Version bump

.gitignore

@@ -1,3 +1,2 @@
-Cargo.lock
 target
-*.sw[po]
+Cargo.lock

.travis.yml

@@ -1,17 +1,34 @@
-sudo: false
 language: rust
-cache: cargo
-
-# run builds for all the trains (and more)
 rust:
-  - 1.13.0
   - stable
   - beta
   - nightly
-
+env:
+  global:
+    secure: HO41LMpMXkF2In9+1sxWVu7fgolL+y9+4Q5PI6wZX2L5pDwpPJCjxaQarQXCEnoIxED1PlP03JuF7ULNz0zw1ylYhAOfOSdkxFZRnE2wMZqq6qvXBHwyMiDrAociIzoPKSGv7JVrKPsjsnd+96K6xxueIodQZrmAdyq7N/M82Mc=
+  matrix:
+    - CRATE=serde_tests TARGET=test
 matrix:
   include:
     - rust: nightly
-      env: CLIPPY=true
-
-script: ./travis.sh
+      env: CRATE=serde_macros TARGET=test
+    - rust: nightly
+      env: CRATE=serde_macros TARGET=bench
+    - rust: nightly
+      env: CRATE=serde_tests TARGET=bench
+script:
+  - (cd $CRATE && cargo $TARGET)
+after_success: |
+  [ $TRAVIS_BRANCH = "master" ] &&
+  [ $TRAVIS_PULL_REQUEST  = false ] &&
+  mkdir -p target/doc &&
+  (cd serde && cargo doc --no-deps) &&
+  (cd serde_codegen && cargo doc --no-deps) &&
+  (cd serde_macros && cargo doc --no-deps) &&
+  cp -r serde/target/doc target/doc/serde &&
+  cp -r serde_codegen/target/doc target/doc/serde_codegen &&
+  cp -r serde_macros/target/doc target/doc/serde_macros &&
+  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

CONTRIBUTING.md

@@ -1,45 +0,0 @@
-# Contributing to Serde
-
-Serde welcomes contribution from everyone. Here are the guidelines if you are
-thinking of helping us:
-
-## Contributions
-
-Contributions to Serde or its dependencies should be made in the form of GitHub
-pull requests. Each pull request will be reviewed by a core contributor
-(someone with permission to land patches) and either landed in the main tree or
-given feedback for changes that would be required. All contributions should
-follow this format, even those from core contributors.
-
-Should you wish to work on an issue, please claim it first by commenting on
-the GitHub issue that you want to work on it. This is to prevent duplicated
-efforts from contributors on the same issue.
-
-## Pull Request Checklist
-
-- Branch from the master branch and, if needed, rebase to the current master
-  branch before submitting your pull request. If it doesn't merge cleanly with
-  master you may be asked to rebase your changes.
-
-- Commits should be as small as possible, while ensuring that each commit is
-  correct independently (i.e., each commit should compile and pass tests). 
-
-- If your patch is not getting reviewed or you need a specific person to review
-  it, you can @-reply a reviewer asking for a review in the pull request or a
-  comment, or you can ask for a review in `#serde` on `irc.mozilla.org`.
-
-- Add tests relevant to the fixed bug or new feature.
-
-## Conduct
-
-In all Serde-related forums, we follow the [Rust Code of
-Conduct](https://www.rust-lang.org/conduct.html).  For escalation or moderation
-issues, please contact Erick (erick.tryzelaar@gmail.com) instead of the Rust
-moderation team.
-
-## Communication
-
-Beyond opening tickets on the
-[serde-rs/serde](https://github.com/serde-rs/serde) project, Serde contributors
-frequent the `#serde` channel on
-[`irc.mozilla.org`](https://wiki.mozilla.org/IRC).

Cargo.toml

@@ -1,9 +0,0 @@
-[workspace]
-members = [
-    "serde",
-    "serde_codegen_internals",
-    "serde_derive",
-    "serde_test",
-    "test_suite",
-    "test_suite/no_std",
-]

LICENSE

@@ -0,0 +1,33 @@
+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.
+

README.md

@@ -1,71 +1,424 @@
-# Serde   [![Build Status](https://api.travis-ci.org/serde-rs/serde.svg?branch=master)](https://travis-ci.org/serde-rs/serde) [![Latest Version](https://img.shields.io/crates/v/serde.svg)](https://crates.io/crates/serde)
+Serde Rust Serialization Framework
+==================================
 
-**Serde is a framework for *ser*ializing and *de*serializing Rust data structures efficiently and generically.**
+[![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)
 
----
+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.
 
-You may be looking for:
+Documentation is available at http://serde-rs.github.io/serde/serde
 
-- [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/codegen.html)
-- [Examples](https://serde.rs/examples.html)
-- [API documentation](https://docs.serde.rs/serde/)
-- [Release notes](https://github.com/serde-rs/serde/releases)
+Making a Type Serializable
+==========================
 
-## Serde in action
+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:
 
 ```rust
-#[macro_use]
-extern crate serde_derive;
+#![feature(custom_derive, plugin)]
+#![plugin(serde_macros)]
 
-extern crate serde_json;
+extern crate serde;
 
-#[derive(Serialize, Deserialize, Debug)]
+...
+
+#[derive(Serialize, Deserialize)]
+struct Point {
+    x: i32,
+    y: i32,
+}
+```
+
+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:
+
+```rust
+use serde::json;
+
+...
+
+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
 struct Point {
     x: i32,
     y: i32,
 }
 
-fn main() {
-    let point = Point { x: 1, y: 2 };
+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,
+        })
+    }
+}
 
-    // Convert the Point to a JSON string.
-    let serialized = serde_json::to_string(&point).unwrap();
+struct PointMapVisitor<'a> {
+    value: &'a Point,
+    state: u8,
+}
 
-    // 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);
+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)
+            }
+        }
+    }
 }
 ```
 
-## Getting help
+Deserialization without Macros
+==============================
 
-Serde developers live in the #serde channel on
-[`irc.mozilla.org`](https://wiki.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](https://github.com/serde-rs/serde/issues/new)
-as well.
+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:
 
-## License
+```rust
+impl Deserialize for i32 {
+    fn deserialize<D>(deserializer: &mut D) -> Result<i32, D::Error>
+        where D: serde::Deserializer,
+    {
+        deserializer.visit(I32Visitor)
+    }
+}
 
-Serde is licensed under either of
+struct I32Visitor;
 
- * Apache License, Version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
-   http://www.apache.org/licenses/LICENSE-2.0)
- * MIT license ([LICENSE-MIT](LICENSE-MIT) or
-   http://opensource.org/licenses/MIT)
+impl serde::de::Visitor for I32Visitor {
+    type Value = i32;
 
-at your option.
+    fn visit_i16<E>(&mut self, value: i16) -> Result<i16, E>
+        where E: Error,
+    {
+        self.visit_i32(value as i32)
+    }
 
-### Contribution
+    fn visit_i32<E>(&mut self, value: i32) -> Result<i32, E>
+        where E: Error,
+    {
+        Ok(value)
+    }
 
-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.
+    ...
+
+```
+
+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 })
+    }
+}
+```

serde/Cargo.toml

@@ -1,34 +1,13 @@
 [package]
 name = "serde"
-version = "0.9.7"
+version = "0.4.2"
 authors = ["Erick Tryzelaar <erick.tryzelaar@gmail.com>"]
 license = "MIT/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/"
+documentation = "http://serde-rs.github.io/serde/serde"
 readme = "../README.md"
-keywords = ["serde", "serialization", "no_std"]
-categories = ["encoding"]
-include = ["Cargo.toml", "src/**/*.rs"]
-
-[badges]
-travis-ci = { repository = "serde-rs/serde" }
-
-[features]
-default = ["std"]
-
-std = []
-unstable = []
-alloc = ["unstable"]
-collections = ["alloc"]
-unstable-testing = ["unstable", "std"]
-
-# to get serde_derive picked up by play.integer32.com
-playground = ["serde_derive"]
+keywords = ["serialization"]
 
 [dependencies]
-serde_derive = { version = "0.9", optional = true }
-
-[dev-dependencies]
-serde_derive = "0.9"
+num = "*"

serde/src/buf.rs

@@ -0,0 +1,94 @@
+use std::cmp;
+use std::io;
+use std::slice;
+
+trait IntoBufRead {
+    type IntoBuf: io::BufRead + BufReadExt;
+
+    fn into_buf_read(self) -> Self::IntoBuf;
+}
+
+trait BufReadExt {
+    fn get_buf(&self) -> &[u8];
+    fn read_u8(&mut self) -> io::Result<Option<u8>>;
+}
+
+struct SliceReader<'a> {
+    buf: &'a [u8],
+}
+
+impl<'a> io::Read for SliceReader<'a> {
+    #[inline]
+    fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
+        let amt = cmp::min(buf.len(), self.buf.len());
+        let (a, b) = self.buf.split_at(amt);
+        slice::bytes::copy_memory(buf, a);
+        *self.buf = b;
+        Ok(amt)
+    }
+}
+
+impl<'a> io::BufRead for SliceReader<'a> {
+    fn fill_buf(&mut self) -> io::Result<&[u8]> { Ok(*self) }
+    fn consume(&mut self, amt: usize) { *self.buf = &self.buf[amt..]; }
+}
+
+impl<'a> BufReadExt for SliceReader<'a> {
+    fn get_buf(&self) -> &[u8] { self.buf }
+    fn read_u8(&mut self) -> io::Result<Option<u8>> {
+        let byte = self.buf.get(0);
+        *self.buf = &self.buf[1..];
+        byte
+    }
+}
+
+struct BufReader<R> {
+    inner: R,
+    buf: io::Cursor<Vec<u8>>,
+}
+
+impl<R> BufReader<R> where R: io::Read {
+    fn new(inner: R) -> Self {
+        BufferedReader::with_capacity(io::DEFAULT_BUF_SIZE, inner)
+    }
+
+    fn new(cap: usize, inner: R) -> Self {
+        BufferedReader {
+            inner: inner,
+            buf: io::Cursor::new(Vec::with_capacity(cap)),
+        }
+    }
+
+    fn into_inner(self) -> R {
+        self.inner
+    }
+}
+
+impl<R> Read for BufReader<R> where R: io::Read {
+    fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
+        // If we don't have any buffered data and we're doing a massive read
+        // (larger than our internal buffer), bypass our internal buffer
+        // entirely.
+        if self.buf.get_ref().len() == self.buf.position() as usize &&
+            buf.len() >= self.buf.get_ref().capacity() {
+            return self.inner.read(buf);
+        }
+        try!(self.fill_buf());
+        self.buf.read(buf)
+    }
+}
+
+impl<R> BufReadExt for BufReader<R> {
+    fn get_buf(&self) -> &[u8] {
+        self.buf.get_ref()
+    }
+
+    fn read_u8(&mut self) -> io::Result<Option<u8>> {
+        if self.buf.get_ref().len() == self.buf.position() as usize {
+
+        }
+        let byte = self.buf.get(0);
+        *self.buf = &self.buf[1..];
+        byte
+    }
+}

serde/src/bytes.rs

@@ -1,91 +1,39 @@
-//! Wrapper types to enable optimized handling of `&[u8]` and `Vec<u8>`.
-//!
-//! Without specialization, Rust forces us to treat `&[u8]` just like any other
-//! slice and `Vec<u8>` just like any other vector. In reality this particular
-//! slice and vector can often be serialized and deserialized in a more
-//! efficient, compact representation in many formats.
-//!
-//! When working with such a format, you can opt into specialized handling of
-//! `&[u8]` by wrapping it in `bytes::Bytes` and `Vec<u8>` by wrapping it in
-//! `bytes::ByteBuf`.
-//!
-//! Rust support for specialization is being tracked in
-//! [rust-lang/rust#31844][specialization]. Once it lands in the stable compiler
-//! we will be deprecating these wrapper types in favor of optimizing `&[u8]`
-//! and `Vec<u8>` out of the box.
-//!
-//! [specialization]: https://github.com/rust-lang/rust/issues/31844
+//! Helper module to enable serializing bytes more efficiently
 
-use core::{ops, fmt, char, iter, slice};
-use core::fmt::Write;
+use std::ops;
+use std::fmt;
+use std::ascii;
 
 use ser;
-
-#[cfg(any(feature = "std", feature = "collections"))]
-pub use self::bytebuf::ByteBuf;
-
-#[cfg(any(feature = "std", feature = "collections"))]
-#[doc(hidden)] // does anybody need this?
-pub use self::bytebuf::ByteBufVisitor;
-
-#[cfg(feature = "collections")]
-use collections::Vec;
+use de;
 
 ///////////////////////////////////////////////////////////////////////////////
 
-/// Wraps a `&[u8]` in order to serialize in an efficient way. Does not support
-/// deserialization.
-///
-/// ```rust
-/// # #[macro_use] extern crate serde_derive;
-/// # extern crate serde;
-/// # use std::net::IpAddr;
-/// #
-/// use serde::bytes::Bytes;
-///
-/// # #[allow(dead_code)]
-/// #[derive(Serialize)]
-/// struct Packet<'a> {
-///     destination: IpAddr,
-///     payload: Bytes<'a>,
-/// }
-/// #
-/// # fn main() {}
-/// ```
+/// `Bytes` wraps a `&[u8]` in order to serialize into a byte array.
 #[derive(Clone, Copy, Eq, Hash, PartialEq, PartialOrd, Ord)]
 pub struct Bytes<'a> {
     bytes: &'a [u8],
 }
 
-impl<'a> Bytes<'a> {
-    /// Wrap an existing `&[u8]`.
-    pub fn new(bytes: &'a [u8]) -> Self {
+impl<'a> fmt::Debug for Bytes<'a> {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "b\"{}\"", escape_bytestring(self.bytes))
+    }
+}
+
+impl<'a> From<&'a [u8]> for Bytes<'a> {
+    fn from(bytes: &'a [u8]) -> Self {
         Bytes {
             bytes: bytes,
         }
     }
 }
 
-impl<'a> fmt::Debug for Bytes<'a> {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        try!(f.write_str("b\""));
-        for c in escape_bytestring(self.bytes) {
-            try!(f.write_char(c));
-        }
-        f.write_char('"')
-    }
-}
-
-impl<'a> From<&'a [u8]> for Bytes<'a> {
-    fn from(bytes: &'a [u8]) -> Self {
-        Bytes::new(bytes)
-    }
-}
-
-#[cfg(any(feature = "std", feature = "collections"))]
 impl<'a> From<&'a Vec<u8>> for Bytes<'a> {
     fn from(bytes: &'a Vec<u8>) -> Self {
-        Bytes::new(bytes)
+        Bytes {
+            bytes: &bytes,
+        }
     }
 }
 
@@ -103,208 +51,163 @@ impl<'a> ops::Deref for Bytes<'a> {
 
 impl<'a> ser::Serialize for Bytes<'a> {
     #[inline]
-    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    fn serialize<S>(&self, serializer: &mut S) -> Result<(), S::Error>
         where S: ser::Serializer
     {
-        serializer.serialize_bytes(self.bytes)
+        serializer.visit_bytes(self.bytes)
     }
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
-#[cfg(any(feature = "std", feature = "collections"))]
-mod bytebuf {
-    use core::ops;
-    use core::fmt;
-    use core::fmt::Write;
+/// `ByteBuf` wraps a `Vec<u8>` in order to hook into serialize and from deserialize a byte array.
+#[derive(Clone, Eq, Hash, PartialEq, PartialOrd, Ord)]
+pub struct ByteBuf {
+    bytes: Vec<u8>,
+}
 
-    use ser;
-    use de;
-
-    #[cfg(feature = "collections")]
-    use collections::{String, Vec};
-
-    /// Wraps a `Vec<u8>` in order to serialize and deserialize in an efficient
-    /// way.
-    ///
-    /// ```rust
-    /// # #[macro_use] extern crate serde_derive;
-    /// # extern crate serde;
-    /// # use std::net::IpAddr;
-    /// #
-    /// use serde::bytes::ByteBuf;
-    ///
-    /// # #[allow(dead_code)]
-    /// #[derive(Serialize, Deserialize)]
-    /// struct Packet {
-    ///     destination: IpAddr,
-    ///     payload: ByteBuf,
-    /// }
-    /// #
-    /// # fn main() {}
-    /// ```
-    #[derive(Clone, Default, Eq, Hash, PartialEq, PartialOrd, Ord)]
-    pub struct ByteBuf {
-        bytes: Vec<u8>,
-    }
-
-    impl ByteBuf {
-        /// Construct a new, empty `ByteBuf`.
-        pub fn new() -> Self {
-            ByteBuf::from(Vec::new())
-        }
-
-        /// Construct a new, empty `ByteBuf` with the specified capacity.
-        pub fn with_capacity(cap: usize) -> Self {
-            ByteBuf::from(Vec::with_capacity(cap))
-        }
-
-        /// Wrap existing bytes in a `ByteBuf`.
-        pub fn from<T: Into<Vec<u8>>>(bytes: T) -> Self {
-            ByteBuf {
-                bytes: bytes.into(),
-            }
+impl ByteBuf {
+    pub fn new() -> Self {
+        ByteBuf {
+            bytes: Vec::new(),
         }
     }
 
-    impl fmt::Debug for ByteBuf {
-        fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-            try!(f.write_str("b\""));
-            for c in super::escape_bytestring(self.bytes.as_ref()) {
-                try!(f.write_char(c));
-            }
-            f.write_char('"')
+    pub fn with_capacity(cap: usize) -> Self {
+        ByteBuf {
+            bytes: Vec::with_capacity(cap)
         }
     }
+}
 
-    impl Into<Vec<u8>> for ByteBuf {
-        fn into(self) -> Vec<u8> {
-            self.bytes
+impl fmt::Debug for ByteBuf {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "b\"{}\"", escape_bytestring(self.bytes.as_ref()))
+    }
+}
+
+impl Into<Vec<u8>> for ByteBuf {
+    fn into(self) -> Vec<u8> {
+        self.bytes
+    }
+}
+
+impl From<Vec<u8>> for ByteBuf {
+    fn from(bytes: Vec<u8>) -> Self {
+        ByteBuf {
+            bytes: bytes,
         }
     }
+}
 
-    impl From<Vec<u8>> for ByteBuf {
-        fn from(bytes: Vec<u8>) -> Self {
-            ByteBuf::from(bytes)
-        }
+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(),
+        })
     }
 
-    impl AsRef<Vec<u8>> for ByteBuf {
-        fn as_ref(&self) -> &Vec<u8> {
-            &self.bytes
+    #[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,
+        })
     }
 
-    impl AsRef<[u8]> for ByteBuf {
-        fn as_ref(&self) -> &[u8] {
-            &self.bytes
-        }
+    #[inline]
+    fn visit_bytes<E>(&mut self, v: &[u8]) -> Result<ByteBuf, E>
+        where E: de::Error,
+    {
+        self.visit_byte_buf(v.to_vec())
     }
 
-    impl AsMut<Vec<u8>> for ByteBuf {
-        fn as_mut(&mut self) -> &mut Vec<u8> {
-            &mut self.bytes
-        }
+    #[inline]
+    fn visit_byte_buf<E>(&mut self, v: Vec<u8>) -> Result<ByteBuf, E>
+        where E: de::Error,
+    {
+        Ok(ByteBuf {
+            bytes: v,
+        })
     }
+}
 
-    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: S) -> Result<S::Ok, S::Error>
-            where S: ser::Serializer
-        {
-            serializer.serialize_bytes(self)
-        }
-    }
-
-    /// This type implements the `serde::de::Visitor` trait for a `ByteBuf`.
-    pub struct ByteBufVisitor;
-
-    impl de::Visitor for ByteBufVisitor {
-        type Value = ByteBuf;
-
-        fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
-            formatter.write_str("byte array")
-        }
-
-        #[inline]
-        fn visit_unit<E>(self) -> Result<ByteBuf, E>
-            where E: de::Error,
-        {
-            Ok(ByteBuf::new())
-        }
-
-        #[inline]
-        fn visit_seq<V>(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);
-            }
-
-            Ok(ByteBuf::from(values))
-        }
-
-        #[inline]
-        fn visit_bytes<E>(self, v: &[u8]) -> Result<ByteBuf, E>
-            where E: de::Error,
-        {
-            Ok(ByteBuf::from(v))
-        }
-
-        #[inline]
-        fn visit_byte_buf<E>(self, v: Vec<u8>) -> Result<ByteBuf, E>
-            where E: de::Error,
-        {
-            Ok(ByteBuf::from(v))
-        }
-
-        fn visit_str<E>(self, v: &str) -> Result<ByteBuf, E>
-            where E: de::Error,
-        {
-            Ok(ByteBuf::from(v))
-        }
-
-        fn visit_string<E>(self, v: String) -> Result<ByteBuf, E>
-            where E: de::Error,
-        {
-            Ok(ByteBuf::from(v))
-        }
-    }
-
-    impl de::Deserialize for ByteBuf {
-        #[inline]
-        fn deserialize<D>(deserializer: D) -> Result<ByteBuf, D::Error>
-            where D: de::Deserializer
-        {
-            deserializer.deserialize_byte_buf(ByteBufVisitor)
-        }
+impl de::Deserialize for ByteBuf {
+    #[inline]
+    fn deserialize<D>(deserializer: &mut D) -> Result<ByteBuf, D::Error>
+        where D: de::Deserializer
+    {
+        deserializer.visit_bytes(ByteBufVisitor)
     }
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
-#[inline]
-fn escape_bytestring<'a>(bytes: &'a [u8]) -> iter::FlatMap<slice::Iter<'a, u8>, char::EscapeDefault, fn(&u8) -> char::EscapeDefault> {
-    fn f(b: &u8) -> char::EscapeDefault {
-        char::from_u32(*b as u32).unwrap().escape_default()
+fn escape_bytestring(bytes: &[u8]) -> String {
+    let mut result = String::new();
+    for &b in bytes {
+        for esc in ascii::escape_default(b) {
+            result.push(esc as char);
+        }
     }
-    bytes.iter().flat_map(f as fn(&u8) -> char::EscapeDefault)
+    result
 }

serde/src/de/content.rs

@@ -1,761 +0,0 @@
-// This module is doc(hidden) and nothing here should be used outside of
-// generated code.
-//
-// We will iterate on the implementation for a few releases and only have to
-// worry about backward compatibility for the `untagged` and `tag` attributes
-// rather than for this entire mechanism.
-//
-// This issue is tracking making some of this stuff public:
-// https://github.com/serde-rs/serde/issues/741
-
-#![doc(hidden)]
-
-use core::fmt;
-use core::marker::PhantomData;
-
-#[cfg(all(not(feature = "std"), feature = "collections"))]
-use collections::{String, Vec};
-
-#[cfg(all(feature = "alloc", not(feature = "std")))]
-use alloc::boxed::Box;
-
-use de::{
-    self,
-    Deserialize,
-    DeserializeSeed,
-    Deserializer,
-    Visitor,
-    SeqVisitor,
-    MapVisitor,
-    EnumVisitor,
-};
-
-/// Used from generated code to buffer the contents of the Deserializer when
-/// deserializing untagged enums and internally tagged enums.
-///
-/// Not public API. Use serde-value instead.
-#[derive(Debug)]
-pub enum Content {
-    // Don't mind the PhantomData, just need to use E somewhere.
-    Bool(bool),
-
-    U8(u8),
-    U16(u16),
-    U32(u32),
-    U64(u64),
-
-    I8(i8),
-    I16(i16),
-    I32(i32),
-    I64(i64),
-
-    F32(f32),
-    F64(f64),
-
-    Char(char),
-    String(String),
-    Bytes(Vec<u8>),
-
-    None,
-    Some(Box<Content>),
-
-    Unit,
-    Newtype(Box<Content>),
-    Seq(Vec<Content>),
-    Map(Vec<(Content, Content)>),
-}
-
-impl Deserialize for Content {
-    fn deserialize<D: Deserializer>(deserializer: D) -> Result<Self, D::Error> {
-        // Untagged and internally tagged enums are only supported in
-        // self-describing formats.
-        deserializer.deserialize(ContentVisitor)
-    }
-}
-
-struct ContentVisitor;
-
-impl Visitor for ContentVisitor {
-    type Value = Content;
-
-    fn expecting(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
-        fmt.write_str("any value")
-    }
-
-    fn visit_bool<F>(self, value: bool) -> Result<Self::Value, F>
-        where F: de::Error
-    {
-        Ok(Content::Bool(value))
-    }
-
-    fn visit_i8<F>(self, value: i8) -> Result<Self::Value, F>
-        where F: de::Error
-    {
-        Ok(Content::I8(value))
-    }
-
-    fn visit_i16<F>(self, value: i16) -> Result<Self::Value, F>
-        where F: de::Error
-    {
-        Ok(Content::I16(value))
-    }
-
-    fn visit_i32<F>(self, value: i32) -> Result<Self::Value, F>
-        where F: de::Error
-    {
-        Ok(Content::I32(value))
-    }
-
-    fn visit_i64<F>(self, value: i64) -> Result<Self::Value, F>
-        where F: de::Error
-    {
-        Ok(Content::I64(value))
-    }
-
-    fn visit_u8<F>(self, value: u8) -> Result<Self::Value, F>
-        where F: de::Error
-    {
-        Ok(Content::U8(value))
-    }
-
-    fn visit_u16<F>(self, value: u16) -> Result<Self::Value, F>
-        where F: de::Error
-    {
-        Ok(Content::U16(value))
-    }
-
-    fn visit_u32<F>(self, value: u32) -> Result<Self::Value, F>
-        where F: de::Error
-    {
-        Ok(Content::U32(value))
-    }
-
-    fn visit_u64<F>(self, value: u64) -> Result<Self::Value, F>
-        where F: de::Error
-    {
-        Ok(Content::U64(value))
-    }
-
-    fn visit_f32<F>(self, value: f32) -> Result<Self::Value, F>
-        where F: de::Error
-    {
-        Ok(Content::F32(value))
-    }
-
-    fn visit_f64<F>(self, value: f64) -> Result<Self::Value, F>
-        where F: de::Error
-    {
-        Ok(Content::F64(value))
-    }
-
-    fn visit_char<F>(self, value: char) -> Result<Self::Value, F>
-        where F: de::Error
-    {
-        Ok(Content::Char(value))
-    }
-
-    fn visit_str<F>(self, value: &str) -> Result<Self::Value, F>
-        where F: de::Error
-    {
-        Ok(Content::String(value.into()))
-    }
-
-    fn visit_string<F>(self, value: String) -> Result<Self::Value, F>
-        where F: de::Error
-    {
-        Ok(Content::String(value))
-    }
-
-    fn visit_bytes<F>(self, value: &[u8]) -> Result<Self::Value, F>
-        where F: de::Error
-    {
-        Ok(Content::Bytes(value.into()))
-    }
-
-    fn visit_byte_buf<F>(self, value: Vec<u8>) -> Result<Self::Value, F>
-        where F: de::Error
-    {
-        Ok(Content::Bytes(value))
-    }
-
-    fn visit_unit<F>(self) -> Result<Self::Value, F>
-        where F: de::Error
-    {
-        Ok(Content::Unit)
-    }
-
-    fn visit_none<F>(self) -> Result<Self::Value, F>
-        where F: de::Error
-    {
-        Ok(Content::None)
-    }
-
-    fn visit_some<D>(self, deserializer: D) -> Result<Self::Value, D::Error>
-        where D: Deserializer
-    {
-        Deserialize::deserialize(deserializer).map(|v| Content::Some(Box::new(v)))
-    }
-
-    fn visit_newtype_struct<D>(self, deserializer: D) -> Result<Self::Value, D::Error>
-        where D: Deserializer
-    {
-        Deserialize::deserialize(deserializer).map(|v| Content::Newtype(Box::new(v)))
-    }
-
-    fn visit_seq<V>(self, mut visitor: V) -> Result<Self::Value, V::Error>
-        where V: SeqVisitor
-    {
-        let mut vec = Vec::with_capacity(visitor.size_hint().0);
-        while let Some(e) = try!(visitor.visit()) {
-            vec.push(e);
-        }
-        Ok(Content::Seq(vec))
-    }
-
-    fn visit_map<V>(self, mut visitor: V) -> Result<Self::Value, V::Error>
-        where V: MapVisitor
-    {
-        let mut vec = Vec::with_capacity(visitor.size_hint().0);
-        while let Some(kv) = try!(visitor.visit()) {
-            vec.push(kv);
-        }
-        Ok(Content::Map(vec))
-    }
-
-    fn visit_enum<V>(self, _visitor: V) -> Result<Self::Value, V::Error>
-        where V: EnumVisitor
-    {
-        Err(de::Error::custom("untagged and internally tagged enums do not support enum input"))
-    }
-}
-
-/// This is the type of the map keys in an internally tagged enum.
-///
-/// Not public API.
-pub enum TagOrContent {
-    Tag,
-    Content(Content),
-}
-
-struct TagOrContentVisitor {
-    name: &'static str,
-}
-
-impl TagOrContentVisitor {
-    fn new(name: &'static str) -> Self {
-        TagOrContentVisitor {
-            name: name,
-        }
-    }
-}
-
-impl DeserializeSeed for TagOrContentVisitor {
-    type Value = TagOrContent;
-
-    fn deserialize<D>(self, deserializer: D) -> Result<Self::Value, D::Error>
-        where D: Deserializer
-    {
-        // Internally tagged enums are only supported in self-describing
-        // formats.
-        deserializer.deserialize(self)
-    }
-}
-
-impl Visitor for TagOrContentVisitor {
-    type Value = TagOrContent;
-
-    fn expecting(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
-        write!(fmt, "a type tag `{}` or any other value", self.name)
-    }
-
-    fn visit_bool<F>(self, value: bool) -> Result<Self::Value, F>
-        where F: de::Error
-    {
-        ContentVisitor.visit_bool(value).map(TagOrContent::Content)
-    }
-
-    fn visit_i8<F>(self, value: i8) -> Result<Self::Value, F>
-        where F: de::Error
-    {
-        ContentVisitor.visit_i8(value).map(TagOrContent::Content)
-    }
-
-    fn visit_i16<F>(self, value: i16) -> Result<Self::Value, F>
-        where F: de::Error
-    {
-        ContentVisitor.visit_i16(value).map(TagOrContent::Content)
-    }
-
-    fn visit_i32<F>(self, value: i32) -> Result<Self::Value, F>
-        where F: de::Error
-    {
-        ContentVisitor.visit_i32(value).map(TagOrContent::Content)
-    }
-
-    fn visit_i64<F>(self, value: i64) -> Result<Self::Value, F>
-        where F: de::Error
-    {
-        ContentVisitor.visit_i64(value).map(TagOrContent::Content)
-    }
-
-    fn visit_u8<F>(self, value: u8) -> Result<Self::Value, F>
-        where F: de::Error
-    {
-        ContentVisitor.visit_u8(value).map(TagOrContent::Content)
-    }
-
-    fn visit_u16<F>(self, value: u16) -> Result<Self::Value, F>
-        where F: de::Error
-    {
-        ContentVisitor.visit_u16(value).map(TagOrContent::Content)
-    }
-
-    fn visit_u32<F>(self, value: u32) -> Result<Self::Value, F>
-        where F: de::Error
-    {
-        ContentVisitor.visit_u32(value).map(TagOrContent::Content)
-    }
-
-    fn visit_u64<F>(self, value: u64) -> Result<Self::Value, F>
-        where F: de::Error
-    {
-        ContentVisitor.visit_u64(value).map(TagOrContent::Content)
-    }
-
-    fn visit_f32<F>(self, value: f32) -> Result<Self::Value, F>
-        where F: de::Error
-    {
-        ContentVisitor.visit_f32(value).map(TagOrContent::Content)
-    }
-
-    fn visit_f64<F>(self, value: f64) -> Result<Self::Value, F>
-        where F: de::Error
-    {
-        ContentVisitor.visit_f64(value).map(TagOrContent::Content)
-    }
-
-    fn visit_char<F>(self, value: char) -> Result<Self::Value, F>
-        where F: de::Error
-    {
-        ContentVisitor.visit_char(value).map(TagOrContent::Content)
-    }
-
-    fn visit_str<F>(self, value: &str) -> Result<Self::Value, F>
-        where F: de::Error
-    {
-        if value == self.name {
-            Ok(TagOrContent::Tag)
-        } else {
-            ContentVisitor.visit_str(value).map(TagOrContent::Content)
-        }
-    }
-
-    fn visit_string<F>(self, value: String) -> Result<Self::Value, F>
-        where F: de::Error
-    {
-        if value == self.name {
-            Ok(TagOrContent::Tag)
-        } else {
-            ContentVisitor.visit_string(value).map(TagOrContent::Content)
-        }
-    }
-
-    fn visit_bytes<F>(self, value: &[u8]) -> Result<Self::Value, F>
-        where F: de::Error
-    {
-        if value == self.name.as_bytes() {
-            Ok(TagOrContent::Tag)
-        } else {
-            ContentVisitor.visit_bytes(value).map(TagOrContent::Content)
-        }
-    }
-
-    fn visit_byte_buf<F>(self, value: Vec<u8>) -> Result<Self::Value, F>
-        where F: de::Error
-    {
-        if value == self.name.as_bytes() {
-            Ok(TagOrContent::Tag)
-        } else {
-            ContentVisitor.visit_byte_buf(value).map(TagOrContent::Content)
-        }
-    }
-
-    fn visit_unit<F>(self) -> Result<Self::Value, F>
-        where F: de::Error
-    {
-        ContentVisitor.visit_unit().map(TagOrContent::Content)
-    }
-
-    fn visit_none<F>(self) -> Result<Self::Value, F>
-        where F: de::Error
-    {
-        ContentVisitor.visit_none().map(TagOrContent::Content)
-    }
-
-    fn visit_some<D>(self, deserializer: D) -> Result<Self::Value, D::Error>
-        where D: Deserializer
-    {
-        ContentVisitor.visit_some(deserializer).map(TagOrContent::Content)
-    }
-
-    fn visit_newtype_struct<D>(self, deserializer: D) -> Result<Self::Value, D::Error>
-        where D: Deserializer
-    {
-        ContentVisitor.visit_newtype_struct(deserializer).map(TagOrContent::Content)
-    }
-
-    fn visit_seq<V>(self, visitor: V) -> Result<Self::Value, V::Error>
-        where V: SeqVisitor
-    {
-        ContentVisitor.visit_seq(visitor).map(TagOrContent::Content)
-    }
-
-    fn visit_map<V>(self, visitor: V) -> Result<Self::Value, V::Error>
-        where V: MapVisitor
-    {
-        ContentVisitor.visit_map(visitor).map(TagOrContent::Content)
-    }
-
-    fn visit_enum<V>(self, visitor: V) -> Result<Self::Value, V::Error>
-        where V: EnumVisitor
-    {
-        ContentVisitor.visit_enum(visitor).map(TagOrContent::Content)
-    }
-}
-
-/// Used by generated code to deserialize an internally tagged enum.
-///
-/// Not public API.
-pub struct TaggedContent<T> {
-    pub tag: T,
-    pub content: Content,
-}
-
-/// Not public API.
-pub struct TaggedContentVisitor<T> {
-    tag_name: &'static str,
-    tag: PhantomData<T>,
-}
-
-impl<T> TaggedContentVisitor<T> {
-    /// Visitor for the content of an internally tagged enum with the given tag
-    /// name.
-    pub fn new(name: &'static str) -> Self {
-        TaggedContentVisitor {
-            tag_name: name,
-            tag: PhantomData,
-        }
-    }
-}
-
-impl<T> DeserializeSeed for TaggedContentVisitor<T>
-    where T: Deserialize
-{
-    type Value = TaggedContent<T>;
-
-    fn deserialize<D>(self, deserializer: D) -> Result<Self::Value, D::Error>
-        where D: Deserializer
-    {
-        // Internally tagged enums are only supported in self-describing
-        // formats.
-        deserializer.deserialize(self)
-    }
-}
-
-impl<T> Visitor for TaggedContentVisitor<T>
-    where T: Deserialize
-{
-    type Value = TaggedContent<T>;
-
-    fn expecting(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
-        fmt.write_str("any value")
-    }
-
-    fn visit_map<V>(self, mut visitor: V) -> Result<Self::Value, V::Error>
-        where V: MapVisitor
-    {
-        let mut tag = None;
-        let mut vec = Vec::with_capacity(visitor.size_hint().0);
-        while let Some(k) = try!(visitor.visit_key_seed(TagOrContentVisitor::new(self.tag_name))) {
-            match k {
-                TagOrContent::Tag => {
-                    if tag.is_some() {
-                        return Err(de::Error::duplicate_field(self.tag_name));
-                    }
-                    tag = Some(try!(visitor.visit_value()));
-                }
-                TagOrContent::Content(k) => {
-                    let v = try!(visitor.visit_value());
-                    vec.push((k, v));
-                }
-            }
-        }
-        match tag {
-            None => {
-                Err(de::Error::missing_field(self.tag_name))
-            }
-            Some(tag) => {
-                Ok(TaggedContent {
-                    tag: tag,
-                    content: Content::Map(vec),
-                })
-            }
-        }
-    }
-}
-
-/// Not public API
-pub struct ContentDeserializer<E> {
-    content: Content,
-    err: PhantomData<E>,
-}
-
-/// Used when deserializing an internally tagged enum because the content will
-/// be used exactly once.
-impl<E> Deserializer for ContentDeserializer<E>
-    where E: de::Error
-{
-    type Error = E;
-
-    fn deserialize<V>(self, visitor: V) -> Result<V::Value, Self::Error>
-        where V: Visitor
-    {
-        match self.content {
-            Content::Bool(v) => visitor.visit_bool(v),
-            Content::U8(v) => visitor.visit_u8(v),
-            Content::U16(v) => visitor.visit_u16(v),
-            Content::U32(v) => visitor.visit_u32(v),
-            Content::U64(v) => visitor.visit_u64(v),
-            Content::I8(v) => visitor.visit_i8(v),
-            Content::I16(v) => visitor.visit_i16(v),
-            Content::I32(v) => visitor.visit_i32(v),
-            Content::I64(v) => visitor.visit_i64(v),
-            Content::F32(v) => visitor.visit_f32(v),
-            Content::F64(v) => visitor.visit_f64(v),
-            Content::Char(v) => visitor.visit_char(v),
-            Content::String(v) => visitor.visit_string(v),
-            Content::Unit => visitor.visit_unit(),
-            Content::None => visitor.visit_none(),
-            Content::Some(v) => visitor.visit_some(ContentDeserializer::new(*v)),
-            Content::Newtype(v) => visitor.visit_newtype_struct(ContentDeserializer::new(*v)),
-            Content::Seq(v) => {
-                let seq = v.into_iter().map(ContentDeserializer::new);
-                let mut seq_visitor = de::value::SeqDeserializer::new(seq);
-                let value = try!(visitor.visit_seq(&mut seq_visitor));
-                try!(seq_visitor.end());
-                Ok(value)
-            },
-            Content::Map(v) => {
-                let map = v.into_iter().map(|(k, v)| (ContentDeserializer::new(k), ContentDeserializer::new(v)));
-                let mut map_visitor = de::value::MapDeserializer::new(map);
-                let value = try!(visitor.visit_map(&mut map_visitor));
-                try!(map_visitor.end());
-                Ok(value)
-            },
-            Content::Bytes(v) => visitor.visit_byte_buf(v),
-        }
-    }
-
-    fn deserialize_option<V>(self, visitor: V) -> Result<V::Value, Self::Error>
-        where V: Visitor
-    {
-        match self.content {
-            Content::None => visitor.visit_none(),
-            Content::Some(v) => visitor.visit_some(ContentDeserializer::new(*v)),
-            Content::Unit => visitor.visit_unit(),
-            _ => visitor.visit_some(self)
-        }
-    }
-
-    fn deserialize_newtype_struct<V>(self, _name: &str, visitor: V) -> Result<V::Value, Self::Error>
-        where V: Visitor
-    {
-        visitor.visit_newtype_struct(self)
-    }
-
-    forward_to_deserialize! {
-        bool u8 u16 u32 u64 i8 i16 i32 i64 f32 f64 char str string unit seq
-        seq_fixed_size bytes byte_buf map unit_struct tuple_struct struct
-        struct_field tuple enum ignored_any
-    }
-}
-
-impl<E> ContentDeserializer<E> {
-    /// private API, don't use
-    pub fn new(content: Content) -> Self {
-        ContentDeserializer {
-            content: content,
-            err: PhantomData,
-        }
-    }
-}
-
-/// Not public API.
-pub struct ContentRefDeserializer<'a, E> {
-    content: &'a Content,
-    err: PhantomData<E>,
-}
-
-/// Used when deserializing an untagged enum because the content may need to be
-/// used more than once.
-impl<'a, E> Deserializer for ContentRefDeserializer<'a, E>
-    where E: de::Error
-{
-    type Error = E;
-
-    fn deserialize<V>(self, visitor: V) -> Result<V::Value, Self::Error>
-        where V: Visitor
-    {
-        match *self.content {
-            Content::Bool(v) => visitor.visit_bool(v),
-            Content::U8(v) => visitor.visit_u8(v),
-            Content::U16(v) => visitor.visit_u16(v),
-            Content::U32(v) => visitor.visit_u32(v),
-            Content::U64(v) => visitor.visit_u64(v),
-            Content::I8(v) => visitor.visit_i8(v),
-            Content::I16(v) => visitor.visit_i16(v),
-            Content::I32(v) => visitor.visit_i32(v),
-            Content::I64(v) => visitor.visit_i64(v),
-            Content::F32(v) => visitor.visit_f32(v),
-            Content::F64(v) => visitor.visit_f64(v),
-            Content::Char(v) => visitor.visit_char(v),
-            Content::String(ref v) => visitor.visit_str(v),
-            Content::Unit => visitor.visit_unit(),
-            Content::None => visitor.visit_none(),
-            Content::Some(ref v) => visitor.visit_some(ContentRefDeserializer::new(v)),
-            Content::Newtype(ref v) => visitor.visit_newtype_struct(ContentRefDeserializer::new(v)),
-            Content::Seq(ref v) => {
-                let seq = v.into_iter().map(ContentRefDeserializer::new);
-                let mut seq_visitor = de::value::SeqDeserializer::new(seq);
-                let value = try!(visitor.visit_seq(&mut seq_visitor));
-                try!(seq_visitor.end());
-                Ok(value)
-            },
-            Content::Map(ref v) => {
-                let map = v.into_iter().map(|&(ref k, ref v)| (ContentRefDeserializer::new(k), ContentRefDeserializer::new(v)));
-                let mut map_visitor = de::value::MapDeserializer::new(map);
-                let value = try!(visitor.visit_map(&mut map_visitor));
-                try!(map_visitor.end());
-                Ok(value)
-            },
-            Content::Bytes(ref v) => visitor.visit_bytes(v),
-        }
-    }
-
-    fn deserialize_option<V>(self, visitor: V) -> Result<V::Value, Self::Error>
-        where V: Visitor
-    {
-        match *self.content {
-            Content::None => visitor.visit_none(),
-            Content::Some(ref v) => visitor.visit_some(ContentRefDeserializer::new(v)),
-            Content::Unit => visitor.visit_unit(),
-            _ => visitor.visit_some(self)
-        }
-    }
-
-    fn deserialize_newtype_struct<V>(self, _name: &str, visitor: V) -> Result<V::Value, Self::Error>
-        where V: Visitor
-    {
-        visitor.visit_newtype_struct(self)
-    }
-
-    forward_to_deserialize! {
-        bool u8 u16 u32 u64 i8 i16 i32 i64 f32 f64 char str string unit seq
-        seq_fixed_size bytes byte_buf map unit_struct tuple_struct struct
-        struct_field tuple enum ignored_any
-    }
-}
-
-impl<'a, E> ContentRefDeserializer<'a, E> {
-    /// private API, don't use
-    pub fn new(content: &'a Content) -> Self {
-        ContentRefDeserializer {
-            content: content,
-            err: PhantomData,
-        }
-    }
-}
-
-impl<E> de::value::ValueDeserializer<E> for ContentDeserializer<E>
-    where E: de::Error
-{
-    type Deserializer = Self;
-
-    fn into_deserializer(self) -> Self {
-        self
-    }
-}
-
-impl<'a, E> de::value::ValueDeserializer<E> for ContentRefDeserializer<'a, E>
-    where E: de::Error
-{
-    type Deserializer = Self;
-
-    fn into_deserializer(self) -> Self {
-        self
-    }
-}
-
-/// Visitor for deserializing an internally tagged unit variant.
-///
-/// Not public API.
-pub struct InternallyTaggedUnitVisitor<'a> {
-    type_name: &'a str,
-    variant_name: &'a str,
-}
-
-impl<'a> InternallyTaggedUnitVisitor<'a> {
-    /// Not public API.
-    pub fn new(type_name: &'a str, variant_name: &'a str) -> Self {
-        InternallyTaggedUnitVisitor {
-            type_name: type_name,
-            variant_name: variant_name,
-        }
-    }
-}
-
-impl<'a> Visitor for InternallyTaggedUnitVisitor<'a> {
-    type Value = ();
-
-    fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
-        write!(formatter, "unit variant {}::{}", self.type_name, self.variant_name)
-    }
-
-    fn visit_map<V>(self, _: V) -> Result<(), V::Error>
-        where V: MapVisitor
-    {
-        Ok(())
-    }
-}
-
-/// Visitor for deserializing an untagged unit variant.
-///
-/// Not public API.
-pub struct UntaggedUnitVisitor<'a> {
-    type_name: &'a str,
-    variant_name: &'a str,
-}
-
-impl<'a> UntaggedUnitVisitor<'a> {
-    /// Not public API.
-    pub fn new(type_name: &'a str, variant_name: &'a str) -> Self {
-        UntaggedUnitVisitor {
-            type_name: type_name,
-            variant_name: variant_name,
-        }
-    }
-}
-
-impl<'a> Visitor for UntaggedUnitVisitor<'a> {
-    type Value = ();
-
-    fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
-        write!(formatter, "unit variant {}::{}", self.type_name, self.variant_name)
-    }
-
-    fn visit_unit<E>(self) -> Result<(), E>
-        where E: de::Error
-    {
-        Ok(())
-    }
-}

serde/src/de/from_primitive.rs

@@ -1,409 +0,0 @@
-// Copyright 2013-2014 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.
-
-// Extracted from https://github.com/rust-num/num.
-
-// Rust 1.5 is unhappy that this private module is undocumented.
-#![allow(missing_docs)]
-
-use core::{usize, u8, u16, u32, u64};
-use core::{isize, i8, i16, i32, i64};
-use core::{f32, f64};
-use core::mem::size_of;
-
-/// Numbers which have upper and lower bounds
-pub trait Bounded {
-    // FIXME (#5527): These should be associated constants
-    /// returns the smallest finite number this type can represent
-    fn min_value() -> Self;
-    /// returns the largest finite number this type can represent
-    fn max_value() -> Self;
-}
-
-macro_rules! bounded_impl {
-    ($t:ty, $min:expr, $max:expr) => {
-        impl Bounded for $t {
-            #[inline]
-            fn min_value() -> $t { $min }
-
-            #[inline]
-            fn max_value() -> $t { $max }
-        }
-    }
-}
-
-bounded_impl!(usize, usize::MIN, usize::MAX);
-bounded_impl!(u8, u8::MIN, u8::MAX);
-bounded_impl!(u16, u16::MIN, u16::MAX);
-bounded_impl!(u32, u32::MIN, u32::MAX);
-bounded_impl!(u64, u64::MIN, u64::MAX);
-
-bounded_impl!(isize, isize::MIN, isize::MAX);
-bounded_impl!(i8, i8::MIN, i8::MAX);
-bounded_impl!(i16, i16::MIN, i16::MAX);
-bounded_impl!(i32, i32::MIN, i32::MAX);
-bounded_impl!(i64, i64::MIN, i64::MAX);
-
-bounded_impl!(f32, f32::MIN, f32::MAX);
-bounded_impl!(f64, f64::MIN, f64::MAX);
-
-/// A generic trait for converting a value to a number.
-pub trait ToPrimitive {
-    /// Converts the value of `self` to an `isize`.
-    #[inline]
-    fn to_isize(&self) -> Option<isize> {
-        self.to_i64().and_then(|x| x.to_isize())
-    }
-
-    /// Converts the value of `self` to an `i8`.
-    #[inline]
-    fn to_i8(&self) -> Option<i8> {
-        self.to_i64().and_then(|x| x.to_i8())
-    }
-
-    /// Converts the value of `self` to an `i16`.
-    #[inline]
-    fn to_i16(&self) -> Option<i16> {
-        self.to_i64().and_then(|x| x.to_i16())
-    }
-
-    /// Converts the value of `self` to an `i32`.
-    #[inline]
-    fn to_i32(&self) -> Option<i32> {
-        self.to_i64().and_then(|x| x.to_i32())
-    }
-
-    /// Converts the value of `self` to an `i64`.
-    fn to_i64(&self) -> Option<i64>;
-
-    /// Converts the value of `self` to a `usize`.
-    #[inline]
-    fn to_usize(&self) -> Option<usize> {
-        self.to_u64().and_then(|x| x.to_usize())
-    }
-
-    /// Converts the value of `self` to an `u8`.
-    #[inline]
-    fn to_u8(&self) -> Option<u8> {
-        self.to_u64().and_then(|x| x.to_u8())
-    }
-
-    /// Converts the value of `self` to an `u16`.
-    #[inline]
-    fn to_u16(&self) -> Option<u16> {
-        self.to_u64().and_then(|x| x.to_u16())
-    }
-
-    /// Converts the value of `self` to an `u32`.
-    #[inline]
-    fn to_u32(&self) -> Option<u32> {
-        self.to_u64().and_then(|x| x.to_u32())
-    }
-
-    /// Converts the value of `self` to an `u64`.
-    #[inline]
-    fn to_u64(&self) -> Option<u64>;
-
-    /// Converts the value of `self` to an `f32`.
-    #[inline]
-    fn to_f32(&self) -> Option<f32> {
-        self.to_f64().and_then(|x| x.to_f32())
-    }
-
-    /// Converts the value of `self` to an `f64`.
-    #[inline]
-    fn to_f64(&self) -> Option<f64> {
-        self.to_i64().and_then(|x| x.to_f64())
-    }
-}
-
-macro_rules! impl_to_primitive_int_to_int {
-    ($SrcT:ty, $DstT:ty, $slf:expr) => (
-        {
-            if size_of::<$SrcT>() <= size_of::<$DstT>() {
-                Some($slf as $DstT)
-            } else {
-                let n = $slf as i64;
-                let min_value: $DstT = Bounded::min_value();
-                let max_value: $DstT = Bounded::max_value();
-                if min_value as i64 <= n && n <= max_value as i64 {
-                    Some($slf as $DstT)
-                } else {
-                    None
-                }
-            }
-        }
-    )
-}
-
-macro_rules! impl_to_primitive_int_to_uint {
-    ($SrcT:ty, $DstT:ty, $slf:expr) => (
-        {
-            let zero: $SrcT = 0;
-            let max_value: $DstT = Bounded::max_value();
-            if zero <= $slf && $slf as u64 <= max_value as u64 {
-                Some($slf as $DstT)
-            } else {
-                None
-            }
-        }
-    )
-}
-
-macro_rules! impl_to_primitive_int {
-    ($T:ty) => (
-        impl ToPrimitive for $T {
-            #[inline]
-            fn to_isize(&self) -> Option<isize> { impl_to_primitive_int_to_int!($T, isize, *self) }
-            #[inline]
-            fn to_i8(&self) -> Option<i8> { impl_to_primitive_int_to_int!($T, i8, *self) }
-            #[inline]
-            fn to_i16(&self) -> Option<i16> { impl_to_primitive_int_to_int!($T, i16, *self) }
-            #[inline]
-            fn to_i32(&self) -> Option<i32> { impl_to_primitive_int_to_int!($T, i32, *self) }
-            #[inline]
-            fn to_i64(&self) -> Option<i64> { impl_to_primitive_int_to_int!($T, i64, *self) }
-
-            #[inline]
-            fn to_usize(&self) -> Option<usize> { impl_to_primitive_int_to_uint!($T, usize, *self) }
-            #[inline]
-            fn to_u8(&self) -> Option<u8> { impl_to_primitive_int_to_uint!($T, u8, *self) }
-            #[inline]
-            fn to_u16(&self) -> Option<u16> { impl_to_primitive_int_to_uint!($T, u16, *self) }
-            #[inline]
-            fn to_u32(&self) -> Option<u32> { impl_to_primitive_int_to_uint!($T, u32, *self) }
-            #[inline]
-            fn to_u64(&self) -> Option<u64> { impl_to_primitive_int_to_uint!($T, u64, *self) }
-
-            #[inline]
-            fn to_f32(&self) -> Option<f32> { Some(*self as f32) }
-            #[inline]
-            fn to_f64(&self) -> Option<f64> { Some(*self as f64) }
-        }
-    )
-}
-
-impl_to_primitive_int! { isize }
-impl_to_primitive_int! { i8 }
-impl_to_primitive_int! { i16 }
-impl_to_primitive_int! { i32 }
-impl_to_primitive_int! { i64 }
-
-macro_rules! impl_to_primitive_uint_to_int {
-    ($DstT:ty, $slf:expr) => (
-        {
-            let max_value: $DstT = Bounded::max_value();
-            if $slf as u64 <= max_value as u64 {
-                Some($slf as $DstT)
-            } else {
-                None
-            }
-        }
-    )
-}
-
-macro_rules! impl_to_primitive_uint_to_uint {
-    ($SrcT:ty, $DstT:ty, $slf:expr) => (
-        {
-            if size_of::<$SrcT>() <= size_of::<$DstT>() {
-                Some($slf as $DstT)
-            } else {
-                let zero: $SrcT = 0;
-                let max_value: $DstT = Bounded::max_value();
-                if zero <= $slf && $slf as u64 <= max_value as u64 {
-                    Some($slf as $DstT)
-                } else {
-                    None
-                }
-            }
-        }
-    )
-}
-
-macro_rules! impl_to_primitive_uint {
-    ($T:ty) => (
-        impl ToPrimitive for $T {
-            #[inline]
-            fn to_isize(&self) -> Option<isize> { impl_to_primitive_uint_to_int!(isize, *self) }
-            #[inline]
-            fn to_i8(&self) -> Option<i8> { impl_to_primitive_uint_to_int!(i8, *self) }
-            #[inline]
-            fn to_i16(&self) -> Option<i16> { impl_to_primitive_uint_to_int!(i16, *self) }
-            #[inline]
-            fn to_i32(&self) -> Option<i32> { impl_to_primitive_uint_to_int!(i32, *self) }
-            #[inline]
-            fn to_i64(&self) -> Option<i64> { impl_to_primitive_uint_to_int!(i64, *self) }
-
-            #[inline]
-            fn to_usize(&self) -> Option<usize> {
-                impl_to_primitive_uint_to_uint!($T, usize, *self)
-            }
-            #[inline]
-            fn to_u8(&self) -> Option<u8> { impl_to_primitive_uint_to_uint!($T, u8, *self) }
-            #[inline]
-            fn to_u16(&self) -> Option<u16> { impl_to_primitive_uint_to_uint!($T, u16, *self) }
-            #[inline]
-            fn to_u32(&self) -> Option<u32> { impl_to_primitive_uint_to_uint!($T, u32, *self) }
-            #[inline]
-            fn to_u64(&self) -> Option<u64> { impl_to_primitive_uint_to_uint!($T, u64, *self) }
-
-            #[inline]
-            fn to_f32(&self) -> Option<f32> { Some(*self as f32) }
-            #[inline]
-            fn to_f64(&self) -> Option<f64> { Some(*self as f64) }
-        }
-    )
-}
-
-impl_to_primitive_uint! { usize }
-impl_to_primitive_uint! { u8 }
-impl_to_primitive_uint! { u16 }
-impl_to_primitive_uint! { u32 }
-impl_to_primitive_uint! { u64 }
-
-macro_rules! impl_to_primitive_float_to_float {
-    ($SrcT:ident, $DstT:ident, $slf:expr) => (
-        if size_of::<$SrcT>() <= size_of::<$DstT>() {
-            Some($slf as $DstT)
-        } else {
-            let n = $slf as f64;
-            let max_value: $SrcT = ::core::$SrcT::MAX;
-            if -max_value as f64 <= n && n <= max_value as f64 {
-                Some($slf as $DstT)
-            } else {
-                None
-            }
-        }
-    )
-}
-
-macro_rules! impl_to_primitive_float {
-    ($T:ident) => (
-        impl ToPrimitive for $T {
-            #[inline]
-            fn to_isize(&self) -> Option<isize> { Some(*self as isize) }
-            #[inline]
-            fn to_i8(&self) -> Option<i8> { Some(*self as i8) }
-            #[inline]
-            fn to_i16(&self) -> Option<i16> { Some(*self as i16) }
-            #[inline]
-            fn to_i32(&self) -> Option<i32> { Some(*self as i32) }
-            #[inline]
-            fn to_i64(&self) -> Option<i64> { Some(*self as i64) }
-
-            #[inline]
-            fn to_usize(&self) -> Option<usize> { Some(*self as usize) }
-            #[inline]
-            fn to_u8(&self) -> Option<u8> { Some(*self as u8) }
-            #[inline]
-            fn to_u16(&self) -> Option<u16> { Some(*self as u16) }
-            #[inline]
-            fn to_u32(&self) -> Option<u32> { Some(*self as u32) }
-            #[inline]
-            fn to_u64(&self) -> Option<u64> { Some(*self as u64) }
-
-            #[inline]
-            fn to_f32(&self) -> Option<f32> { impl_to_primitive_float_to_float!($T, f32, *self) }
-            #[inline]
-            fn to_f64(&self) -> Option<f64> { impl_to_primitive_float_to_float!($T, f64, *self) }
-        }
-    )
-}
-
-impl_to_primitive_float! { f32 }
-impl_to_primitive_float! { f64 }
-
-pub trait FromPrimitive: Sized {
-    #[inline]
-    fn from_isize(n: isize) -> Option<Self> {
-        FromPrimitive::from_i64(n as i64)
-    }
-
-    #[inline]
-    fn from_i8(n: i8) -> Option<Self> {
-        FromPrimitive::from_i64(n as i64)
-    }
-
-    #[inline]
-    fn from_i16(n: i16) -> Option<Self> {
-        FromPrimitive::from_i64(n as i64)
-    }
-
-    #[inline]
-    fn from_i32(n: i32) -> Option<Self> {
-        FromPrimitive::from_i64(n as i64)
-    }
-
-    fn from_i64(n: i64) -> Option<Self>;
-
-    #[inline]
-    fn from_usize(n: usize) -> Option<Self> {
-        FromPrimitive::from_u64(n as u64)
-    }
-
-    #[inline]
-    fn from_u8(n: u8) -> Option<Self> {
-        FromPrimitive::from_u64(n as u64)
-    }
-
-    #[inline]
-    fn from_u16(n: u16) -> Option<Self> {
-        FromPrimitive::from_u64(n as u64)
-    }
-
-    #[inline]
-    fn from_u32(n: u32) -> Option<Self> {
-        FromPrimitive::from_u64(n as u64)
-    }
-
-    fn from_u64(n: u64) -> Option<Self>;
-
-    #[inline]
-    fn from_f32(n: f32) -> Option<Self> {
-        FromPrimitive::from_f64(n as f64)
-    }
-
-    #[inline]
-    fn from_f64(n: f64) -> Option<Self> {
-        FromPrimitive::from_i64(n as i64)
-    }
-}
-
-macro_rules! impl_from_primitive {
-    ($T:ty, $to_ty:ident) => (
-        impl FromPrimitive for $T {
-            #[inline] fn from_i8(n: i8) -> Option<$T> { n.$to_ty() }
-            #[inline] fn from_i16(n: i16) -> Option<$T> { n.$to_ty() }
-            #[inline] fn from_i32(n: i32) -> Option<$T> { n.$to_ty() }
-            #[inline] fn from_i64(n: i64) -> Option<$T> { n.$to_ty() }
-
-            #[inline] fn from_u8(n: u8) -> Option<$T> { n.$to_ty() }
-            #[inline] fn from_u16(n: u16) -> Option<$T> { n.$to_ty() }
-            #[inline] fn from_u32(n: u32) -> Option<$T> { n.$to_ty() }
-            #[inline] fn from_u64(n: u64) -> Option<$T> { n.$to_ty() }
-
-            #[inline] fn from_f32(n: f32) -> Option<$T> { n.$to_ty() }
-            #[inline] fn from_f64(n: f64) -> Option<$T> { n.$to_ty() }
-        }
-    )
-}
-
-impl_from_primitive! { isize, to_isize }
-impl_from_primitive! { i8, to_i8 }
-impl_from_primitive! { i16, to_i16 }
-impl_from_primitive! { i32, to_i32 }
-impl_from_primitive! { i64, to_i64 }
-impl_from_primitive! { usize, to_usize }
-impl_from_primitive! { u8, to_u8 }
-impl_from_primitive! { u16, to_u16 }
-impl_from_primitive! { u32, to_u32 }
-impl_from_primitive! { u64, to_u64 }
-impl_from_primitive! { f32, to_f32 }
-impl_from_primitive! { f64, to_f64 }

serde/src/de/private.rs

@@ -1,49 +0,0 @@
-use core::marker::PhantomData;
-
-use de::{Deserialize, Deserializer, Error, Visitor};
-
-#[cfg(any(feature = "std", feature = "collections"))]
-pub use de::content::{
-    Content,
-    ContentRefDeserializer,
-    ContentDeserializer,
-    TaggedContentVisitor,
-    InternallyTaggedUnitVisitor,
-    UntaggedUnitVisitor,
-};
-
-/// If the missing field is of type `Option<T>` then treat is as `None`,
-/// otherwise it is an error.
-pub fn missing_field<V, E>(field: &'static str) -> Result<V, E>
-    where V: Deserialize,
-          E: Error
-{
-    struct MissingFieldDeserializer<E>(&'static str, PhantomData<E>);
-
-    impl<E> Deserializer for MissingFieldDeserializer<E>
-        where E: Error
-    {
-        type Error = E;
-
-        fn deserialize<V>(self, _visitor: V) -> Result<V::Value, E>
-            where V: Visitor
-        {
-            Err(Error::missing_field(self.0))
-        }
-
-        fn deserialize_option<V>(self, visitor: V) -> Result<V::Value, E>
-            where V: Visitor
-        {
-            visitor.visit_none()
-        }
-
-        forward_to_deserialize! {
-            bool u8 u16 u32 u64 i8 i16 i32 i64 f32 f64 char str string unit seq
-            seq_fixed_size bytes byte_buf map unit_struct newtype_struct
-            tuple_struct struct struct_field tuple enum ignored_any
-        }
-    }
-
-    let deserializer = MissingFieldDeserializer(field, PhantomData);
-    Deserialize::deserialize(deserializer)
-}

serde/src/error.rs

@@ -1,15 +0,0 @@
-//! A stand-in for `std::error`
-use core::fmt::{Debug, Display};
-
-/// A stand-in for `std::error::Error`, which requires no allocation.
-pub trait Error: Debug + Display {
-    /// A short description of the error.
-    ///
-    /// The description should not contain newlines or sentence-ending
-    /// punctuation, to facilitate embedding in larger user-facing
-    /// strings.
-    fn description(&self) -> &str;
-
-    /// The lower-level cause of this error, if any.
-    fn cause(&self) -> Option<&Error> { None }
-}

serde/src/export.rs

@@ -1,34 +0,0 @@
-#[cfg(all(feature = "collections", not(feature = "std")))]
-use collections::String;
-
-#[cfg(feature = "std")]
-use std::borrow::Cow;
-#[cfg(all(feature = "collections", not(feature = "std")))]
-use collections::borrow::Cow;
-
-pub use core::default::Default;
-pub use core::fmt;
-pub use core::marker::PhantomData;
-pub use core::option::Option::{self, None, Some};
-pub use core::result::Result::{self, Ok, Err};
-
-#[cfg(any(feature = "collections", feature = "std"))]
-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 = "collections", feature = "std")))]
-pub fn from_utf8_lossy(bytes: &[u8]) -> &str {
-    use core::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/iter.rs

@@ -1,9 +1,6 @@
-//! Module that contains helper iterators.
-
 use std::io;
 use std::iter::Peekable;
 
-/// Iterator over a byte stream that tracks the current position's line and column.
 pub struct LineColIterator<Iter: Iterator<Item=io::Result<u8>>> {
     iter: Iter,
     line: usize,
@@ -11,7 +8,6 @@ pub struct LineColIterator<Iter: Iterator<Item=io::Result<u8>>> {
 }
 
 impl<Iter: Iterator<Item=io::Result<u8>>> LineColIterator<Iter> {
-    /// Construct a new `LineColIterator<Iter>`.
     pub fn new(iter: Iter) -> LineColIterator<Iter> {
         LineColIterator {
             iter: iter,

serde/src/json/builder.rs

@@ -0,0 +1,84 @@
+// 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
+    }
+}

serde/src/json/de.rs

@@ -0,0 +1,694 @@
+use std::char;
+use std::i32;
+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>,
+}
+
+macro_rules! try_or_invalid {
+    ($self_:expr, $e:expr) => {
+        match $e {
+            Some(v) => v,
+            None => { return Err($self_.error(ErrorCode::InvalidNumber)); }
+        }
+    }
+}
+
+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 accum: u64 = 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' => {
+                            accum = try_or_invalid!(self, accum.checked_mul(10));
+                            accum = try_or_invalid!(self, accum.checked_add((c as u64) - ('0' as u64)));
+
+                            try!(self.bump());
+                        }
+                        _ => break,
+                    }
+                }
+            }
+            _ => { return Err(self.error(ErrorCode::InvalidNumber)); }
+        }
+
+        Ok(accum)
+    }
+
+    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: u64 = 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 = try_or_invalid!(self, exp.checked_mul(10));
+                    exp = try_or_invalid!(self, exp.checked_add((c as u64) - (b'0' as u64)));
+
+                    try!(self.bump());
+                }
+                _ => break
+            }
+        }
+
+        let exp = if exp <= i32::MAX as u64 {
+            10_f64.powi(exp as i32)
+        } else {
+            return Err(self.error(ErrorCode::InvalidNumber));
+        };
+
+        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();
+
+        loop {
+            let ch = match try!(self.next_char()) {
+                Some(ch) => ch,
+                None => { return Err(self.error(ErrorCode::EOFWhileParsingString)); }
+            };
+
+            match ch {
+                b'"' => {
+                    try!(self.bump());
+                    return Ok(());
+                }
+                b'\\' => {
+                    let ch = match try!(self.next_char()) {
+                        Some(ch) => ch,
+                        None => { return Err(self.error(ErrorCode::EOFWhileParsingString)); }
+                    };
+
+                    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));
+                        }
+                    }
+                }
+                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))
+        }
+    }
+
+    #[inline]
+    fn format() -> &'static str {
+        "json"
+    }
+}
+
+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())
+}

serde/src/json/error.rs

@@ -0,0 +1,185 @@
+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)
+    }
+}

serde/src/json/mod.rs

@@ -0,0 +1,113 @@
+//! 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;

serde/src/json/ser.rs

@@ -0,0 +1,524 @@
+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)
+    }
+
+    #[inline]
+    fn format() -> &'static str {
+        "json"
+    }
+}
+
+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(())
+}

serde/src/json/value.rs

@@ -0,0 +1,915 @@
+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 {
+            match target.find(key) {
+                Some(t) => { target = t; },
+                None => return None
+            }
+        }
+        Some(target)
+    }
+
+    /// Looks up a value by path.
+    ///
+    /// This is a convenience method that splits the path by `'.'`
+    /// and then feeds the sequence of keys into the `find_path`
+    /// method.
+    ///
+    /// ``` ignore
+    /// let obj: Value = json::from_str(r#"{"x": {"a": 1}}"#).unwrap();
+    ///
+    /// assert!(obj.lookup("x.a").unwrap() == &Value::U64(1));
+    /// ```
+    pub fn lookup<'a>(&'a self, path: &str) -> Option<&'a Value> {
+        let mut target = self;
+        for key in path.split('.') {
+            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(())
+    }
+
+    #[inline]
+    fn format() -> &'static str {
+        "json"
+    }
+}
+
+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)
+        }
+    }
+
+    #[inline]
+    fn format() -> &'static str {
+        "json"
+    }
+}
+
+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)
+}

serde/src/lib.rs

@@ -1,107 +1,19 @@
-//! # Serde
+//! Serde Serialization Framework
 //!
-//! 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.
-//!
-//! ### 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 code
-//! generation to automatically derive 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 roughly 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](https://github.com/serde-rs/json), the ubiquitous JavaScript Object
-//!   Notation used by many HTTP APIs.
-//! - [Bincode](https://github.com/TyOverby/bincode), a compact binary format
-//!   used for IPC within the Servo rendering engine.
-//! - [CBOR](https://github.com/pyfisch/cbor), a Concise Binary Object
-//!   Representation designed for small message size without the need for
-//!   version negotiation.
-//! - [YAML](https://github.com/dtolnay/serde-yaml), a popular human-friendly
-//!   configuration language that ain't markup language.
-//! - [MessagePack](https://github.com/3Hren/msgpack-rust), an efficient binary
-//!   format that resembles a compact JSON.
-//! - [TOML](https://github.com/alexcrichton/toml-rs), a minimal configuration
-//!   format used by [Cargo](http://doc.crates.io/manifest.html).
-//! - [Pickle](https://github.com/birkenfeld/serde-pickle), a format common in
-//!   the Python world.
-//! - [Hjson](https://github.com/laktak/hjson-rust), a variant of JSON designed
-//!   to be readable and writable by humans.
-//! - [BSON](https://github.com/zonyitoo/bson-rs), the data storage and network
-//!   transfer format used by MongoDB.
-//! - [URL](https://github.com/nox/serde_urlencoded), the x-www-form-urlencoded
-//!   format.
-//! - [XML](https://github.com/serde-rs/xml), the flexible machine-friendly W3C
-//!   standard. *(deserialization only)*
-//! - [Envy](https://github.com/softprops/envy), a way to deserialize
-//!   environment variables into Rust structs. *(deserialization only)*
-//! - [Redis](https://github.com/OneSignal/serde-redis), deserialize values from
-//!   Redis when using [redis-rs](https://crates.io/crates/redis).
-//!   *(deserialization only)*
+//! 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")]
 
-#![doc(html_root_url="https://docs.serde.rs")]
-#![cfg_attr(not(feature = "std"), no_std)]
-#![cfg_attr(feature = "unstable", feature(inclusive_range, nonzero, specialization, zero_one))]
-#![cfg_attr(feature = "alloc", feature(alloc))]
-#![cfg_attr(feature = "collections", feature(collections))]
-#![cfg_attr(feature = "cargo-clippy", allow(linkedlist, type_complexity, doc_markdown))]
-#![deny(missing_docs)]
+extern crate num;
 
-#[cfg(feature = "collections")]
-extern crate collections;
-
-#[cfg(feature = "alloc")]
-extern crate alloc;
-
-#[cfg(feature = "unstable")]
-extern crate core as actual_core;
-
-#[cfg(feature = "std")]
-mod core {
-    pub use std::{ops, hash, fmt, cmp, marker, mem, i8, i16, i32, i64, u8, u16, u32, u64, isize,
-            usize, f32, f64, char, str, num, slice, iter, cell, default, result, option};
-    #[cfg(feature = "unstable")]
-    pub use actual_core::nonzero;
-}
-
-#[doc(inline)]
 pub use ser::{Serialize, Serializer};
-#[doc(inline)]
-pub use de::{Deserialize, Deserializer};
-
-#[macro_use]
-mod macros;
+pub use de::{Deserialize, Deserializer, Error};
 
 pub mod bytes;
 pub mod de;
-#[cfg(feature = "std")]
-#[doc(hidden)]
 pub mod iter;
+pub mod json;
 pub mod ser;
-#[cfg_attr(feature = "std", doc(hidden))]
-pub mod error;
-mod utils;
-
-// Generated code uses these to support no_std. Not public API.
-#[doc(hidden)]
-pub mod export;

serde/src/macros.rs

@@ -1,190 +0,0 @@
-#[cfg(feature = "std")]
-#[doc(hidden)]
-#[macro_export]
-macro_rules! forward_to_deserialize_method {
-    ($func:ident($($arg:ty),*)) => {
-        #[inline]
-        fn $func<__V>(self, $(_: $arg,)* visitor: __V) -> ::std::result::Result<__V::Value, Self::Error>
-            where __V: $crate::de::Visitor
-        {
-            self.deserialize(visitor)
-        }
-    };
-}
-
-#[cfg(not(feature = "std"))]
-#[doc(hidden)]
-#[macro_export]
-macro_rules! forward_to_deserialize_method {
-    ($func:ident($($arg:ty),*)) => {
-        #[inline]
-        fn $func<__V>(self, $(_: $arg,)* visitor: __V) -> ::core::result::Result<__V::Value, Self::Error>
-            where __V: $crate::de::Visitor
-        {
-            self.deserialize(visitor)
-        }
-    };
-}
-
-#[doc(hidden)]
-#[macro_export]
-macro_rules! forward_to_deserialize_helper {
-    (bool) => {
-        forward_to_deserialize_method!{deserialize_bool()}
-    };
-    (u8) => {
-        forward_to_deserialize_method!{deserialize_u8()}
-    };
-    (u16) => {
-        forward_to_deserialize_method!{deserialize_u16()}
-    };
-    (u32) => {
-        forward_to_deserialize_method!{deserialize_u32()}
-    };
-    (u64) => {
-        forward_to_deserialize_method!{deserialize_u64()}
-    };
-    (i8) => {
-        forward_to_deserialize_method!{deserialize_i8()}
-    };
-    (i16) => {
-        forward_to_deserialize_method!{deserialize_i16()}
-    };
-    (i32) => {
-        forward_to_deserialize_method!{deserialize_i32()}
-    };
-    (i64) => {
-        forward_to_deserialize_method!{deserialize_i64()}
-    };
-    (f32) => {
-        forward_to_deserialize_method!{deserialize_f32()}
-    };
-    (f64) => {
-        forward_to_deserialize_method!{deserialize_f64()}
-    };
-    (char) => {
-        forward_to_deserialize_method!{deserialize_char()}
-    };
-    (str) => {
-        forward_to_deserialize_method!{deserialize_str()}
-    };
-    (string) => {
-        forward_to_deserialize_method!{deserialize_string()}
-    };
-    (unit) => {
-        forward_to_deserialize_method!{deserialize_unit()}
-    };
-    (option) => {
-        forward_to_deserialize_method!{deserialize_option()}
-    };
-    (seq) => {
-        forward_to_deserialize_method!{deserialize_seq()}
-    };
-    (seq_fixed_size) => {
-        forward_to_deserialize_method!{deserialize_seq_fixed_size(usize)}
-    };
-    (bytes) => {
-        forward_to_deserialize_method!{deserialize_bytes()}
-    };
-    (byte_buf) => {
-        forward_to_deserialize_method!{deserialize_byte_buf()}
-    };
-    (map) => {
-        forward_to_deserialize_method!{deserialize_map()}
-    };
-    (unit_struct) => {
-        forward_to_deserialize_method!{deserialize_unit_struct(&'static str)}
-    };
-    (newtype_struct) => {
-        forward_to_deserialize_method!{deserialize_newtype_struct(&'static str)}
-    };
-    (tuple_struct) => {
-        forward_to_deserialize_method!{deserialize_tuple_struct(&'static str, usize)}
-    };
-    (struct) => {
-        forward_to_deserialize_method!{deserialize_struct(&'static str, &'static [&'static str])}
-    };
-    (struct_field) => {
-        forward_to_deserialize_method!{deserialize_struct_field()}
-    };
-    (tuple) => {
-        forward_to_deserialize_method!{deserialize_tuple(usize)}
-    };
-    (enum) => {
-        forward_to_deserialize_method!{deserialize_enum(&'static str, &'static [&'static str])}
-    };
-    (ignored_any) => {
-        forward_to_deserialize_method!{deserialize_ignored_any()}
-    };
-}
-
-// 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.
-///
-/// ```rust
-/// # #[macro_use] extern crate serde;
-/// # use serde::de::{value, Deserializer, Visitor};
-/// # pub struct MyDeserializer;
-/// # impl Deserializer for MyDeserializer {
-/// #     type Error = value::Error;
-/// #     fn deserialize<V>(self, _: V) -> Result<V::Value, Self::Error>
-/// #         where V: Visitor
-/// #     { unimplemented!() }
-/// #
-/// #[inline]
-/// fn deserialize_bool<V>(self, visitor: V) -> Result<V::Value, Self::Error>
-///     where V: Visitor
-/// {
-///     self.deserialize(visitor)
-/// }
-/// #     forward_to_deserialize! {
-/// #         u8 u16 u32 u64 i8 i16 i32 i64 f32 f64 char str string unit option
-/// #         seq seq_fixed_size bytes byte_buf map unit_struct newtype_struct
-/// #         tuple_struct struct struct_field tuple enum ignored_any
-/// #     }
-/// # }
-/// # fn main() {}
-/// ```
-///
-/// The `forward_to_deserialize!` macro implements these simple forwarding
-/// methods so that they forward directly to `Deserializer::deserialize`. You
-/// can choose which methods to forward.
-///
-/// ```rust
-/// # #[macro_use] extern crate serde;
-/// # use serde::de::{value, Deserializer, Visitor};
-/// # pub struct MyDeserializer;
-/// impl Deserializer for MyDeserializer {
-/// #   type Error = value::Error;
-///     fn deserialize<V>(self, visitor: V) -> Result<V::Value, Self::Error>
-///         where V: Visitor
-///     {
-///         /* ... */
-/// #       let _ = visitor;
-/// #       unimplemented!()
-///     }
-///
-///     forward_to_deserialize! {
-///         bool u8 u16 u32 u64 i8 i16 i32 i64 f32 f64 char str string unit option
-///         seq seq_fixed_size bytes byte_buf map unit_struct newtype_struct
-///         tuple_struct struct struct_field tuple enum ignored_any
-///     }
-/// }
-/// # fn main() {}
-/// ```
-#[macro_export]
-macro_rules! forward_to_deserialize {
-    ($($func:ident)*) => {
-        $(forward_to_deserialize_helper!{$func})*
-    };
-}

serde/src/ser/impls.rs

@@ -1,116 +1,60 @@
-#[cfg(feature = "std")]
-use std::borrow::Cow;
-#[cfg(all(feature = "collections", not(feature = "std")))]
-use collections::borrow::Cow;
-
-#[cfg(feature = "std")]
-use std::collections::{
-    BinaryHeap,
-    BTreeMap,
-    BTreeSet,
-    LinkedList,
-    HashMap,
-    HashSet,
-    VecDeque,
-};
-#[cfg(all(feature = "collections", not(feature = "std")))]
-use collections::{
-    BinaryHeap,
-    BTreeMap,
-    BTreeSet,
-    LinkedList,
-    VecDeque,
-    String,
-    Vec,
-};
-
-#[cfg(feature = "collections")]
-use collections::borrow::ToOwned;
-
-#[cfg(feature = "std")]
-use core::hash::{Hash, BuildHasher};
-#[cfg(feature = "unstable")]
-use core::iter;
-#[cfg(feature = "std")]
-use std::net;
-#[cfg(feature = "unstable")]
-use core::ops;
-#[cfg(feature = "std")]
+use std::collections::{BTreeMap, BTreeSet, HashMap, HashSet};
+use std::hash::Hash;
 use std::path;
-#[cfg(feature = "std")]
 use std::rc::Rc;
-#[cfg(all(feature = "alloc", not(feature = "std")))]
-use alloc::rc::Rc;
-#[cfg(feature = "std")]
-use std::time::Duration;
-
-#[cfg(feature = "std")]
 use std::sync::Arc;
-#[cfg(all(feature = "alloc", not(feature = "std")))]
-use alloc::arc::Arc;
-
-#[cfg(all(feature = "alloc", not(feature = "std")))]
-use alloc::boxed::Box;
-
-use core::marker::PhantomData;
-
-#[cfg(feature = "unstable")]
-use core::nonzero::{NonZero, Zeroable};
 
 use super::{
     Serialize,
-    SerializeSeq,
-    SerializeTuple,
     Serializer,
+    SeqVisitor,
+    MapVisitor,
 };
-#[cfg(feature = "std")]
-use super::Error;
 
 ///////////////////////////////////////////////////////////////////////////////
 
 macro_rules! impl_visit {
-    ($ty:ty, $method:ident $($cast:tt)*) => {
+    ($ty:ty, $method:ident) => {
         impl Serialize for $ty {
             #[inline]
-            fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+            fn serialize<S>(&self, serializer: &mut S) -> Result<(), S::Error>
                 where S: Serializer,
             {
-                serializer.$method(*self $($cast)*)
+                serializer.$method(*self)
             }
         }
     }
 }
 
-impl_visit!(bool, serialize_bool);
-impl_visit!(isize, serialize_i64 as i64);
-impl_visit!(i8, serialize_i8);
-impl_visit!(i16, serialize_i16);
-impl_visit!(i32, serialize_i32);
-impl_visit!(i64, serialize_i64);
-impl_visit!(usize, serialize_u64 as u64);
-impl_visit!(u8, serialize_u8);
-impl_visit!(u16, serialize_u16);
-impl_visit!(u32, serialize_u32);
-impl_visit!(u64, serialize_u64);
-impl_visit!(f32, serialize_f32);
-impl_visit!(f64, serialize_f64);
-impl_visit!(char, serialize_char);
+impl_visit!(bool, visit_bool);
+impl_visit!(isize, visit_isize);
+impl_visit!(i8, visit_i8);
+impl_visit!(i16, visit_i16);
+impl_visit!(i32, visit_i32);
+impl_visit!(i64, visit_i64);
+impl_visit!(usize, visit_usize);
+impl_visit!(u8, visit_u8);
+impl_visit!(u16, visit_u16);
+impl_visit!(u32, visit_u32);
+impl_visit!(u64, visit_u64);
+impl_visit!(f32, visit_f32);
+impl_visit!(f64, visit_f64);
+impl_visit!(char, visit_char);
 
 ///////////////////////////////////////////////////////////////////////////////
 
 impl Serialize for str {
     #[inline]
-    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    fn serialize<S>(&self, serializer: &mut S) -> Result<(), S::Error>
         where S: Serializer,
     {
-        serializer.serialize_str(self)
+        serializer.visit_str(self)
     }
 }
 
-#[cfg(any(feature = "std", feature = "collections"))]
 impl Serialize for String {
     #[inline]
-    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    fn serialize<S>(&self, serializer: &mut S) -> Result<(), S::Error>
         where S: Serializer,
     {
         (&self[..]).serialize(serializer)
@@ -119,45 +63,81 @@ impl Serialize for String {
 
 ///////////////////////////////////////////////////////////////////////////////
 
-impl<T> Serialize for Option<T>
-    where T: Serialize
-{
+impl<T> Serialize for Option<T> where T: Serialize {
     #[inline]
-    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    fn serialize<S>(&self, serializer: &mut S) -> Result<(), S::Error>
         where S: Serializer,
     {
         match *self {
-            Some(ref value) => serializer.serialize_some(value),
-            None => serializer.serialize_none(),
+            Some(ref value) => serializer.visit_some(value),
+            None => serializer.visit_none(),
         }
     }
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
-impl<T> Serialize for PhantomData<T> {
+pub struct SeqIteratorVisitor<Iter> {
+    iter: Iter,
+    len: Option<usize>,
+}
+
+impl<T, Iter> SeqIteratorVisitor<Iter>
+    where Iter: Iterator<Item=T>
+{
     #[inline]
-    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    pub fn new(iter: Iter, len: Option<usize>) -> SeqIteratorVisitor<Iter> {
+        SeqIteratorVisitor {
+            iter: iter,
+            len: len,
+        }
+    }
+}
+
+impl<T, Iter> SeqVisitor for SeqIteratorVisitor<Iter>
+    where T: Serialize,
+          Iter: Iterator<Item=T>,
+{
+    #[inline]
+    fn visit<S>(&mut self, serializer: &mut S) -> Result<Option<()>, S::Error>
         where S: Serializer,
     {
-        serializer.serialize_unit_struct("PhantomData")
+        match self.iter.next() {
+            Some(value) => {
+                let value = try!(serializer.visit_seq_elt(value));
+                Ok(Some(value))
+            }
+            None => Ok(None),
+        }
+    }
+
+    #[inline]
+    fn len(&self) -> Option<usize> {
+        self.len
     }
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
+impl<'a, T> Serialize for &'a [T]
+    where T: Serialize,
+{
+    #[inline]
+    fn serialize<S>(&self, serializer: &mut S) -> Result<(), S::Error>
+        where S: Serializer,
+    {
+        serializer.visit_seq(SeqIteratorVisitor::new(self.iter(), Some(self.len())))
+    }
+}
+
 macro_rules! array_impls {
     ($len:expr) => {
         impl<T> Serialize for [T; $len] where T: Serialize {
             #[inline]
-            fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+            fn serialize<S>(&self, serializer: &mut S) -> Result<(), S::Error>
                 where S: Serializer,
             {
-                let mut seq = try!(serializer.serialize_seq_fixed_size($len));
-                for e in self {
-                    try!(seq.serialize_element(e));
-                }
-                seq.end()
+                serializer.visit_seq(SeqIteratorVisitor::new(self.iter(), Some($len)))
             }
         }
     }
@@ -197,99 +177,34 @@ array_impls!(30);
 array_impls!(31);
 array_impls!(32);
 
-///////////////////////////////////////////////////////////////////////////////
-
-macro_rules! serialize_seq {
-    () => {
-        #[inline]
-        fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
-            where S: Serializer,
-        {
-            serializer.collect_seq(self)
-        }
+impl<T> Serialize for Vec<T> where T: Serialize {
+    #[inline]
+    fn serialize<S>(&self, serializer: &mut S) -> Result<(), S::Error>
+        where S: Serializer,
+    {
+        (&self[..]).serialize(serializer)
     }
 }
 
-impl<T> Serialize for [T]
-    where T: Serialize,
-{
-    serialize_seq!();
-}
-
-#[cfg(any(feature = "std", feature = "collections"))]
-impl<T> Serialize for BinaryHeap<T>
-    where T: Serialize + Ord
-{
-    serialize_seq!();
-}
-
-#[cfg(any(feature = "std", feature = "collections"))]
 impl<T> Serialize for BTreeSet<T>
     where T: Serialize + Ord,
-{
-    serialize_seq!();
-}
-
-#[cfg(feature = "std")]
-impl<T, H> Serialize for HashSet<T, H>
-    where T: Serialize + Eq + Hash,
-          H: BuildHasher,
-{
-    serialize_seq!();
-}
-
-#[cfg(any(feature = "std", feature = "collections"))]
-impl<T> Serialize for LinkedList<T>
-    where T: Serialize,
-{
-    serialize_seq!();
-}
-
-#[cfg(any(feature = "std", feature = "collections"))]
-impl<T> Serialize for Vec<T>
-    where T: Serialize
-{
-    serialize_seq!();
-}
-
-#[cfg(any(feature = "std", feature = "collections"))]
-impl<T> Serialize for VecDeque<T>
-    where T: Serialize
-{
-    serialize_seq!();
-}
-
-#[cfg(feature = "unstable")]
-impl<A> Serialize for ops::Range<A>
-    where ops::Range<A>: ExactSizeIterator + iter::Iterator<Item = A> + Clone,
-          A: Serialize,
 {
     #[inline]
-    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    fn serialize<S>(&self, serializer: &mut S) -> Result<(), S::Error>
         where S: Serializer,
     {
-        let mut seq = try!(serializer.serialize_seq(Some(self.len())));
-        for e in self.clone() {
-            try!(seq.serialize_element(&e));
-        }
-        seq.end()
+        serializer.visit_seq(SeqIteratorVisitor::new(self.iter(), Some(self.len())))
     }
 }
 
-#[cfg(feature = "unstable")]
-impl<A> Serialize for ops::RangeInclusive<A>
-    where ops::RangeInclusive<A>: ExactSizeIterator + iter::Iterator<Item = A> + Clone,
-          A: Serialize,
+impl<T> Serialize for HashSet<T>
+    where T: Serialize + Eq + Hash,
 {
     #[inline]
-    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    fn serialize<S>(&self, serializer: &mut S) -> Result<(), S::Error>
         where S: Serializer,
     {
-        let mut seq = try!(serializer.serialize_seq(Some(self.len())));
-        for e in self.clone() {
-            try!(seq.serialize_element(&e));
-        }
-        seq.end()
+        serializer.visit_seq(SeqIteratorVisitor::new(self.iter(), Some(self.len())))
     }
 }
 
@@ -297,15 +212,20 @@ impl<A> Serialize for ops::RangeInclusive<A>
 
 impl Serialize for () {
     #[inline]
-    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    fn serialize<S>(&self, serializer: &mut S) -> Result<(), S::Error>
         where S: Serializer,
     {
-        serializer.serialize_unit()
+        serializer.visit_unit()
     }
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
+// FIXME(rust #19630) Remove this work-around
+macro_rules! e {
+    ($e:expr) => { $e }
+}
+
 macro_rules! tuple_impls {
     ($(
         $TupleVisitor:ident ($len:expr, $($T:ident),+) {
@@ -313,18 +233,50 @@ macro_rules! tuple_impls {
         }
     )+) => {
         $(
+            pub struct $TupleVisitor<'a, $($T: 'a),+> {
+                tuple: &'a ($($T,)+),
+                state: u8,
+            }
+
+            impl<'a, $($T: 'a),+> $TupleVisitor<'a, $($T),+> {
+                pub fn new(tuple: &'a ($($T,)+)) -> $TupleVisitor<'a, $($T),+> {
+                    $TupleVisitor {
+                        tuple: tuple,
+                        state: 0,
+                    }
+                }
+            }
+
+            impl<'a, $($T),+> SeqVisitor for $TupleVisitor<'a, $($T),+>
+                where $($T: Serialize),+
+            {
+                fn visit<S>(&mut self, serializer: &mut S) -> Result<Option<()>, S::Error>
+                    where S: Serializer,
+                {
+                    match self.state {
+                        $(
+                            $state => {
+                                self.state += 1;
+                                Ok(Some(try!(serializer.visit_seq_elt(&e!(self.tuple.$idx)))))
+                            }
+                        )+
+                        _ => {
+                            Ok(None)
+                        }
+                    }
+                }
+
+                fn len(&self) -> Option<usize> {
+                    Some($len)
+                }
+            }
+
             impl<$($T),+> Serialize for ($($T,)+)
                 where $($T: Serialize),+
             {
                 #[inline]
-                fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
-                    where S: Serializer,
-                {
-                    let mut tuple = try!(serializer.serialize_tuple($len));
-                    $(
-                        try!(tuple.serialize_element(&self.$idx));
-                    )+
-                    tuple.end()
+                fn serialize<S: Serializer>(&self, serializer: &mut S) -> Result<(), S::Error> {
+                    serializer.visit_seq($TupleVisitor::new(self))
                 }
             }
         )+
@@ -434,109 +386,96 @@ tuple_impls! {
         10 => 10,
         11 => 11,
     }
-    TupleVisitor13 (13, T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12) {
-        0 => 0,
-        1 => 1,
-        2 => 2,
-        3 => 3,
-        4 => 4,
-        5 => 5,
-        6 => 6,
-        7 => 7,
-        8 => 8,
-        9 => 9,
-        10 => 10,
-        11 => 11,
-        12 => 12,
+}
+
+///////////////////////////////////////////////////////////////////////////////
+
+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,
+        }
     }
-    TupleVisitor14 (14, T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13) {
-        0 => 0,
-        1 => 1,
-        2 => 2,
-        3 => 3,
-        4 => 4,
-        5 => 5,
-        6 => 6,
-        7 => 7,
-        8 => 8,
-        9 => 9,
-        10 => 10,
-        11 => 11,
-        12 => 12,
-        13 => 13,
+}
+
+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)
+        }
     }
-    TupleVisitor15 (15, T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14) {
-        0 => 0,
-        1 => 1,
-        2 => 2,
-        3 => 3,
-        4 => 4,
-        5 => 5,
-        6 => 6,
-        7 => 7,
-        8 => 8,
-        9 => 9,
-        10 => 10,
-        11 => 11,
-        12 => 12,
-        13 => 13,
-        14 => 14,
-    }
-    TupleVisitor16 (16, T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15) {
-        0 => 0,
-        1 => 1,
-        2 => 2,
-        3 => 3,
-        4 => 4,
-        5 => 5,
-        6 => 6,
-        7 => 7,
-        8 => 8,
-        9 => 9,
-        10 => 10,
-        11 => 11,
-        12 => 12,
-        13 => 13,
-        14 => 14,
-        15 => 15,
+
+    #[inline]
+    fn len(&self) -> Option<usize> {
+        self.len
     }
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
-macro_rules! serialize_map {
-    () => {
-        #[inline]
-        fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
-            where S: Serializer,
-        {
-            serializer.collect_map(self)
-        }
-    }
-}
-
-#[cfg(any(feature = "std", feature = "collections"))]
 impl<K, V> Serialize for BTreeMap<K, V>
     where K: Serialize + Ord,
           V: Serialize,
 {
-    serialize_map!();
+    #[inline]
+    fn serialize<S>(&self, serializer: &mut S) -> Result<(), S::Error>
+        where S: Serializer,
+    {
+        serializer.visit_map(MapIteratorVisitor::new(self.iter(), Some(self.len())))
+    }
 }
 
-#[cfg(feature = "std")]
-impl<K, V, H> Serialize for HashMap<K, V, H>
+impl<K, V> Serialize for HashMap<K, V>
     where K: Serialize + Eq + Hash,
           V: Serialize,
-          H: BuildHasher,
 {
-    serialize_map!();
+    #[inline]
+    fn serialize<S>(&self, serializer: &mut S) -> Result<(), S::Error>
+        where S: Serializer,
+    {
+        serializer.visit_map(MapIteratorVisitor::new(self.iter(), Some(self.len())))
+    }
 }
 
+// FIXME: `VecMap` is unstable.
+/*
+impl<V> Serialize for VecMap<V>
+    where 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())))
+    }
+}
+*/
+
 ///////////////////////////////////////////////////////////////////////////////
 
 impl<'a, T: ?Sized> Serialize for &'a T where T: Serialize {
     #[inline]
-    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    fn serialize<S>(&self, serializer: &mut S) -> Result<(), S::Error>
         where S: Serializer,
     {
         (**self).serialize(serializer)
@@ -545,55 +484,34 @@ impl<'a, T: ?Sized> Serialize for &'a T where T: Serialize {
 
 impl<'a, T: ?Sized> Serialize for &'a mut T where T: Serialize {
     #[inline]
-    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    fn serialize<S>(&self, serializer: &mut S) -> Result<(), S::Error>
         where S: Serializer,
     {
         (**self).serialize(serializer)
     }
 }
 
-#[cfg(any(feature = "std", feature = "alloc"))]
-impl<T: ?Sized> Serialize for Box<T>
-    where T: Serialize
-{
+impl<T: ?Sized> Serialize for Box<T> where T: Serialize {
     #[inline]
-    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    fn serialize<S>(&self, serializer: &mut S) -> Result<(), S::Error>
         where S: Serializer,
     {
         (**self).serialize(serializer)
     }
 }
 
-#[cfg(any(feature = "std", feature = "alloc"))]
-impl<T> Serialize for Rc<T>
-    where T: Serialize
-{
+impl<T> Serialize for Rc<T> where T: Serialize, {
     #[inline]
-    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    fn serialize<S>(&self, serializer: &mut S) -> Result<(), S::Error>
         where S: Serializer,
     {
         (**self).serialize(serializer)
     }
 }
 
-#[cfg(any(feature = "std", feature = "alloc"))]
-impl<T> Serialize for Arc<T>
-    where T: Serialize
-{
+impl<T> Serialize for Arc<T> where T: Serialize, {
     #[inline]
-    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
-        where S: Serializer,
-    {
-        (**self).serialize(serializer)
-    }
-}
-
-#[cfg(any(feature = "std", feature = "collections"))]
-impl<'a, T: ?Sized> Serialize for Cow<'a, T>
-    where T: Serialize + ToOwned
-{
-    #[inline]
-    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    fn serialize<S>(&self, serializer: &mut S) -> Result<(), S::Error>
         where S: Serializer,
     {
         (**self).serialize(serializer)
@@ -602,130 +520,18 @@ impl<'a, T: ?Sized> Serialize for Cow<'a, T>
 
 ///////////////////////////////////////////////////////////////////////////////
 
-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(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 net::IpAddr {
-    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
-        where S: Serializer,
-    {
-        self.to_string().serialize(serializer)
-    }
-}
-
-#[cfg(feature = "std")]
-impl Serialize for net::Ipv4Addr {
-    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
-        where S: Serializer,
-    {
-        self.to_string().serialize(serializer)
-    }
-}
-
-#[cfg(feature = "std")]
-impl Serialize for net::Ipv6Addr {
-    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
-        where S: Serializer,
-    {
-        self.to_string().serialize(serializer)
-    }
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-#[cfg(feature = "std")]
-impl Serialize for net::SocketAddr {
-    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
-        where S: Serializer,
-    {
-        match *self {
-            net::SocketAddr::V4(ref addr) => addr.serialize(serializer),
-            net::SocketAddr::V6(ref addr) => addr.serialize(serializer),
-        }
-    }
-}
-
-#[cfg(feature = "std")]
-impl Serialize for net::SocketAddrV4 {
-    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
-        where S: Serializer,
-    {
-        self.to_string().serialize(serializer)
-    }
-}
-
-#[cfg(feature = "std")]
-impl Serialize for net::SocketAddrV6 {
-    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
-        where S: Serializer,
-    {
-        self.to_string().serialize(serializer)
-    }
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-#[cfg(feature = "std")]
 impl Serialize for path::Path {
-    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    fn serialize<S>(&self, serializer: &mut S) -> Result<(), S::Error>
         where S: Serializer,
     {
-        match self.to_str() {
-            Some(s) => s.serialize(serializer),
-            None => Err(Error::custom("path contains invalid UTF-8 characters")),
-        }
+        self.to_str().unwrap().serialize(serializer)
     }
 }
 
-#[cfg(feature = "std")]
 impl Serialize for path::PathBuf {
-    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    fn serialize<S>(&self, serializer: &mut S) -> Result<(), S::Error>
         where S: Serializer,
     {
-        self.as_path().serialize(serializer)
-    }
-}
-
-#[cfg(feature = "unstable")]
-impl<T> Serialize for NonZero<T>
-    where T: Serialize + Zeroable
-{
-    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
-        where S: Serializer
-    {
-        (**self).serialize(serializer)
+        self.to_str().unwrap().serialize(serializer)
     }
 }

serde/src/ser/impossible.rs

@@ -1,177 +0,0 @@
-//! This module contains `Impossible` serializer and its implementations.
-
-use core::marker::PhantomData;
-
-use ser::{
-    self,
-    Serialize,
-    SerializeSeq,
-    SerializeTuple,
-    SerializeTupleStruct,
-    SerializeTupleVariant,
-    SerializeMap,
-    SerializeStruct,
-    SerializeStructVariant,
-};
-
-/// 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`.
-///
-/// ```rust,ignore
-/// 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.
-///         Err(...)
-///     }
-///
-///     /* other Serializer methods */
-/// }
-/// ```
-pub struct Impossible<Ok, E> {
-    void: Void,
-    _marker: PhantomData<(Ok, E)>,
-}
-
-enum Void {}
-
-impl<Ok, E> SerializeSeq for Impossible<Ok, E>
-    where E: ser::Error,
-{
-    type Ok = Ok;
-    type Error = E;
-
-    fn serialize_element<T: ?Sized + Serialize>(&mut self,
-                                                _value: &T)
-                                                -> Result<(), E> {
-        match self.void {}
-    }
-
-    fn end(self) -> Result<Ok, E> {
-        match self.void {}
-    }
-}
-
-impl<Ok, E> SerializeTuple for Impossible<Ok, E>
-    where E: ser::Error,
-{
-    type Ok = Ok;
-    type Error = E;
-
-    fn serialize_element<T: ?Sized + Serialize>(&mut self,
-                                                _value: &T)
-                                                -> Result<(), E> {
-        match self.void {}
-    }
-
-    fn end(self) -> Result<Ok, E> {
-        match self.void {}
-    }
-}
-
-impl<Ok, E> SerializeTupleStruct for Impossible<Ok, E>
-    where E: ser::Error,
-{
-    type Ok = Ok;
-    type Error = E;
-
-    fn serialize_field<T: ?Sized + Serialize>(&mut self,
-                                              _value: &T)
-                                              -> Result<(), E> {
-        match self.void {}
-    }
-
-    fn end(self) -> Result<Ok, E> {
-        match self.void {}
-    }
-}
-
-impl<Ok, E> SerializeTupleVariant for Impossible<Ok, E>
-    where E: ser::Error,
-{
-    type Ok = Ok;
-    type Error = E;
-
-    fn serialize_field<T: ?Sized + Serialize>(&mut self,
-                                              _value: &T)
-                                              -> Result<(), E> {
-        match self.void {}
-    }
-
-    fn end(self) -> Result<Ok, E> {
-        match self.void {}
-    }
-}
-
-impl<Ok, E> SerializeMap for Impossible<Ok, E>
-    where E: ser::Error,
-{
-    type Ok = Ok;
-    type Error = E;
-
-    fn serialize_key<T: ?Sized + Serialize>(&mut self,
-                                                 _key: &T)
-                                            -> Result<(), E> {
-        match self.void {}
-    }
-
-    fn serialize_value<T: ?Sized + Serialize>(&mut self,
-                                              _value: &T)
-                                              -> Result<(), E> {
-        match self.void {}
-    }
-
-    fn end(self) -> Result<Ok, E> {
-        match self.void {}
-    }
-}
-
-impl<Ok, E> SerializeStruct for Impossible<Ok, E>
-    where E: ser::Error,
-{
-    type Ok = Ok;
-    type Error = E;
-
-    fn serialize_field<T: ?Sized + Serialize>(&mut self,
-                                                   _key: &'static str,
-                                              _value: &T)
-                                              -> Result<(), E> {
-        match self.void {}
-    }
-
-    fn end(self) -> Result<Ok, E> {
-        match self.void {}
-    }
-}
-
-impl<Ok, E> SerializeStructVariant for Impossible<Ok, E>
-    where E: ser::Error,
-{
-    type Ok = Ok;
-    type Error = E;
-
-    fn serialize_field<T: ?Sized + Serialize>(&mut self,
-                                                   _key: &'static str,
-                                              _value: &T)
-                                              -> Result<(), E> {
-        match self.void {}
-    }
-
-    fn end(self) -> Result<Ok, E> {
-        match self.void {}
-    }
-}

serde/src/ser/private.rs

@@ -1,235 +0,0 @@
-use core::fmt::{self, Display};
-
-use ser::{self, Serialize, Serializer, SerializeMap, SerializeStruct};
-
-/// Not public API.
-pub fn serialize_tagged_newtype<S, T>(
-    serializer: S,
-    type_ident: &'static str,
-    variant_ident: &'static str,
-    tag: &'static str,
-    variant_name: &'static str,
-    value: T,
-) -> Result<S::Ok, S::Error>
-    where S: Serializer,
-          T: Serialize
-{
-    value.serialize(TaggedSerializer {
-        type_ident: type_ident,
-        variant_ident: variant_ident,
-        tag: tag,
-        variant_name: variant_name,
-        delegate: serializer,
-    })
-}
-
-struct TaggedSerializer<S> {
-    type_ident: &'static str,
-    variant_ident: &'static str,
-    tag: &'static str,
-    variant_name: &'static str,
-    delegate: S,
-}
-
-enum Unsupported {
-    Boolean,
-    Integer,
-    Float,
-    Char,
-    String,
-    ByteArray,
-    Optional,
-    Unit,
-    UnitStruct,
-    Sequence,
-    Tuple,
-    TupleStruct,
-    Enum,
-}
-
-impl Display for Unsupported {
-    fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
-        match *self {
-            Unsupported::Boolean => formatter.write_str("a boolean"),
-            Unsupported::Integer => formatter.write_str("an integer"),
-            Unsupported::Float => formatter.write_str("a float"),
-            Unsupported::Char => formatter.write_str("a char"),
-            Unsupported::String => formatter.write_str("a string"),
-            Unsupported::ByteArray => formatter.write_str("a byte array"),
-            Unsupported::Optional => formatter.write_str("an optional"),
-            Unsupported::Unit => formatter.write_str("unit"),
-            Unsupported::UnitStruct => formatter.write_str("a unit struct"),
-            Unsupported::Sequence => formatter.write_str("a sequence"),
-            Unsupported::Tuple => formatter.write_str("a tuple"),
-            Unsupported::TupleStruct => formatter.write_str("a tuple struct"),
-            Unsupported::Enum => formatter.write_str("an enum"),
-        }
-    }
-}
-
-struct Error {
-    type_ident: &'static str,
-    variant_ident: &'static str,
-    ty: Unsupported,
-}
-
-impl Display for Error {
-    fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
-        write!(formatter,
-               "cannot serialize tagged newtype variant {}::{} containing {}",
-               self.type_ident, self.variant_ident, self.ty)
-    }
-}
-
-impl<S> TaggedSerializer<S>
-    where S: Serializer
-{
-    fn bad_type(self, what: Unsupported) -> S::Error {
-        ser::Error::custom(Error {
-            type_ident: self.type_ident,
-            variant_ident: self.variant_ident,
-            ty: what,
-        })
-    }
-}
-
-impl<S> Serializer for TaggedSerializer<S>
-    where S: Serializer
-{
-    type Ok = S::Ok;
-    type Error = S::Error;
-
-    type SerializeSeq = S::SerializeSeq;
-    type SerializeTuple = S::SerializeTuple;
-    type SerializeTupleStruct = S::SerializeTupleStruct;
-    type SerializeTupleVariant = S::SerializeTupleVariant;
-    type SerializeMap = S::SerializeMap;
-    type SerializeStruct = S::SerializeStruct;
-    type SerializeStructVariant = S::SerializeStructVariant;
-
-    fn serialize_bool(self, _: bool) -> Result<Self::Ok, Self::Error> {
-        Err(self.bad_type(Unsupported::Boolean))
-    }
-
-    fn serialize_i8(self, _: i8) -> Result<Self::Ok, Self::Error> {
-        Err(self.bad_type(Unsupported::Integer))
-    }
-
-    fn serialize_i16(self, _: i16) -> Result<Self::Ok, Self::Error> {
-        Err(self.bad_type(Unsupported::Integer))
-    }
-
-    fn serialize_i32(self, _: i32) -> Result<Self::Ok, Self::Error> {
-        Err(self.bad_type(Unsupported::Integer))
-    }
-
-    fn serialize_i64(self, _: i64) -> Result<Self::Ok, Self::Error> {
-        Err(self.bad_type(Unsupported::Integer))
-    }
-
-    fn serialize_u8(self, _: u8) -> Result<Self::Ok, Self::Error> {
-        Err(self.bad_type(Unsupported::Integer))
-    }
-
-    fn serialize_u16(self, _: u16) -> Result<Self::Ok, Self::Error> {
-        Err(self.bad_type(Unsupported::Integer))
-    }
-
-    fn serialize_u32(self, _: u32) -> Result<Self::Ok, Self::Error> {
-        Err(self.bad_type(Unsupported::Integer))
-    }
-
-    fn serialize_u64(self, _: u64) -> Result<Self::Ok, Self::Error> {
-        Err(self.bad_type(Unsupported::Integer))
-    }
-
-    fn serialize_f32(self, _: f32) -> Result<Self::Ok, Self::Error> {
-        Err(self.bad_type(Unsupported::Float))
-    }
-
-    fn serialize_f64(self, _: f64) -> Result<Self::Ok, Self::Error> {
-        Err(self.bad_type(Unsupported::Float))
-    }
-
-    fn serialize_char(self, _: char) -> Result<Self::Ok, Self::Error> {
-        Err(self.bad_type(Unsupported::Char))
-    }
-
-    fn serialize_str(self, _: &str) -> Result<Self::Ok, Self::Error> {
-        Err(self.bad_type(Unsupported::String))
-    }
-
-    fn serialize_bytes(self, _: &[u8]) -> Result<Self::Ok, Self::Error> {
-        Err(self.bad_type(Unsupported::ByteArray))
-    }
-
-    fn serialize_none(self) -> Result<Self::Ok, Self::Error> {
-        Err(self.bad_type(Unsupported::Optional))
-    }
-
-    fn serialize_some<T: ?Sized>(self, _: &T) -> Result<Self::Ok, Self::Error>
-        where T: Serialize
-    {
-        Err(self.bad_type(Unsupported::Optional))
-    }
-
-    fn serialize_unit(self) -> Result<Self::Ok, Self::Error> {
-        Err(self.bad_type(Unsupported::Unit))
-    }
-
-    fn serialize_unit_struct(self, _: &'static str) -> Result<Self::Ok, Self::Error> {
-        Err(self.bad_type(Unsupported::UnitStruct))
-    }
-
-    fn serialize_unit_variant(self, _: &'static str, _: usize, _: &'static str) -> Result<Self::Ok, Self::Error> {
-        Err(self.bad_type(Unsupported::Enum))
-    }
-
-    fn serialize_newtype_struct<T: ?Sized>(self, _: &'static str, value: &T) -> Result<Self::Ok, Self::Error>
-        where T: Serialize
-    {
-        value.serialize(self)
-    }
-
-    fn serialize_newtype_variant<T: ?Sized>(self, _: &'static str, _: usize, _: &'static str, _: &T) -> Result<Self::Ok, Self::Error>
-        where T: Serialize
-    {
-        Err(self.bad_type(Unsupported::Enum))
-    }
-
-    fn serialize_seq(self, _: Option<usize>) -> Result<Self::SerializeSeq, Self::Error> {
-        Err(self.bad_type(Unsupported::Sequence))
-    }
-
-    fn serialize_seq_fixed_size(self, _: usize) -> Result<Self::SerializeSeq, Self::Error> {
-        Err(self.bad_type(Unsupported::Sequence))
-    }
-
-    fn serialize_tuple(self, _: usize) -> Result<Self::SerializeTuple, Self::Error> {
-        Err(self.bad_type(Unsupported::Tuple))
-    }
-
-    fn serialize_tuple_struct(self, _: &'static str, _: usize) -> Result<Self::SerializeTupleStruct, Self::Error> {
-        Err(self.bad_type(Unsupported::TupleStruct))
-    }
-
-    fn serialize_tuple_variant(self, _: &'static str, _: usize, _: &'static str, _: usize) -> Result<Self::SerializeTupleVariant, Self::Error> {
-        Err(self.bad_type(Unsupported::Enum))
-    }
-
-    fn serialize_map(self, len: Option<usize>) -> Result<Self::SerializeMap, Self::Error> {
-        let mut map = try!(self.delegate.serialize_map(len.map(|len| len + 1)));
-        try!(map.serialize_entry(self.tag, self.variant_name));
-        Ok(map)
-    }
-
-    fn serialize_struct(self, name: &'static str, len: usize) -> Result<Self::SerializeStruct, Self::Error> {
-        let mut state = try!(self.delegate.serialize_struct(name, len + 1));
-        try!(state.serialize_field(self.tag, self.variant_name));
-        Ok(state)
-    }
-
-    fn serialize_struct_variant(self, _: &'static str, _: usize, _: &'static str, _: usize) -> Result<Self::SerializeStructVariant, Self::Error> {
-        Err(self.bad_type(Unsupported::Enum))
-    }
-}

serde/src/utils.rs

@@ -1,72 +0,0 @@
-//! Private utility functions
-
-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_utf8(c: char) -> EncodeUtf8 {
-    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
-    };
-    EncodeUtf8 { buf: buf, pos: pos }
-}
-
-pub struct EncodeUtf8 {
-    buf: [u8; 4],
-    pos: usize,
-}
-
-impl EncodeUtf8 {
-    // FIXME: use this from_utf8_unchecked, since we know it can never fail
-    pub fn as_str(&self) -> &str {
-        ::core::str::from_utf8(&self.buf[self.pos..]).unwrap()
-    }
-}
-
-#[allow(non_upper_case_globals)]
-const Pattern_White_Space_table: &'static [(char, char)] = &[
-    ('\u{9}', '\u{d}'), ('\u{20}', '\u{20}'), ('\u{85}', '\u{85}'), ('\u{200e}', '\u{200f}'),
-    ('\u{2028}', '\u{2029}')
-];
-
-fn bsearch_range_table(c: char, r: &'static [(char, char)]) -> bool {
-    use core::cmp::Ordering::{Equal, Less, Greater};
-    r.binary_search_by(|&(lo, hi)| {
-        if c < lo {
-            Greater
-        } else if hi < c {
-            Less
-        } else {
-            Equal
-        }
-    })
-    .is_ok()
-}
-
-#[allow(non_snake_case)]
-pub fn Pattern_White_Space(c: char) -> bool {
-    bsearch_range_table(c, Pattern_White_Space_table)
-}

serde_codegen/Cargo.toml

@@ -0,0 +1,24 @@
+[package]
+name = "serde_codegen"
+version = "0.4.2"
+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"
+build = "build.rs"
+
+[features]
+default = ["with-syntex"]
+nightly = ["quasi_macros"]
+with-syntex = ["quasi/with-syntex", "quasi_codegen/with-syntex", "syntex", "syntex_syntax"]
+
+[build-dependencies]
+quasi_codegen = { verision = "*", optional = true }
+syntex = { version = "*", optional = true }
+
+[dependencies]
+aster = { version = "*", default-features = false }
+quasi = { verision = "*", default-features = false }
+quasi_macros = { version = "*", optional = true }
+syntex = { version = "*", optional = true }
+syntex_syntax = { version = "*", optional = true }

serde_codegen/build.rs

@@ -0,0 +1,28 @@
+#[cfg(feature = "with-syntex")]
+mod inner {
+    extern crate syntex;
+    extern crate quasi_codegen;
+
+    use std::env;
+    use std::path::Path;
+
+    pub fn main() {
+        let out_dir = env::var_os("OUT_DIR").unwrap();
+        let mut registry = syntex::Registry::new();
+        quasi_codegen::register(&mut registry);
+
+        let src = Path::new("src/lib.rs.in");
+        let dst = Path::new(&out_dir).join("lib.rs");
+
+        registry.expand("", &src, &dst).unwrap();
+    }
+}
+
+#[cfg(not(feature = "with-syntex"))]
+mod inner {
+    pub fn main() {}
+}
+
+fn main() {
+    inner::main();
+}

serde_codegen/src/attr.rs

@@ -0,0 +1,108 @@
+use std::collections::HashMap;
+use std::collections::HashSet;
+
+use syntax::ast;
+use syntax::ext::base::ExtCtxt;
+use syntax::ptr::P;
+
+/// Represents field name information
+pub enum FieldNames {
+    Global(P<ast::Expr>),
+    Format{
+        formats: HashMap<P<ast::Expr>, P<ast::Expr>>,
+        default: P<ast::Expr>,
+    }
+}
+
+/// Represents field attribute information
+pub struct FieldAttrs {
+    names: FieldNames,
+    use_default: bool,
+}
+
+impl FieldAttrs {
+
+    /// Create a FieldAttr with a single default field name
+    pub fn new(default_value: bool, name: P<ast::Expr>) -> FieldAttrs {
+        FieldAttrs {
+            names: FieldNames::Global(name),
+            use_default: default_value,
+        }
+    }
+
+    /// Create a FieldAttr with format specific field names
+    pub fn new_with_formats(
+        default_value: bool,
+        default_name: P<ast::Expr>,
+        formats: HashMap<P<ast::Expr>, P<ast::Expr>>,
+        ) -> FieldAttrs {
+        FieldAttrs {
+            names:  FieldNames::Format {
+                formats: formats,
+                default: default_name,
+            },
+            use_default: default_value,
+        }
+    }
+
+    /// Return a set of formats that the field has attributes for.
+    pub fn formats(&self) -> HashSet<P<ast::Expr>> {
+        match self.names {
+            FieldNames::Format{ref formats, default: _} => {
+                let mut set = HashSet::new();
+                for (fmt, _) in formats.iter() {
+                    set.insert(fmt.clone());
+                };
+                set
+            },
+            _ => HashSet::new()
+        }
+    }
+
+    /// Return an expression for the field key name for serialisation.
+    ///
+    /// The resulting expression assumes that `S` refers to a type
+    /// that implements `Serializer`.
+    pub fn serializer_key_expr(self, cx: &ExtCtxt) -> P<ast::Expr> {
+        match self.names {
+            FieldNames::Global(x) => x,
+            FieldNames::Format{formats, default} => {
+                let arms = formats.iter()
+                    .map(|(fmt, lit)| {
+                        quote_arm!(cx, $fmt => { $lit })
+                    })
+                    .collect::<Vec<_>>();
+                quote_expr!(cx,
+                            {
+                                match S::format() {
+                                    $arms
+                                    _ => { $default }
+                                }
+                            })
+            },
+        }
+    }
+
+    /// Return the default field name for the field.
+    pub fn default_key_expr(&self) -> &P<ast::Expr> {
+        match self.names {
+            FieldNames::Global(ref expr) => expr,
+            FieldNames::Format{formats: _, ref default} => default
+        }
+    }
+
+    /// Return the field name for the field in the specified format.
+    pub fn key_expr(&self, format: &P<ast::Expr>) -> &P<ast::Expr> {
+        match self.names {
+            FieldNames::Global(ref expr) =>
+                expr,
+            FieldNames::Format{ref formats, ref default} =>
+                formats.get(format).unwrap_or(default)
+        }
+    }
+
+    /// Predicate for using a field's default value
+    pub fn use_default(&self) -> bool {
+        self.use_default
+    }
+}

serde_codegen/src/de.rs

@@ -0,0 +1,833 @@
+use std::collections::HashSet;
+
+use aster;
+
+use syntax::ast::{
+    self,
+    Ident,
+    MetaItem,
+    Item,
+    Expr,
+    StructDef,
+    EnumDef,
+};
+use syntax::codemap::Span;
+use syntax::ext::base::{Annotatable, ExtCtxt};
+use syntax::ext::build::AstBuilder;
+use syntax::owned_slice::OwnedSlice;
+use syntax::ptr::P;
+
+use attr;
+use field;
+
+pub fn expand_derive_deserialize(
+    cx: &mut ExtCtxt,
+    span: Span,
+    meta_item: &MetaItem,
+    annotatable: &Annotatable,
+    push: &mut FnMut(Annotatable)
+) {
+    let item = match *annotatable {
+        Annotatable::Item(ref item) => item,
+        _ => {
+            cx.span_err(
+                meta_item.span,
+                "`derive` may only be applied to structs and enums");
+            return;
+        }
+    };
+
+    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(Annotatable::Item(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,
+    forward_ty_params: Vec<ast::TyParam>,
+    forward_tys: Vec<P<ast::Ty>>
+) -> (P<ast::Item>, P<ast::Ty>, P<ast::Expr>, ast::Generics) {
+    if trait_generics.ty_params.is_empty() && forward_tys.is_empty() {
+        (
+            builder.item().tuple_struct("__Visitor").build(),
+            builder.ty().id("__Visitor"),
+            builder.expr().id("__Visitor"),
+            trait_generics.clone(),
+        )
+    } else {
+        let placeholders : Vec<_> = trait_generics.ty_params.iter()
+            .map(|t| builder.ty().id(t.ident))
+            .collect();
+        let mut trait_generics = trait_generics.clone();
+        let mut ty_params = forward_ty_params.clone();
+        ty_params.extend(trait_generics.ty_params.into_vec());
+        trait_generics.ty_params = OwnedSlice::from_vec(ty_params);
+
+        (
+            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()
+                .path().segment("__Visitor")
+                .with_tys(forward_tys)
+                .with_tys(placeholders)
+                .build().build()
+                .with_args(
+                    trait_generics.ty_params.iter().map(|_| {
+                        builder.expr().phantom_data()
+                    })
+                )
+                .build(),
+            trait_generics,
+        )
+    }
+}
+
+fn deserializer_ty_param(builder: &aster::AstBuilder) -> ast::TyParam {
+    builder.ty_param("__D")
+        .trait_bound(builder.path()
+                     .global()
+                     .segment("serde").build()
+                     .segment("de").build()
+                     .id("Deserializer")
+                     .build())
+        .build()
+        .build()
+}
+
+fn deserializer_ty_arg(builder: &aster::AstBuilder) -> P<ast::Ty>{
+    builder.ty().id("__D")
+}
+
+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, visitor_generics) =
+        deserialize_visitor(
+            builder,
+            impl_generics,
+            vec![deserializer_ty_param(builder)],
+            vec![deserializer_ty_arg(builder)],
+        );
+
+    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 $visitor_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, visitor_generics) =
+        deserialize_visitor(
+            builder,
+            &impl_generics,
+            vec![deserializer_ty_param(builder)],
+            vec![deserializer_ty_arg(builder)],
+                );
+
+    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 $visitor_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|
+                 attr::FieldAttrs::new(
+                     true,
+                     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, visitor_generics) =
+        deserialize_visitor(
+            builder,
+            impl_generics,
+            vec![deserializer_ty_param(builder)],
+            vec![deserializer_ty_arg(builder)],
+                );
+
+    quote_expr!(cx, {
+        $variant_visitor
+
+        $visitor_item
+
+        impl $visitor_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, visitor_generics) =
+        deserialize_visitor(
+            builder,
+            generics,
+            vec![deserializer_ty_param(builder)],
+            vec![deserializer_ty_arg(builder)],
+                );
+
+    let visit_seq_expr = deserialize_seq(
+        cx,
+        builder,
+        builder.path().id(type_ident).id(variant_ident).build(),
+        fields,
+    );
+
+    quote_expr!(cx, {
+        $visitor_item
+
+        impl $visitor_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, visitor_generics) =
+        deserialize_visitor(
+            builder,
+            generics,
+            vec![deserializer_ty_param(builder)],
+            vec![deserializer_ty_arg(builder)],
+                );
+
+    quote_expr!(cx, {
+        $field_visitor
+
+        $visitor_item
+
+        impl $visitor_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_attrs: Vec<attr::FieldAttrs>,
+) -> Vec<P<ast::Item>> {
+    // Create the field names for the fields.
+    let field_idents: Vec<ast::Ident> = (0 .. field_attrs.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();
+
+    // A set of all the formats that have specialized field attributes
+    let formats = field_attrs.iter()
+        .fold(HashSet::new(), |mut set, field_expr| {
+            set.extend(field_expr.formats());
+            set
+        });
+
+    // Match arms to extract a field from a string
+    let default_field_arms: Vec<_> = field_idents.iter()
+        .zip(field_attrs.iter())
+        .map(|(field_ident, field_expr)| {
+            let expr = field_expr.default_key_expr();
+            quote_arm!(cx, $expr => { Ok(__Field::$field_ident) })
+        })
+        .collect();
+
+    let body = if formats.is_empty() {
+        // No formats specific attributes, so no match on format required
+        quote_expr!(cx,
+                    match value {
+                        $default_field_arms
+                        _ => { Err(::serde::de::Error::unknown_field_error(value)) }
+                    })
+    } else {
+        let field_arms : Vec<_> = formats.iter()
+            .map(|fmt| {
+                field_idents.iter()
+                    .zip(field_attrs.iter())
+                    .map(|(field_ident, field_expr)| {
+                        let expr = field_expr.key_expr(fmt);
+                        quote_arm!(cx, $expr => { Ok(__Field::$field_ident) })
+                    })
+                    .collect::<Vec<_>>()
+            })
+            .collect();
+
+        let fmt_matches : Vec<_> = formats.iter()
+            .zip(field_arms.iter())
+            .map(|(ref fmt, ref arms)| {
+                quote_arm!(cx, $fmt => {
+                    match value {
+                        $arms
+                        _ => {
+                            Err(::serde::de::Error::unknown_field_error(value))
+                        }
+                    }})
+            })
+            .collect();
+
+        quote_expr!(cx,
+                    match __D::format() {
+                        $fmt_matches
+                        _ => match value {
+                            $default_field_arms
+                            _ => { Err(::serde::de::Error::unknown_field_error(value)) }
+                        }
+                    })
+    };
+
+    let impl_item = 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,
+            {
+                use std::marker::PhantomData;
+
+                struct __FieldVisitor<D> {
+                    phantom: PhantomData<D>
+                }
+
+                impl<__D> ::serde::de::Visitor for __FieldVisitor<__D>
+                    where __D: ::serde::de::Deserializer
+                {
+                    type Value = __Field;
+
+                    fn visit_str<E>(&mut self, value: &str) -> ::std::result::Result<__Field, E>
+                        where E: ::serde::de::Error,
+                    {
+                        $body
+                    }
+
+                    fn visit_bytes<E>(&mut self, value: &[u8]) -> ::std::result::Result<__Field, E>
+                        where E: ::serde::de::Error,
+                    {
+                        // TODO: would be better to generate a byte string literal match
+                        match ::std::str::from_utf8(value) {
+                            Ok(s) => self.visit_str(s),
+                            _ => Err(::serde::de::Error::syntax_error()),
+                        }
+                    }
+                }
+
+                deserializer.visit(
+                    __FieldVisitor::<D>{ phantom: PhantomData })
+            }
+        }
+    ).unwrap();
+
+    vec![field_enum, impl_item]
+}
+
+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_attrs(cx, builder, struct_def),
+    );
+
+    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(field::struct_field_attrs(cx, builder, struct_def).iter())
+        .map(|(field_name, field_attr)| {
+            let missing_expr = if field_attr.use_default() {
+                quote_expr!(cx, ::std::default::Default::default())
+            } else {
+                let formats = field_attr.formats();
+                let arms : Vec<_> = formats.iter()
+                    .map(|format| {
+                        let key_expr = field_attr.key_expr(format);
+                        quote_arm!(cx, $format => { $key_expr })
+                    })
+                    .collect();
+                let default = field_attr.default_key_expr();
+                if arms.is_empty() {
+                    quote_expr!(cx, try!(visitor.missing_field($default)))
+                } else {
+                    quote_expr!(
+                        cx,
+                        try!(visitor.missing_field(
+                            match __D::format() {
+                                $arms
+                                _ => { $default }
+                            })))
+                }
+            };
+
+            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_codegen/src/field.rs

@@ -0,0 +1,133 @@
+use std::collections::HashMap;
+
+use aster;
+
+use syntax::ast;
+use syntax::attr;
+use syntax::ext::base::ExtCtxt;
+use syntax::ptr::P;
+
+use attr::FieldAttrs;
+
+enum Rename<'a> {
+    None,
+    Global(&'a ast::Lit),
+    Format(HashMap<P<ast::Expr>, &'a ast::Lit>)
+}
+
+fn rename<'a>(
+    builder: &aster::AstBuilder,
+    mi: &'a ast::MetaItem,
+    ) -> Option<Rename<'a>>
+{
+    match mi.node {
+        ast::MetaNameValue(ref n, ref lit) => {
+            if n == &"rename" {
+                Some(Rename::Global(lit))
+            } else {
+                None
+            }
+        },
+        ast::MetaList(ref n, ref items) => {
+            if n == &"rename" {
+                let mut m = HashMap::new();
+                m.extend(
+                    items.iter()
+                        .filter_map(
+                            |item|
+                            match item.node {
+                                ast::MetaNameValue(ref n, ref lit) =>
+                                    Some((builder.expr().str(n),
+                                          lit)),
+                                _ => None
+                            }));
+                Some(Rename::Format(m))
+            } else {
+                None
+            }
+        },
+        _ => None
+    }
+}
+
+fn default_value(mi: &ast::MetaItem) -> bool {
+    if let ast::MetaItem_::MetaWord(ref n) = mi.node {
+        n == &"default"
+    } else {
+        false
+    }
+}
+
+fn field_attrs<'a>(
+    builder: &aster::AstBuilder,
+    field: &'a ast::StructField,
+) -> (Rename<'a>, bool) {
+    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);
+                Some((vals.iter()
+                      .fold(None, |v, mi| v.or(rename(builder, mi)))
+                      .unwrap_or(Rename::None),
+                      vals.iter().any(|mi| default_value(mi))))
+            } else {
+                Some((Rename::None, false))
+            }
+        })
+        .unwrap_or((Rename::None, false))
+}
+
+pub fn struct_field_attrs(
+    cx: &ExtCtxt,
+    builder: &aster::AstBuilder,
+    struct_def: &ast::StructDef,
+) -> Vec<FieldAttrs> {
+    struct_def.fields.iter()
+        .map(|field| {
+            match field_attrs(builder, field) {
+                (Rename::Global(rename), default_value) =>
+                    FieldAttrs::new(
+                        default_value,
+                        builder.expr().build_lit(P(rename.clone()))),
+                (Rename::Format(renames), default_value) => {
+                    let mut res = HashMap::new();
+                    res.extend(
+                        renames.into_iter()
+                            .map(|(k,v)|
+                                 (k, builder.expr().build_lit(P(v.clone())))));
+                    FieldAttrs::new_with_formats(
+                        default_value,
+                        default_field_name(cx, builder, field.node.kind),
+                        res)
+                },
+                (Rename::None, default_value) => {
+                    FieldAttrs::new(
+                        default_value,
+                        default_field_name(cx, builder, field.node.kind))
+                }
+            }
+        })
+        .collect()
+}
+
+fn default_field_name(
+    cx: &ExtCtxt,
+    builder: &aster::AstBuilder,
+    kind: ast::StructFieldKind,
+) -> P<ast::Expr> {
+    match kind {
+        ast::NamedField(name, _) => {
+            builder.expr().str(name)
+        }
+        ast::UnnamedField(_) => {
+            cx.bug("struct has named and unnamed fields")
+        }
+    }
+}

serde_codegen/src/lib.rs

@@ -0,0 +1,73 @@
+#![cfg_attr(not(feature = "with-syntex"), feature(rustc_private, plugin))]
+#![cfg_attr(not(feature = "with-syntex"), plugin(quasi_macros))]
+
+extern crate aster;
+extern crate quasi;
+
+#[cfg(feature = "with-syntex")]
+extern crate syntex;
+
+#[cfg(feature = "with-syntex")]
+extern crate syntex_syntax as syntax;
+
+#[cfg(not(feature = "with-syntex"))]
+extern crate syntax;
+
+#[cfg(not(feature = "with-syntex"))]
+extern crate rustc;
+
+#[cfg(feature = "with-syntex")]
+include!(concat!(env!("OUT_DIR"), "/lib.rs"));
+
+#[cfg(not(feature = "with-syntex"))]
+include!("lib.rs.in");
+
+#[cfg(feature = "with-syntex")]
+pub fn register(reg: &mut syntex::Registry) {
+    use syntax::{ast, fold};
+
+    reg.add_attr("feature(custom_derive)");
+    reg.add_attr("feature(custom_attribute)");
+
+    reg.add_decorator("derive_Serialize", ser::expand_derive_serialize);
+    reg.add_decorator("derive_Deserialize", de::expand_derive_deserialize);
+
+    reg.add_post_expansion_pass(strip_attributes);
+
+    /// Strip the serde attributes from the crate.
+    #[cfg(feature = "with-syntex")]
+    fn strip_attributes(krate: ast::Crate) -> ast::Crate {
+        /// Helper folder that strips the serde attributes after the extensions have been expanded.
+        struct StripAttributeFolder;
+
+        impl fold::Folder for StripAttributeFolder {
+            fn fold_attribute(&mut self, attr: ast::Attribute) -> Option<ast::Attribute> {
+                match attr.node.value.node {
+                    ast::MetaList(ref n, _) if n == &"serde" => { return None; }
+                    _ => {}
+                }
+
+                Some(attr)
+            }
+
+            fn fold_mac(&mut self, mac: ast::Mac) -> ast::Mac {
+                fold::noop_fold_mac(mac, self)
+            }
+        }
+
+        fold::Folder::fold_crate(&mut StripAttributeFolder, krate)
+    }
+}
+
+#[cfg(not(feature = "with-syntex"))]
+pub fn register(reg: &mut rustc::plugin::Registry) {
+    reg.register_syntax_extension(
+        syntax::parse::token::intern("derive_Serialize"),
+        syntax::ext::base::MultiDecorator(
+            Box::new(ser::expand_derive_serialize)));
+
+    reg.register_syntax_extension(
+        syntax::parse::token::intern("derive_Deserialize"),
+        syntax::ext::base::MultiDecorator(
+            Box::new(de::expand_derive_deserialize)));
+}

serde_codegen/src/lib.rs.in

@@ -0,0 +1,4 @@
+mod attr;
+mod de;
+mod field;
+mod ser;

serde_codegen/src/ser.rs

@@ -0,0 +1,623 @@
+use aster;
+
+use syntax::ast::{
+    Ident,
+    MetaItem,
+    Item,
+    Expr,
+    StructDef,
+};
+use syntax::ast;
+use syntax::codemap::Span;
+use syntax::ext::base::{Annotatable, ExtCtxt};
+use syntax::ext::build::AstBuilder;
+use syntax::ptr::P;
+
+use field::struct_field_attrs;
+
+pub fn expand_derive_serialize(
+    cx: &mut ExtCtxt,
+    span: Span,
+    meta_item: &MetaItem,
+    annotatable: &Annotatable,
+    push: &mut FnMut(Annotatable)
+) {
+    let item = match *annotatable {
+        Annotatable::Item(ref item) => item,
+        _ => {
+            cx.span_err(
+                meta_item.span,
+                "`derive` may only be applied to structs and enums");
+            return;
+        }
+    };
+
+    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,
+        builder.ty()
+            .ref_()
+            .lifetime("'__a")
+            .build_ty(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(Annotatable::Item(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,
+                ty,
+                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 (visitor_struct, visitor_impl) = serialize_tuple_struct_visitor(
+        cx,
+        builder,
+        ty.clone(),
+        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,
+            _structure_ty: ::std::marker::PhantomData,
+        })
+    })
+}
+
+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 (visitor_struct, visitor_impl) = serialize_struct_visitor(
+        cx,
+        builder,
+        ty.clone(),
+        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,
+            _structure_ty: ::std::marker::PhantomData,
+        })
+    })
+}
+
+fn serialize_item_enum(
+    cx: &ExtCtxt,
+    builder: &aster::AstBuilder,
+    type_ident: Ident,
+    impl_generics: &ast::Generics,
+    ty: P<ast::Ty>,
+    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,
+                ty.clone(),
+                variant,
+            )
+        })
+        .collect();
+
+    quote_expr!(cx,
+        match *self {
+            $arms
+        }
+    )
+}
+
+fn serialize_variant(
+    cx: &ExtCtxt,
+    builder: &aster::AstBuilder,
+    type_ident: Ident,
+    generics: &ast::Generics,
+    ty: P<ast::Ty>,
+    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,
+                ty,
+                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,
+                ty,
+                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,
+    structure_ty: P<ast::Ty>,
+    args: &[ast::VariantArg],
+    fields: Vec<Ident>,
+) -> P<ast::Expr> {
+    let variant_ty = builder.ty().tuple()
+        .with_tys(
+            args.iter().map(|arg| {
+                builder.ty()
+                    .ref_()
+                    .lifetime("'__a")
+                    .build_ty(arg.ty.clone())
+            })
+        )
+        .build();
+
+    let (visitor_struct, visitor_impl) = serialize_tuple_struct_visitor(
+        cx,
+        builder,
+        structure_ty,
+        variant_ty,
+        args.len(),
+        generics,
+    );
+
+    let value_expr = builder.expr().tuple()
+        .with_exprs(
+            fields.iter().map(|field| {
+                builder.expr()
+                    .addr_of()
+                    .id(field)
+            })
+        )
+        .build();
+
+    quote_expr!(cx, {
+        $visitor_struct
+        $visitor_impl
+        serializer.visit_enum_seq($type_name, $variant_name, Visitor {
+            value: $value_expr,
+            state: 0,
+            _structure_ty: ::std::marker::PhantomData,
+        })
+    })
+}
+
+fn serialize_struct_variant(
+    cx: &ExtCtxt,
+    builder: &aster::AstBuilder,
+    type_name: P<ast::Expr>,
+    variant_name: P<ast::Expr>,
+    generics: &ast::Generics,
+    structure_ty: P<ast::Ty>,
+    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,
+        structure_ty,
+        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,
+            _structure_ty: ::std::marker::PhantomData,
+        })
+    })
+}
+
+fn serialize_tuple_struct_visitor(
+    cx: &ExtCtxt,
+    builder: &aster::AstBuilder,
+    structure_ty: P<ast::Ty>,
+    variant_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();
+
+    // Variants don't necessarily reference all generic lifetimes and type parameters,
+    // so to avoid a compilation failure, we'll just add a phantom type to capture these
+    // unused values.
+    let structure_ty = builder.ty()
+        .phantom_data()
+        .build(structure_ty);
+
+    (
+        quote_item!(cx,
+            struct Visitor $visitor_impl_generics $where_clause {
+                state: usize,
+                value: $variant_ty,
+                _structure_ty: $structure_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,
+    structure_ty: P<ast::Ty>,
+    variant_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 field_attrs = struct_field_attrs(cx, builder, struct_def);
+
+    let arms: Vec<ast::Arm> = field_attrs.into_iter()
+        .zip(value_exprs)
+        .enumerate()
+        .map(|(i, (field, value_expr))| {
+            let key_expr = field.serializer_key_expr(cx);
+            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();
+
+    // Variants don't necessarily reference all generic lifetimes and type parameters,
+    // so to avoid a compilation failure, we'll just add a phantom type to capture these
+    // unused values.
+    let structure_ty = builder.ty()
+        .phantom_data()
+        .build(structure_ty);
+
+    (
+        quote_item!(cx,
+            struct Visitor $visitor_impl_generics $where_clause {
+                state: usize,
+                value: $variant_ty,
+                _structure_ty: $structure_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_codegen_internals/Cargo.toml

@@ -1,17 +0,0 @@
-[package]
-name = "serde_codegen_internals"
-version = "0.13.0"
-authors = ["Erick Tryzelaar <erick.tryzelaar@gmail.com>"]
-license = "MIT/Apache-2.0"
-description = "AST representation used by Serde codegen. Unstable."
-homepage = "https://serde.rs"
-repository = "https://github.com/serde-rs/serde"
-documentation = "https://docs.serde.rs/serde_codegen_internals/"
-keywords = ["serde", "serialization"]
-include = ["Cargo.toml", "src/**/*.rs"]
-
-[dependencies]
-syn = "0.11"
-
-[badges]
-travis-ci = { repository = "serde-rs/serde" }

serde_codegen_internals/src/ast.rs

@@ -1,116 +0,0 @@
-use syn;
-use attr;
-use Ctxt;
-
-pub struct Item<'a> {
-    pub ident: syn::Ident,
-    pub attrs: attr::Item,
-    pub body: Body<'a>,
-    pub generics: &'a syn::Generics,
-}
-
-pub enum Body<'a> {
-    Enum(Vec<Variant<'a>>),
-    Struct(Style, Vec<Field<'a>>),
-}
-
-pub struct Variant<'a> {
-    pub ident: syn::Ident,
-    pub attrs: attr::Variant,
-    pub style: Style,
-    pub fields: Vec<Field<'a>>,
-}
-
-pub struct Field<'a> {
-    pub ident: Option<syn::Ident>,
-    pub attrs: attr::Field,
-    pub ty: &'a syn::Ty,
-}
-
-pub enum Style {
-    Struct,
-    Tuple,
-    Newtype,
-    Unit,
-}
-
-impl<'a> Item<'a> {
-    pub fn from_ast(cx: &Ctxt, item: &'a syn::MacroInput) -> Item<'a> {
-        let attrs = attr::Item::from_ast(cx, item);
-
-        let body = match item.body {
-            syn::Body::Enum(ref variants) => {
-                Body::Enum(enum_from_ast(cx, variants))
-            }
-            syn::Body::Struct(ref variant_data) => {
-                let (style, fields) = struct_from_ast(cx, variant_data);
-                Body::Struct(style, fields)
-            }
-        };
-
-        Item {
-            ident: item.ident.clone(),
-            attrs: attrs,
-            body: body,
-            generics: &item.generics,
-        }
-    }
-}
-
-impl<'a> Body<'a> {
-    pub fn all_fields(&'a self) -> Box<Iterator<Item=&'a Field<'a>> + 'a> {
-        match *self {
-            Body::Enum(ref variants) => {
-                Box::new(variants.iter()
-                             .flat_map(|variant| variant.fields.iter()))
-            }
-            Body::Struct(_, ref fields) => {
-                Box::new(fields.iter())
-            }
-        }
-    }
-}
-
-fn enum_from_ast<'a>(cx: &Ctxt, variants: &'a [syn::Variant]) -> Vec<Variant<'a>> {
-    variants.iter()
-        .map(|variant| {
-            let (style, fields) = struct_from_ast(cx, &variant.data);
-            Variant {
-                ident: variant.ident.clone(),
-                attrs: attr::Variant::from_ast(cx, variant),
-                style: style,
-                fields: fields,
-            }
-        })
-        .collect()
-}
-
-fn struct_from_ast<'a>(cx: &Ctxt, data: &'a syn::VariantData) -> (Style, Vec<Field<'a>>) {
-    match *data {
-        syn::VariantData::Struct(ref fields) => {
-            (Style::Struct, fields_from_ast(cx, fields))
-        }
-        syn::VariantData::Tuple(ref fields) if fields.len() == 1 => {
-            (Style::Newtype, fields_from_ast(cx, fields))
-        }
-        syn::VariantData::Tuple(ref fields) => {
-            (Style::Tuple, fields_from_ast(cx, fields))
-        }
-        syn::VariantData::Unit => {
-            (Style::Unit, Vec::new())
-        }
-    }
-}
-
-fn fields_from_ast<'a>(cx: &Ctxt, fields: &'a [syn::Field]) -> Vec<Field<'a>> {
-    fields.iter()
-        .enumerate()
-        .map(|(i, field)| {
-            Field {
-                ident: field.ident.clone(),
-                attrs: attr::Field::from_ast(cx, i, field),
-                ty: &field.ty,
-            }
-        })
-        .collect()
-}

serde_codegen_internals/src/attr.rs

@@ -1,628 +0,0 @@
-use Ctxt;
-use syn;
-use syn::MetaItem::{List, NameValue, Word};
-use syn::NestedMetaItem::{Literal, MetaItem};
-
-// This module handles parsing of `#[serde(...)]` attributes. The entrypoints
-// are `attr::Item::from_ast`, `attr::Variant::from_ast`, and
-// `attr::Field::from_ast`. Each returns an instance of the corresponding
-// struct. Note that none of them return a Result. Unrecognized, malformed, or
-// duplicated attributes result in a span_err but otherwise are ignored. The
-// user will see errors simultaneously for all bad attributes in the crate
-// rather than just the first.
-
-struct Attr<'c, T> {
-    cx: &'c Ctxt,
-    name: &'static str,
-    value: Option<T>,
-}
-
-impl<'c, T> Attr<'c, T> {
-    fn none(cx: &'c Ctxt, name: &'static str) -> Self {
-        Attr {
-            cx: cx,
-            name: name,
-            value: None,
-        }
-    }
-
-    fn set(&mut self, value: T) {
-        if self.value.is_some() {
-            self.cx.error(format!("duplicate serde attribute `{}`", self.name));
-        } else {
-            self.value = Some(value);
-        }
-    }
-
-    fn set_opt(&mut self, value: Option<T>) {
-        if let Some(value) = value {
-            self.set(value);
-        }
-    }
-
-    fn set_if_none(&mut self, value: T) {
-        if self.value.is_none() {
-            self.value = Some(value);
-        }
-    }
-
-    fn get(self) -> Option<T> {
-        self.value
-    }
-}
-
-struct BoolAttr<'c>(Attr<'c, ()>);
-
-impl<'c> BoolAttr<'c> {
-    fn none(cx: &'c Ctxt, name: &'static str) -> Self {
-        BoolAttr(Attr::none(cx, name))
-    }
-
-    fn set_true(&mut self) {
-        self.0.set(());
-    }
-
-    fn get(&self) -> bool {
-        self.0.value.is_some()
-    }
-}
-
-#[derive(Debug)]
-pub struct Name {
-    serialize: String,
-    deserialize: String,
-}
-
-impl Name {
-    /// Return the container name for the container when serializing.
-    pub fn serialize_name(&self) -> String {
-        self.serialize.clone()
-    }
-
-    /// Return the container name for the container when deserializing.
-    pub fn deserialize_name(&self) -> String {
-        self.deserialize.clone()
-    }
-}
-
-/// Represents container (e.g. struct) attribute information
-#[derive(Debug)]
-pub struct Item {
-    name: Name,
-    deny_unknown_fields: bool,
-    ser_bound: Option<Vec<syn::WherePredicate>>,
-    de_bound: Option<Vec<syn::WherePredicate>>,
-    tag: EnumTag,
-}
-
-/// Styles of representing an enum.
-#[derive(Debug)]
-pub enum EnumTag {
-    /// The default.
-    ///
-    /// ```json
-    /// {"variant1": {"key1": "value1", "key2": "value2"}}
-    /// ```
-    External,
-
-    /// `#[serde(tag = "type")]`
-    ///
-    /// ```json
-    /// {"type": "variant1", "key1": "value1", "key2": "value2"}
-    /// ```
-    Internal(String),
-
-    /// `#[serde(untagged)]`
-    ///
-    /// ```json
-    /// {"key1": "value1", "key2": "value2"}
-    /// ```
-    None,
-}
-
-impl Item {
-    /// Extract out the `#[serde(...)]` attributes from an item.
-    pub fn from_ast(cx: &Ctxt, item: &syn::MacroInput) -> Self {
-        let mut ser_name = Attr::none(cx, "rename");
-        let mut de_name = Attr::none(cx, "rename");
-        let mut deny_unknown_fields = BoolAttr::none(cx, "deny_unknown_fields");
-        let mut ser_bound = Attr::none(cx, "bound");
-        let mut de_bound = Attr::none(cx, "bound");
-        let mut untagged = BoolAttr::none(cx, "untagged");
-        let mut internal_tag = Attr::none(cx, "tag");
-
-        for meta_items in item.attrs.iter().filter_map(get_serde_meta_items) {
-            for meta_item in meta_items {
-                match meta_item {
-                    // Parse `#[serde(rename="foo")]`
-                    MetaItem(NameValue(ref name, ref lit)) if name == "rename" => {
-                        if let Ok(s) = get_string_from_lit(cx, name.as_ref(), name.as_ref(), lit) {
-                            ser_name.set(s.clone());
-                            de_name.set(s);
-                        }
-                    }
-
-                    // Parse `#[serde(rename(serialize="foo", deserialize="bar"))]`
-                    MetaItem(List(ref name, ref meta_items)) if name == "rename" => {
-                        if let Ok((ser, de)) = get_renames(cx, meta_items) {
-                            ser_name.set_opt(ser);
-                            de_name.set_opt(de);
-                        }
-                    }
-
-                    // Parse `#[serde(deny_unknown_fields)]`
-                    MetaItem(Word(ref name)) if name == "deny_unknown_fields" => {
-                        deny_unknown_fields.set_true();
-                    }
-
-                    // Parse `#[serde(bound="D: Serialize")]`
-                    MetaItem(NameValue(ref name, ref lit)) if name == "bound" => {
-                        if let Ok(where_predicates) = parse_lit_into_where(cx, name.as_ref(), name.as_ref(), lit) {
-                            ser_bound.set(where_predicates.clone());
-                            de_bound.set(where_predicates);
-                        }
-                    }
-
-                    // Parse `#[serde(bound(serialize="D: Serialize", deserialize="D: Deserialize"))]`
-                    MetaItem(List(ref name, ref meta_items)) if name == "bound" => {
-                        if let Ok((ser, de)) = get_where_predicates(cx, meta_items) {
-                            ser_bound.set_opt(ser);
-                            de_bound.set_opt(de);
-                        }
-                    }
-
-                    // Parse `#[serde(untagged)]`
-                    MetaItem(Word(ref name)) if name == "untagged" => {
-                        match item.body {
-                            syn::Body::Enum(_) => {
-                                untagged.set_true();
-                            }
-                            syn::Body::Struct(_) => {
-                                cx.error("#[serde(untagged)] can only be used on enums")
-                            }
-                        }
-                    }
-
-                    // Parse `#[serde(tag = "type")]`
-                    MetaItem(NameValue(ref name, ref lit)) if name == "tag" => {
-                        if let Ok(s) = get_string_from_lit(cx, name.as_ref(), name.as_ref(), lit) {
-                            match item.body {
-                                syn::Body::Enum(_) => {
-                                    internal_tag.set(s);
-                                }
-                                syn::Body::Struct(_) => {
-                                    cx.error("#[serde(tag = \"...\")] can only be used on enums")
-                                }
-                            }
-                        }
-                    }
-
-                    MetaItem(ref meta_item) => {
-                        cx.error(format!("unknown serde container attribute `{}`",
-                                         meta_item.name()));
-                    }
-
-                    Literal(_) => {
-                        cx.error("unexpected literal in serde container attribute");
-                    }
-                }
-            }
-        }
-
-        let tag = match (untagged.get(), internal_tag.get()) {
-            (false, None) => EnumTag::External,
-            (true, None) => EnumTag::None,
-            (false, Some(tag)) => {
-                // Check that there are no tuple variants.
-                if let syn::Body::Enum(ref variants) = item.body {
-                    for variant in variants {
-                        match variant.data {
-                            syn::VariantData::Struct(_) | syn::VariantData::Unit => {}
-                            syn::VariantData::Tuple(ref fields) => {
-                                if fields.len() != 1 {
-                                    cx.error("#[serde(tag = \"...\")] cannot be used with tuple variants");
-                                    break;
-                                }
-                            }
-                        }
-                    }
-                }
-                EnumTag::Internal(tag)
-            }
-            (true, Some(_)) => {
-                cx.error("enum cannot be both untagged and internally tagged");
-                EnumTag::External // doesn't matter, will error
-            }
-        };
-
-        Item {
-            name: Name {
-                serialize: ser_name.get().unwrap_or_else(|| item.ident.to_string()),
-                deserialize: de_name.get().unwrap_or_else(|| item.ident.to_string()),
-            },
-            deny_unknown_fields: deny_unknown_fields.get(),
-            ser_bound: ser_bound.get(),
-            de_bound: de_bound.get(),
-            tag: tag,
-        }
-    }
-
-    pub fn name(&self) -> &Name {
-        &self.name
-    }
-
-    pub fn deny_unknown_fields(&self) -> bool {
-        self.deny_unknown_fields
-    }
-
-    pub fn ser_bound(&self) -> Option<&[syn::WherePredicate]> {
-        self.ser_bound.as_ref().map(|vec| &vec[..])
-    }
-
-    pub fn de_bound(&self) -> Option<&[syn::WherePredicate]> {
-        self.de_bound.as_ref().map(|vec| &vec[..])
-    }
-
-    pub fn tag(&self) -> &EnumTag {
-        &self.tag
-    }
-}
-
-/// Represents variant attribute information
-#[derive(Debug)]
-pub struct Variant {
-    name: Name,
-    skip_deserializing: bool,
-    skip_serializing: bool,
-}
-
-impl Variant {
-    pub fn from_ast(cx: &Ctxt, variant: &syn::Variant) -> Self {
-        let mut ser_name = Attr::none(cx, "rename");
-        let mut de_name = Attr::none(cx, "rename");
-        let mut skip_deserializing = BoolAttr::none(cx, "skip_deserializing");
-        let mut skip_serializing = BoolAttr::none(cx, "skip_serializing");
-
-        for meta_items in variant.attrs.iter().filter_map(get_serde_meta_items) {
-            for meta_item in meta_items {
-                match meta_item {
-                    // Parse `#[serde(rename="foo")]`
-                    MetaItem(NameValue(ref name, ref lit)) if name == "rename" => {
-                        if let Ok(s) = get_string_from_lit(cx, name.as_ref(), name.as_ref(), lit) {
-                            ser_name.set(s.clone());
-                            de_name.set(s);
-                        }
-                    }
-
-                    // Parse `#[serde(rename(serialize="foo", deserialize="bar"))]`
-                    MetaItem(List(ref name, ref meta_items)) if name == "rename" => {
-                        if let Ok((ser, de)) = get_renames(cx, meta_items) {
-                            ser_name.set_opt(ser);
-                            de_name.set_opt(de);
-                        }
-                    }
-                    // Parse `#[serde(skip_deserializing)]`
-                    MetaItem(Word(ref name)) if name == "skip_deserializing" => {
-                        skip_deserializing.set_true();
-                    }
-                    // Parse `#[serde(skip_serializing)]`
-                    MetaItem(Word(ref name)) if name == "skip_serializing" => {
-                        skip_serializing.set_true();
-                    }
-
-                    MetaItem(ref meta_item) => {
-                        cx.error(format!("unknown serde variant attribute `{}`",
-                                         meta_item.name()));
-                    }
-
-                    Literal(_) => {
-                        cx.error("unexpected literal in serde variant attribute");
-                    }
-                }
-            }
-        }
-
-        Variant {
-            name: Name {
-                serialize: ser_name.get().unwrap_or_else(|| variant.ident.to_string()),
-                deserialize: de_name.get().unwrap_or_else(|| variant.ident.to_string()),
-            },
-            skip_deserializing: skip_deserializing.get(),
-            skip_serializing: skip_serializing.get(),
-        }
-    }
-
-    pub fn name(&self) -> &Name {
-        &self.name
-    }
-
-    pub fn skip_deserializing(&self) -> bool {
-        self.skip_deserializing
-    }
-
-    pub fn skip_serializing(&self) -> bool {
-        self.skip_serializing
-    }
-}
-
-/// Represents field attribute information
-#[derive(Debug)]
-pub struct Field {
-    name: Name,
-    skip_serializing: bool,
-    skip_deserializing: bool,
-    skip_serializing_if: Option<syn::Path>,
-    default: FieldDefault,
-    serialize_with: Option<syn::Path>,
-    deserialize_with: Option<syn::Path>,
-    ser_bound: Option<Vec<syn::WherePredicate>>,
-    de_bound: Option<Vec<syn::WherePredicate>>,
-}
-
-/// Represents the default to use for a field when deserializing.
-#[derive(Debug, PartialEq)]
-pub enum FieldDefault {
-    /// Field must always be specified because it does not have a default.
-    None,
-    /// The default is given by `std::default::Default::default()`.
-    Default,
-    /// The default is given by this function.
-    Path(syn::Path),
-}
-
-impl Field {
-    /// Extract out the `#[serde(...)]` attributes from a struct field.
-    pub fn from_ast(cx: &Ctxt,
-                    index: usize,
-                    field: &syn::Field) -> Self {
-        let mut ser_name = Attr::none(cx, "rename");
-        let mut de_name = Attr::none(cx, "rename");
-        let mut skip_serializing = BoolAttr::none(cx, "skip_serializing");
-        let mut skip_deserializing = BoolAttr::none(cx, "skip_deserializing");
-        let mut skip_serializing_if = Attr::none(cx, "skip_serializing_if");
-        let mut default = Attr::none(cx, "default");
-        let mut serialize_with = Attr::none(cx, "serialize_with");
-        let mut deserialize_with = Attr::none(cx, "deserialize_with");
-        let mut ser_bound = Attr::none(cx, "bound");
-        let mut de_bound = Attr::none(cx, "bound");
-
-        let ident = match field.ident {
-            Some(ref ident) => ident.to_string(),
-            None => index.to_string(),
-        };
-
-        for meta_items in field.attrs.iter().filter_map(get_serde_meta_items) {
-            for meta_item in meta_items {
-                match meta_item {
-                    // Parse `#[serde(rename="foo")]`
-                    MetaItem(NameValue(ref name, ref lit)) if name == "rename" => {
-                        if let Ok(s) = get_string_from_lit(cx, name.as_ref(), name.as_ref(), lit) {
-                            ser_name.set(s.clone());
-                            de_name.set(s);
-                        }
-                    }
-
-                    // Parse `#[serde(rename(serialize="foo", deserialize="bar"))]`
-                    MetaItem(List(ref name, ref meta_items)) if name == "rename" => {
-                        if let Ok((ser, de)) = get_renames(cx, meta_items) {
-                            ser_name.set_opt(ser);
-                            de_name.set_opt(de);
-                        }
-                    }
-
-                    // Parse `#[serde(default)]`
-                    MetaItem(Word(ref name)) if name == "default" => {
-                        default.set(FieldDefault::Default);
-                    }
-
-                    // Parse `#[serde(default="...")]`
-                    MetaItem(NameValue(ref name, ref lit)) if name == "default" => {
-                        if let Ok(path) = parse_lit_into_path(cx, name.as_ref(), lit) {
-                            default.set(FieldDefault::Path(path));
-                        }
-                    }
-
-                    // Parse `#[serde(skip_serializing)]`
-                    MetaItem(Word(ref name)) if name == "skip_serializing" => {
-                        skip_serializing.set_true();
-                    }
-
-                    // Parse `#[serde(skip_deserializing)]`
-                    MetaItem(Word(ref name)) if name == "skip_deserializing" => {
-                        skip_deserializing.set_true();
-                    }
-
-                    // Parse `#[serde(skip_serializing_if="...")]`
-                    MetaItem(NameValue(ref name, ref lit)) if name == "skip_serializing_if" => {
-                        if let Ok(path) = parse_lit_into_path(cx, name.as_ref(), lit) {
-                            skip_serializing_if.set(path);
-                        }
-                    }
-
-                    // Parse `#[serde(serialize_with="...")]`
-                    MetaItem(NameValue(ref name, ref lit)) if name == "serialize_with" => {
-                        if let Ok(path) = parse_lit_into_path(cx, name.as_ref(), lit) {
-                            serialize_with.set(path);
-                        }
-                    }
-
-                    // Parse `#[serde(deserialize_with="...")]`
-                    MetaItem(NameValue(ref name, ref lit)) if name == "deserialize_with" => {
-                        if let Ok(path) = parse_lit_into_path(cx, name.as_ref(), lit) {
-                            deserialize_with.set(path);
-                        }
-                    }
-
-                    // Parse `#[serde(bound="D: Serialize")]`
-                    MetaItem(NameValue(ref name, ref lit)) if name == "bound" => {
-                        if let Ok(where_predicates) = parse_lit_into_where(cx, name.as_ref(), name.as_ref(), lit) {
-                            ser_bound.set(where_predicates.clone());
-                            de_bound.set(where_predicates);
-                        }
-                    }
-
-                    // Parse `#[serde(bound(serialize="D: Serialize", deserialize="D: Deserialize"))]`
-                    MetaItem(List(ref name, ref meta_items)) if name == "bound" => {
-                        if let Ok((ser, de)) = get_where_predicates(cx, meta_items) {
-                            ser_bound.set_opt(ser);
-                            de_bound.set_opt(de);
-                        }
-                    }
-
-                    MetaItem(ref meta_item) => {
-                        cx.error(format!("unknown serde field attribute `{}`",
-                                         meta_item.name()));
-                    }
-
-                    Literal(_) => {
-                        cx.error("unexpected literal in serde field attribute");
-                    }
-                }
-            }
-        }
-
-        // Is skip_deserializing, initialize the field to Default::default()
-        // unless a different default is specified by `#[serde(default="...")]`
-        if skip_deserializing.0.value.is_some() {
-            default.set_if_none(FieldDefault::Default);
-        }
-
-        Field {
-            name: Name {
-                serialize: ser_name.get().unwrap_or_else(|| ident.clone()),
-                deserialize: de_name.get().unwrap_or(ident),
-            },
-            skip_serializing: skip_serializing.get(),
-            skip_deserializing: skip_deserializing.get(),
-            skip_serializing_if: skip_serializing_if.get(),
-            default: default.get().unwrap_or(FieldDefault::None),
-            serialize_with: serialize_with.get(),
-            deserialize_with: deserialize_with.get(),
-            ser_bound: ser_bound.get(),
-            de_bound: de_bound.get(),
-        }
-    }
-
-    pub fn name(&self) -> &Name {
-        &self.name
-    }
-
-    pub fn skip_serializing(&self) -> bool {
-        self.skip_serializing
-    }
-
-    pub fn skip_deserializing(&self) -> bool {
-        self.skip_deserializing
-    }
-
-    pub fn skip_serializing_if(&self) -> Option<&syn::Path> {
-        self.skip_serializing_if.as_ref()
-    }
-
-    pub fn default(&self) -> &FieldDefault {
-        &self.default
-    }
-
-    pub fn serialize_with(&self) -> Option<&syn::Path> {
-        self.serialize_with.as_ref()
-    }
-
-    pub fn deserialize_with(&self) -> Option<&syn::Path> {
-        self.deserialize_with.as_ref()
-    }
-
-    pub fn ser_bound(&self) -> Option<&[syn::WherePredicate]> {
-        self.ser_bound.as_ref().map(|vec| &vec[..])
-    }
-
-    pub fn de_bound(&self) -> Option<&[syn::WherePredicate]> {
-        self.de_bound.as_ref().map(|vec| &vec[..])
-    }
-}
-
-type SerAndDe<T> = (Option<T>, Option<T>);
-
-fn get_ser_and_de<T, F>(
-    cx: &Ctxt,
-    attr_name: &'static str,
-    items: &[syn::NestedMetaItem],
-    f: F
-) -> Result<SerAndDe<T>, ()>
-    where F: Fn(&Ctxt, &str, &str, &syn::Lit) -> Result<T, ()>,
-{
-    let mut ser_item = Attr::none(cx, attr_name);
-    let mut de_item = Attr::none(cx, attr_name);
-
-    for item in items {
-        match *item {
-            MetaItem(NameValue(ref name, ref lit)) if name == "serialize" => {
-                if let Ok(v) = f(cx, attr_name, name.as_ref(), lit) {
-                    ser_item.set(v);
-                }
-            }
-
-            MetaItem(NameValue(ref name, ref lit)) if name == "deserialize" => {
-                if let Ok(v) = f(cx, attr_name, name.as_ref(), lit) {
-                    de_item.set(v);
-                }
-            }
-
-            _ => {
-                cx.error(format!("malformed {0} attribute, expected `{0}(serialize = ..., deserialize = ...)`",
-                                 attr_name));
-                return Err(());
-            }
-        }
-    }
-
-    Ok((ser_item.get(), de_item.get()))
-}
-
-fn get_renames(
-    cx: &Ctxt,
-    items: &[syn::NestedMetaItem],
-) -> Result<SerAndDe<String>, ()> {
-    get_ser_and_de(cx, "rename", items, get_string_from_lit)
-}
-
-fn get_where_predicates(
-    cx: &Ctxt,
-    items: &[syn::NestedMetaItem],
-) -> Result<SerAndDe<Vec<syn::WherePredicate>>, ()> {
-    get_ser_and_de(cx, "bound", items, parse_lit_into_where)
-}
-
-pub fn get_serde_meta_items(attr: &syn::Attribute) -> Option<Vec<syn::NestedMetaItem>> {
-    match attr.value {
-        List(ref name, ref items) if name == "serde" => {
-            Some(items.iter().cloned().collect())
-        }
-        _ => None
-    }
-}
-
-fn get_string_from_lit(cx: &Ctxt, attr_name: &str, meta_item_name: &str, lit: &syn::Lit) -> Result<String, ()> {
-    if let syn::Lit::Str(ref s, _) = *lit {
-        Ok(s.clone())
-    } else {
-        cx.error(format!("expected serde {} attribute to be a string: `{} = \"...\"`",
-                         attr_name, meta_item_name));
-        Err(())
-    }
-}
-
-fn parse_lit_into_path(cx: &Ctxt, attr_name: &str, lit: &syn::Lit) -> Result<syn::Path, ()> {
-    let string = try!(get_string_from_lit(cx, attr_name, attr_name, lit));
-    syn::parse_path(&string).map_err(|err| cx.error(err))
-}
-
-fn parse_lit_into_where(cx: &Ctxt, attr_name: &str, meta_item_name: &str, lit: &syn::Lit) -> Result<Vec<syn::WherePredicate>, ()> {
-    let string = try!(get_string_from_lit(cx, attr_name, meta_item_name, lit));
-    if string.is_empty() {
-        return Ok(Vec::new());
-    }
-
-    let where_string = format!("where {}", string);
-
-    syn::parse_where_clause(&where_string).map(|wh| wh.predicates).map_err(|err| cx.error(err))
-}

serde_codegen_internals/src/ctxt.rs

@@ -1,43 +0,0 @@
-use std::fmt::Display;
-use std::cell::RefCell;
-
-#[derive(Default)]
-pub struct Ctxt {
-    errors: RefCell<Option<Vec<String>>>,
-}
-
-impl Ctxt {
-    pub fn new() -> Self {
-        Ctxt {
-            errors: RefCell::new(Some(Vec::new())),
-        }
-    }
-
-    pub fn error<T: Display>(&self, msg: T) {
-        self.errors.borrow_mut().as_mut().unwrap().push(msg.to_string());
-    }
-
-    pub fn check(self) -> Result<(), String> {
-        let mut errors = self.errors.borrow_mut().take().unwrap();
-        match errors.len() {
-            0 => Ok(()),
-            1 => Err(errors.pop().unwrap()),
-            n => {
-                let mut msg = format!("{} errors:", n);
-                for err in errors {
-                    msg.push_str("\n\t# ");
-                    msg.push_str(&err);
-                }
-                Err(msg)
-            }
-        }
-    }
-}
-
-impl Drop for Ctxt {
-    fn drop(&mut self) {
-        if self.errors.borrow().is_some() {
-            panic!("forgot to check for errors");
-        }
-    }
-}

serde_codegen_internals/src/lib.rs

@@ -1,7 +0,0 @@
-extern crate syn;
-
-pub mod ast;
-pub mod attr;
-
-mod ctxt;
-pub use ctxt::Ctxt;

serde_derive/Cargo.toml

@@ -1,26 +0,0 @@
-[package]
-name = "serde_derive"
-version = "0.9.7"
-authors = ["Erick Tryzelaar <erick.tryzelaar@gmail.com>"]
-license = "MIT/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/codegen.html"
-keywords = ["serde", "serialization", "no_std"]
-include = ["Cargo.toml", "src/**/*.rs"]
-
-[features]
-unstable = []
-
-[badges]
-travis-ci = { repository = "serde-rs/serde" }
-
-[lib]
-name = "serde_derive"
-proc-macro = true
-
-[dependencies]
-quote = "0.3.8"
-serde_codegen_internals = { version = "=0.13.0", default-features = false, path = "../serde_codegen_internals" }
-syn = { version = "0.11", features = ["aster", "visit"] }

serde_derive/src/bound.rs

@@ -1,121 +0,0 @@
-use std::collections::HashSet;
-
-use syn::{self, aster, visit};
-
-use internals::ast::Item;
-use internals::attr;
-
-// 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 {
-        ty_params: generics.ty_params.iter().map(|ty_param| {
-            syn::TyParam {
-                default: None,
-                .. ty_param.clone()
-            }}).collect(),
-        .. generics.clone()
-    }
-}
-
-pub fn with_where_predicates(
-    generics: &syn::Generics,
-    predicates: &[syn::WherePredicate],
-) -> syn::Generics {
-    aster::from_generics(generics.clone())
-        .with_predicates(predicates.to_vec())
-        .build()
-}
-
-pub fn with_where_predicates_from_fields<F>(
-    item: &Item,
-    generics: &syn::Generics,
-    from_field: F,
-) -> syn::Generics
-    where F: Fn(&attr::Field) -> Option<&[syn::WherePredicate]>,
-{
-    aster::from_generics(generics.clone())
-        .with_predicates(
-            item.body.all_fields()
-                .flat_map(|field| from_field(&field.attrs))
-                .flat_map(|predicates| predicates.to_vec()))
-        .build()
-}
-
-// 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<F>(
-    item: &Item,
-    generics: &syn::Generics,
-    filter: F,
-    bound: &syn::Path,
-) -> syn::Generics
-    where F: Fn(&attr::Field) -> bool,
-{
-    struct FindTyParams {
-        // Set of all generic type parameters on the current struct (A, B, C in
-        // the example). Initialized up front.
-        all_ty_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_ty_params: HashSet<syn::Ident>,
-    }
-    impl visit::Visitor for FindTyParams {
-        fn visit_path(&mut self, path: &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.global && path.segments.len() == 1 {
-                let id = path.segments[0].ident.clone();
-                if self.all_ty_params.contains(&id) {
-                    self.relevant_ty_params.insert(id);
-                }
-            }
-            visit::walk_path(self, path);
-        }
-    }
-
-    let all_ty_params: HashSet<_> = generics.ty_params.iter()
-        .map(|ty_param| ty_param.ident.clone())
-        .collect();
-
-    let relevant_tys = item.body.all_fields()
-        .filter(|&field| filter(&field.attrs))
-        .map(|field| &field.ty);
-
-    let mut visitor = FindTyParams {
-        all_ty_params: all_ty_params,
-        relevant_ty_params: HashSet::new(),
-    };
-    for ty in relevant_tys {
-        visit::walk_ty(&mut visitor, ty);
-    }
-
-    aster::from_generics(generics.clone())
-        .with_predicates(
-            generics.ty_params.iter()
-                .map(|ty_param| ty_param.ident.clone())
-                .filter(|id| visitor.relevant_ty_params.contains(id))
-                .map(|id| aster::where_predicate()
-                    // the type parameter that is being bounded e.g. T
-                    .bound().build(aster::ty().id(id))
-                    // the bound e.g. Serialize
-                    .bound().trait_(bound.clone()).build()
-                    .build()))
-        .build()
-}

serde_derive/src/lib.rs

@@ -1,36 +0,0 @@
-#![cfg_attr(feature = "cargo-clippy", allow(too_many_arguments))]
-#![cfg_attr(feature = "cargo-clippy", allow(used_underscore_binding))]
-
-// The `quote!` macro requires deep recursion.
-#![recursion_limit = "192"]
-
-extern crate syn;
-#[macro_use]
-extern crate quote;
-
-extern crate serde_codegen_internals as internals;
-
-extern crate proc_macro;
-use proc_macro::TokenStream;
-
-mod bound;
-mod de;
-mod ser;
-
-#[proc_macro_derive(Serialize, attributes(serde))]
-pub fn derive_serialize(input: TokenStream) -> TokenStream {
-    let input = syn::parse_derive_input(&input.to_string()).unwrap();
-    match ser::expand_derive_serialize(&input) {
-        Ok(expanded) => expanded.parse().unwrap(),
-        Err(msg) => panic!(msg),
-    }
-}
-
-#[proc_macro_derive(Deserialize, attributes(serde))]
-pub fn derive_deserialize(input: TokenStream) -> TokenStream {
-    let input = syn::parse_derive_input(&input.to_string()).unwrap();
-    match de::expand_derive_deserialize(&input) {
-        Ok(expanded) => expanded.parse().unwrap(),
-        Err(msg) => panic!(msg),
-    }
-}

serde_derive/src/ser.rs

@@ -1,811 +0,0 @@
-use syn::{self, aster, Ident};
-use quote::Tokens;
-
-use bound;
-use internals::ast::{Body, Field, Item, Style, Variant};
-use internals::{self, attr};
-
-pub fn expand_derive_serialize(item: &syn::DeriveInput) -> Result<Tokens, String> {
-    let ctxt = internals::Ctxt::new();
-    let item = Item::from_ast(&ctxt, item);
-    try!(ctxt.check());
-
-    let impl_generics = build_impl_generics(&item);
-
-    let ty = aster::ty().path()
-        .segment(item.ident.clone()).with_generics(impl_generics.clone()).build()
-        .build();
-
-    let body = serialize_body(&item,
-                              &impl_generics,
-                              ty.clone());
-
-    let where_clause = &impl_generics.where_clause;
-
-    let dummy_const = Ident::new(format!("_IMPL_SERIALIZE_FOR_{}", item.ident));
-
-    Ok(quote! {
-        #[allow(non_upper_case_globals, unused_attributes, unused_qualifications)]
-        const #dummy_const: () = {
-            extern crate serde as _serde;
-            #[automatically_derived]
-            impl #impl_generics _serde::Serialize for #ty #where_clause {
-                fn serialize<__S>(&self, _serializer: __S) -> _serde::export::Result<__S::Ok, __S::Error>
-                    where __S: _serde::Serializer
-                {
-                    #body
-                }
-            }
-        };
-    })
-}
-
-// All the generics in the input, plus a bound `T: Serialize` for each generic
-// field type that will be serialized by us.
-fn build_impl_generics(item: &Item) -> syn::Generics {
-    let generics = bound::without_defaults(item.generics);
-
-    let generics = bound::with_where_predicates_from_fields(
-        item, &generics,
-        |attrs| attrs.ser_bound());
-
-    match item.attrs.ser_bound() {
-        Some(predicates) => {
-            bound::with_where_predicates(&generics, predicates)
-        }
-        None => {
-            bound::with_bound(item, &generics,
-                needs_serialize_bound,
-                &aster::path().ids(&["_serde", "Serialize"]).build())
-        }
-    }
-}
-
-// Fields with a `skip_serializing` or `serialize_with` attribute are not
-// serialized by us so we do not generate a bound. Fields with a `bound`
-// attribute specify their own bound so we do not generate one. All other fields
-// may need a `T: Serialize` bound where T is the type of the field.
-fn needs_serialize_bound(attrs: &attr::Field) -> bool {
-    !attrs.skip_serializing()
-        && attrs.serialize_with().is_none()
-        && attrs.ser_bound().is_none()
-}
-
-fn serialize_body(
-    item: &Item,
-    impl_generics: &syn::Generics,
-    ty: syn::Ty,
-) -> Tokens {
-    match item.body {
-        Body::Enum(ref variants) => {
-            serialize_item_enum(
-                &item.ident,
-                impl_generics,
-                ty,
-                variants,
-                &item.attrs)
-        }
-        Body::Struct(Style::Struct, ref fields) => {
-            if fields.iter().any(|field| field.ident.is_none()) {
-                panic!("struct has unnamed fields");
-            }
-
-            serialize_struct(
-                impl_generics,
-                ty,
-                fields,
-                &item.attrs)
-        }
-        Body::Struct(Style::Tuple, ref fields) => {
-            if fields.iter().any(|field| field.ident.is_some()) {
-                panic!("tuple struct has named fields");
-            }
-
-            serialize_tuple_struct(
-                impl_generics,
-                ty,
-                fields,
-                &item.attrs)
-        }
-        Body::Struct(Style::Newtype, ref fields) => {
-            serialize_newtype_struct(
-                impl_generics,
-                ty,
-                &fields[0],
-                &item.attrs)
-        }
-        Body::Struct(Style::Unit, _) => {
-            serialize_unit_struct(
-                &item.attrs)
-        }
-    }
-}
-
-fn serialize_unit_struct(item_attrs: &attr::Item) -> Tokens {
-    let type_name = item_attrs.name().serialize_name();
-
-    quote! {
-        _serde::Serializer::serialize_unit_struct(_serializer, #type_name)
-    }
-}
-
-fn serialize_newtype_struct(
-    impl_generics: &syn::Generics,
-    item_ty: syn::Ty,
-    field: &Field,
-    item_attrs: &attr::Item,
-) -> Tokens {
-    let type_name = item_attrs.name().serialize_name();
-
-    let mut field_expr = quote!(&self.0);
-    if let Some(path) = field.attrs.serialize_with() {
-        field_expr = wrap_serialize_with(
-            &item_ty, impl_generics, field.ty, path, field_expr);
-    }
-
-    quote! {
-        _serde::Serializer::serialize_newtype_struct(_serializer, #type_name, #field_expr)
-    }
-}
-
-fn serialize_tuple_struct(
-    impl_generics: &syn::Generics,
-    ty: syn::Ty,
-    fields: &[Field],
-    item_attrs: &attr::Item,
-) -> Tokens {
-    let serialize_stmts = serialize_tuple_struct_visitor(
-        ty.clone(),
-        fields,
-        impl_generics,
-        false,
-        quote!(_serde::ser::SerializeTupleStruct::serialize_field),
-    );
-
-    let type_name = item_attrs.name().serialize_name();
-    let len = serialize_stmts.len();
-    let let_mut = mut_if(len > 0);
-
-    quote! {
-        let #let_mut __serde_state = try!(_serde::Serializer::serialize_tuple_struct(_serializer, #type_name, #len));
-        #(#serialize_stmts)*
-        _serde::ser::SerializeTupleStruct::end(__serde_state)
-    }
-}
-
-fn serialize_struct(
-    impl_generics: &syn::Generics,
-    ty: syn::Ty,
-    fields: &[Field],
-    item_attrs: &attr::Item,
-) -> Tokens {
-    let serialize_fields = serialize_struct_visitor(
-        ty.clone(),
-        fields,
-        impl_generics,
-        false,
-        quote!(_serde::ser::SerializeStruct::serialize_field),
-    );
-
-    let type_name = item_attrs.name().serialize_name();
-
-    let mut serialized_fields = fields.iter()
-        .filter(|&field| !field.attrs.skip_serializing())
-        .peekable();
-
-    let let_mut = mut_if(serialized_fields.peek().is_some());
-
-    let len = serialized_fields
-        .map(|field| {
-            let ident = field.ident.clone().expect("struct has unnamed fields");
-            let field_expr = quote!(&self.#ident);
-
-            match field.attrs.skip_serializing_if() {
-                Some(path) => quote!(if #path(#field_expr) { 0 } else { 1 }),
-                None => quote!(1),
-            }
-         })
-        .fold(quote!(0), |sum, expr| quote!(#sum + #expr));
-
-    quote! {
-        let #let_mut __serde_state = try!(_serde::Serializer::serialize_struct(_serializer, #type_name, #len));
-        #(#serialize_fields)*
-        _serde::ser::SerializeStruct::end(__serde_state)
-    }
-}
-
-fn serialize_item_enum(
-    type_ident: &syn::Ident,
-    impl_generics: &syn::Generics,
-    ty: syn::Ty,
-    variants: &[Variant],
-    item_attrs: &attr::Item,
-) -> Tokens {
-    let arms: Vec<_> =
-        variants.iter()
-            .enumerate()
-            .map(|(variant_index, variant)| {
-                serialize_variant(
-                    type_ident,
-                    impl_generics,
-                    ty.clone(),
-                    variant,
-                    variant_index,
-                    item_attrs,
-                )
-            })
-            .collect();
-
-    quote! {
-        match *self {
-            #(#arms)*
-        }
-    }
-}
-
-fn serialize_variant(
-    type_ident: &syn::Ident,
-    generics: &syn::Generics,
-    ty: syn::Ty,
-    variant: &Variant,
-    variant_index: usize,
-    item_attrs: &attr::Item,
-) -> Tokens {
-    let variant_ident = variant.ident.clone();
-
-    if variant.attrs.skip_serializing() {
-        let skipped_msg = format!("the enum variant {}::{} cannot be serialized",
-                                  type_ident, variant_ident);
-        let skipped_err = quote! {
-            _serde::export::Err(_serde::ser::Error::custom(#skipped_msg))
-        };
-        let fields_pat = match variant.style {
-            Style::Unit => quote!(),
-            Style::Newtype | Style::Tuple => quote!( (..) ),
-            Style::Struct => quote!( {..} ),
-        };
-        quote! {
-            #type_ident::#variant_ident #fields_pat => #skipped_err,
-        }
-    } else { // variant wasn't skipped
-        let case = match variant.style {
-            Style::Unit => {
-                quote! {
-                    #type_ident::#variant_ident
-                }
-            }
-            Style::Newtype => {
-                quote! {
-                    #type_ident::#variant_ident(ref __simple_value)
-                }
-            }
-            Style::Tuple => {
-                let field_names = (0 .. variant.fields.len())
-                    .map(|i| Ident::new(format!("__field{}", i)));
-                quote! {
-                    #type_ident::#variant_ident(#(ref #field_names),*)
-                }
-            }
-            Style::Struct => {
-                let fields = variant.fields.iter()
-                    .map(|f| f.ident.clone().expect("struct variant has unnamed fields"));
-                quote! {
-                    #type_ident::#variant_ident { #(ref #fields),* }
-                }
-            }
-        };
-
-        let body = match *item_attrs.tag() {
-            attr::EnumTag::External => {
-                serialize_externally_tagged_variant(
-                    generics,
-                    ty,
-                    variant,
-                    variant_index,
-                    item_attrs,
-                )
-            }
-            attr::EnumTag::Internal(ref tag) => {
-                serialize_internally_tagged_variant(
-                    type_ident.as_ref(),
-                    variant_ident.as_ref(),
-                    generics,
-                    ty,
-                    variant,
-                    item_attrs,
-                    tag,
-                )
-            }
-            attr::EnumTag::None => {
-                serialize_untagged_variant(
-                    generics,
-                    ty,
-                    variant,
-                    item_attrs,
-                )
-            }
-        };
-
-        quote! {
-            #case => #body
-        }
-    }
-}
-
-fn serialize_externally_tagged_variant(
-    generics: &syn::Generics,
-    ty: syn::Ty,
-    variant: &Variant,
-    variant_index: usize,
-    item_attrs: &attr::Item,
-) -> Tokens {
-    let type_name = item_attrs.name().serialize_name();
-    let variant_name = variant.attrs.name().serialize_name();
-
-    match variant.style {
-        Style::Unit => {
-            quote! {
-                _serde::Serializer::serialize_unit_variant(
-                    _serializer,
-                    #type_name,
-                    #variant_index,
-                    #variant_name,
-                ),
-            }
-        }
-        Style::Newtype => {
-            let field = &variant.fields[0];
-            let mut field_expr = quote!(__simple_value);
-            if let Some(path) = field.attrs.serialize_with() {
-                field_expr = wrap_serialize_with(
-                    &ty, generics, field.ty, path, field_expr);
-            }
-
-            quote! {
-                _serde::Serializer::serialize_newtype_variant(
-                    _serializer,
-                    #type_name,
-                    #variant_index,
-                    #variant_name,
-                    #field_expr,
-                ),
-            }
-        }
-        Style::Tuple => {
-            let block = serialize_tuple_variant(
-                TupleVariant::ExternallyTagged {
-                    type_name: type_name,
-                    variant_index: variant_index,
-                    variant_name: variant_name,
-                },
-                generics,
-                ty,
-                &variant.fields,
-            );
-
-            quote! {
-                { #block }
-            }
-        }
-        Style::Struct => {
-            let block = serialize_struct_variant(
-                StructVariant::ExternallyTagged {
-                    variant_index: variant_index,
-                    variant_name: variant_name,
-                },
-                generics,
-                ty,
-                &variant.fields,
-                item_attrs,
-            );
-
-            quote! {
-                { #block }
-            }
-        }
-    }
-}
-
-fn serialize_internally_tagged_variant(
-    type_ident: &str,
-    variant_ident: &str,
-    generics: &syn::Generics,
-    ty: syn::Ty,
-    variant: &Variant,
-    item_attrs: &attr::Item,
-    tag: &str,
-) -> Tokens {
-    let type_name = item_attrs.name().serialize_name();
-    let variant_name = variant.attrs.name().serialize_name();
-
-    match variant.style {
-        Style::Unit => {
-            quote!({
-                let mut __struct = try!(_serde::Serializer::serialize_struct(
-                    _serializer, #type_name, 1));
-                try!(_serde::ser::SerializeStruct::serialize_field(
-                    &mut __struct, #tag, #variant_name));
-                _serde::ser::SerializeStruct::end(__struct)
-            })
-        }
-        Style::Newtype => {
-            let field = &variant.fields[0];
-            let mut field_expr = quote!(__simple_value);
-            if let Some(path) = field.attrs.serialize_with() {
-                field_expr = wrap_serialize_with(
-                    &ty, generics, field.ty, path, field_expr);
-            }
-
-            quote! {
-                _serde::ser::private::serialize_tagged_newtype(
-                    _serializer,
-                    #type_ident,
-                    #variant_ident,
-                    #tag,
-                    #variant_name,
-                    #field_expr,
-                ),
-            }
-        }
-        Style::Struct => {
-            let block = serialize_struct_variant(
-                StructVariant::InternallyTagged {
-                    tag: tag,
-                    variant_name: variant_name,
-                },
-                generics,
-                ty,
-                &variant.fields,
-                item_attrs,
-            );
-
-            quote! {
-                { #block }
-            }
-        }
-        Style::Tuple => unreachable!("checked in serde_codegen_internals"),
-    }
-}
-
-fn serialize_untagged_variant(
-    generics: &syn::Generics,
-    ty: syn::Ty,
-    variant: &Variant,
-    item_attrs: &attr::Item,
-) -> Tokens {
-    match variant.style {
-        Style::Unit => {
-            quote! {
-                _serde::Serializer::serialize_unit(_serializer),
-            }
-        }
-        Style::Newtype => {
-            let field = &variant.fields[0];
-            let mut field_expr = quote!(__simple_value);
-            if let Some(path) = field.attrs.serialize_with() {
-                field_expr = wrap_serialize_with(
-                    &ty, generics, field.ty, path, field_expr);
-            }
-
-            quote! {
-                _serde::Serialize::serialize(#field_expr, _serializer),
-            }
-        }
-        Style::Tuple => {
-            let block = serialize_tuple_variant(
-                TupleVariant::Untagged,
-                generics,
-                ty,
-                &variant.fields,
-            );
-
-            quote! {
-                { #block }
-            }
-        }
-        Style::Struct => {
-            let block = serialize_struct_variant(
-                StructVariant::Untagged,
-                generics,
-                ty,
-                &variant.fields,
-                item_attrs,
-            );
-
-            quote! {
-                { #block }
-            }
-        }
-    }
-}
-
-enum TupleVariant {
-    ExternallyTagged {
-        type_name: String,
-        variant_index: usize,
-        variant_name: String,
-    },
-    Untagged,
-}
-
-fn serialize_tuple_variant(
-    context: TupleVariant,
-    generics: &syn::Generics,
-    structure_ty: syn::Ty,
-    fields: &[Field],
-) -> Tokens {
-    let method = match context {
-        TupleVariant::ExternallyTagged{..} => {
-            quote!(_serde::ser::SerializeTupleVariant::serialize_field)
-        }
-        TupleVariant::Untagged => {
-            quote!(_serde::ser::SerializeTuple::serialize_element)
-        }
-    };
-
-    let serialize_stmts = serialize_tuple_struct_visitor(
-        structure_ty,
-        fields,
-        generics,
-        true,
-        method,
-    );
-
-    let len = serialize_stmts.len();
-    let let_mut = mut_if(len > 0);
-
-    match context {
-        TupleVariant::ExternallyTagged { type_name, variant_index, variant_name } => {
-            quote! {
-                let #let_mut __serde_state = try!(_serde::Serializer::serialize_tuple_variant(
-                    _serializer,
-                    #type_name,
-                    #variant_index,
-                    #variant_name,
-                    #len));
-                #(#serialize_stmts)*
-                _serde::ser::SerializeTupleVariant::end(__serde_state)
-            }
-        }
-        TupleVariant::Untagged => {
-            quote! {
-                let #let_mut __serde_state = try!(_serde::Serializer::serialize_tuple(
-                    _serializer,
-                    #len));
-                #(#serialize_stmts)*
-                _serde::ser::SerializeTuple::end(__serde_state)
-            }
-        }
-    }
-}
-
-enum StructVariant<'a> {
-    ExternallyTagged {
-        variant_index: usize,
-        variant_name: String,
-    },
-    InternallyTagged {
-        tag: &'a str,
-        variant_name: String,
-    },
-    Untagged,
-}
-
-fn serialize_struct_variant<'a>(
-    context: StructVariant<'a>,
-    generics: &syn::Generics,
-    ty: syn::Ty,
-    fields: &[Field],
-    item_attrs: &attr::Item,
-) -> Tokens {
-    let method = match context {
-        StructVariant::ExternallyTagged{..} => {
-            quote!(_serde::ser::SerializeStructVariant::serialize_field)
-        }
-        StructVariant::InternallyTagged{..} | StructVariant::Untagged => {
-            quote!(_serde::ser::SerializeStruct::serialize_field)
-        }
-    };
-
-    let serialize_fields = serialize_struct_visitor(
-        ty.clone(),
-        fields,
-        generics,
-        true,
-        method,
-    );
-
-    let item_name = item_attrs.name().serialize_name();
-
-    let mut serialized_fields = fields.iter()
-        .filter(|&field| !field.attrs.skip_serializing())
-        .peekable();
-
-    let let_mut = mut_if(serialized_fields.peek().is_some());
-
-    let len = serialized_fields
-        .map(|field| {
-            let ident = field.ident.clone().expect("struct has unnamed fields");
-
-            match field.attrs.skip_serializing_if() {
-                Some(path) => quote!(if #path(#ident) { 0 } else { 1 }),
-                None => quote!(1),
-            }
-         })
-        .fold(quote!(0), |sum, expr| quote!(#sum + #expr));
-
-    match context {
-        StructVariant::ExternallyTagged { variant_index, variant_name } => {
-            quote! {
-                let #let_mut __serde_state = try!(_serde::Serializer::serialize_struct_variant(
-                    _serializer,
-                    #item_name,
-                    #variant_index,
-                    #variant_name,
-                    #len,
-                ));
-                #(#serialize_fields)*
-                _serde::ser::SerializeStructVariant::end(__serde_state)
-            }
-        }
-        StructVariant::InternallyTagged { tag, variant_name } => {
-            quote! {
-                let mut __serde_state = try!(_serde::Serializer::serialize_struct(
-                    _serializer,
-                    #item_name,
-                    #len + 1,
-                ));
-                try!(_serde::ser::SerializeStruct::serialize_field(
-                    &mut __serde_state,
-                    #tag,
-                    #variant_name,
-                ));
-                #(#serialize_fields)*
-                _serde::ser::SerializeStruct::end(__serde_state)
-            }
-        }
-        StructVariant::Untagged => {
-            quote! {
-                let #let_mut __serde_state = try!(_serde::Serializer::serialize_struct(
-                    _serializer,
-                    #item_name,
-                    #len,
-                ));
-                #(#serialize_fields)*
-                _serde::ser::SerializeStruct::end(__serde_state)
-            }
-        }
-    }
-}
-
-fn serialize_tuple_struct_visitor(
-    structure_ty: syn::Ty,
-    fields: &[Field],
-    generics: &syn::Generics,
-    is_enum: bool,
-    func: Tokens,
-) -> Vec<Tokens> {
-    fields.iter()
-        .enumerate()
-        .map(|(i, field)| {
-            let mut field_expr = if is_enum {
-                let id = Ident::new(format!("__field{}", i));
-                quote!(#id)
-            } else {
-                let i = Ident::new(i);
-                quote!(&self.#i)
-            };
-
-            let skip = field.attrs.skip_serializing_if()
-                .map(|path| quote!(#path(#field_expr)));
-
-            if let Some(path) = field.attrs.serialize_with() {
-                field_expr = wrap_serialize_with(
-                    &structure_ty, generics, field.ty, path, field_expr);
-            }
-
-            let ser = quote! {
-                try!(#func(&mut __serde_state, #field_expr));
-            };
-
-            match skip {
-                None => ser,
-                Some(skip) => quote!(if !#skip { #ser }),
-            }
-        })
-        .collect()
-}
-
-fn serialize_struct_visitor(
-    structure_ty: syn::Ty,
-    fields: &[Field],
-    generics: &syn::Generics,
-    is_enum: bool,
-    func: Tokens,
-) -> Vec<Tokens> {
-    fields.iter()
-        .filter(|&field| !field.attrs.skip_serializing())
-        .map(|field| {
-            let ident = field.ident.clone().expect("struct has unnamed field");
-            let mut field_expr = if is_enum {
-                quote!(#ident)
-            } else {
-                quote!(&self.#ident)
-            };
-
-            let key_expr = field.attrs.name().serialize_name();
-
-            let skip = field.attrs.skip_serializing_if()
-                .map(|path| quote!(#path(#field_expr)));
-
-            if let Some(path) = field.attrs.serialize_with() {
-                field_expr = wrap_serialize_with(
-                    &structure_ty, generics, field.ty, path, field_expr)
-            }
-
-            let ser = quote! {
-                try!(#func(&mut __serde_state, #key_expr, #field_expr));
-            };
-
-            match skip {
-                None => ser,
-                Some(skip) => quote!(if !#skip { #ser }),
-            }
-        })
-        .collect()
-}
-
-fn wrap_serialize_with(
-    item_ty: &syn::Ty,
-    generics: &syn::Generics,
-    field_ty: &syn::Ty,
-    path: &syn::Path,
-    value: Tokens,
-) -> Tokens {
-    let where_clause = &generics.where_clause;
-
-    let wrapper_generics = aster::from_generics(generics.clone())
-        .add_lifetime_bound("'__a")
-        .lifetime_name("'__a")
-        .build();
-
-    let wrapper_ty = aster::path()
-        .segment("__SerializeWith")
-            .with_generics(wrapper_generics.clone())
-            .build()
-        .build();
-
-    quote!({
-        struct __SerializeWith #wrapper_generics #where_clause {
-            value: &'__a #field_ty,
-            phantom: _serde::export::PhantomData<#item_ty>,
-        }
-
-        impl #wrapper_generics _serde::Serialize for #wrapper_ty #where_clause {
-            fn serialize<__S>(&self, __s: __S) -> _serde::export::Result<__S::Ok, __S::Error>
-                where __S: _serde::Serializer
-            {
-                #path(self.value, __s)
-            }
-        }
-
-        &__SerializeWith {
-            value: #value,
-            phantom: _serde::export::PhantomData::<#item_ty>,
-        }
-    })
-}
-
-// Serialization of an empty struct results in code like:
-//
-//     let mut __serde_state = try!(serializer.serialize_struct("S", 0));
-//     _serde::ser::SerializeStruct::end(__serde_state)
-//
-// where we want to omit the `mut` to avoid a warning.
-fn mut_if(is_mut: bool) -> Option<Tokens> {
-    if is_mut {
-        Some(quote!(mut))
-    } else {
-        None
-    }
-}

serde_macros/.gitignore

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

serde_macros/Cargo.toml

@@ -0,0 +1,19 @@
+[package]
+name = "serde_macros"
+version = "0.4.2"
+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]
+serde_codegen = { version = "*", path = "../serde_codegen", default-features = false, features = ["nightly"] }
+
+[dev-dependencies]
+num = "*"
+rustc-serialize = "*"
+serde = { version = "*", path = "../serde" }

serde_macros/benches/bench.rs

@@ -0,0 +1,9 @@
+#![feature(custom_attribute, custom_derive, plugin, test)]
+#![plugin(serde_macros)]
+
+extern crate num;
+extern crate rustc_serialize;
+extern crate serde;
+extern crate test;
+
+include!("../../serde_tests/benches/bench.rs.in");

serde_macros/examples/json.rs

@@ -0,0 +1,64 @@
+#![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}
+}

serde_macros/src/lib.rs

@@ -0,0 +1,10 @@
+#![feature(plugin_registrar, rustc_private)]
+
+extern crate serde_codegen;
+extern crate rustc;
+
+#[plugin_registrar]
+#[doc(hidden)]
+pub fn plugin_registrar(reg: &mut rustc::plugin::Registry) {
+    serde_codegen::register(reg);
+}

serde_macros/tests/test.rs

@@ -0,0 +1,7 @@
+#![feature(test, custom_attribute, custom_derive, plugin)]
+#![plugin(serde_macros)]
+
+extern crate serde;
+extern crate test;
+
+include!("../../serde_tests/tests/test.rs.in");

serde_test/Cargo.toml

@@ -1,18 +0,0 @@
-[package]
-name = "serde_test"
-version = "0.9.7"
-authors = ["Erick Tryzelaar <erick.tryzelaar@gmail.com>"]
-license = "MIT/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/"
-readme = "../README.md"
-keywords = ["serde", "serialization"]
-include = ["Cargo.toml", "src/**/*.rs"]
-
-[dependencies]
-serde = { version = "0.9", path = "../serde" }
-
-[badges]
-travis-ci = { repository = "serde-rs/serde" }

serde_test/src/assert.rs

@@ -1,54 +0,0 @@
-use serde::{Serialize, Deserialize};
-
-use de::Deserializer;
-use error::Error;
-use ser::Serializer;
-use token::Token;
-
-use std::fmt::Debug;
-
-pub fn assert_tokens<T>(value: &T, tokens: &[Token<'static>])
-    where T: Serialize + Deserialize + PartialEq + Debug,
-{
-    assert_ser_tokens(value, tokens);
-    assert_de_tokens(value, tokens);
-}
-
-pub fn assert_ser_tokens<T>(value: &T, tokens: &[Token])
-    where T: Serialize,
-{
-    let mut ser = Serializer::new(tokens.iter());
-    assert_eq!(Serialize::serialize(value, &mut ser), Ok(()));
-    assert_eq!(ser.next_token(), None);
-}
-
-/// Expect an error serializing `T`.
-pub fn assert_ser_tokens_error<T>(value: &T, tokens: &[Token], error: Error)
-    where T: Serialize + PartialEq + Debug,
-{
-    let mut ser = Serializer::new(tokens.iter());
-    let v: Result<(), Error> = Serialize::serialize(value, &mut ser);
-    assert_eq!(v.as_ref(), Err(&error));
-    assert_eq!(ser.next_token(), None);
-}
-
-pub fn assert_de_tokens<T>(value: &T, tokens: &[Token<'static>])
-    where T: Deserialize + PartialEq + Debug,
-{
-    let mut de = Deserializer::new(tokens.to_vec().into_iter());
-    let v: Result<T, Error> = Deserialize::deserialize(&mut de);
-    assert_eq!(v.as_ref(), Ok(value));
-    assert_eq!(de.next_token(), None);
-}
-
-/// Expect an error deserializing tokens into a `T`.
-pub fn assert_de_tokens_error<T>(tokens: &[Token<'static>], error: Error)
-    where T: Deserialize + PartialEq + Debug,
-{
-    let mut de = Deserializer::new(tokens.to_vec().into_iter());
-    let v: Result<T, Error> = Deserialize::deserialize(&mut de);
-    assert_eq!(v, Err(error));
-    // There may be one token left if a peek caused the error
-    de.next_token();
-    assert_eq!(de.next_token(), None);
-}

serde_test/src/de.rs

@@ -1,539 +0,0 @@
-use std::iter;
-
-use serde::de::{
-    self,
-    Deserialize,
-    DeserializeSeed,
-    EnumVisitor,
-    MapVisitor,
-    SeqVisitor,
-    VariantVisitor,
-    Visitor,
-};
-use serde::de::value::ValueDeserializer;
-
-use error::Error;
-use token::Token;
-
-pub struct Deserializer<I>
-    where I: Iterator<Item=Token<'static>>,
-{
-    tokens: iter::Peekable<I>,
-}
-
-impl<I> Deserializer<I>
-    where I: Iterator<Item=Token<'static>>,
-{
-    pub fn new(tokens: I) -> Deserializer<I> {
-        Deserializer {
-            tokens: tokens.peekable(),
-        }
-    }
-
-    pub fn next_token(&mut self) -> Option<Token<'static>> {
-        self.tokens.next()
-    }
-
-    pub fn expect_token(&mut self, expected: Token) -> Result<(), Error> {
-        match self.tokens.next() {
-            Some(token) => {
-                if expected == token {
-                    Ok(())
-                } else {
-                    Err(Error::UnexpectedToken(token))
-                }
-            }
-            None => Err(Error::EndOfTokens),
-        }
-    }
-
-    fn visit_seq<V>(&mut self, len: Option<usize>, sep: Token<'static>, end: Token<'static>, visitor: V) -> Result<V::Value, Error>
-        where V: Visitor,
-    {
-        let value = try!(visitor.visit_seq(DeserializerSeqVisitor {
-            de: self,
-            len: len,
-            sep: sep,
-            end: end.clone(),
-        }));
-        try!(self.expect_token(end));
-        Ok(value)
-    }
-
-    fn visit_map<V>(&mut self, len: Option<usize>, sep: Token<'static>, end: Token<'static>, visitor: V) -> Result<V::Value, Error>
-        where V: Visitor,
-    {
-        let value = try!(visitor.visit_map(DeserializerMapVisitor {
-            de: self,
-            len: len,
-            sep: sep,
-            end: end.clone(),
-        }));
-        try!(self.expect_token(end));
-        Ok(value)
-    }
-}
-
-impl<'a, I> de::Deserializer for &'a mut Deserializer<I>
-    where I: Iterator<Item=Token<'static>>,
-{
-    type Error = Error;
-
-    forward_to_deserialize! {
-        bool u8 u16 u32 u64 i8 i16 i32 i64 f32 f64 char str string unit
-        seq bytes byte_buf map struct_field ignored_any
-    }
-
-    fn deserialize<V>(self, visitor: V) -> Result<V::Value, Error>
-        where V: Visitor,
-    {
-        match self.tokens.next() {
-            Some(Token::Bool(v)) => visitor.visit_bool(v),
-            Some(Token::I8(v)) => visitor.visit_i8(v),
-            Some(Token::I16(v)) => visitor.visit_i16(v),
-            Some(Token::I32(v)) => visitor.visit_i32(v),
-            Some(Token::I64(v)) => visitor.visit_i64(v),
-            Some(Token::U8(v)) => visitor.visit_u8(v),
-            Some(Token::U16(v)) => visitor.visit_u16(v),
-            Some(Token::U32(v)) => visitor.visit_u32(v),
-            Some(Token::U64(v)) => visitor.visit_u64(v),
-            Some(Token::F32(v)) => visitor.visit_f32(v),
-            Some(Token::F64(v)) => visitor.visit_f64(v),
-            Some(Token::Char(v)) => visitor.visit_char(v),
-            Some(Token::Str(v)) => visitor.visit_str(v),
-            Some(Token::String(v)) => visitor.visit_string(v),
-            Some(Token::Bytes(v)) => visitor.visit_bytes(v),
-            Some(Token::ByteBuf(v)) => visitor.visit_byte_buf(v),
-            Some(Token::Option(false)) => visitor.visit_none(),
-            Some(Token::Option(true)) => visitor.visit_some(self),
-            Some(Token::Unit) => visitor.visit_unit(),
-            Some(Token::UnitStruct(_name)) => visitor.visit_unit(),
-            Some(Token::SeqStart(len)) => {
-                self.visit_seq(len, Token::SeqSep, Token::SeqEnd, visitor)
-            }
-            Some(Token::SeqArrayStart(len)) => {
-                self.visit_seq(Some(len), Token::SeqSep, Token::SeqEnd, visitor)
-            }
-            Some(Token::TupleStart(len)) => {
-                self.visit_seq(Some(len), Token::TupleSep, Token::TupleEnd, visitor)
-            }
-            Some(Token::TupleStructStart(_, len)) => {
-                self.visit_seq(Some(len), Token::TupleStructSep, Token::TupleStructEnd, visitor)
-            }
-            Some(Token::MapStart(len)) => {
-                self.visit_map(len, Token::MapSep, Token::MapEnd, visitor)
-            }
-            Some(Token::StructStart(_, len)) => {
-                self.visit_map(Some(len), Token::StructSep, Token::StructEnd, visitor)
-            }
-            Some(token) => Err(Error::UnexpectedToken(token)),
-            None => Err(Error::EndOfTokens),
-        }
-    }
-
-    /// Hook into `Option` deserializing so we can treat `Unit` as a
-    /// `None`, or a regular value as `Some(value)`.
-    fn deserialize_option<V>(self, visitor: V) -> Result<V::Value, Error>
-        where V: Visitor,
-    {
-        match self.tokens.peek() {
-            Some(&Token::Unit) | Some(&Token::Option(false)) => {
-                self.tokens.next();
-                visitor.visit_none()
-            }
-            Some(&Token::Option(true)) => {
-                self.tokens.next();
-                visitor.visit_some(self)
-            }
-            Some(_) => visitor.visit_some(self),
-            None => Err(Error::EndOfTokens),
-        }
-    }
-
-    fn deserialize_enum<V>(self,
-                     name: &str,
-                     _variants: &'static [&'static str],
-                     visitor: V) -> Result<V::Value, Error>
-        where V: Visitor,
-    {
-        match self.tokens.peek() {
-            Some(&Token::EnumStart(n)) if name == n => {
-                self.tokens.next();
-
-                visitor.visit_enum(DeserializerEnumVisitor {
-                    de: self,
-                })
-            }
-            Some(&Token::EnumUnit(n, _))
-            | Some(&Token::EnumNewType(n, _))
-            | Some(&Token::EnumSeqStart(n, _, _))
-            | Some(&Token::EnumMapStart(n, _, _)) if name == n => {
-                visitor.visit_enum(DeserializerEnumVisitor {
-                    de: self,
-                })
-            }
-            Some(_) => {
-                let token = self.tokens.next().unwrap();
-                Err(Error::UnexpectedToken(token))
-            }
-            None => Err(Error::EndOfTokens),
-        }
-    }
-
-    fn deserialize_unit_struct<V>(self, name: &str, visitor: V) -> Result<V::Value, Error>
-        where V: Visitor,
-    {
-        match self.tokens.peek() {
-            Some(&Token::UnitStruct(n)) => {
-                self.tokens.next();
-                if name == n {
-                    visitor.visit_unit()
-                } else {
-                    Err(Error::InvalidName(n))
-                }
-            }
-            Some(_) => self.deserialize(visitor),
-            None => Err(Error::EndOfTokens),
-        }
-    }
-
-    fn deserialize_newtype_struct<V>(self,
-                                     name: &str,
-                                     visitor: V) -> Result<V::Value, Error>
-        where V: Visitor,
-    {
-        match self.tokens.peek() {
-            Some(&Token::StructNewType(n)) => {
-                self.tokens.next();
-                if name == n {
-                    visitor.visit_newtype_struct(self)
-                } else {
-                    Err(Error::InvalidName(n))
-                }
-            }
-            Some(_) => self.deserialize(visitor),
-            None => Err(Error::EndOfTokens),
-        }
-    }
-
-    fn deserialize_seq_fixed_size<V>(self,
-                                       len: usize,
-                                       visitor: V) -> Result<V::Value, Error>
-        where V: Visitor,
-    {
-        match self.tokens.peek() {
-            Some(&Token::SeqArrayStart(_)) => {
-                self.tokens.next();
-                self.visit_seq(Some(len), Token::SeqSep, Token::SeqEnd, visitor)
-            }
-            Some(_) => self.deserialize(visitor),
-            None => Err(Error::EndOfTokens),
-        }
-    }
-
-    fn deserialize_tuple<V>(self,
-                            len: usize,
-                            visitor: V) -> Result<V::Value, Error>
-        where V: Visitor,
-    {
-        match self.tokens.peek() {
-            Some(&Token::Unit) | Some(&Token::UnitStruct(_)) => {
-                self.tokens.next();
-                visitor.visit_unit()
-            }
-            Some(&Token::SeqStart(_)) => {
-                self.tokens.next();
-                self.visit_seq(Some(len), Token::SeqSep, Token::SeqEnd, visitor)
-            }
-            Some(&Token::SeqArrayStart(_)) => {
-                self.tokens.next();
-                self.visit_seq(Some(len), Token::SeqSep, Token::SeqEnd, visitor)
-            }
-            Some(&Token::TupleStart(_)) => {
-                self.tokens.next();
-                self.visit_seq(Some(len), Token::TupleSep, Token::TupleEnd, visitor)
-            }
-            Some(&Token::TupleStructStart(_, _)) => {
-                self.tokens.next();
-                self.visit_seq(Some(len), Token::TupleStructSep, Token::TupleStructEnd, visitor)
-            }
-            Some(_) => self.deserialize(visitor),
-            None => Err(Error::EndOfTokens),
-        }
-    }
-
-    fn deserialize_tuple_struct<V>(self,
-                                   name: &str,
-                                   len: usize,
-                                   visitor: V) -> Result<V::Value, Error>
-        where V: Visitor,
-    {
-        match self.tokens.peek() {
-            Some(&Token::Unit) => {
-                self.tokens.next();
-                visitor.visit_unit()
-            }
-            Some(&Token::UnitStruct(n)) => {
-                self.tokens.next();
-                if name == n {
-                    visitor.visit_unit()
-                } else {
-                    Err(Error::InvalidName(n))
-                }
-            }
-            Some(&Token::SeqStart(_)) => {
-                self.tokens.next();
-                self.visit_seq(Some(len), Token::SeqSep, Token::SeqEnd, visitor)
-            }
-            Some(&Token::SeqArrayStart(_)) => {
-                self.tokens.next();
-                self.visit_seq(Some(len), Token::SeqSep, Token::SeqEnd, visitor)
-            }
-            Some(&Token::TupleStart(_)) => {
-                self.tokens.next();
-                self.visit_seq(Some(len), Token::TupleSep, Token::TupleEnd, visitor)
-            }
-            Some(&Token::TupleStructStart(n, _)) => {
-                self.tokens.next();
-                if name == n {
-                    self.visit_seq(Some(len), Token::TupleStructSep, Token::TupleStructEnd, visitor)
-                } else {
-                    Err(Error::InvalidName(n))
-                }
-            }
-            Some(_) => self.deserialize(visitor),
-            None => Err(Error::EndOfTokens),
-        }
-    }
-
-    fn deserialize_struct<V>(self,
-                             name: &str,
-                             fields: &'static [&'static str],
-                             visitor: V) -> Result<V::Value, Error>
-        where V: Visitor,
-    {
-        match self.tokens.peek() {
-            Some(&Token::StructStart(n, _)) => {
-                self.tokens.next();
-                if name == n {
-                    self.visit_map(Some(fields.len()), Token::StructSep, Token::StructEnd, visitor)
-                } else {
-                    Err(Error::InvalidName(n))
-                }
-            }
-            Some(&Token::MapStart(_)) => {
-                self.tokens.next();
-                self.visit_map(Some(fields.len()), Token::MapSep, Token::MapEnd, visitor)
-            }
-            Some(_) => self.deserialize(visitor),
-            None => Err(Error::EndOfTokens),
-        }
-    }
-}
-
-//////////////////////////////////////////////////////////////////////////
-
-struct DeserializerSeqVisitor<'a, I: 'a> where I: Iterator<Item=Token<'static>> {
-    de: &'a mut Deserializer<I>,
-    len: Option<usize>,
-    sep: Token<'static>,
-    end: Token<'static>,
-}
-
-impl<'a, I> SeqVisitor for DeserializerSeqVisitor<'a, I>
-    where I: Iterator<Item=Token<'static>>,
-{
-    type Error = Error;
-
-    fn visit_seed<T>(&mut self, seed: T) -> Result<Option<T::Value>, Error>
-        where T: DeserializeSeed,
-    {
-        if self.de.tokens.peek() == Some(&self.end) {
-            return Ok(None);
-        }
-        match self.de.tokens.next() {
-            Some(ref token) if *token == self.sep => {
-                self.len = self.len.map(|len| len.saturating_sub(1));
-                seed.deserialize(&mut *self.de).map(Some)
-            }
-            Some(other) => Err(Error::UnexpectedToken(other)),
-            None => Err(Error::EndOfTokens),
-        }
-    }
-
-    fn size_hint(&self) -> (usize, Option<usize>) {
-        let len = self.len.unwrap_or(0);
-        (len, self.len)
-    }
-}
-
-//////////////////////////////////////////////////////////////////////////
-
-struct DeserializerMapVisitor<'a, I: 'a> where I: Iterator<Item=Token<'static>> {
-    de: &'a mut Deserializer<I>,
-    len: Option<usize>,
-    sep: Token<'static>,
-    end: Token<'static>,
-}
-
-impl<'a, I> MapVisitor for DeserializerMapVisitor<'a, I>
-    where I: Iterator<Item=Token<'static>>,
-{
-    type Error = Error;
-
-    fn visit_key_seed<K>(&mut self, seed: K) -> Result<Option<K::Value>, Error>
-        where K: DeserializeSeed,
-    {
-        if self.de.tokens.peek() == Some(&self.end) {
-            return Ok(None);
-        }
-        match self.de.tokens.next() {
-            Some(ref token) if *token == self.sep => {
-                self.len = self.len.map(|len| len.saturating_sub(1));
-                seed.deserialize(&mut *self.de).map(Some)
-            }
-            Some(other) => Err(Error::UnexpectedToken(other)),
-            None => Err(Error::EndOfTokens),
-        }
-    }
-
-    fn visit_value_seed<V>(&mut self, seed: V) -> Result<V::Value, Error>
-        where V: DeserializeSeed,
-    {
-        seed.deserialize(&mut *self.de)
-    }
-
-    fn size_hint(&self) -> (usize, Option<usize>) {
-        let len = self.len.unwrap_or(0);
-        (len, self.len)
-    }
-}
-
-//////////////////////////////////////////////////////////////////////////
-
-struct DeserializerEnumVisitor<'a, I: 'a> where I: Iterator<Item=Token<'static>> {
-    de: &'a mut Deserializer<I>,
-}
-
-impl<'a, I> EnumVisitor for DeserializerEnumVisitor<'a, I>
-    where I: Iterator<Item=Token<'static>>,
-{
-    type Error = Error;
-    type Variant = Self;
-
-    fn visit_variant_seed<V>(self, seed: V) -> Result<(V::Value, Self), Error>
-        where V: DeserializeSeed,
-    {
-        match self.de.tokens.peek() {
-            Some(&Token::EnumUnit(_, v))
-            | Some(&Token::EnumNewType(_, v))
-            | Some(&Token::EnumSeqStart(_, v, _))
-            | Some(&Token::EnumMapStart(_, v, _)) => {
-                let de = v.into_deserializer();
-                let value = try!(seed.deserialize(de));
-                Ok((value, self))
-            }
-            Some(_) => {
-                let value = try!(seed.deserialize(&mut *self.de));
-                Ok((value, self))
-            }
-            None => Err(Error::EndOfTokens),
-        }
-    }
-}
-
-impl<'a, I> VariantVisitor for DeserializerEnumVisitor<'a, I>
-    where I: Iterator<Item=Token<'static>>
-{
-    type Error = Error;
-
-    fn visit_unit(self) -> Result<(), Error> {
-        match self.de.tokens.peek() {
-            Some(&Token::EnumUnit(_, _)) => {
-                self.de.tokens.next();
-                Ok(())
-            }
-            Some(_) => {
-                Deserialize::deserialize(self.de)
-            }
-            None => Err(Error::EndOfTokens),
-        }
-    }
-
-    fn visit_newtype_seed<T>(self, seed: T) -> Result<T::Value, Self::Error>
-        where T: DeserializeSeed,
-    {
-        match self.de.tokens.peek() {
-            Some(&Token::EnumNewType(_, _)) => {
-                self.de.tokens.next();
-                seed.deserialize(self.de)
-            }
-            Some(_) => {
-                seed.deserialize(self.de)
-            }
-            None => Err(Error::EndOfTokens),
-        }
-    }
-
-    fn visit_tuple<V>(self,
-                      len: usize,
-                      visitor: V) -> Result<V::Value, Error>
-        where V: Visitor,
-    {
-        match self.de.tokens.peek() {
-            Some(&Token::EnumSeqStart(_, _, enum_len)) => {
-                let token = self.de.tokens.next().unwrap();
-
-                if len == enum_len {
-                    self.de.visit_seq(Some(len), Token::EnumSeqSep, Token::EnumSeqEnd, visitor)
-                } else {
-                    Err(Error::UnexpectedToken(token))
-                }
-            }
-            Some(&Token::SeqStart(Some(enum_len))) => {
-                let token = self.de.tokens.next().unwrap();
-
-                if len == enum_len {
-                    self.de.visit_seq(Some(len), Token::SeqSep, Token::SeqEnd, visitor)
-                } else {
-                    Err(Error::UnexpectedToken(token))
-                }
-            }
-            Some(_) => {
-                de::Deserializer::deserialize(self.de, visitor)
-            }
-            None => Err(Error::EndOfTokens),
-        }
-    }
-
-    fn visit_struct<V>(self,
-                       fields: &'static [&'static str],
-                       visitor: V) -> Result<V::Value, Error>
-        where V: Visitor,
-    {
-        match self.de.tokens.peek() {
-            Some(&Token::EnumMapStart(_, _, enum_len)) => {
-                let token = self.de.tokens.next().unwrap();
-
-                if fields.len() == enum_len {
-                    self.de.visit_map(Some(fields.len()), Token::EnumMapSep, Token::EnumMapEnd, visitor)
-                } else {
-                    Err(Error::UnexpectedToken(token))
-                }
-            }
-            Some(&Token::MapStart(Some(enum_len))) => {
-                let token = self.de.tokens.next().unwrap();
-
-                if fields.len() == enum_len {
-                    self.de.visit_map(Some(fields.len()), Token::MapSep, Token::MapEnd, visitor)
-                } else {
-                    Err(Error::UnexpectedToken(token))
-                }
-            }
-            Some(_) => {
-                de::Deserializer::deserialize(self.de, visitor)
-            }
-            None => Err(Error::EndOfTokens),
-        }
-    }
-}

serde_test/src/error.rs

@@ -1,48 +0,0 @@
-use std::error;
-use std::fmt::{self, Display};
-
-use serde::{ser, de};
-
-use token::Token;
-
-#[derive(Clone, PartialEq, Debug)]
-pub enum Error {
-    Message(String),
-    InvalidName(&'static str),
-    UnexpectedToken(Token<'static>),
-    EndOfTokens,
-}
-
-impl ser::Error for Error {
-    fn custom<T: Display>(msg: T) -> Error {
-        Error::Message(msg.to_string())
-    }
-}
-
-impl de::Error for Error {
-    fn custom<T: Display>(msg: T) -> Error {
-        Error::Message(msg.to_string())
-    }
-}
-
-impl fmt::Display for Error {
-    fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
-        match *self {
-            Error::Message(ref msg) => formatter.write_str(msg),
-            Error::InvalidName(name) => write!(formatter, "invalid name `{}`", name),
-            Error::UnexpectedToken(_) => formatter.write_str("unexpected token"),
-            Error::EndOfTokens => formatter.write_str("end of tokens"),
-        }
-    }
-}
-
-impl error::Error for Error {
-    fn description(&self) -> &str {
-        match *self {
-            Error::Message(ref msg) => msg,
-            Error::InvalidName(_) => "invalid name",
-            Error::UnexpectedToken(_) => "unexpected token",
-            Error::EndOfTokens => "end of tokens",
-        }
-    }
-}

serde_test/src/lib.rs

@@ -1,23 +0,0 @@
-#[macro_use]
-extern crate serde;
-
-mod assert;
-pub use assert::{
-    assert_tokens,
-    assert_ser_tokens,
-    assert_ser_tokens_error,
-    assert_de_tokens,
-    assert_de_tokens_error,
-};
-
-mod ser;
-pub use ser::Serializer;
-
-mod de;
-pub use de::Deserializer;
-
-mod token;
-pub use token::Token;
-
-mod error;
-pub use error::Error;

serde_test/src/ser.rs

@@ -1,346 +0,0 @@
-use std::marker::PhantomData;
-
-use serde::{ser, Serialize};
-
-use error::Error;
-use token::Token;
-
-pub struct Serializer<'a, I>
-    where I: Iterator<Item=&'a Token<'a>>,
-{
-    tokens: I,
-    phantom: PhantomData<&'a Token<'a>>,
-}
-
-impl<'a, I> Serializer<'a, I>
-    where I: Iterator<Item=&'a Token<'a>>,
-{
-    pub fn new(tokens: I) -> Serializer<'a, I> {
-        Serializer {
-            tokens: tokens,
-            phantom: PhantomData,
-        }
-    }
-
-    pub fn next_token(&mut self) -> Option<&'a Token<'a>> {
-        self.tokens.next()
-    }
-}
-
-impl<'s, 'a, I> ser::Serializer for &'s mut Serializer<'a, I>
-    where I: Iterator<Item=&'a Token<'a>>,
-{
-    type Ok = ();
-    type Error = Error;
-
-    type SerializeSeq = Self;
-    type SerializeTuple = Self;
-    type SerializeTupleStruct = Self;
-    type SerializeTupleVariant = Self;
-    type SerializeMap = Self;
-    type SerializeStruct = Self;
-    type SerializeStructVariant = Self;
-
-    fn serialize_bool(self, v: bool) -> Result<(), Error> {
-        assert_eq!(self.tokens.next(), Some(&Token::Bool(v)));
-        Ok(())
-    }
-
-    fn serialize_i8(self, v: i8) -> Result<(), Error> {
-        assert_eq!(self.tokens.next(), Some(&Token::I8(v)));
-        Ok(())
-    }
-
-    fn serialize_i16(self, v: i16) -> Result<(), Error> {
-        assert_eq!(self.tokens.next(), Some(&Token::I16(v)));
-        Ok(())
-    }
-
-    fn serialize_i32(self, v: i32) -> Result<(), Error> {
-        assert_eq!(self.tokens.next(), Some(&Token::I32(v)));
-        Ok(())
-    }
-
-    fn serialize_i64(self, v: i64) -> Result<(), Error> {
-        assert_eq!(self.tokens.next(), Some(&Token::I64(v)));
-        Ok(())
-    }
-
-    fn serialize_u8(self, v: u8) -> Result<(), Error> {
-        assert_eq!(self.tokens.next(), Some(&Token::U8(v)));
-        Ok(())
-    }
-
-    fn serialize_u16(self, v: u16) -> Result<(), Error> {
-        assert_eq!(self.tokens.next(), Some(&Token::U16(v)));
-        Ok(())
-    }
-
-    fn serialize_u32(self, v: u32) -> Result<(), Error> {
-        assert_eq!(self.tokens.next(), Some(&Token::U32(v)));
-        Ok(())
-    }
-
-    fn serialize_u64(self, v: u64) -> Result<(), Error> {
-        assert_eq!(self.tokens.next(), Some(&Token::U64(v)));
-        Ok(())
-    }
-
-    fn serialize_f32(self, v: f32) -> Result<(), Error> {
-        assert_eq!(self.tokens.next(), Some(&Token::F32(v)));
-        Ok(())
-    }
-
-    fn serialize_f64(self, v: f64) -> Result<(), Error> {
-        assert_eq!(self.tokens.next(), Some(&Token::F64(v)));
-        Ok(())
-    }
-
-    fn serialize_char(self, v: char) -> Result<(), Error> {
-        assert_eq!(self.tokens.next(), Some(&Token::Char(v)));
-        Ok(())
-    }
-
-    fn serialize_str(self, v: &str) -> Result<(), Error> {
-        assert_eq!(self.tokens.next(), Some(&Token::Str(v)));
-        Ok(())
-    }
-
-    fn serialize_bytes(self, value: &[u8]) -> Result<(), Self::Error> {
-        assert_eq!(self.tokens.next(), Some(&Token::Bytes(value)));
-        Ok(())
-    }
-
-    fn serialize_unit(self) -> Result<(), Error> {
-        assert_eq!(self.tokens.next(), Some(&Token::Unit));
-        Ok(())
-    }
-
-    fn serialize_unit_struct(self, name: &str) -> Result<(), Error> {
-        assert_eq!(self.tokens.next(), Some(&Token::UnitStruct(name)));
-        Ok(())
-    }
-
-    fn serialize_unit_variant(self,
-                              name: &str,
-                              _variant_index: usize,
-                              variant: &str) -> Result<(), Error> {
-        assert_eq!(self.tokens.next(), Some(&Token::EnumUnit(name, variant)));
-        Ok(())
-    }
-
-    fn serialize_newtype_struct<T: ?Sized>(self,
-                                           name: &'static str,
-                                           value: &T) -> Result<(), Error>
-        where T: Serialize,
-    {
-        assert_eq!(self.tokens.next(), Some(&Token::StructNewType(name)));
-        value.serialize(self)
-    }
-
-    fn serialize_newtype_variant<T: ?Sized>(self,
-                                            name: &str,
-                                            _variant_index: usize,
-                                            variant: &str,
-                                            value: &T) -> Result<(), Error>
-        where T: Serialize,
-    {
-        assert_eq!(self.tokens.next(), Some(&Token::EnumNewType(name, variant)));
-        value.serialize(self)
-    }
-
-    fn serialize_none(self) -> Result<(), Error> {
-        assert_eq!(self.tokens.next(), Some(&Token::Option(false)));
-        Ok(())
-    }
-
-    fn serialize_some<T: ?Sized>(self, value: &T) -> Result<(), Error>
-        where T: Serialize,
-    {
-        assert_eq!(self.tokens.next(), Some(&Token::Option(true)));
-        value.serialize(self)
-    }
-
-    fn serialize_seq(self, len: Option<usize>) -> Result<Self, Error> {
-        assert_eq!(self.tokens.next(), Some(&Token::SeqStart(len)));
-        Ok(self)
-    }
-
-    fn serialize_seq_fixed_size(self, len: usize) -> Result<Self, Error> {
-        assert_eq!(self.tokens.next(), Some(&Token::SeqArrayStart(len)));
-        Ok(self)
-    }
-
-    fn serialize_tuple(self, len: usize) -> Result<Self, Error> {
-        assert_eq!(self.tokens.next(), Some(&Token::TupleStart(len)));
-        Ok(self)
-    }
-
-    fn serialize_tuple_struct(self, name: &'static str, len: usize) -> Result<Self, Error> {
-        assert_eq!(self.tokens.next(), Some(&Token::TupleStructStart(name, len)));
-        Ok(self)
-    }
-
-    fn serialize_tuple_variant(self,
-                               name: &str,
-                               _variant_index: usize,
-                               variant: &str,
-                               len: usize) -> Result<Self, Error>
-    {
-        assert_eq!(self.tokens.next(), Some(&Token::EnumSeqStart(name, variant, len)));
-        Ok(self)
-    }
-
-    fn serialize_map(self, len: Option<usize>) -> Result<Self, Error> {
-        assert_eq!(self.tokens.next(), Some(&Token::MapStart(len)));
-        Ok(self)
-    }
-
-    fn serialize_struct(self, name: &str, len: usize) -> Result<Self, Error> {
-        assert_eq!(self.tokens.next(), Some(&Token::StructStart(name, len)));
-        Ok(self)
-    }
-
-    fn serialize_struct_variant(self,
-                                name: &str,
-                                _variant_index: usize,
-                                variant: &str,
-                                len: usize) -> Result<Self, Error>
-    {
-        assert_eq!(self.tokens.next(), Some(&Token::EnumMapStart(name, variant, len)));
-        Ok(self)
-    }
-}
-
-impl<'s, 'a, I> ser::SerializeSeq for &'s mut Serializer<'a, I>
-    where I: Iterator<Item=&'a Token<'a>>,
-{
-    type Ok = ();
-    type Error = Error;
-
-    fn serialize_element<T: ?Sized>(&mut self, value: &T) -> Result<(), Error>
-        where T: Serialize
-    {
-        assert_eq!(self.tokens.next(), Some(&Token::SeqSep));
-        value.serialize(&mut **self)
-    }
-
-    fn end(self) -> Result<(), Error> {
-        assert_eq!(self.tokens.next(), Some(&Token::SeqEnd));
-        Ok(())
-    }
-}
-
-impl<'s, 'a, I> ser::SerializeTuple for &'s mut Serializer<'a, I>
-    where I: Iterator<Item=&'a Token<'a>>,
-{
-    type Ok = ();
-    type Error = Error;
-
-    fn serialize_element<T: ?Sized>(&mut self, value: &T) -> Result<(), Error>
-        where T: Serialize
-    {
-        assert_eq!(self.tokens.next(), Some(&Token::TupleSep));
-        value.serialize(&mut **self)
-    }
-
-    fn end(self) -> Result<(), Error> {
-        assert_eq!(self.tokens.next(), Some(&Token::TupleEnd));
-        Ok(())
-    }
-}
-
-impl<'s, 'a, I> ser::SerializeTupleStruct for &'s mut Serializer<'a, I>
-    where I: Iterator<Item=&'a Token<'a>>,
-{
-    type Ok = ();
-    type Error = Error;
-
-    fn serialize_field<T: ?Sized>(&mut self, value: &T) -> Result<(), Error>
-        where T: Serialize
-    {
-        assert_eq!(self.tokens.next(), Some(&Token::TupleStructSep));
-        value.serialize(&mut **self)
-    }
-
-    fn end(self) -> Result<(), Error> {
-        assert_eq!(self.tokens.next(), Some(&Token::TupleStructEnd));
-        Ok(())
-    }
-}
-
-impl<'s, 'a, I> ser::SerializeTupleVariant for &'s mut Serializer<'a, I>
-    where I: Iterator<Item=&'a Token<'a>>,
-{
-    type Ok = ();
-    type Error = Error;
-
-    fn serialize_field<T: ?Sized>(&mut self, value: &T) -> Result<(), Error>
-        where T: Serialize
-    {
-        assert_eq!(self.tokens.next(), Some(&Token::EnumSeqSep));
-        value.serialize(&mut **self)
-    }
-
-    fn end(self) -> Result<(), Error> {
-        assert_eq!(self.tokens.next(), Some(&Token::EnumSeqEnd));
-        Ok(())
-    }
-}
-
-impl<'s, 'a, I> ser::SerializeMap for &'s mut Serializer<'a, I>
-    where I: Iterator<Item=&'a Token<'a>>,
-{
-    type Ok = ();
-    type Error = Error;
-
-    fn serialize_key<T: ?Sized>(&mut self, key: &T) -> Result<(), Self::Error> where T: Serialize {
-        assert_eq!(self.tokens.next(), Some(&Token::MapSep));
-        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_eq!(self.tokens.next(), Some(&Token::MapEnd));
-        Ok(())
-    }
-}
-
-impl<'s, 'a, I> ser::SerializeStruct for &'s mut Serializer<'a, I>
-    where I: Iterator<Item=&'a Token<'a>>,
-{
-    type Ok = ();
-    type Error = Error;
-
-    fn serialize_field<T: ?Sized>(&mut self, key: &'static str, value: &T) -> Result<(), Self::Error> where T: Serialize {
-        assert_eq!(self.tokens.next(), Some(&Token::StructSep));
-        try!(key.serialize(&mut **self));
-        value.serialize(&mut **self)
-    }
-
-    fn end(self) -> Result<(), Self::Error> {
-        assert_eq!(self.tokens.next(), Some(&Token::StructEnd));
-        Ok(())
-    }
-}
-
-impl<'s, 'a, I> ser::SerializeStructVariant for &'s mut Serializer<'a, I>
-    where I: Iterator<Item=&'a Token<'a>>,
-{
-    type Ok = ();
-    type Error = Error;
-
-    fn serialize_field<T: ?Sized>(&mut self, key: &'static str, value: &T) -> Result<(), Self::Error> where T: Serialize {
-        assert_eq!(self.tokens.next(), Some(&Token::EnumMapSep));
-        try!(key.serialize(&mut **self));
-        value.serialize(&mut **self)
-    }
-
-    fn end(self) -> Result<(), Self::Error> {
-        assert_eq!(self.tokens.next(), Some(&Token::EnumMapEnd));
-        Ok(())
-    }
-}

serde_test/src/token.rs

@@ -1,59 +0,0 @@
-#[derive(Clone, PartialEq, Debug)]
-pub enum Token<'a> {
-    Bool(bool),
-    I8(i8),
-    I16(i16),
-    I32(i32),
-    I64(i64),
-    U8(u8),
-    U16(u16),
-    U32(u32),
-    U64(u64),
-    F32(f32),
-    F64(f64),
-    Char(char),
-    Str(&'a str),
-    String(String),
-    Bytes(&'a [u8]),
-    ByteBuf(Vec<u8>),
-
-    Option(bool),
-
-    Unit,
-    UnitStruct(&'a str),
-
-    StructNewType(&'a str),
-
-    EnumStart(&'a str),
-    EnumUnit(&'a str, &'a str),
-    EnumNewType(&'a str, &'a str),
-
-    SeqStart(Option<usize>),
-    SeqArrayStart(usize),
-    SeqSep,
-    SeqEnd,
-
-    TupleStart(usize),
-    TupleSep,
-    TupleEnd,
-
-    TupleStructStart(&'a str, usize),
-    TupleStructSep,
-    TupleStructEnd,
-
-    MapStart(Option<usize>),
-    MapSep,
-    MapEnd,
-
-    StructStart(&'a str, usize),
-    StructSep,
-    StructEnd,
-
-    EnumSeqStart(&'a str, &'a str, usize),
-    EnumSeqSep,
-    EnumSeqEnd,
-
-    EnumMapStart(&'a str, &'a str, usize),
-    EnumMapSep,
-    EnumMapEnd,
-}

serde_tests/Cargo.toml

@@ -0,0 +1,30 @@
+[package]
+name = "serde_tests"
+version = "0.4.1"
+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"]
+build = "build.rs"
+
+[build-dependencies]
+syntex = { version = "*", optional = true }
+syntex_syntax = { version = "*" }
+serde_codegen = { version = "*", path = "../serde_codegen", features = ["with-syntex"] }
+
+[dev-dependencies]
+num = "*"
+rustc-serialize = "*"
+serde = { version = "*", path = "../serde" }
+syntex = "*"
+
+[[test]]
+name = "test"
+path = "tests/test.rs"
+
+[[bench]]
+name = "bench"
+path = "benches/bench.rs"

serde_tests/benches/bench.rs

@@ -0,0 +1,8 @@
+#![feature(test)]
+
+extern crate num;
+extern crate rustc_serialize;
+extern crate serde;
+extern crate test;
+
+include!(concat!(env!("OUT_DIR"), "/bench.rs"));

serde_tests/benches/bench.rs.in

@@ -0,0 +1,5 @@
+mod bench_enum;
+mod bench_log;
+mod bench_map;
+mod bench_struct;
+mod bench_vec;

serde_tests/benches/bench_enum.rs

@@ -0,0 +1,444 @@
+use test::Bencher;
+use rustc_serialize::{Decoder, Decodable};
+use serde;
+use serde::de::{Deserializer, Deserialize};
+
+//////////////////////////////////////////////////////////////////////////////
+
+#[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 = 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 = 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 = 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 = 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);
+    })
+}

serde_tests/benches/bench_map.rs

@@ -0,0 +1,458 @@
+use std::fmt::Debug;
+use std::collections::HashMap;
+use test::Bencher;
+
+use rustc_serialize::{Decoder, Decodable};
+
+use serde;
+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)
+    })
+}

serde_tests/benches/bench_struct.rs

@@ -0,0 +1,737 @@
+use std::collections::HashMap;
+use test::Bencher;
+
+use rustc_serialize::{Decoder, Decodable};
+
+use serde;
+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,
+    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));
+    })
+}

serde_tests/benches/bench_vec.rs

@@ -0,0 +1,611 @@
+use std::fmt::Debug;
+use test::Bencher;
+
+use rustc_serialize::{Decoder, Decodable};
+
+use serde;
+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)
+    })
+}

serde_tests/build.rs

@@ -0,0 +1,22 @@
+extern crate syntex;
+extern crate serde_codegen;
+
+use std::env;
+use std::path::Path;
+
+fn main() {
+    let out_dir = env::var_os("OUT_DIR").unwrap();
+
+    for &(src, dst) in &[
+        ("tests/test.rs.in", "test.rs"),
+        ("benches/bench.rs.in", "bench.rs"),
+    ] {
+        let src = Path::new(src);
+        let dst = Path::new(&out_dir).join(dst);
+
+        let mut registry = syntex::Registry::new();
+
+        serde_codegen::register(&mut registry);
+        registry.expand("", &src, &dst).unwrap();
+    }
+}

serde_tests/tests/test.rs

@@ -0,0 +1,3 @@
+extern crate serde;
+
+include!(concat!(env!("OUT_DIR"), "/test.rs"));

serde_tests/tests/test.rs.in

@@ -0,0 +1,11 @@
+/*
+mod test_annotations;
+mod test_bytes;
+mod test_de;
+mod test_json;
+mod test_json_builder;
+*/
+mod test_macros;
+/*
+mod test_ser;
+*/

serde_tests/tests/test_annotations.rs

@@ -0,0 +1,73 @@
+use serde::json;
+
+#[derive(Debug, PartialEq, Serialize, Deserialize)]
+struct Default {
+    a1: i32,
+    #[serde(default)]
+    a2: i32,
+}
+
+#[derive(Debug, PartialEq, Serialize, Deserialize)]
+struct Rename {
+    a1: i32,
+    #[serde(rename="a3")]
+    a2: i32,
+}
+
+#[derive(Debug, PartialEq, Serialize, Deserialize)]
+struct FormatRename {
+    a1: i32,
+    #[serde(rename(xml= "a4", json="a5"))]
+    a2: i32,
+}
+
+#[derive(Debug, PartialEq, Deserialize, Serialize)]
+enum SerEnum<A> {
+    Map {
+        a: i8,
+        #[serde(rename(xml= "c", json="d"))]
+        b: A,
+    },
+}
+
+
+#[test]
+fn test_default() {
+    let deserialized_value: Default = json::from_str(&"{\"a1\":1,\"a2\":2}").unwrap();
+    assert_eq!(deserialized_value, Default { a1: 1, a2: 2 });
+
+    let deserialized_value: Default = json::from_str(&"{\"a1\":1}").unwrap();
+    assert_eq!(deserialized_value, Default { a1: 1, a2: 0 });
+}
+
+#[test]
+fn test_rename() {
+    let value = Rename { a1: 1, a2: 2 };
+    let serialized_value = json::to_string(&value).unwrap();
+    assert_eq!(serialized_value, "{\"a1\":1,\"a3\":2}");
+
+    let deserialized_value: Rename = json::from_str(&serialized_value).unwrap();
+    assert_eq!(value, deserialized_value);
+}
+
+#[test]
+fn test_format_rename() {
+    let value = FormatRename { a1: 1, a2: 2 };
+    let serialized_value = json::to_string(&value).unwrap();
+    assert_eq!(serialized_value, "{\"a1\":1,\"a5\":2}");
+
+    let deserialized_value = json::from_str("{\"a1\":1,\"a5\":2}").unwrap();
+    assert_eq!(value, deserialized_value);
+}
+
+#[test]
+fn test_enum_format_rename() {
+    let s1 = String::new();
+    let value = SerEnum::Map { a: 0i8, b: s1 };
+    let serialized_value = json::to_string(&value).unwrap();
+    let ans = "{\"Map\":{\"a\":0,\"d\":\"\"}}";
+    assert_eq!(serialized_value, ans);
+
+    let deserialized_value = json::from_str(ans).unwrap();
+    assert_eq!(value, deserialized_value);
+}

serde_tests/tests/test_bytes.rs

@@ -0,0 +1,209 @@
+use serde;
+use serde::Serialize;
+use serde::bytes::{ByteBuf, Bytes};
+use serde::json;
+
+///////////////////////////////////////////////////////////////////////////////
+
+#[derive(Debug, PartialEq)]
+struct Error;
+
+impl serde::de::Error for Error {
+    fn syntax_error() -> Error { Error }
+
+    fn end_of_stream_error() -> Error { Error }
+
+    fn unknown_field_error(_field: &str) -> Error { Error }
+
+    fn missing_field_error(_field: &'static str) -> Error { Error }
+}
+
+///////////////////////////////////////////////////////////////////////////////
+
+struct BytesSerializer {
+    bytes: Vec<u8>,
+}
+
+impl BytesSerializer {
+    fn new(bytes: Vec<u8>) -> Self {
+        BytesSerializer {
+            bytes: bytes,
+        }
+    }
+}
+
+impl serde::Serializer for BytesSerializer {
+    type Error = Error;
+
+    fn visit_unit(&mut self) -> Result<(), Error> {
+        Err(Error)
+    }
+
+    fn visit_bool(&mut self, _v: bool) -> Result<(), Error> {
+        Err(Error)
+    }
+
+    fn visit_i64(&mut self, _v: i64) -> Result<(), Error> {
+        Err(Error)
+    }
+
+    fn visit_u64(&mut self, _v: u64) -> Result<(), Error> {
+        Err(Error)
+    }
+
+    fn visit_f32(&mut self, _v: f32) -> Result<(), Error> {
+        Err(Error)
+    }
+
+    fn visit_f64(&mut self, _v: f64) -> Result<(), Error> {
+        Err(Error)
+    }
+
+    fn visit_char(&mut self, _v: char) -> Result<(), Error> {
+        Err(Error)
+    }
+
+    fn visit_str(&mut self, _v: &str) -> Result<(), Error> {
+        Err(Error)
+    }
+
+    fn visit_none(&mut self) -> Result<(), Error> {
+        Err(Error)
+    }
+
+    fn visit_some<V>(&mut self, _value: V) -> Result<(), Error>
+        where V: serde::Serialize,
+    {
+        Err(Error)
+    }
+
+    fn visit_seq<V>(&mut self, _visitor: V) -> Result<(), Error>
+        where V: serde::ser::SeqVisitor,
+    {
+        Err(Error)
+    }
+
+    fn visit_seq_elt<T>(&mut self, _value: T) -> Result<(), Error>
+        where T: serde::Serialize
+    {
+        Err(Error)
+    }
+
+    fn visit_map<V>(&mut self, _visitor: V) -> Result<(), Error>
+        where V: serde::ser::MapVisitor,
+    {
+        Err(Error)
+    }
+
+    fn visit_map_elt<K, V>(&mut self, _key: K, _value: V) -> Result<(), Error>
+        where K: serde::Serialize,
+              V: serde::Serialize,
+    {
+        Err(Error)
+    }
+
+    fn visit_bytes(&mut self, bytes: &[u8]) -> Result<(), Error> {
+        assert_eq!(self.bytes, bytes);
+        Ok(())
+    }
+}
+
+///////////////////////////////////////////////////////////////////////////////
+
+struct BytesDeserializer {
+    bytes: Option<Vec<u8>>,
+}
+
+impl BytesDeserializer {
+    fn new(bytes: Vec<u8>) -> Self {
+        BytesDeserializer {
+            bytes: Some(bytes),
+        }
+    }
+}
+
+impl serde::Deserializer for BytesDeserializer {
+    type Error = Error;
+
+    fn visit<V>(&mut self, _visitor: V) -> Result<V::Value, Error>
+        where V: serde::de::Visitor,
+    {
+        Err(Error)
+    }
+
+    fn visit_bytes<V>(&mut self, mut visitor: V) -> Result<V::Value, Error>
+        where V: serde::de::Visitor,
+    {
+        visitor.visit_byte_buf(self.bytes.take().unwrap())
+    }
+}
+
+///////////////////////////////////////////////////////////////////////////////
+
+#[test]
+fn test_bytes_ser_json() {
+    let buf = vec![];
+    let bytes = Bytes::from(&buf);
+    assert_eq!(json::to_string(&bytes).unwrap(), "[]".to_string());
+
+    let buf = vec![1, 2, 3];
+    let bytes = Bytes::from(&buf);
+    assert_eq!(json::to_string(&bytes).unwrap(), "[1,2,3]".to_string());
+}
+
+#[test]
+fn test_bytes_ser_bytes() {
+    let buf = vec![];
+    let bytes = Bytes::from(&buf);
+    let mut ser = BytesSerializer::new(vec![]);
+    bytes.serialize(&mut ser).unwrap();
+
+    let buf = vec![1, 2, 3];
+    let bytes = Bytes::from(&buf);
+    let mut ser = BytesSerializer::new(vec![1, 2, 3]);
+    bytes.serialize(&mut ser).unwrap();
+}
+
+#[test]
+fn test_byte_buf_ser_json() {
+    let bytes = ByteBuf::new();
+    assert_eq!(json::to_string(&bytes).unwrap(), "[]".to_string());
+
+    let bytes = ByteBuf::from(vec![1, 2, 3]);
+    assert_eq!(json::to_string(&bytes).unwrap(), "[1,2,3]".to_string());
+}
+
+#[test]
+fn test_byte_buf_ser_bytes() {
+    let bytes = ByteBuf::new();
+    let mut ser = BytesSerializer::new(vec![]);
+    bytes.serialize(&mut ser).unwrap();
+
+    let bytes = ByteBuf::from(vec![1, 2, 3]);
+    let mut ser = BytesSerializer::new(vec![1, 2, 3]);
+    bytes.serialize(&mut ser).unwrap();
+}
+
+///////////////////////////////////////////////////////////////////////////////
+
+#[test]
+fn test_byte_buf_de_json() {
+    let bytes = ByteBuf::new();
+    let v: ByteBuf = json::from_str("[]").unwrap();
+    assert_eq!(v, bytes);
+
+    let bytes = ByteBuf::from(vec![1, 2, 3]);
+    let v: ByteBuf = json::from_str("[1, 2, 3]").unwrap();
+    assert_eq!(v, bytes);
+}
+
+#[test]
+fn test_byte_buf_de_bytes() {
+    let mut de = BytesDeserializer::new(vec![]);
+    let bytes = serde::Deserialize::deserialize(&mut de);
+    assert_eq!(bytes, Ok(ByteBuf::new()));
+
+    let mut de = BytesDeserializer::new(vec![1, 2, 3]);
+    let bytes = serde::Deserialize::deserialize(&mut de);
+    assert_eq!(bytes, Ok(ByteBuf::from(vec![1, 2, 3])));
+}

serde_tests/tests/test_de.rs

@@ -0,0 +1,899 @@
+use std::collections::{BTreeMap, BTreeSet, HashMap, HashSet};
+use std::iter;
+use std::vec;
+
+use serde::de::{self, Deserialize, Deserializer, Visitor};
+
+#[derive(Debug)]
+enum Token {
+    Bool(bool),
+    Isize(isize),
+    I8(i8),
+    I16(i16),
+    I32(i32),
+    I64(i64),
+    Usize(usize),
+    U8(u8),
+    U16(u16),
+    U32(u32),
+    U64(u64),
+    F32(f32),
+    F64(f64),
+    Char(char),
+    Str(&'static str),
+    String(String),
+
+    Option(bool),
+
+    Name(&'static str),
+
+    Unit,
+
+    SeqStart(usize),
+    SeqSep,
+    SeqEnd,
+
+    MapStart(usize),
+    MapSep,
+    MapEnd,
+
+    EnumStart(&'static str),
+    EnumEnd,
+}
+
+struct TokenDeserializer {
+    tokens: iter::Peekable<vec::IntoIter<Token>>,
+}
+
+impl<'a> TokenDeserializer {
+    fn new(tokens: Vec<Token>) -> TokenDeserializer {
+        TokenDeserializer {
+            tokens: tokens.into_iter().peekable(),
+        }
+    }
+}
+
+#[derive(Clone, PartialEq, Debug)]
+enum Error {
+    SyntaxError,
+    EndOfStreamError,
+    UnknownFieldError(String),
+    MissingFieldError(&'static str),
+    InvalidName(&'static str),
+}
+
+impl de::Error for Error {
+    fn syntax_error() -> Error { Error::SyntaxError }
+
+    fn end_of_stream_error() -> Error { Error::EndOfStreamError }
+
+    fn unknown_field_error(field: &str) -> Error {
+        Error::UnknownFieldError(field.to_string())
+    }
+
+    fn missing_field_error(field: &'static str) -> Error {
+        Error::MissingFieldError(field)
+    }
+}
+
+impl Deserializer for TokenDeserializer {
+    type Error = Error;
+
+    fn visit<V>(&mut self, mut visitor: V) -> Result<V::Value, Error>
+        where V: Visitor,
+    {
+        match self.tokens.next() {
+            Some(Token::Bool(v)) => visitor.visit_bool(v),
+            Some(Token::Isize(v)) => visitor.visit_isize(v),
+            Some(Token::I8(v)) => visitor.visit_i8(v),
+            Some(Token::I16(v)) => visitor.visit_i16(v),
+            Some(Token::I32(v)) => visitor.visit_i32(v),
+            Some(Token::I64(v)) => visitor.visit_i64(v),
+            Some(Token::Usize(v)) => visitor.visit_usize(v),
+            Some(Token::U8(v)) => visitor.visit_u8(v),
+            Some(Token::U16(v)) => visitor.visit_u16(v),
+            Some(Token::U32(v)) => visitor.visit_u32(v),
+            Some(Token::U64(v)) => visitor.visit_u64(v),
+            Some(Token::F32(v)) => visitor.visit_f32(v),
+            Some(Token::F64(v)) => visitor.visit_f64(v),
+            Some(Token::Char(v)) => visitor.visit_char(v),
+            Some(Token::Str(v)) => visitor.visit_str(v),
+            Some(Token::String(v)) => visitor.visit_string(v),
+            Some(Token::Option(false)) => visitor.visit_none(),
+            Some(Token::Option(true)) => visitor.visit_some(self),
+            Some(Token::Unit) => visitor.visit_unit(),
+            Some(Token::SeqStart(len)) => {
+                visitor.visit_seq(TokenDeserializerSeqVisitor {
+                    de: self,
+                    len: len,
+                })
+            }
+            Some(Token::MapStart(len)) => {
+                visitor.visit_map(TokenDeserializerMapVisitor {
+                    de: self,
+                    len: len,
+                })
+            }
+            Some(Token::Name(_)) => self.visit(visitor),
+            Some(_) => Err(Error::SyntaxError),
+            None => Err(Error::EndOfStreamError),
+        }
+    }
+
+    /// Hook into `Option` deserializing so we can treat `Unit` as a
+    /// `None`, or a regular value as `Some(value)`.
+    fn visit_option<V>(&mut self, mut visitor: V) -> Result<V::Value, Error>
+        where V: Visitor,
+    {
+        match self.tokens.peek() {
+            Some(&Token::Option(false)) => {
+                self.tokens.next();
+                visitor.visit_none()
+            }
+            Some(&Token::Option(true)) => {
+                self.tokens.next();
+                visitor.visit_some(self)
+            }
+            Some(&Token::Unit) => {
+                self.tokens.next();
+                visitor.visit_none()
+            }
+            Some(_) => visitor.visit_some(self),
+            None => Err(Error::EndOfStreamError),
+        }
+    }
+
+    fn visit_enum<V>(&mut self, name: &str, mut visitor: V) -> Result<V::Value, Error>
+        where V: de::EnumVisitor,
+    {
+        match self.tokens.next() {
+            Some(Token::EnumStart(n)) => {
+                if name == n {
+                    visitor.visit(TokenDeserializerVariantVisitor {
+                        de: self,
+                    })
+                } else {
+                    Err(Error::SyntaxError)
+                }
+            }
+            Some(_) => Err(Error::SyntaxError),
+            None => Err(Error::EndOfStreamError),
+        }
+    }
+
+    fn visit_named_unit<V>(&mut self, name: &str, visitor: V) -> Result<V::Value, Error>
+        where V: de::Visitor,
+    {
+        match self.tokens.peek() {
+            Some(&Token::Name(n)) => {
+                if name == n {
+                    self.tokens.next();
+                    self.visit_seq(visitor)
+                } else {
+                    Err(Error::InvalidName(n))
+                }
+            }
+            Some(_) => self.visit(visitor),
+            None => Err(Error::EndOfStreamError),
+        }
+    }
+
+    fn visit_named_seq<V>(&mut self, name: &str, visitor: V) -> Result<V::Value, Error>
+        where V: de::Visitor,
+    {
+        match self.tokens.peek() {
+            Some(&Token::Name(n)) => {
+                if name == n {
+                    self.tokens.next();
+                    self.visit_seq(visitor)
+                } else {
+                    Err(Error::InvalidName(n))
+                }
+            }
+            Some(_) => self.visit_seq(visitor),
+            None => Err(Error::EndOfStreamError),
+        }
+    }
+
+    fn visit_named_map<V>(&mut self, name: &str, visitor: V) -> Result<V::Value, Error>
+        where V: de::Visitor,
+    {
+        match self.tokens.peek() {
+            Some(&Token::Name(n)) => {
+                if name == n {
+                    self.tokens.next();
+                    self.visit_map(visitor)
+                } else {
+                    Err(Error::InvalidName(n))
+                }
+            }
+            Some(_) => self.visit_map(visitor),
+            None => Err(Error::EndOfStreamError),
+        }
+    }
+}
+
+//////////////////////////////////////////////////////////////////////////
+
+struct TokenDeserializerSeqVisitor<'a> {
+    de: &'a mut TokenDeserializer,
+    len: usize,
+}
+
+impl<'a> de::SeqVisitor for TokenDeserializerSeqVisitor<'a> {
+    type Error = Error;
+
+    fn visit<T>(&mut self) -> Result<Option<T>, Error>
+        where T: Deserialize,
+    {
+        match self.de.tokens.peek() {
+            Some(&Token::SeqSep) => {
+                self.len -= 1;
+                self.de.tokens.next();
+                Ok(Some(try!(Deserialize::deserialize(self.de))))
+            }
+            Some(&Token::SeqEnd) => Ok(None),
+            Some(_) => {
+                Err(Error::SyntaxError)
+            }
+            None => Err(Error::EndOfStreamError),
+        }
+    }
+
+    fn end(&mut self) -> Result<(), Error> {
+        assert_eq!(self.len, 0);
+        match self.de.tokens.next() {
+            Some(Token::SeqEnd) => Ok(()),
+            Some(_) => Err(Error::SyntaxError),
+            None => Err(Error::EndOfStreamError),
+        }
+    }
+
+    fn size_hint(&self) -> (usize, Option<usize>) {
+        (self.len, Some(self.len))
+    }
+}
+
+//////////////////////////////////////////////////////////////////////////
+
+struct TokenDeserializerMapVisitor<'a> {
+    de: &'a mut TokenDeserializer,
+    len: usize,
+}
+
+impl<'a> de::MapVisitor for TokenDeserializerMapVisitor<'a> {
+    type Error = Error;
+
+    fn visit_key<K>(&mut self) -> Result<Option<K>, Error>
+        where K: Deserialize,
+    {
+        match self.de.tokens.peek() {
+            Some(&Token::MapSep) => {
+                self.de.tokens.next();
+                self.len -= 1;
+                Ok(Some(try!(Deserialize::deserialize(self.de))))
+            }
+            Some(&Token::MapEnd) => Ok(None),
+            Some(_) => Err(Error::SyntaxError),
+            None => Err(Error::EndOfStreamError),
+        }
+    }
+
+    fn visit_value<V>(&mut self) -> Result<V, Error>
+        where V: Deserialize,
+    {
+        Ok(try!(Deserialize::deserialize(self.de)))
+    }
+
+    fn end(&mut self) -> Result<(), Error> {
+        assert_eq!(self.len, 0);
+        match self.de.tokens.next() {
+            Some(Token::MapEnd) => Ok(()),
+            Some(_) => Err(Error::SyntaxError),
+            None => Err(Error::EndOfStreamError),
+        }
+    }
+
+    fn size_hint(&self) -> (usize, Option<usize>) {
+        (self.len, Some(self.len))
+    }
+}
+
+//////////////////////////////////////////////////////////////////////////
+
+struct TokenDeserializerVariantVisitor<'a> {
+    de: &'a mut TokenDeserializer,
+}
+
+impl<'a> de::VariantVisitor for TokenDeserializerVariantVisitor<'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)
+    }
+
+    fn visit_seq<V>(&mut self, visitor: V) -> Result<V::Value, Error>
+        where V: de::Visitor,
+    {
+        de::Deserializer::visit(self.de, visitor)
+    }
+
+    fn visit_map<V>(&mut self, visitor: V) -> Result<V::Value, Error>
+        where V: de::Visitor,
+    {
+        de::Deserializer::visit(self.de, visitor)
+    }
+}
+
+//////////////////////////////////////////////////////////////////////////
+
+#[derive(Copy, Clone, PartialEq, Debug, Deserialize)]
+struct NamedUnit;
+
+#[derive(PartialEq, Debug, Deserialize)]
+struct NamedSeq(i32, i32, i32);
+
+#[derive(PartialEq, Debug, Deserialize)]
+struct NamedMap {
+    a: i32,
+    b: i32,
+    c: i32,
+}
+
+#[derive(PartialEq, Debug, Deserialize)]
+enum Enum {
+    Unit,
+    Seq(i32, i32, i32),
+    Map { a: i32, b: i32, c: i32 }
+}
+
+//////////////////////////////////////////////////////////////////////////
+
+macro_rules! btreeset {
+    () => {
+        BTreeSet::new()
+    };
+    ($($value:expr),+) => {
+        {
+            let mut set = BTreeSet::new();
+            $(set.insert($value);)+
+            set
+        }
+    }
+}
+
+macro_rules! btreemap {
+    () => {
+        BTreeMap::new()
+    };
+    ($($key:expr => $value:expr),+) => {
+        {
+            let mut map = BTreeMap::new();
+            $(map.insert($key, $value);)+
+            map
+        }
+    }
+}
+
+macro_rules! hashset {
+    () => {
+        HashSet::new()
+    };
+    ($($value:expr),+) => {
+        {
+            let mut set = HashSet::new();
+            $(set.insert($value);)+
+            set
+        }
+    }
+}
+
+macro_rules! hashmap {
+    () => {
+        HashMap::new()
+    };
+    ($($key:expr => $value:expr),+) => {
+        {
+            let mut map = HashMap::new();
+            $(map.insert($key, $value);)+
+            map
+        }
+    }
+}
+
+macro_rules! declare_test {
+    ($name:ident { $($value:expr => $tokens:expr,)+ }) => {
+        #[test]
+        fn $name() {
+            $(
+                let mut de = TokenDeserializer::new($tokens);
+                let value: Result<_, Error> = Deserialize::deserialize(&mut de);
+                assert_eq!(value, Ok($value));
+            )+
+        }
+    }
+}
+
+macro_rules! declare_tests {
+    ($($name:ident { $($value:expr => $tokens:expr,)+ })+) => {
+        $(
+            declare_test!($name { $($value => $tokens,)+ });
+        )+
+    }
+}
+
+//////////////////////////////////////////////////////////////////////////
+
+declare_tests! {
+    test_bool {
+        true => vec![Token::Bool(true)],
+        false => vec![Token::Bool(false)],
+    }
+    test_isize {
+        0isize => vec![Token::Isize(0)],
+        0isize => vec![Token::I8(0)],
+        0isize => vec![Token::I16(0)],
+        0isize => vec![Token::I32(0)],
+        0isize => vec![Token::I64(0)],
+        0isize => vec![Token::Usize(0)],
+        0isize => vec![Token::U8(0)],
+        0isize => vec![Token::U16(0)],
+        0isize => vec![Token::U32(0)],
+        0isize => vec![Token::U64(0)],
+        0isize => vec![Token::F32(0.)],
+        0isize => vec![Token::F64(0.)],
+    }
+    test_ints {
+        0isize => vec![Token::Isize(0)],
+        0i8 => vec![Token::I8(0)],
+        0i16 => vec![Token::I16(0)],
+        0i32 => vec![Token::I32(0)],
+        0i64 => vec![Token::I64(0)],
+    }
+    test_uints {
+        0usize => vec![Token::Usize(0)],
+        0u8 => vec![Token::U8(0)],
+        0u16 => vec![Token::U16(0)],
+        0u32 => vec![Token::U32(0)],
+        0u64 => vec![Token::U64(0)],
+    }
+    test_floats {
+        0f32 => vec![Token::F32(0.)],
+        0f64 => vec![Token::F64(0.)],
+    }
+    test_char {
+        'a' => vec![Token::Char('a')],
+        'a' => vec![Token::Str("a")],
+        'a' => vec![Token::String("a".to_string())],
+    }
+    test_string {
+        "abc".to_string() => vec![Token::Str("abc")],
+        "abc".to_string() => vec![Token::String("abc".to_string())],
+        "a".to_string() => vec![Token::Char('a')],
+    }
+    test_option {
+        None::<i32> => vec![Token::Unit],
+        None::<i32> => vec![Token::Option(false)],
+        Some(1) => vec![Token::I32(1)],
+        Some(1) => vec![
+            Token::Option(true),
+            Token::I32(1),
+        ],
+    }
+    test_unit {
+        () => vec![Token::Unit],
+        () => vec![
+            Token::SeqStart(0),
+            Token::SeqEnd,
+        ],
+        () => vec![
+            Token::Name("Anything"),
+            Token::SeqStart(0),
+            Token::SeqEnd,
+        ],
+    }
+    test_named_unit {
+        NamedUnit => vec![Token::Unit],
+        NamedUnit => vec![
+            Token::Name("NamedUnit"),
+            Token::Unit,
+        ],
+        NamedUnit => vec![
+            Token::SeqStart(0),
+            Token::SeqEnd,
+        ],
+    }
+    test_named_seq {
+        NamedSeq(1, 2, 3) => vec![
+            Token::SeqStart(3),
+                Token::SeqSep,
+                Token::I32(1),
+
+                Token::SeqSep,
+                Token::I32(2),
+
+                Token::SeqSep,
+                Token::I32(3),
+            Token::SeqEnd,
+        ],
+        NamedSeq(1, 2, 3) => vec![
+            Token::Name("NamedSeq"),
+            Token::SeqStart(3),
+                Token::SeqSep,
+                Token::I32(1),
+
+                Token::SeqSep,
+                Token::I32(2),
+
+                Token::SeqSep,
+                Token::I32(3),
+            Token::SeqEnd,
+        ],
+    }
+    test_btreeset {
+        BTreeSet::<isize>::new() => vec![
+            Token::Unit,
+        ],
+        BTreeSet::<isize>::new() => vec![
+            Token::SeqStart(0),
+            Token::SeqEnd,
+        ],
+        btreeset![btreeset![], btreeset![1], btreeset![2, 3]] => vec![
+            Token::SeqStart(3),
+                Token::SeqSep,
+                Token::SeqStart(0),
+                Token::SeqEnd,
+
+                Token::SeqSep,
+                Token::SeqStart(1),
+                    Token::SeqSep,
+                    Token::I32(1),
+                Token::SeqEnd,
+
+                Token::SeqSep,
+                Token::SeqStart(2),
+                    Token::SeqSep,
+                    Token::I32(2),
+
+                    Token::SeqSep,
+                    Token::I32(3),
+                Token::SeqEnd,
+            Token::SeqEnd,
+        ],
+        BTreeSet::<isize>::new() => vec![
+            Token::Name("Anything"),
+            Token::Unit,
+        ],
+        BTreeSet::<isize>::new() => vec![
+            Token::Name("Anything"),
+            Token::SeqStart(0),
+            Token::SeqEnd,
+        ],
+    }
+    test_hashset {
+        HashSet::<isize>::new() => vec![
+            Token::Unit,
+        ],
+        HashSet::<isize>::new() => vec![
+            Token::SeqStart(0),
+            Token::SeqEnd,
+        ],
+        hashset![1, 2, 3] => vec![
+            Token::SeqStart(3),
+                Token::SeqSep,
+                Token::I32(1),
+
+                Token::SeqSep,
+                Token::I32(2),
+
+                Token::SeqSep,
+                Token::I32(3),
+            Token::SeqEnd,
+        ],
+        HashSet::<isize>::new() => vec![
+            Token::Name("Anything"),
+            Token::Unit,
+        ],
+        HashSet::<isize>::new() => vec![
+            Token::Name("Anything"),
+            Token::SeqStart(0),
+            Token::SeqEnd,
+        ],
+    }
+    test_vec {
+        Vec::<isize>::new() => vec![
+            Token::Unit,
+        ],
+        Vec::<isize>::new() => vec![
+            Token::SeqStart(0),
+            Token::SeqEnd,
+        ],
+        vec![vec![], vec![1], vec![2, 3]] => vec![
+            Token::SeqStart(3),
+                Token::SeqSep,
+                Token::SeqStart(0),
+                Token::SeqEnd,
+
+                Token::SeqSep,
+                Token::SeqStart(1),
+                    Token::SeqSep,
+                    Token::I32(1),
+                Token::SeqEnd,
+
+                Token::SeqSep,
+                Token::SeqStart(2),
+                    Token::SeqSep,
+                    Token::I32(2),
+
+                    Token::SeqSep,
+                    Token::I32(3),
+                Token::SeqEnd,
+            Token::SeqEnd,
+        ],
+        Vec::<isize>::new() => vec![
+            Token::Name("Anything"),
+            Token::Unit,
+        ],
+        Vec::<isize>::new() => vec![
+            Token::Name("Anything"),
+            Token::SeqStart(0),
+            Token::SeqEnd,
+        ],
+    }
+    test_array {
+        [0; 0] => vec![
+            Token::Unit,
+        ],
+        [0; 0] => vec![
+            Token::SeqStart(0),
+            Token::SeqEnd,
+        ],
+        ([0; 0], [1], [2, 3]) => vec![
+            Token::SeqStart(3),
+                Token::SeqSep,
+                Token::SeqStart(0),
+                Token::SeqEnd,
+
+                Token::SeqSep,
+                Token::SeqStart(1),
+                    Token::SeqSep,
+                    Token::I32(1),
+                Token::SeqEnd,
+
+                Token::SeqSep,
+                Token::SeqStart(2),
+                    Token::SeqSep,
+                    Token::I32(2),
+
+                    Token::SeqSep,
+                    Token::I32(3),
+                Token::SeqEnd,
+            Token::SeqEnd,
+        ],
+        [0; 0] => vec![
+            Token::Name("Anything"),
+            Token::Unit,
+        ],
+        [0; 0] => vec![
+            Token::Name("Anything"),
+            Token::SeqStart(0),
+            Token::SeqEnd,
+        ],
+    }
+    test_tuple {
+        (1,) => vec![
+            Token::SeqStart(1),
+                Token::SeqSep,
+                Token::I32(1),
+            Token::SeqEnd,
+        ],
+        (1, 2, 3) => vec![
+            Token::SeqStart(3),
+                Token::SeqSep,
+                Token::I32(1),
+
+                Token::SeqSep,
+                Token::I32(2),
+
+                Token::SeqSep,
+                Token::I32(3),
+            Token::SeqEnd,
+        ],
+    }
+    test_btreemap {
+        BTreeMap::<isize, isize>::new() => vec![
+            Token::Unit,
+        ],
+        BTreeMap::<isize, isize>::new() => vec![
+            Token::MapStart(0),
+            Token::MapEnd,
+        ],
+        btreemap![1 => 2] => vec![
+            Token::MapStart(1),
+                Token::MapSep,
+                Token::I32(1),
+                Token::I32(2),
+            Token::MapEnd,
+        ],
+        btreemap![1 => 2, 3 => 4] => vec![
+            Token::MapStart(2),
+                Token::MapSep,
+                Token::I32(1),
+                Token::I32(2),
+
+                Token::MapSep,
+                Token::I32(3),
+                Token::I32(4),
+            Token::MapEnd,
+        ],
+        btreemap![1 => btreemap![], 2 => btreemap![3 => 4, 5 => 6]] => vec![
+            Token::MapStart(2),
+                Token::MapSep,
+                Token::I32(1),
+                Token::MapStart(0),
+                Token::MapEnd,
+
+                Token::MapSep,
+                Token::I32(2),
+                Token::MapStart(2),
+                    Token::MapSep,
+                    Token::I32(3),
+                    Token::I32(4),
+
+                    Token::MapSep,
+                    Token::I32(5),
+                    Token::I32(6),
+                Token::MapEnd,
+            Token::MapEnd,
+        ],
+        BTreeMap::<isize, isize>::new() => vec![
+            Token::Name("Anything"),
+            Token::Unit,
+        ],
+        BTreeMap::<isize, isize>::new() => vec![
+            Token::Name("Anything"),
+            Token::MapStart(0),
+            Token::MapEnd,
+        ],
+    }
+    test_hashmap {
+        HashMap::<isize, isize>::new() => vec![
+            Token::Unit,
+        ],
+        HashMap::<isize, isize>::new() => vec![
+            Token::MapStart(0),
+            Token::MapEnd,
+        ],
+        hashmap![1 => 2] => vec![
+            Token::MapStart(1),
+                Token::MapSep,
+                Token::I32(1),
+                Token::I32(2),
+            Token::MapEnd,
+        ],
+        hashmap![1 => 2, 3 => 4] => vec![
+            Token::MapStart(2),
+                Token::MapSep,
+                Token::I32(1),
+                Token::I32(2),
+
+                Token::MapSep,
+                Token::I32(3),
+                Token::I32(4),
+            Token::MapEnd,
+        ],
+        hashmap![1 => hashmap![], 2 => hashmap![3 => 4, 5 => 6]] => vec![
+            Token::MapStart(2),
+                Token::MapSep,
+                Token::I32(1),
+                Token::MapStart(0),
+                Token::MapEnd,
+
+                Token::MapSep,
+                Token::I32(2),
+                Token::MapStart(2),
+                    Token::MapSep,
+                    Token::I32(3),
+                    Token::I32(4),
+
+                    Token::MapSep,
+                    Token::I32(5),
+                    Token::I32(6),
+                Token::MapEnd,
+            Token::MapEnd,
+        ],
+        HashMap::<isize, isize>::new() => vec![
+            Token::Name("Anything"),
+            Token::Unit,
+        ],
+        HashMap::<isize, isize>::new() => vec![
+            Token::Name("Anything"),
+            Token::MapStart(0),
+            Token::MapEnd,
+        ],
+    }
+    test_named_map {
+        NamedMap { a: 1, b: 2, c: 3 } => vec![
+            Token::MapStart(3),
+                Token::MapSep,
+                Token::Str("a"),
+                Token::I32(1),
+
+                Token::MapSep,
+                Token::Str("b"),
+                Token::I32(2),
+
+                Token::MapSep,
+                Token::Str("c"),
+                Token::I32(3),
+            Token::MapEnd,
+        ],
+        NamedMap { a: 1, b: 2, c: 3 } => vec![
+            Token::Name("NamedMap"),
+            Token::MapStart(3),
+                Token::MapSep,
+                Token::Str("a"),
+                Token::I32(1),
+
+                Token::MapSep,
+                Token::Str("b"),
+                Token::I32(2),
+
+                Token::MapSep,
+                Token::Str("c"),
+                Token::I32(3),
+            Token::MapEnd,
+        ],
+    }
+    test_enum_unit {
+        Enum::Unit => vec![
+            Token::EnumStart("Enum"),
+                Token::Str("Unit"),
+                Token::Unit,
+            Token::EnumEnd,
+        ],
+    }
+    test_enum_seq {
+        Enum::Seq(1, 2, 3) => vec![
+            Token::EnumStart("Enum"),
+                Token::Str("Seq"),
+                Token::SeqStart(3),
+                    Token::SeqSep,
+                    Token::I32(1),
+
+                    Token::SeqSep,
+                    Token::I32(2),
+
+                    Token::SeqSep,
+                    Token::I32(3),
+                Token::SeqEnd,
+            Token::EnumEnd,
+        ],
+    }
+    test_enum_map {
+        Enum::Map { a: 1, b: 2, c: 3 } => vec![
+            Token::EnumStart("Enum"),
+                Token::Str("Map"),
+                Token::MapStart(3),
+                    Token::MapSep,
+                    Token::Str("a"),
+                    Token::I32(1),
+
+                    Token::MapSep,
+                    Token::Str("b"),
+                    Token::I32(2),
+
+                    Token::MapSep,
+                    Token::Str("c"),
+                    Token::I32(3),
+                Token::MapEnd,
+            Token::EnumEnd,
+        ],
+    }
+}

serde_tests/tests/test_json_builder.rs

@@ -0,0 +1,50 @@
+use std::collections::BTreeMap;
+
+use serde::json::value::Value;
+use serde::json::builder::{ArrayBuilder, ObjectBuilder};
+
+#[test]
+fn test_array_builder() {
+    let value = ArrayBuilder::new().unwrap();
+    assert_eq!(value, Value::Array(Vec::new()));
+
+    let value = ArrayBuilder::new()
+        .push(1)
+        .push(2)
+        .push(3)
+        .unwrap();
+    assert_eq!(value, Value::Array(vec!(Value::U64(1), Value::U64(2), Value::U64(3))));
+
+    let value = ArrayBuilder::new()
+        .push_array(|bld| bld.push(1).push(2).push(3))
+        .unwrap();
+    assert_eq!(value, Value::Array(vec!(Value::Array(vec!(Value::U64(1), Value::U64(2), Value::U64(3))))));
+
+    let value = ArrayBuilder::new()
+        .push_object(|bld|
+            bld
+                .insert("a".to_string(), 1)
+                .insert("b".to_string(), 2))
+        .unwrap();
+
+    let mut map = BTreeMap::new();
+    map.insert("a".to_string(), Value::U64(1));
+    map.insert("b".to_string(), Value::U64(2));
+    assert_eq!(value, Value::Array(vec!(Value::Object(map))));
+}
+
+#[test]
+fn test_object_builder() {
+    let value = ObjectBuilder::new().unwrap();
+    assert_eq!(value, Value::Object(BTreeMap::new()));
+
+    let value = ObjectBuilder::new()
+        .insert("a".to_string(), 1)
+        .insert("b".to_string(), 2)
+        .unwrap();
+
+    let mut map = BTreeMap::new();
+    map.insert("a".to_string(), Value::U64(1));
+    map.insert("b".to_string(), Value::U64(2));
+    assert_eq!(value, Value::Object(map));
+}

serde_tests/tests/test_macros.rs

@@ -0,0 +1,477 @@
+use std::collections::BTreeMap;
+use serde::json::{self, Value};
+
+macro_rules! btreemap {
+    () => {
+        BTreeMap::new()
+    };
+    ($($key:expr => $value:expr),+) => {
+        {
+            let mut map = BTreeMap::new();
+            $(map.insert($key, $value);)+
+            map
+        }
+    }
+}
+
+/*
+trait Trait {
+    type Type;
+}
+*/
+
+#[derive(Debug, PartialEq, Serialize, Deserialize)]
+struct NamedUnit;
+
+#[derive(Debug, PartialEq, Serialize)]
+struct SerNamedTuple<'a, 'b, A: 'a, B: 'b, C>(&'a A, &'b mut B, C);
+
+#[derive(Debug, PartialEq, Deserialize)]
+struct DeNamedTuple<A, B, C>(A, B, C);
+
+#[derive(Debug, PartialEq, Serialize)]
+struct SerNamedMap<'a, 'b, A: 'a, B: 'b, C> {
+    a: &'a A,
+    b: &'b mut B,
+    c: C,
+}
+
+#[derive(Debug, PartialEq, Deserialize)]
+struct DeNamedMap<A, B, C> {
+    a: A,
+    b: B,
+    c: C,
+}
+
+#[derive(Debug, PartialEq, Serialize)]
+enum SerEnum<'a, B: 'a, C: /* Trait + */ 'a, D> where D: /* Trait + */ 'a {
+    Unit,
+    Seq(
+        i8,
+        B,
+        &'a C,
+        //C::Type,
+        &'a mut D,
+        //<D as Trait>::Type,
+    ),
+    Map {
+        a: i8,
+        b: B,
+        c: &'a C,
+        //d: C::Type,
+        e: &'a mut D,
+        //f: <D as Trait>::Type,
+    },
+
+    // Make sure we can support more than one variant.
+    _Unit2,
+    _Seq2(
+        i8,
+        B,
+        &'a C,
+        //C::Type,
+        &'a mut D,
+        //<D as Trait>::Type,
+    ),
+    _Map2 {
+        a: i8,
+        b: B,
+        c: &'a C,
+        //d: C::Type,
+        e: &'a mut D,
+        //f: <D as Trait>::Type,
+    },
+}
+
+#[derive(Debug, PartialEq, Deserialize)]
+enum DeEnum<B, C: /* Trait */, D> /* where D: Trait */ {
+    Unit,
+    Seq(
+        i8,
+        B,
+        C,
+        //C::Type,
+        D,
+        //<D as Trait>::Type,
+    ),
+    Map {
+        a: i8,
+        b: B,
+        c: C,
+        //d: C::Type,
+        e: D,
+        //f: <D as Trait>::Type,
+    },
+
+    // Make sure we can support more than one variant.
+    _Unit2,
+    _Seq2(
+        i8,
+        B,
+        C,
+        //C::Type,
+        D,
+        //<D as Trait>::Type,
+    ),
+    _Map2 {
+        a: i8,
+        b: B,
+        c: C,
+        //d: C::Type,
+        e: D,
+        //f: <D as Trait>::Type,
+    },
+}
+
+#[derive(Serialize)]
+enum Lifetimes<'a> {
+    LifetimeSeq(&'a i32),
+    NoLifetimeSeq(i32),
+    LifetimeMap { a: &'a i32 },
+    NoLifetimeMap { a: i32 },
+}
+
+#[test]
+fn test_named_unit() {
+    let named_unit = NamedUnit;
+
+    assert_eq!(
+        json::to_string(&named_unit).unwrap(),
+        "null".to_string()
+    );
+
+    assert_eq!(
+        json::to_value(&named_unit),
+        Value::Null
+    );
+
+    let v: NamedUnit = json::from_str("null").unwrap();
+    assert_eq!(v, named_unit);
+
+    let v: NamedUnit = json::from_value(Value::Null).unwrap();
+    assert_eq!(v, named_unit);
+}
+
+#[test]
+fn test_ser_named_tuple() {
+    let a = 5;
+    let mut b = 6;
+    let c = 7;
+    let named_tuple = SerNamedTuple(&a, &mut b, c);
+
+    assert_eq!(
+        json::to_string(&named_tuple).unwrap(),
+        "[5,6,7]"
+    );
+
+    assert_eq!(
+        json::to_value(&named_tuple),
+        Value::Array(vec![Value::U64(5), Value::U64(6), Value::U64(7)])
+    );
+}
+
+#[test]
+fn test_de_named_tuple() {
+    let v: DeNamedTuple<i32, i32, i32> = json::from_str("[1,2,3]").unwrap();
+    assert_eq!(
+        v,
+        DeNamedTuple(1, 2, 3)
+    );
+
+    let v: Value = json::from_str("[1,2,3]").unwrap();
+    assert_eq!(
+        v,
+        Value::Array(vec![
+            Value::U64(1),
+            Value::U64(2),
+            Value::U64(3),
+        ])
+    );
+}
+
+#[test]
+fn test_ser_named_map() {
+    let a = 5;
+    let mut b = 6;
+    let c = 7;
+    let named_map = SerNamedMap {
+        a: &a,
+        b: &mut b,
+        c: c,
+    };
+
+    assert_eq!(
+        json::to_string(&named_map).unwrap(),
+        "{\"a\":5,\"b\":6,\"c\":7}"
+    );
+
+    assert_eq!(
+        json::to_value(&named_map),
+        Value::Object(btreemap![
+            "a".to_string() => Value::U64(5),
+            "b".to_string() => Value::U64(6),
+            "c".to_string() => Value::U64(7)
+        ])
+    );
+}
+
+#[test]
+fn test_de_named_map() {
+    let v = DeNamedMap {
+        a: 5,
+        b: 6,
+        c: 7,
+    };
+
+    let v2: DeNamedMap<i32, i32, i32> = json::from_str(
+        "{\"a\":5,\"b\":6,\"c\":7}"
+    ).unwrap();
+    assert_eq!(v, v2);
+
+    let v2 = json::from_value(Value::Object(btreemap![
+        "a".to_string() => Value::U64(5),
+        "b".to_string() => Value::U64(6),
+        "c".to_string() => Value::U64(7)
+    ])).unwrap();
+    assert_eq!(v, v2);
+}
+
+#[test]
+fn test_ser_enum_unit() {
+    assert_eq!(
+        json::to_string(&SerEnum::Unit::<u32, u32, u32>).unwrap(),
+        "{\"Unit\":[]}"
+    );
+
+    assert_eq!(
+        json::to_value(&SerEnum::Unit::<u32, u32, u32>),
+        Value::Object(btreemap!(
+            "Unit".to_string() => Value::Array(vec![]))
+        )
+    );
+}
+
+#[test]
+fn test_ser_enum_seq() {
+    let a = 1;
+    let b = 2;
+    let c = 3;
+    //let d = 4;
+    let mut e = 5;
+    //let f = 6;
+
+    assert_eq!(
+        json::to_string(&SerEnum::Seq(
+            a,
+            b,
+            &c,
+            //d,
+            &mut e,
+            //f,
+        )).unwrap(),
+        "{\"Seq\":[1,2,3,5]}".to_string()
+    );
+
+    assert_eq!(
+        json::to_value(&SerEnum::Seq(
+            a,
+            b,
+            &c,
+            //d,
+            &mut e,
+            //e,
+        )),
+        Value::Object(btreemap!(
+            "Seq".to_string() => Value::Array(vec![
+                Value::U64(1),
+                Value::U64(2),
+                Value::U64(3),
+                //Value::U64(4),
+                Value::U64(5),
+                //Value::U64(6),
+            ])
+        ))
+    );
+}
+
+#[test]
+fn test_ser_enum_map() {
+    let a = 1;
+    let b = 2;
+    let c = 3;
+    //let d = 4;
+    let mut e = 5;
+    //let f = 6;
+
+    assert_eq!(
+        json::to_string(&SerEnum::Map {
+            a: a,
+            b: b,
+            c: &c,
+            //d: d,
+            e: &mut e,
+            //f: f,
+        }).unwrap(),
+        "{\"Map\":{\"a\":1,\"b\":2,\"c\":3,\"e\":5}}".to_string()
+    );
+
+    assert_eq!(
+        json::to_value(&SerEnum::Map {
+            a: a,
+            b: b,
+            c: &c,
+            //d: d,
+            e: &mut e,
+            //f: f,
+        }),
+        Value::Object(btreemap!(
+            "Map".to_string() => Value::Object(btreemap![
+                "a".to_string() => Value::U64(1),
+                "b".to_string() => Value::U64(2),
+                "c".to_string() => Value::U64(3),
+                //"d".to_string() => Value::U64(4)
+                "e".to_string() => Value::U64(5)
+                //"f".to_string() => Value::U64(6)
+            ])
+        ))
+    );
+}
+
+#[test]
+fn test_de_enum_unit() {
+    let v: DeEnum<_, _, _> = json::from_str("{\"Unit\":[]}").unwrap();
+    assert_eq!(
+        v,
+        DeEnum::Unit::<u32, u32, u32>
+    );
+
+    let v: DeEnum<_, _, _> = json::from_value(Value::Object(btreemap!(
+        "Unit".to_string() => Value::Array(vec![]))
+    )).unwrap();
+    assert_eq!(
+        v,
+        DeEnum::Unit::<u32, u32, u32>
+    );
+}
+
+#[test]
+fn test_de_enum_seq() {
+    let a = 1;
+    let b = 2;
+    let c = 3;
+    //let d = 4;
+    let e = 5;
+    //let f = 6;
+
+    let v: DeEnum<_, _, _> = json::from_str("{\"Seq\":[1,2,3,5]}").unwrap();
+    assert_eq!(
+        v,
+        DeEnum::Seq(
+            a,
+            b,
+            c,
+            //d,
+            e,
+            //f,
+        )
+    );
+
+    let v: DeEnum<_, _, _> = json::from_value(Value::Object(btreemap!(
+        "Seq".to_string() => Value::Array(vec![
+            Value::U64(1),
+            Value::U64(2),
+            Value::U64(3),
+            //Value::U64(4),
+            Value::U64(5),
+            //Value::U64(6),
+        ])
+    ))).unwrap();
+    assert_eq!(
+        v,
+        DeEnum::Seq(
+            a,
+            b,
+            c,
+            //d,
+            e,
+            //e,
+        )
+    );
+}
+
+#[test]
+fn test_de_enum_map() {
+    let a = 1;
+    let b = 2;
+    let c = 3;
+    //let d = 4;
+    let e = 5;
+    //let f = 6;
+
+    let v: DeEnum<_, _, _> = json::from_str(
+        "{\"Map\":{\"a\":1,\"b\":2,\"c\":3,\"e\":5}}"
+    ).unwrap();
+    assert_eq!(
+        v,
+        DeEnum::Map {
+            a: a,
+            b: b,
+            c: c,
+            //d: d,
+            e: e,
+            //f: f,
+        }
+    );
+
+    let v: DeEnum<_, _, _> = json::from_value(Value::Object(btreemap!(
+        "Map".to_string() => Value::Object(btreemap![
+            "a".to_string() => Value::U64(1),
+            "b".to_string() => Value::U64(2),
+            "c".to_string() => Value::U64(3),
+            //"d".to_string() => Value::U64(4)
+            "e".to_string() => Value::U64(5)
+            //"f".to_string() => Value::U64(6)
+        ])
+    ))).unwrap();
+
+    assert_eq!(
+        v,
+        DeEnum::Map {
+            a: a,
+            b: b,
+            c: c,
+            //d: d,
+            e: e,
+            //f: f,
+        }
+    );
+}
+
+#[test]
+fn test_lifetimes() {
+    let value = 5;
+    let lifetime = Lifetimes::LifetimeSeq(&value);
+    assert_eq!(
+        json::to_string(&lifetime).unwrap(),
+        "{\"LifetimeSeq\":[5]}"
+    );
+
+    let lifetime = Lifetimes::NoLifetimeSeq(5);
+    assert_eq!(
+        json::to_string(&lifetime).unwrap(),
+        "{\"NoLifetimeSeq\":[5]}"
+    );
+
+    let value = 5;
+    let lifetime = Lifetimes::LifetimeMap { a: &value };
+    assert_eq!(
+        json::to_string(&lifetime).unwrap(),
+        "{\"LifetimeMap\":{\"a\":5}}"
+    );
+
+    let lifetime = Lifetimes::NoLifetimeMap { a: 5 };
+    assert_eq!(
+        json::to_string(&lifetime).unwrap(),
+        "{\"NoLifetimeMap\":{\"a\":5}}"
+    );
+}

serde_tests/tests/test_ser.rs

@@ -0,0 +1,540 @@
+use std::vec;
+use std::collections::BTreeMap;
+
+use serde::ser::{Serialize, Serializer, SeqVisitor, MapVisitor};
+
+#[derive(Clone, PartialEq, Debug)]
+pub enum Token<'a> {
+    Bool(bool),
+    Isize(isize),
+    I8(i8),
+    I16(i16),
+    I32(i32),
+    I64(i64),
+    Usize(usize),
+    U8(u8),
+    U16(u16),
+    U32(u32),
+    U64(u64),
+    F32(f32),
+    F64(f64),
+    Char(char),
+    Str(&'a str),
+
+    Option(bool),
+
+    Unit,
+    NamedUnit(&'a str),
+    EnumUnit(&'a str, &'a str),
+
+    SeqStart(Option<usize>),
+    NamedSeqStart(&'a str, Option<usize>),
+    EnumSeqStart(&'a str, &'a str, Option<usize>),
+    SeqSep,
+    SeqEnd,
+
+    MapStart(Option<usize>),
+    NamedMapStart(&'a str, Option<usize>),
+    EnumMapStart(&'a str, &'a str, Option<usize>),
+    MapSep,
+    MapEnd,
+}
+
+struct AssertSerializer<'a> {
+    iter: vec::IntoIter<Token<'a>>,
+}
+
+impl<'a> AssertSerializer<'a> {
+    fn new(values: Vec<Token<'a>>) -> AssertSerializer {
+        AssertSerializer {
+            iter: values.into_iter(),
+        }
+    }
+
+    fn visit_sequence<V>(&mut self, mut visitor: V) -> Result<(), ()>
+        where V: SeqVisitor
+    {
+        while let Some(()) = try!(visitor.visit(self)) { }
+
+        assert_eq!(self.iter.next(), Some(Token::SeqEnd));
+
+        Ok(())
+    }
+
+    fn visit_mapping<V>(&mut self, mut visitor: V) -> Result<(), ()>
+        where V: MapVisitor
+    {
+        while let Some(()) = try!(visitor.visit(self)) { }
+
+        assert_eq!(self.iter.next(), Some(Token::MapEnd));
+
+        Ok(())
+    }
+}
+
+impl<'a> Serializer for AssertSerializer<'a> {
+    type Error = ();
+
+    fn visit_unit(&mut self) -> Result<(), ()> {
+        assert_eq!(self.iter.next(), Some(Token::Unit));
+        Ok(())
+    }
+
+    fn visit_named_unit(&mut self, name: &str) -> Result<(), ()> {
+        assert_eq!(self.iter.next().unwrap(), Token::NamedUnit(name));
+        Ok(())
+    }
+
+    fn visit_enum_unit(&mut self, name: &str, variant: &str) -> Result<(), ()> {
+        assert_eq!(self.iter.next().unwrap(), Token::EnumUnit(name, variant));
+        Ok(())
+    }
+
+    fn visit_bool(&mut self, v: bool) -> Result<(), ()> {
+        assert_eq!(self.iter.next(), Some(Token::Bool(v)));
+        Ok(())
+    }
+
+    fn visit_isize(&mut self, v: isize) -> Result<(), ()> {
+        assert_eq!(self.iter.next(), Some(Token::Isize(v)));
+        Ok(())
+    }
+
+    fn visit_i8(&mut self, v: i8) -> Result<(), ()> {
+        assert_eq!(self.iter.next(), Some(Token::I8(v)));
+        Ok(())
+    }
+
+    fn visit_i16(&mut self, v: i16) -> Result<(), ()> {
+        assert_eq!(self.iter.next(), Some(Token::I16(v)));
+        Ok(())
+    }
+
+    fn visit_i32(&mut self, v: i32) -> Result<(), ()> {
+        assert_eq!(self.iter.next(), Some(Token::I32(v)));
+        Ok(())
+    }
+
+    fn visit_i64(&mut self, v: i64) -> Result<(), ()> {
+        assert_eq!(self.iter.next(), Some(Token::I64(v)));
+        Ok(())
+    }
+
+    fn visit_usize(&mut self, v: usize) -> Result<(), ()> {
+        assert_eq!(self.iter.next(), Some(Token::Usize(v)));
+        Ok(())
+    }
+
+    fn visit_u8(&mut self, v: u8) -> Result<(), ()> {
+        assert_eq!(self.iter.next(), Some(Token::U8(v)));
+        Ok(())
+    }
+
+    fn visit_u16(&mut self, v: u16) -> Result<(), ()> {
+        assert_eq!(self.iter.next(), Some(Token::U16(v)));
+        Ok(())
+    }
+
+    fn visit_u32(&mut self, v: u32) -> Result<(), ()> {
+        assert_eq!(self.iter.next(), Some(Token::U32(v)));
+        Ok(())
+    }
+
+    fn visit_u64(&mut self, v: u64) -> Result<(), ()> {
+        assert_eq!(self.iter.next(), Some(Token::U64(v)));
+        Ok(())
+    }
+
+    fn visit_f32(&mut self, v: f32) -> Result<(), ()> {
+        assert_eq!(self.iter.next(), Some(Token::F32(v)));
+        Ok(())
+    }
+
+    fn visit_f64(&mut self, v: f64) -> Result<(), ()> {
+        assert_eq!(self.iter.next(), Some(Token::F64(v)));
+        Ok(())
+    }
+
+    fn visit_char(&mut self, v: char) -> Result<(), ()> {
+        assert_eq!(self.iter.next(), Some(Token::Char(v)));
+        Ok(())
+    }
+
+    fn visit_str(&mut self, v: &str) -> Result<(), ()> {
+        assert_eq!(self.iter.next().unwrap(), Token::Str(v));
+        Ok(())
+    }
+
+    fn visit_none(&mut self) -> Result<(), ()> {
+        assert_eq!(self.iter.next(), Some(Token::Option(false)));
+        Ok(())
+    }
+
+    fn visit_some<V>(&mut self, value: V) -> Result<(), ()>
+        where V: Serialize,
+    {
+        assert_eq!(self.iter.next(), Some(Token::Option(true)));
+        value.serialize(self)
+    }
+
+
+    fn visit_seq<V>(&mut self, visitor: V) -> Result<(), ()>
+        where V: SeqVisitor
+    {
+        let len = visitor.len();
+
+        assert_eq!(self.iter.next(), Some(Token::SeqStart(len)));
+
+        self.visit_sequence(visitor)
+    }
+
+    fn visit_named_seq<V>(&mut self, name: &str, visitor: V) -> Result<(), ()>
+        where V: SeqVisitor
+    {
+        let len = visitor.len();
+
+        assert_eq!(self.iter.next().unwrap(), Token::NamedSeqStart(name, len));
+
+        self.visit_sequence(visitor)
+    }
+
+    fn visit_enum_seq<V>(&mut self,
+                         name: &str,
+                         variant: &str,
+                         visitor: V) -> Result<(), ()>
+        where V: SeqVisitor
+    {
+        let len = visitor.len();
+
+        assert_eq!(self.iter.next().unwrap(), Token::EnumSeqStart(name, variant, len));
+
+        self.visit_sequence(visitor)
+    }
+
+    fn visit_seq_elt<T>(&mut self, value: T) -> Result<(), ()>
+        where T: Serialize
+    {
+        assert_eq!(self.iter.next(), Some(Token::SeqSep));
+        value.serialize(self)
+    }
+
+    fn visit_map<V>(&mut self, visitor: V) -> Result<(), ()>
+        where V: MapVisitor
+    {
+        let len = visitor.len();
+
+        assert_eq!(self.iter.next(), Some(Token::MapStart(len)));
+
+        self.visit_mapping(visitor)
+    }
+
+    fn visit_named_map<V>(&mut self, name: &str, visitor: V) -> Result<(), ()>
+        where V: MapVisitor
+    {
+        let len = visitor.len();
+
+        assert_eq!(self.iter.next().unwrap(), Token::NamedMapStart(name, len));
+
+        self.visit_mapping(visitor)
+    }
+
+    fn visit_enum_map<V>(&mut self, name: &str, variant: &str, visitor: V) -> Result<(), ()>
+        where V: MapVisitor
+    {
+        let len = visitor.len();
+
+        assert_eq!(self.iter.next().unwrap(), Token::EnumMapStart(name, variant, len));
+
+        self.visit_mapping(visitor)
+    }
+
+    fn visit_map_elt<K, V>(&mut self, key: K, value: V) -> Result<(), ()>
+        where K: Serialize,
+              V: Serialize,
+    {
+        assert_eq!(self.iter.next(), Some(Token::MapSep));
+
+        try!(key.serialize(self));
+        value.serialize(self)
+    }
+}
+
+//////////////////////////////////////////////////////////////////////////
+
+#[derive(Serialize)]
+struct NamedUnit;
+
+#[derive(Serialize)]
+struct NamedSeq(i32, i32, i32);
+
+#[derive(Serialize)]
+struct NamedMap {
+    a: i32,
+    b: i32,
+    c: i32,
+}
+
+#[derive(Serialize)]
+enum Enum {
+    Unit,
+    Seq(i32, i32),
+    Map { a: i32, b: i32 },
+}
+
+//////////////////////////////////////////////////////////////////////////
+
+macro_rules! btreemap {
+    () => {
+        BTreeMap::new()
+    };
+    ($($key:expr => $value:expr),+) => {
+        {
+            let mut map = BTreeMap::new();
+            $(map.insert($key, $value);)+
+            map
+        }
+    }
+}
+
+macro_rules! declare_test {
+    ($name:ident { $($value:expr => $tokens:expr,)+ }) => {
+        #[test]
+        fn $name() {
+            $(
+                let mut ser = AssertSerializer::new($tokens);
+                assert_eq!($value.serialize(&mut ser), Ok(()));
+            )+
+        }
+    }
+}
+
+macro_rules! declare_tests {
+    ($($name:ident { $($value:expr => $tokens:expr,)+ })+) => {
+        $(
+            declare_test!($name { $($value => $tokens,)+ });
+        )+
+    }
+}
+
+declare_tests! {
+    test_unit {
+        () => vec![Token::Unit],
+    }
+    test_bool {
+        true => vec![Token::Bool(true)],
+        false => vec![Token::Bool(false)],
+    }
+    test_isizes {
+        0isize => vec![Token::Isize(0)],
+        0i8 => vec![Token::I8(0)],
+        0i16 => vec![Token::I16(0)],
+        0i32 => vec![Token::I32(0)],
+        0i64 => vec![Token::I64(0)],
+    }
+    test_usizes {
+        0usize => vec![Token::Usize(0)],
+        0u8 => vec![Token::U8(0)],
+        0u16 => vec![Token::U16(0)],
+        0u32 => vec![Token::U32(0)],
+        0u64 => vec![Token::U64(0)],
+    }
+    test_floats {
+        0f32 => vec![Token::F32(0.)],
+        0f64 => vec![Token::F64(0.)],
+    }
+    test_char {
+        'a' => vec![Token::Char('a')],
+    }
+    test_str {
+        "abc" => vec![Token::Str("abc")],
+        "abc".to_string() => vec![Token::Str("abc")],
+    }
+    test_option {
+        None::<i32> => vec![Token::Option(false)],
+        Some(1) => vec![
+            Token::Option(true),
+            Token::I32(1),
+        ],
+    }
+    test_slice {
+        &[0][..0] => vec![
+            Token::SeqStart(Some(0)),
+            Token::SeqEnd,
+        ],
+        &[1, 2, 3][..] => vec![
+            Token::SeqStart(Some(3)),
+                Token::SeqSep,
+                Token::I32(1),
+
+                Token::SeqSep,
+                Token::I32(2),
+
+                Token::SeqSep,
+                Token::I32(3),
+            Token::SeqEnd,
+        ],
+    }
+    test_array {
+        [0; 0] => vec![
+            Token::SeqStart(Some(0)),
+            Token::SeqEnd,
+        ],
+        [1, 2, 3] => vec![
+            Token::SeqStart(Some(3)),
+                Token::SeqSep,
+                Token::I32(1),
+
+                Token::SeqSep,
+                Token::I32(2),
+
+                Token::SeqSep,
+                Token::I32(3),
+            Token::SeqEnd,
+        ],
+    }
+    test_vec {
+        Vec::<isize>::new() => vec![
+            Token::SeqStart(Some(0)),
+            Token::SeqEnd,
+        ],
+        vec![vec![], vec![1], vec![2, 3]] => vec![
+            Token::SeqStart(Some(3)),
+                Token::SeqSep,
+                Token::SeqStart(Some(0)),
+                Token::SeqEnd,
+
+                Token::SeqSep,
+                Token::SeqStart(Some(1)),
+                    Token::SeqSep,
+                    Token::I32(1),
+                Token::SeqEnd,
+
+                Token::SeqSep,
+                Token::SeqStart(Some(2)),
+                    Token::SeqSep,
+                    Token::I32(2),
+
+                    Token::SeqSep,
+                    Token::I32(3),
+                Token::SeqEnd,
+            Token::SeqEnd,
+        ],
+    }
+    test_tuple {
+        (1,) => vec![
+            Token::SeqStart(Some(1)),
+                Token::SeqSep,
+                Token::I32(1),
+            Token::SeqEnd,
+        ],
+        (1, 2, 3) => vec![
+            Token::SeqStart(Some(3)),
+                Token::SeqSep,
+                Token::I32(1),
+
+                Token::SeqSep,
+                Token::I32(2),
+
+                Token::SeqSep,
+                Token::I32(3),
+            Token::SeqEnd,
+        ],
+    }
+    test_btreemap {
+        btreemap![1 => 2] => vec![
+            Token::MapStart(Some(1)),
+                Token::MapSep,
+                Token::I32(1),
+                Token::I32(2),
+            Token::MapEnd,
+        ],
+        btreemap![1 => 2, 3 => 4] => vec![
+            Token::MapStart(Some(2)),
+                Token::MapSep,
+                Token::I32(1),
+                Token::I32(2),
+
+                Token::MapSep,
+                Token::I32(3),
+                Token::I32(4),
+            Token::MapEnd,
+        ],
+        btreemap![1 => btreemap![], 2 => btreemap![3 => 4, 5 => 6]] => vec![
+            Token::MapStart(Some(2)),
+                Token::MapSep,
+                Token::I32(1),
+                Token::MapStart(Some(0)),
+                Token::MapEnd,
+
+                Token::MapSep,
+                Token::I32(2),
+                Token::MapStart(Some(2)),
+                    Token::MapSep,
+                    Token::I32(3),
+                    Token::I32(4),
+
+                    Token::MapSep,
+                    Token::I32(5),
+                    Token::I32(6),
+                Token::MapEnd,
+            Token::MapEnd,
+        ],
+    }
+    test_named_unit {
+        NamedUnit => vec![Token::NamedUnit("NamedUnit")],
+    }
+    test_named_seq {
+        NamedSeq(1, 2, 3) => vec![
+            Token::NamedSeqStart("NamedSeq", Some(3)),
+                Token::SeqSep,
+                Token::I32(1),
+
+                Token::SeqSep,
+                Token::I32(2),
+
+                Token::SeqSep,
+                Token::I32(3),
+            Token::SeqEnd,
+        ],
+    }
+    test_named_map {
+        NamedMap { a: 1, b: 2, c: 3 } => vec![
+            Token::NamedMapStart("NamedMap", Some(3)),
+                Token::MapSep,
+                Token::Str("a"),
+                Token::I32(1),
+
+                Token::MapSep,
+                Token::Str("b"),
+                Token::I32(2),
+
+                Token::MapSep,
+                Token::Str("c"),
+                Token::I32(3),
+            Token::MapEnd,
+        ],
+    }
+    test_enum {
+        Enum::Unit => vec![Token::EnumUnit("Enum", "Unit")],
+        Enum::Seq(1, 2) => vec![
+            Token::EnumSeqStart("Enum", "Seq", Some(2)),
+                Token::SeqSep,
+                Token::I32(1),
+
+                Token::SeqSep,
+                Token::I32(2),
+            Token::SeqEnd,
+        ],
+        Enum::Map { a: 1, b: 2 } => vec![
+            Token::EnumMapStart("Enum", "Map", Some(2)),
+                Token::MapSep,
+                Token::Str("a"),
+                Token::I32(1),
+
+                Token::MapSep,
+                Token::Str("b"),
+                Token::I32(2),
+            Token::MapEnd,
+        ],
+    }
+}

test_suite/Cargo.toml

@@ -1,32 +0,0 @@
-[package]
-name = "serde_test_suite"
-version = "0.0.0"
-authors = ["Erick Tryzelaar <erick.tryzelaar@gmail.com>"]
-license = "MIT/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/"
-readme = "README.md"
-keywords = ["serialization"]
-publish = false
-
-[features]
-unstable-testing = [
-    "compiletest_rs",
-    "serde/unstable-testing",
-]
-
-[dev-dependencies]
-fnv = "1.0"
-rustc-serialize = "0.3.16"
-serde = { path = "../serde" }
-serde_derive = { path = "../serde_derive" }
-serde_test = { path = "../serde_test" }
-
-[dependencies]
-compiletest_rs = { version = "0.2", optional = true }
-
-[[test]]
-name = "test"
-path = "tests/test.rs"

test_suite/deps/Cargo.toml

@@ -1,11 +0,0 @@
-[package]
-name = "serde_test_suite_deps"
-version = "0.0.0"
-authors = ["David Tolnay <dtolnay@gmail.com>"]
-publish = false
-
-[workspace]
-
-[dependencies]
-serde = { path = "../../serde" }
-serde_derive = { path = "../../serde_derive" }

test_suite/no_std/Cargo.toml

@@ -1,8 +0,0 @@
-[package]
-name = "serde_derive_tests_no_std"
-version = "0.0.0"
-publish = false
-
-[dependencies]
-serde = { path = "../../serde", default-features = false }
-serde_derive = { path = "../../serde_derive" }

test_suite/no_std/src/main.rs

@@ -1,52 +0,0 @@
-#![feature(lang_items, start, libc)]
-#![no_std]
-
-extern crate libc;
-
-#[start]
-fn start(_argc: isize, _argv: *const *const u8) -> isize {
-    0
-}
-
-#[lang = "eh_personality"]
-#[no_mangle]
-pub extern fn rust_eh_personality() {}
-
-#[lang = "eh_unwind_resume"]
-#[no_mangle]
-pub extern fn rust_eh_unwind_resume() {}
-
-#[lang = "panic_fmt"]
-#[no_mangle]
-pub extern fn rust_begin_panic(_msg: core::fmt::Arguments,
-                               _file: &'static str,
-                               _line: u32) -> ! {
-    unsafe {
-        libc::abort()
-    }
-}
-
-//////////////////////////////////////////////////////////////////////////////
-
-#[macro_use]
-extern crate serde_derive;
-
-#[derive(Serialize, Deserialize)]
-struct Unit;
-
-#[derive(Serialize, Deserialize)]
-struct Newtype(u8);
-
-#[derive(Serialize, Deserialize)]
-struct Tuple(u8, u8);
-
-#[derive(Serialize, Deserialize)]
-struct Struct { f: u8 }
-
-#[derive(Serialize, Deserialize)]
-enum Enum {
-    Unit,
-    Newtype(u8),
-    Tuple(u8, u8),
-    Struct { f: u8 },
-}

test_suite/tests/compile-fail/duplicate-attribute/rename-and-ser.rs

@@ -1,10 +0,0 @@
-#[macro_use]
-extern crate serde_derive;
-
-#[derive(Serialize)] //~ ERROR: proc-macro derive panicked
-struct S {
-    #[serde(rename="x", serialize="y")] //~^^ HELP: unknown serde field attribute `serialize`
-    x: (),
-}
-
-fn main() {}

test_suite/tests/compile-fail/duplicate-attribute/rename-rename-de.rs

@@ -1,11 +0,0 @@
-#[macro_use]
-extern crate serde_derive;
-
-#[derive(Serialize)] //~ ERROR: proc-macro derive panicked
-struct S {
-    #[serde(rename="x")]
-    #[serde(rename(deserialize="y"))] //~^^^ HELP: duplicate serde attribute `rename`
-    x: (),
-}
-
-fn main() {}

test_suite/tests/compile-fail/duplicate-attribute/rename-ser-rename-ser.rs

@@ -1,10 +0,0 @@
-#[macro_use]
-extern crate serde_derive;
-
-#[derive(Serialize)] //~ ERROR: proc-macro derive panicked
-struct S {
-    #[serde(rename(serialize="x"), rename(serialize="y"))] //~^^ HELP: duplicate serde attribute `rename`
-    x: (),
-}
-
-fn main() {}

test_suite/tests/compile-fail/duplicate-attribute/rename-ser-rename.rs

@@ -1,11 +0,0 @@
-#[macro_use]
-extern crate serde_derive;
-
-#[derive(Serialize)] //~ ERROR: proc-macro derive panicked
-struct S {
-    #[serde(rename(serialize="x"))]
-    #[serde(rename="y")] //~^^^ HELP: duplicate serde attribute `rename`
-    x: (),
-}
-
-fn main() {}

test_suite/tests/compile-fail/duplicate-attribute/rename-ser-ser.rs

@@ -1,10 +0,0 @@
-#[macro_use]
-extern crate serde_derive;
-
-#[derive(Serialize)] //~ ERROR: proc-macro derive panicked
-struct S {
-    #[serde(rename(serialize="x", serialize="y"))] //~^^ HELP: duplicate serde attribute `rename`
-    x: (),
-}
-
-fn main() {}

test_suite/tests/compile-fail/duplicate-attribute/two-rename-ser.rs

@@ -1,11 +0,0 @@
-#[macro_use]
-extern crate serde_derive;
-
-#[derive(Serialize)] //~ ERROR: proc-macro derive panicked
-struct S {
-    #[serde(rename(serialize="x"))]
-    #[serde(rename(serialize="y"))] //~^^^ HELP: duplicate serde attribute `rename`
-    x: (),
-}
-
-fn main() {}

test_suite/tests/compile-fail/enum-representation/internal-tuple-variant.rs

@@ -1,10 +0,0 @@
-#[macro_use]
-extern crate serde_derive;
-
-#[derive(Serialize)] //~ ERROR: proc-macro derive panicked
-#[serde(tag = "type")] //~^ HELP: #[serde(tag = "...")] cannot be used with tuple variants
-enum E {
-    Tuple(u8, u8),
-}
-
-fn main() {}

test_suite/tests/compile-fail/enum-representation/internally-tagged-struct.rs

@@ -1,8 +0,0 @@
-#[macro_use]
-extern crate serde_derive;
-
-#[derive(Serialize)] //~ ERROR: proc-macro derive panicked
-#[serde(tag = "type")] //~^ HELP: #[serde(tag = "...")] can only be used on enums
-struct S;
-
-fn main() {}

test_suite/tests/compile-fail/enum-representation/untagged-and-internal.rs

@@ -1,12 +0,0 @@
-#[macro_use]
-extern crate serde_derive;
-
-#[derive(Serialize)] //~ ERROR: proc-macro derive panicked
-#[serde(untagged)]
-#[serde(tag = "type")] //~^^ HELP: enum cannot be both untagged and internally tagged
-enum E {
-    A(u8),
-    B(String),
-}
-
-fn main() {}

test_suite/tests/compile-fail/enum-representation/untagged-struct.rs

@@ -1,8 +0,0 @@
-#[macro_use]
-extern crate serde_derive;
-
-#[derive(Serialize)] //~ ERROR: proc-macro derive panicked
-#[serde(untagged)] //~^ HELP: #[serde(untagged)] can only be used on enums
-struct S;
-
-fn main() {}

test_suite/tests/compile-fail/str_ref_deser.rs

@@ -1,9 +0,0 @@
-#[macro_use]
-extern crate serde_derive;
-
-#[derive(Serialize, Deserialize)] //~ ERROR: proc-macro derive panicked
-struct Test<'a> {
-    s: &'a str, //~^^ HELP: Serde does not support deserializing fields of type &str
-}
-
-fn main() {}

test_suite/tests/compile-fail/unknown-attribute/container.rs

@@ -1,10 +0,0 @@
-#[macro_use]
-extern crate serde_derive;
-
-#[derive(Serialize)] //~ ERROR: proc-macro derive panicked
-#[serde(abc="xyz")] //~^ HELP: unknown serde container attribute `abc`
-struct A {
-    x: u32,
-}
-
-fn main() { }

test_suite/tests/compile-fail/unknown-attribute/field.rs

@@ -1,10 +0,0 @@
-#[macro_use]
-extern crate serde_derive;
-
-#[derive(Serialize)] //~ ERROR: proc-macro derive panicked
-struct C {
-    #[serde(abc="xyz")] //~^^ HELP: unknown serde field attribute `abc`
-    x: u32,
-}
-
-fn main() { }

test_suite/tests/compile-fail/unknown-attribute/variant.rs

@@ -1,10 +0,0 @@
-#[macro_use]
-extern crate serde_derive;
-
-#[derive(Serialize)] //~ ERROR: proc-macro derive panicked
-enum E {
-    #[serde(abc="xyz")] //~^^ HELP: unknown serde variant attribute `abc`
-    V,
-}
-
-fn main() { }

test_suite/tests/compiletest.rs

@@ -1,26 +0,0 @@
-extern crate compiletest_rs as compiletest;
-
-use std::env;
-
-fn run_mode(mode: &'static str) {
-    let mut config = compiletest::default_config();
-
-    config.mode = mode.parse().expect("invalid mode");
-    config.target_rustcflags = Some("-L deps/target/debug/deps".to_owned());
-    if let Ok(name) = env::var("TESTNAME") {
-        config.filter = Some(name);
-    }
-    config.src_base = format!("tests/{}", mode).into();
-
-    compiletest::run_tests(&config);
-}
-
-#[test]
-fn compile_fail() {
-    run_mode("compile-fail");
-}
-
-#[test]
-fn run_pass() {
-    run_mode("run-pass");
-}