push(State::Value(Value::U64(value)));
-        Ok(())
-    }
-
-    #[inline]
-    fn visit_f64(&mut self, value: f64) -> Result<(), ()> {
-        self.state.push(State::Value(Value::F64(value as f64)));
-        Ok(())
-    }
-
-    #[inline]
-    fn visit_char(&mut self, value: char) -> Result<(), ()> {
-        self.state.push(State::Value(Value::String(value.to_string())));
-        Ok(())
-    }
-
-    #[inline]
-    fn visit_str(&mut self, value: &str) -> Result<(), ()> {
-        self.state.push(State::Value(Value::String(value.to_string())));
-        Ok(())
-    }
-
-    #[inline]
-    fn visit_none(&mut self) -> Result<(), ()> {
-        self.visit_unit()
-    }
-
-    #[inline]
-    fn visit_some<V>(&mut self, value: V) -> Result<(), ()>
-        where V: ser::Serialize,
-    {
-        value.serialize(self)
-    }
-
-    #[inline]
-    fn visit_unit(&mut self) -> Result<(), ()> {
-        self.state.push(State::Value(Value::Null));
-        Ok(())
-    }
-
-    #[inline]
-    fn visit_enum_unit(&mut self, _name: &str, variant: &str) -> Result<(), ()> {
-        let mut values = BTreeMap::new();
-        values.insert(variant.to_string(), Value::Array(vec![]));
-
-        self.state.push(State::Value(Value::Object(values)));
-
-        Ok(())
-    }
-
-    #[inline]
-    fn visit_seq<V>(&mut self, mut visitor: V) -> Result<(), ()>
-        where V: ser::SeqVisitor,
-    {
-        let len = visitor.len().unwrap_or(0);
-        let values = Vec::with_capacity(len);
-
-        self.state.push(State::Array(values));
-
-        while let Some(()) = try!(visitor.visit(self)) { }
-
-        let values = match self.state.pop().unwrap() {
-            State::Array(values) => values,
-            state => panic!("Expected array, found {:?}", state),
-        };
-
-        self.state.push(State::Value(Value::Array(values)));
-
-        Ok(())
-    }
-
-    #[inline]
-    fn visit_enum_seq<V>(&mut self, _name: &str, variant: &str, visitor: V) -> Result<(), ()>
-        where V: ser::SeqVisitor,
-    {
-        try!(self.visit_seq(visitor));
-
-        let value = match self.state.pop().unwrap() {
-            State::Value(value) => value,
-            state => panic!("expected value, found {:?}", state),
-        };
-
-        let mut object = BTreeMap::new();
-
-        object.insert(variant.to_string(), value);
-
-        self.state.push(State::Value(Value::Object(object)));
-
-        Ok(())
-    }
-
-    #[inline]
-    fn visit_seq_elt<T>(&mut self, value: T) -> Result<(), ()>
-        where T: ser::Serialize,
-    {
-        try!(value.serialize(self));
-
-        let value = match self.state.pop().unwrap() {
-            State::Value(value) => value,
-            state => panic!("expected value, found {:?}", state),
-        };
-
-        match *self.state.last_mut().unwrap() {
-            State::Array(ref mut values) => { values.push(value); }
-            ref state => panic!("expected array, found {:?}", state),
-        }
-
-        Ok(())
-    }
-
-    #[inline]
-    fn visit_map<V>(&mut self, mut visitor: V) -> Result<(), ()>
-        where V: ser::MapVisitor,
-    {
-        let values = BTreeMap::new();
-
-        self.state.push(State::Object(values));
-
-        while let Some(()) = try!(visitor.visit(self)) { }
-
-        let values = match self.state.pop().unwrap() {
-            State::Object(values) => values,
-            state => panic!("expected object, found {:?}", state),
-        };
-
-        self.state.push(State::Value(Value::Object(values)));
-
-        Ok(())
-    }
-
-    #[inline]
-    fn visit_enum_map<V>(&mut self, _name: &str, variant: &str, visitor: V) -> Result<(), ()>
-        where V: ser::MapVisitor,
-    {
-        try!(self.visit_map(visitor));
-
-        let value = match self.state.pop().unwrap() {
-            State::Value(value) => value,
-            state => panic!("expected value, found {:?}", state),
-        };
-
-        let mut object = BTreeMap::new();
-
-        object.insert(variant.to_string(), value);
-
-        self.state.push(State::Value(Value::Object(object)));
-
-        Ok(())
-    }
-
-    #[inline]
-    fn visit_map_elt<K, V>(&mut self, key: K, value: V) -> Result<(), ()>
-        where K: ser::Serialize,
-              V: ser::Serialize,
-    {
-        try!(key.serialize(self));
-
-        let key = match self.state.pop().unwrap() {
-            State::Value(Value::String(value)) => value,
-            state => panic!("expected key, found {:?}", state),
-        };
-
-        try!(value.serialize(self));
-
-        let value = match self.state.pop().unwrap() {
-            State::Value(value) => value,
-            state => panic!("expected value, found {:?}", state),
-        };
-
-        match *self.state.last_mut().unwrap() {
-            State::Object(ref mut values) => { values.insert(key, value); }
-            ref state => panic!("expected object, found {:?}", state),
-        }
-
-        Ok(())
-    }
-}
-
-pub struct Deserializer {
-    value: Option<Value>,
-}
-
-impl Deserializer {
-    /// Creates a new deserializer instance for deserializing the specified JSON value.
-    pub fn new(value: Value) -> Deserializer {
-        Deserializer {
-            value: Some(value),
-        }
-    }
-}
-
-impl de::Deserializer for Deserializer {
-    type Error = Error;
-
-    #[inline]
-    fn visit<V>(&mut self, mut visitor: V) -> Result<V::Value, Error>
-        where V: de::Visitor,
-    {
-        let value = match self.value.take() {
-            Some(value) => value,
-            None => { return Err(de::Error::end_of_stream_error()); }
-        };
-
-        match value {
-            Value::Null => visitor.visit_unit(),
-            Value::Bool(v) => visitor.visit_bool(v),
-            Value::I64(v) => visitor.visit_i64(v),
-            Value::U64(v) => visitor.visit_u64(v),
-            Value::F64(v) => visitor.visit_f64(v),
-            Value::String(v) => visitor.visit_string(v),
-            Value::Array(v) => {
-                let len = v.len();
-                visitor.visit_seq(SeqDeserializer {
-                    de: self,
-                    iter: v.into_iter(),
-                    len: len,
-                })
-            }
-            Value::Object(v) => {
-                let len = v.len();
-                visitor.visit_map(MapDeserializer {
-                    de: self,
-                    iter: v.into_iter(),
-                    value: None,
-                    len: len,
-                })
-            }
-        }
-    }
-
-    #[inline]
-    fn visit_option<V>(&mut self, mut visitor: V) -> Result<V::Value, Error>
-        where V: de::Visitor,
-    {
-        match self.value {
-            Some(Value::Null) => visitor.visit_none(),
-            Some(_) => visitor.visit_some(self),
-            None => Err(de::Error::end_of_stream_error()),
-        }
-    }
-
-    #[inline]
-    fn visit_enum<V>(&mut self, _name: &str, mut visitor: V) -> Result<V::Value, Error>
-        where V: de::EnumVisitor,
-    {
-        let value = match self.value.take() {
-            Some(Value::Object(value)) => value,
-            Some(_) => { return Err(de::Error::syntax_error()); }
-            None => { return Err(de::Error::end_of_stream_error()); }
-        };
-
-        let mut iter = value.into_iter();
-
-        let value = match iter.next() {
-            Some((variant, Value::Array(fields))) => {
-                self.value = Some(Value::String(variant));
-
-                let len = fields.len();
-                try!(visitor.visit(SeqDeserializer {
-                    de: self,
-                    iter: fields.into_iter(),
-                    len: len,
-                }))
-            }
-            Some((variant, Value::Object(fields))) => {
-                let len = fields.len();
-                try!(visitor.visit(MapDeserializer {
-                    de: self,
-                    iter: fields.into_iter(),
-                    value: Some(Value::String(variant)),
-                    len: len,
-                }))
-            }
-            Some(_) => { return Err(de::Error::syntax_error()); }
-            None => { return Err(de::Error::syntax_error()); }
-        };
-
-        match iter.next() {
-            Some(_) => Err(de::Error::syntax_error()),
-            None => Ok(value)
-        }
-    }
-}
-
-struct SeqDeserializer<'a> {
-    de: &'a mut Deserializer,
-    iter: vec::IntoIter<Value>,
-    len: usize,
-}
-
-impl<'a> de::Deserializer for SeqDeserializer<'a> {
-    type Error = Error;
-
-    #[inline]
-    fn visit<V>(&mut self, mut visitor: V) -> Result<V::Value, Error>
-        where V: de::Visitor,
-    {
-        if self.len == 0 {
-            visitor.visit_unit()
-        } else {
-            visitor.visit_seq(self)
-        }
-    }
-}
-
-impl<'a> de::SeqVisitor for SeqDeserializer<'a> {
-    type Error = Error;
-
-    fn visit<T>(&mut self) -> Result<Option<T>, Error>
-        where T: de::Deserialize
-    {
-        match self.iter.next() {
-            Some(value) => {
-                self.len -= 1;
-                self.de.value = Some(value);
-                Ok(Some(try!(de::Deserialize::deserialize(self.de))))
-            }
-            None => Ok(None),
-        }
-    }
-
-    fn end(&mut self) -> Result<(), Error> {
-        if self.len == 0 {
-            Ok(())
-        } else {
-            Err(de::Error::end_of_stream_error())
-        }
-    }
-
-    fn size_hint(&self) -> (usize, Option<usize>) {
-        (self.len, Some(self.len))
-    }
-}
-
-impl<'a> de::VariantVisitor for SeqDeserializer<'a> {
-    type Error = Error;
-
-    fn visit_variant<V>(&mut self) -> Result<V, Error>
-        where V: de::Deserialize,
-    {
-        de::Deserialize::deserialize(self.de)
-    }
-
-    fn visit_unit(&mut self) -> Result<(), Error>
-    {
-        de::Deserialize::deserialize(self)
-    }
-
-    fn visit_seq<V>(&mut self, visitor: V) -> Result<V::Value, Error>
-        where V: de::Visitor,
-    {
-        de::Deserializer::visit(self, visitor)
-    }
-
-    fn visit_map<V>(&mut self, visitor: V) -> Result<V::Value, Error>
-        where V: de::Visitor,
-    {
-        de::Deserializer::visit(self, visitor)
-    }
-}
-
-struct MapDeserializer<'a> {
-    de: &'a mut Deserializer,
-    iter: btree_map::IntoIter<String, Value>,
-    value: Option<Value>,
-    len: usize,
-}
-
-impl<'a> de::MapVisitor for MapDeserializer<'a> {
-    type Error = Error;
-
-    fn visit_key<T>(&mut self) -> Result<Option<T>, Error>
-        where T: de::Deserialize
-    {
-        match self.iter.next() {
-            Some((key, value)) => {
-                self.len -= 1;
-                self.value = Some(value);
-                self.de.value = Some(Value::String(key));
-                Ok(Some(try!(de::Deserialize::deserialize(self.de))))
-            }
-            None => Ok(None),
-        }
-    }
-
-    fn visit_value<T>(&mut self) -> Result<T, Error>
-        where T: de::Deserialize
-    {
-        let value = self.value.take().unwrap();
-        self.de.value = Some(value);
-        Ok(try!(de::Deserialize::deserialize(self.de)))
-    }
-
-    fn end(&mut self) -> Result<(), Error> {
-        if self.len == 0 {
-            Ok(())
-        } else {
-            Err(de::Error::end_of_stream_error())
-        }
-    }
-
-    fn missing_field<V>(&mut self, _field: &'static str) -> Result<V, Error>
-        where V: de::Deserialize,
-    {
-        // See if the type can deserialize from a unit.
-        struct UnitDeserializer;
-
-        impl de::Deserializer for UnitDeserializer {
-            type Error = Error;
-
-            fn visit<V>(&mut self, mut visitor: V) -> Result<V::Value, Error>
-                where V: de::Visitor,
-            {
-                visitor.visit_unit()
-            }
-
-            fn visit_option<V>(&mut self, mut visitor: V) -> Result<V::Value, Error>
-                where V: de::Visitor,
-            {
-                visitor.visit_none()
-            }
-        }
-
-        Ok(try!(de::Deserialize::deserialize(&mut UnitDeserializer)))
-    }
-
-    fn size_hint(&self) -> (usize, Option<usize>) {
-        (self.len, Some(self.len))
-    }
-}
-
-impl<'a> de::Deserializer for MapDeserializer<'a> {
-    type Error = Error;
-
-    #[inline]
-    fn visit<V>(&mut self, mut visitor: V) -> Result<V::Value, Error>
-        where V: de::Visitor,
-    {
-        println!("MapDeserializer!");
-        visitor.visit_map(self)
-    }
-}
-
-impl<'a> de::VariantVisitor for MapDeserializer<'a> {
-    type Error = Error;
-
-    fn visit_variant<V>(&mut self) -> Result<V, Error>
-        where V: de::Deserialize,
-    {
-        self.de.value = self.value.take();
-        de::Deserialize::deserialize(self.de)
-    }
-
-    fn visit_unit(&mut self) -> Result<(), Error> {
-        de::Deserialize::deserialize(self)
-    }
-
-    fn visit_seq<V>(&mut self, visitor: V) -> Result<V::Value, Error>
-        where V: de::Visitor,
-    {
-        de::Deserializer::visit(self, visitor)
-    }
-
-    fn visit_map<V>(&mut self, visitor: V) -> Result<V::Value, Error>
-        where V: de::Visitor,
-    {
-        de::Deserializer::visit(self, visitor)
-    }
-}
-
-/// Shortcut function to encode a `T` into a JSON `Value`
-pub fn to_value<T>(value: &T) -> Value
-    where T: ser::Serialize
-{
-    let mut ser = Serializer::new();
-    value.serialize(&mut ser).ok().unwrap();
-    ser.unwrap()
-}
-
-/// Shortcut function to decode a JSON `Value` into a `T`
-pub fn from_value<T>(value: Value) -> Result<T, Error>
-    where T: de::Deserialize
-{
-    let mut de = Deserializer::new(value);
-    de::Deserialize::deserialize(&mut de)
-}

src/lib.rs

@@ -1,19 +0,0 @@
-//! Serde Serialization Framework
-//!
-//! Serde is a powerful framework that enables serialization libraries to generically serialize
-//! Rust data structures without the overhead of runtime type information. In many situations, the
-//! handshake protocol between serializers and serializees can be completely optimized away,
-//! leaving serde to perform roughly the same speed as a hand written serializer for a specific
-//! type.
-#![doc(html_root_url="http://erickt.github.io/rust-serde")]
-
-extern crate num;
-
-pub use ser::{Serialize, Serializer};
-pub use de::{Deserialize, Deserializer, Error};
-
-pub mod bytes;
-pub mod de;
-pub mod iter;
-pub mod json;
-pub mod ser;