Version bump

Expose serde_json::from_{iter,reader,slice}

.travis.yml

@@ -1,3 +1,4 @@
+sudo: false
 language: rust
 rust:
   - stable
@@ -25,10 +26,12 @@ after_success: |
   (cd serde && cargo doc --no-deps) &&
   (cd serde_codegen && cargo doc --no-deps) &&
   (cd serde_macros && cargo doc --no-deps) &&
+  (cd serde_json && 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 &&
+  cp -r serde_json/target/doc target/doc/serde_json &&
   echo "<meta http-equiv=refresh content=0;url=`echo $TRAVIS_REPO_SLUG | cut -d '/' -f 2`/index.html>" > target/doc/index.html &&
-  sudo pip install ghp-import &&
+  pip install ghp-import &&
   ghp-import -n target/doc &&
   git push -fq https://${GH_TOKEN}@github.com/${TRAVIS_REPO_SLUG}.git gh-pages

README.md

@@ -10,78 +10,210 @@ 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.
 
-Documentation is available at http://serde-rs.github.io/serde/serde
+Documentation is available at:
 
-Making a Type Serializable
-==========================
+* [serde](https://serde-rs.github.io/serde/serde/serde/index.html)
+* [serde\_json](https://serde-rs.github.io/serde/serde_json/serde_json/index.html)
+* [serde\_codegen](https://serde-rs.github.io/serde/serde_codegen/serde_codegen/index.html)
 
-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:
+Using Serde
+===========
+
+Here is a simple example that demonstrates how to use Serde by serializing and
+deserializing to JSON. Serde comes with some powerful code generation libraries
+that work with Stable and Nightly Rust that eliminate much of the complexity of
+hand rolling serialization and deserialization for a given type. First lets see
+how we would use Nightly Rust, which is currently a bit simpler than Stable
+Rust:
+
+`Cargo.toml`:
+
+```toml
+[package]
+name = "serde_example_nightly"
+version = "0.1.0"
+authors = ["Erick Tryzelaar <erick.tryzelaar@gmail.com>"]
+
+[dependencies]
+serde = "*"
+serde_json = "*"
+serde_macros = "*"
+```
+
+`src/main.rs`
 
 ```rust
 #![feature(custom_derive, plugin)]
 #![plugin(serde_macros)]
 
 extern crate serde;
+extern crate serde_json;
 
-...
-
-#[derive(Serialize, Deserialize)]
+#[derive(Serialize, Deserialize, Debug)]
 struct Point {
     x: i32,
     y: i32,
 }
+
+fn main() {
+    let point = Point { x: 1, y: 2 };
+    let serialized = serde_json::to_string(&point).unwrap();
+
+    println!("{}", serialized);
+
+    let deserialized: Point = serde_json::from_str(&serialized_point).unwrap();
+
+    println!("{:?}", deserialized);
+}
 ```
 
-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:
+When run, it produces:
+
+```
+% cargo run
+{"x":1,"y":2}
+Point { x: 1, y: 2 }
+```
+
+Stable Rust is a little more complicated because it does not yet support
+compiler plugins. Instead we need to use the code generation library
+[syntex](https://github.com/erickt/rust-syntex) for this:
+
+```toml
+[package]
+name = "serde_example"
+version = "0.1.0"
+authors = ["Erick Tryzelaar <erick.tryzelaar@gmail.com>"]
+build = "build.rs"
+
+[build-dependencies]
+serde_codegen = "*"
+syntex = "*"
+
+[dependencies]
+serde = "*"
+serde_json = "*"
+```
+
+`src/main.rs`:
 
 ```rust
-use serde::json;
+extern crate serde;
+extern crate 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();
+include!(concat!(env!("OUT_DIR"), "/main.rs"));
 ```
 
-[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):
+`src/main.rs.in`:
 
 ```rust
-let point = Point { x: 1, y: 2 };
-let point_value = json::to_value(&point).unwrap();
+#[derive(Serialize, Deserialize, Debug)]
+struct Point {
+    x: i32,
+    y: i32,
+}
 
-println!("{}", point_value.find("x")); // prints: Some(1)
+fn main() {
+    let point = Point { x: 1, y: 2 };
+    let serialized = serde_json::to_string(&point).unwrap();
 
-let deserialize_point: Point = json::from_value(point_value).unwrap();
+    println!("{}", serialized);
+
+    let deserialized: Point = serde_json::from_str(&serialized_point).unwrap();
+
+    println!("{:?}", deserialized);
+}
 ```
 
+This also produces:
+
+```
+% cargo run
+{"x":1,"y":2}
+Point { x: 1, y: 2 }
+```
+
+While this works well with Stable Rust, be aware that the error locations
+currently are reported in the generated file instead of in the source file. You
+may find it easier to develop with Nightly Rust and `serde\_macros`, then
+deploy with Stable Rust and `serde_codegen`. It's possible to combine both
+approaches in one setup:
+
+`Cargo.toml`:
+
+```toml
+[package]
+name = "serde_example"
+version = "0.1.0"
+authors = ["Erick Tryzelaar <erick.tryzelaar@gmail.com>"]
+build = "build.rs"
+
+[features]
+default = ["serde_codegen"]
+nightly = ["serde_macros"]
+
+[build-dependencies]
+serde_codegen = { version = "*", optional = true }
+syntex = "*"
+
+[dependencies]
+serde = "*"
+serde_json = "*"
+serde_macros = { version = "*", optional = true }
+```
+
+`build.rs`:
+
+```rust
+#[cfg(not(feature = "serde_macros"))]
+mod inner {
+    extern crate syntex;
+    extern crate serde_codegen;
+
+    use std::env;
+    use std::path::Path;
+
+    pub fn main() {
+        let out_dir = env::var_os("OUT_DIR").unwrap();
+
+        let src = Path::new("src/main.rs.in");
+        let dst = Path::new(&out_dir).join("main.rs");
+
+        let mut registry = syntex::Registry::new();
+
+        serde_codegen::register(&mut registry);
+        registry.expand("", &src, &dst).unwrap();
+    }
+}
+
+#[cfg(feature = "serde_macros")]
+mod inner {
+    pub fn main() {}
+}
+
+fn main() {
+    inner::main();
+}
+```
+
+`src/main.rs`:
+
+```rust
+#![cfg_attr(feature = "serde_macros", feature(custom_derive, plugin))]
+#![cfg_attr(feature = "serde_macros", plugin(serde_macros))]
+
+extern crate serde;
+extern crate serde_json;
+
+#[cfg(feature = "serde_macros")]
+include!("main.rs.in");
+
+#[cfg(not(feature = "serde_macros"))]
+include!(concat!(env!("OUT_DIR"), "/main.rs"));
+```
+
+The `src/main.rs.in` is the same as before.
+
 Serialization without Macros
 ============================
 
@@ -174,7 +306,7 @@ impl<K, V, I> MapVisitor for MapIteratorVisitor<I>
 ```
 
 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
+as a named map. Its visitor uses a simple state machine to iterate through all
 the fields:
 
 ```rust
@@ -187,7 +319,7 @@ 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 {
+        serializer.visit_struct("Point", PointMapVisitor {
             value: self,
             state: 0,
         })
@@ -206,11 +338,11 @@ impl<'a> serde::ser::MapVisitor for PointMapVisitor<'a> {
         match self.state {
             0 => {
                 self.state += 1;
-                Ok(Some(try!(serializer.visit_map_elt("x", &self.value.x))))
+                Ok(Some(try!(serializer.visit_struct_elt("x", &self.value.x))))
             }
             1 => {
                 self.state += 1;
-                Ok(Some(try!(serializer.visit_map_elt("y", &self.value.y))))
+                Ok(Some(try!(serializer.visit_struct_elt("y", &self.value.y))))
             }
             _ => {
                 Ok(None)
@@ -275,7 +407,7 @@ to generate an error for a few common error conditions. Here's how it could be u
     fn visit_string<E>(&mut self, _: String) -> Result<i32, E>
         where E: Error,
     {
-        Err(serde::de::Error::syntax_error())
+        Err(serde::de::Error::syntax("expect a string"))
     }
 
     ...
@@ -366,7 +498,7 @@ impl serde::Deserialize for PointField {
                 match value {
                     "x" => Ok(Field::X),
                     "y" => Ok(Field::Y),
-                    _ => Err(serde::de::Error::syntax_error()),
+                    _ => Err(serde::de::Error::syntax("expected x or y")),
                 }
             }
         }
@@ -383,7 +515,7 @@ 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)
+        deserializer.visit_struct("Point", PointVisitor)
     }
 }
 
@@ -392,7 +524,9 @@ struct PointVisitor;
 impl serde::de::Visitor for PointVisitor {
     type Value = Point;
 
-    fn visit_map<V>(&mut self, mut visitor: V) -> Result<Point, V::Error>
+    fn visit_struct<V>(&mut self,
+                       _fields: &[&str],
+                       mut visitor: V) -> Result<Point, V::Error>
         where V: serde::de::MapVisitor
     {
         let mut x = None;
@@ -422,3 +556,14 @@ impl serde::de::Visitor for PointVisitor {
     }
 }
 ```
+
+Serialization Formats Using Serde
+=================================
+
+| Format      | Name                                               |
+| ------      | ----                                               |
+| Bincode     | [bincode](https://crates.io/crates/bincode)        |
+| JSON        | [serde\_json](https://crates.io/crates/serde_json) |
+| MessagePack | [rmp](https://crates.io/crates/rmp)                |
+| XML         | [serde\_xml](https://github.com/serde-rs/xml)      |
+| YAML        | [serde\_yaml](https://github.com/serde-rs/yaml/)   |

serde/Cargo.toml

@@ -1,13 +1,17 @@
 [package]
 name = "serde"
-version = "0.4.1"
+version = "0.5.2"
 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"
+documentation = "https://serde-rs.github.io/serde/serde/serde/index.html"
 readme = "../README.md"
-keywords = ["serialization"]
+keywords = ["serde", "serialization"]
 
 [dependencies]
 num = "*"
+
+[features]
+nightly = []
+

serde/src/de/impls.rs

@@ -1,4 +1,15 @@
-use std::collections::{BTreeMap, BTreeSet, HashMap, HashSet};
+use std::borrow::Cow;
+use std::collections::{
+    BinaryHeap,
+    BTreeMap,
+    BTreeSet,
+    LinkedList,
+    HashMap,
+    HashSet,
+    VecDeque,
+};
+#[cfg(feature = "nightly")]
+use collections::enum_set::{CLike, EnumSet};
 use std::hash::Hash;
 use std::marker::PhantomData;
 use std::path;
@@ -8,12 +19,21 @@ use std::sync::Arc;
 
 use num::FromPrimitive;
 
+#[cfg(feature = "nightly")]
+use core::nonzero::{NonZero, Zeroable};
+
+#[cfg(feature = "nightly")]
+use std::num::Zero;
+
 use de::{
     Deserialize,
     Deserializer,
+    EnumVisitor,
     Error,
     MapVisitor,
     SeqVisitor,
+    Type,
+    VariantVisitor,
     Visitor,
 };
 
@@ -41,13 +61,13 @@ impl Deserialize for () {
     fn deserialize<D>(deserializer: &mut D) -> Result<(), D::Error>
         where D: Deserializer,
     {
-        deserializer.visit(UnitVisitor)
+        deserializer.visit_unit(UnitVisitor)
     }
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
-struct BoolVisitor;
+pub struct BoolVisitor;
 
 impl Visitor for BoolVisitor {
     type Value = bool;
@@ -64,7 +84,7 @@ impl Visitor for BoolVisitor {
         match s.trim() {
             "true" => Ok(true),
             "false" => Ok(false),
-            _ => Err(Error::syntax_error()),
+            _ => Err(Error::type_mismatch(Type::Bool)),
         }
     }
 }
@@ -73,21 +93,21 @@ impl Deserialize for bool {
     fn deserialize<D>(deserializer: &mut D) -> Result<bool, D::Error>
         where D: Deserializer,
     {
-        deserializer.visit(BoolVisitor)
+        deserializer.visit_bool(BoolVisitor)
     }
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
 macro_rules! impl_deserialize_num_method {
-    ($src_ty:ty, $method:ident, $from_method:ident) => {
+    ($src_ty:ty, $method:ident, $from_method:ident, $ty:expr) => {
         #[inline]
         fn $method<E>(&mut self, v: $src_ty) -> Result<T, E>
             where E: Error,
         {
             match FromPrimitive::$from_method(v) {
                 Some(v) => Ok(v),
-                None => Err(Error::syntax_error()),
+                None => Err(Error::type_mismatch($ty)),
             }
         }
     }
@@ -111,52 +131,52 @@ impl<
 > Visitor for PrimitiveVisitor<T> {
     type Value = T;
 
-    impl_deserialize_num_method!(isize, visit_isize, from_isize);
-    impl_deserialize_num_method!(i8, visit_i8, from_i8);
-    impl_deserialize_num_method!(i16, visit_i16, from_i16);
-    impl_deserialize_num_method!(i32, visit_i32, from_i32);
-    impl_deserialize_num_method!(i64, visit_i64, from_i64);
-    impl_deserialize_num_method!(usize, visit_usize, from_usize);
-    impl_deserialize_num_method!(u8, visit_u8, from_u8);
-    impl_deserialize_num_method!(u16, visit_u16, from_u16);
-    impl_deserialize_num_method!(u32, visit_u32, from_u32);
-    impl_deserialize_num_method!(u64, visit_u64, from_u64);
-    impl_deserialize_num_method!(f32, visit_f32, from_f32);
-    impl_deserialize_num_method!(f64, visit_f64, from_f64);
+    impl_deserialize_num_method!(isize, visit_isize, from_isize, Type::Isize);
+    impl_deserialize_num_method!(i8, visit_i8, from_i8, Type::I8);
+    impl_deserialize_num_method!(i16, visit_i16, from_i16, Type::I16);
+    impl_deserialize_num_method!(i32, visit_i32, from_i32, Type::I32);
+    impl_deserialize_num_method!(i64, visit_i64, from_i64, Type::I64);
+    impl_deserialize_num_method!(usize, visit_usize, from_usize, Type::Usize);
+    impl_deserialize_num_method!(u8, visit_u8, from_u8, Type::U8);
+    impl_deserialize_num_method!(u16, visit_u16, from_u16, Type::U16);
+    impl_deserialize_num_method!(u32, visit_u32, from_u32, Type::U32);
+    impl_deserialize_num_method!(u64, visit_u64, from_u64, Type::U64);
+    impl_deserialize_num_method!(f32, visit_f32, from_f32, Type::F32);
+    impl_deserialize_num_method!(f64, visit_f64, from_f64, Type::F64);
 
     #[inline]
     fn visit_str<E>(&mut self, v: &str) -> Result<T, E>
         where E: Error,
     {
-        str::FromStr::from_str(v.trim()).or(Err(Error::syntax_error()))
+        str::FromStr::from_str(v.trim()).or(Err(Error::type_mismatch(Type::Str)))
     }
 }
 
 macro_rules! impl_deserialize_num {
-    ($ty:ty) => {
+    ($ty:ty, $method:ident) => {
         impl Deserialize for $ty {
             #[inline]
             fn deserialize<D>(deserializer: &mut D) -> Result<$ty, D::Error>
                 where D: Deserializer,
             {
-                deserializer.visit(PrimitiveVisitor::new())
+                deserializer.$method(PrimitiveVisitor::new())
             }
         }
     }
 }
 
-impl_deserialize_num!(isize);
-impl_deserialize_num!(i8);
-impl_deserialize_num!(i16);
-impl_deserialize_num!(i32);
-impl_deserialize_num!(i64);
-impl_deserialize_num!(usize);
-impl_deserialize_num!(u8);
-impl_deserialize_num!(u16);
-impl_deserialize_num!(u32);
-impl_deserialize_num!(u64);
-impl_deserialize_num!(f32);
-impl_deserialize_num!(f64);
+impl_deserialize_num!(isize, visit_isize);
+impl_deserialize_num!(i8, visit_i8);
+impl_deserialize_num!(i16, visit_i16);
+impl_deserialize_num!(i32, visit_i32);
+impl_deserialize_num!(i64, visit_i64);
+impl_deserialize_num!(usize, visit_usize);
+impl_deserialize_num!(u8, visit_u8);
+impl_deserialize_num!(u16, visit_u16);
+impl_deserialize_num!(u32, visit_u32);
+impl_deserialize_num!(u64, visit_u64);
+impl_deserialize_num!(f32, visit_f32);
+impl_deserialize_num!(f64, visit_f64);
 
 ///////////////////////////////////////////////////////////////////////////////
 
@@ -179,12 +199,12 @@ impl Visitor for CharVisitor {
         let mut iter = v.chars();
         if let Some(v) = iter.next() {
             if iter.next().is_some() {
-                Err(Error::syntax_error())
+                Err(Error::type_mismatch(Type::Char))
             } else {
                 Ok(v)
             }
         } else {
-            Err(Error::end_of_stream_error())
+            Err(Error::end_of_stream())
         }
     }
 }
@@ -194,7 +214,7 @@ impl Deserialize for char {
     fn deserialize<D>(deserializer: &mut D) -> Result<char, D::Error>
         where D: Deserializer,
     {
-        deserializer.visit(CharVisitor)
+        deserializer.visit_char(CharVisitor)
     }
 }
 
@@ -222,7 +242,7 @@ impl Visitor for StringVisitor {
     {
         match str::from_utf8(v) {
             Ok(s) => Ok(s.to_string()),
-            Err(_) => Err(Error::syntax_error()),
+            Err(_) => Err(Error::type_mismatch(Type::String)),
         }
     }
 
@@ -231,7 +251,7 @@ impl Visitor for StringVisitor {
     {
         match String::from_utf8(v) {
             Ok(s) => Ok(s),
-            Err(_) => Err(Error::syntax_error()),
+            Err(_) => Err(Error::type_mismatch(Type::String)),
         }
     }
 }
@@ -240,7 +260,7 @@ impl Deserialize for String {
     fn deserialize<D>(deserializer: &mut D) -> Result<String, D::Error>
         where D: Deserializer,
     {
-        deserializer.visit(StringVisitor)
+        deserializer.visit_string(StringVisitor)
     }
 }
 
@@ -280,159 +300,131 @@ impl<T> Deserialize for Option<T> where T: Deserialize {
 
 ///////////////////////////////////////////////////////////////////////////////
 
-pub struct BTreeSetVisitor<T> {
-    marker: PhantomData<T>,
-}
+macro_rules! set_impl {
+    (
+        $ty:ty,
+        < $($constraints:ident),* >,
+        $visitor_name:ident,
+        $visitor:ident,
+        $ctor:expr,
+        $with_capacity:expr,
+        $insert:expr
+    ) => {
+        pub struct $visitor_name<T> {
+            marker: PhantomData<T>,
+        }
 
-impl<T> BTreeSetVisitor<T> {
-    pub fn new() -> Self {
-        BTreeSetVisitor {
-            marker: PhantomData,
+        impl<T> $visitor_name<T> {
+            pub fn new() -> Self {
+                $visitor_name {
+                    marker: PhantomData,
+                }
+            }
+        }
+
+        impl<T> Visitor for $visitor_name<T>
+            where T: $($constraints +)*,
+        {
+            type Value = $ty;
+
+            #[inline]
+            fn visit_unit<E>(&mut self) -> Result<$ty, E>
+                where E: Error,
+            {
+                Ok($ctor)
+            }
+
+            #[inline]
+            fn visit_seq<V>(&mut self, mut $visitor: V) -> Result<$ty, V::Error>
+                where V: SeqVisitor,
+            {
+                let mut values = $with_capacity;
+
+                while let Some(value) = try!($visitor.visit()) {
+                    $insert(&mut values, value);
+                }
+
+                try!($visitor.end());
+
+                Ok(values)
+            }
+        }
+
+        impl<T> Deserialize for $ty
+            where T: $($constraints +)*,
+        {
+            fn deserialize<D>(deserializer: &mut D) -> Result<$ty, D::Error>
+                where D: Deserializer,
+            {
+                deserializer.visit_seq($visitor_name::new())
+            }
         }
     }
 }
 
-impl<T> Visitor for BTreeSetVisitor<T>
-    where T: Deserialize + Eq + Ord,
-{
-    type Value = BTreeSet<T>;
+set_impl!(
+    BinaryHeap<T>,
+    <Deserialize, Ord>,
+    BinaryHeapVisitor,
+    visitor,
+    BinaryHeap::new(),
+    BinaryHeap::with_capacity(visitor.size_hint().0),
+    BinaryHeap::push);
 
-    #[inline]
-    fn visit_unit<E>(&mut self) -> Result<BTreeSet<T>, E>
-        where E: Error,
-    {
-        Ok(BTreeSet::new())
-    }
+set_impl!(
+    BTreeSet<T>,
+    <Deserialize, Eq, Ord>,
+    BTreeSetVisitor,
+    visitor,
+    BTreeSet::new(),
+    BTreeSet::new(),
+    BTreeSet::insert);
 
-    #[inline]
-    fn visit_seq<V>(&mut self, mut visitor: V) -> Result<BTreeSet<T>, V::Error>
-        where V: SeqVisitor,
-    {
-        let mut values = BTreeSet::new();
+#[cfg(feature = "nightly")]
+set_impl!(
+    EnumSet<T>,
+    <Deserialize, CLike>,
+    EnumSetVisitor,
+    visitor,
+    EnumSet::new(),
+    EnumSet::new(),
+    EnumSet::insert);
 
-        while let Some(value) = try!(visitor.visit()) {
-            values.insert(value);
-        }
+set_impl!(
+    LinkedList<T>,
+    <Deserialize>,
+    LinkedListVisitor,
+    visitor,
+    LinkedList::new(),
+    LinkedList::new(),
+    LinkedList::push_back);
 
-        try!(visitor.end());
+set_impl!(
+    HashSet<T>,
+    <Deserialize, Eq, Hash>,
+    HashSetVisitor,
+    visitor,
+    HashSet::new(),
+    HashSet::with_capacity(visitor.size_hint().0),
+    HashSet::insert);
 
-        Ok(values)
-    }
-}
+set_impl!(
+    Vec<T>,
+    <Deserialize>,
+    VecVisitor,
+    visitor,
+    Vec::new(),
+    Vec::with_capacity(visitor.size_hint().0),
+    Vec::push);
 
-impl<T> Deserialize for BTreeSet<T>
-    where T: Deserialize + Eq + Ord,
-{
-    fn deserialize<D>(deserializer: &mut D) -> Result<BTreeSet<T>, D::Error>
-        where D: Deserializer,
-    {
-        deserializer.visit(BTreeSetVisitor::new())
-    }
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-pub struct HashSetVisitor<T> {
-    marker: PhantomData<T>,
-}
-
-impl<T> HashSetVisitor<T> {
-    pub fn new() -> Self {
-        HashSetVisitor {
-            marker: PhantomData,
-        }
-    }
-}
-
-impl<T> Visitor for HashSetVisitor<T>
-    where T: Deserialize + Eq + Hash,
-{
-    type Value = HashSet<T>;
-
-    #[inline]
-    fn visit_unit<E>(&mut self) -> Result<HashSet<T>, E>
-        where E: Error,
-    {
-        Ok(HashSet::new())
-    }
-
-    #[inline]
-    fn visit_seq<V>(&mut self, mut visitor: V) -> Result<HashSet<T>, V::Error>
-        where V: SeqVisitor,
-    {
-        let (len, _) = visitor.size_hint();
-        let mut values = HashSet::with_capacity(len);
-
-        while let Some(value) = try!(visitor.visit()) {
-            values.insert(value);
-        }
-
-        try!(visitor.end());
-
-        Ok(values)
-    }
-}
-
-impl<T> Deserialize for HashSet<T>
-    where T: Deserialize + Eq + Hash,
-{
-    fn deserialize<D>(deserializer: &mut D) -> Result<HashSet<T>, D::Error>
-        where D: Deserializer,
-    {
-        deserializer.visit(HashSetVisitor::new())
-    }
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-pub struct VecVisitor<T> {
-    marker: PhantomData<T>,
-}
-
-impl<T> VecVisitor<T> {
-    pub fn new() -> Self {
-        VecVisitor {
-            marker: PhantomData,
-        }
-    }
-}
-
-impl<T> Visitor for VecVisitor<T> where T: Deserialize {
-    type Value = Vec<T>;
-
-    #[inline]
-    fn visit_unit<E>(&mut self) -> Result<Vec<T>, E>
-        where E: Error,
-    {
-        Ok(Vec::new())
-    }
-
-    #[inline]
-    fn visit_seq<V>(&mut self, mut visitor: V) -> Result<Vec<T>, V::Error>
-        where V: SeqVisitor,
-    {
-        let (len, _) = visitor.size_hint();
-        let mut values = Vec::with_capacity(len);
-
-        while let Some(value) = try!(visitor.visit()) {
-            values.push(value);
-        }
-
-        try!(visitor.end());
-
-        Ok(values)
-    }
-}
-
-impl<T> Deserialize for Vec<T>
-    where T: Deserialize,
-{
-    fn deserialize<D>(deserializer: &mut D) -> Result<Vec<T>, D::Error>
-        where D: Deserializer,
-    {
-        deserializer.visit_seq(VecVisitor::new())
-    }
-}
+set_impl!(
+    VecDeque<T>,
+    <Deserialize>,
+    VecDequeVisitor,
+    visitor,
+    VecDeque::new(),
+    VecDeque::with_capacity(visitor.size_hint().0),
+    VecDeque::push_back);
 
 ///////////////////////////////////////////////////////////////////////////////
 
@@ -473,7 +465,7 @@ impl<T> Deserialize for [T; 0]
     fn deserialize<D>(deserializer: &mut D) -> Result<[T; 0], D::Error>
         where D: Deserializer,
     {
-        deserializer.visit(ArrayVisitor0::new())
+        deserializer.visit_seq(ArrayVisitor0::new())
     }
 }
 
@@ -502,7 +494,7 @@ macro_rules! array_impls {
                     $(
                         let $name = match try!(visitor.visit()) {
                             Some(val) => val,
-                            None => { return Err(Error::end_of_stream_error()); }
+                            None => { return Err(Error::end_of_stream()); }
                         };
                     )+;
 
@@ -518,7 +510,7 @@ macro_rules! array_impls {
                 fn deserialize<D>(deserializer: &mut D) -> Result<[T; $len], D::Error>
                     where D: Deserializer,
                 {
-                    deserializer.visit($visitor::new())
+                    deserializer.visit_seq($visitor::new())
                 }
             }
         )+
@@ -572,12 +564,21 @@ array_impls! {
 
 macro_rules! tuple_impls {
     () => {};
-    ($($visitor:ident => ($($name:ident),+),)+) => {
+    ($($len:expr => $visitor:ident => ($($name:ident),+),)+) => {
         $(
-            struct $visitor<$($name,)+> {
+            pub struct $visitor<$($name,)+> {
                 marker: PhantomData<($($name,)+)>,
             }
 
+            impl<
+                $($name: Deserialize,)+
+            > $visitor<$($name,)+> {
+                pub fn new() -> Self {
+                    $visitor { marker: PhantomData }
+                }
+            }
+
+
             impl<
                 $($name: Deserialize,)+
             > Visitor for $visitor<$($name,)+> {
@@ -591,7 +592,7 @@ macro_rules! tuple_impls {
                     $(
                         let $name = match try!(visitor.visit()) {
                             Some(value) => value,
-                            None => { return Err(Error::end_of_stream_error()); }
+                            None => { return Err(Error::end_of_stream()); }
                         };
                      )+;
 
@@ -608,7 +609,7 @@ macro_rules! tuple_impls {
                 fn deserialize<D>(deserializer: &mut D) -> Result<($($name,)+), D::Error>
                     where D: Deserializer,
                 {
-                    deserializer.visit_seq($visitor { marker: PhantomData })
+                    deserializer.visit_tuple($len, $visitor::new())
                 }
             }
         )+
@@ -616,187 +617,103 @@ macro_rules! tuple_impls {
 }
 
 tuple_impls! {
-    TupleVisitor1 => (T0),
-    TupleVisitor2 => (T0, T1),
-    TupleVisitor3 => (T0, T1, T2),
-    TupleVisitor4 => (T0, T1, T2, T3),
-    TupleVisitor5 => (T0, T1, T2, T3, T4),
-    TupleVisitor6 => (T0, T1, T2, T3, T4, T5),
-    TupleVisitor7 => (T0, T1, T2, T3, T4, T5, T6),
-    TupleVisitor8 => (T0, T1, T2, T3, T4, T5, T6, T7),
-    TupleVisitor9 => (T0, T1, T2, T3, T4, T5, T6, T7, T8),
-    TupleVisitor10 => (T0, T1, T2, T3, T4, T5, T6, T7, T8, T9),
-    TupleVisitor11 => (T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10),
-    TupleVisitor12 => (T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11),
+    1 => TupleVisitor1 => (T0),
+    2 => TupleVisitor2 => (T0, T1),
+    3 => TupleVisitor3 => (T0, T1, T2),
+    4 => TupleVisitor4 => (T0, T1, T2, T3),
+    5 => TupleVisitor5 => (T0, T1, T2, T3, T4),
+    6 => TupleVisitor6 => (T0, T1, T2, T3, T4, T5),
+    7 => TupleVisitor7 => (T0, T1, T2, T3, T4, T5, T6),
+    8 => TupleVisitor8 => (T0, T1, T2, T3, T4, T5, T6, T7),
+    9 => TupleVisitor9 => (T0, T1, T2, T3, T4, T5, T6, T7, T8),
+    10 => TupleVisitor10 => (T0, T1, T2, T3, T4, T5, T6, T7, T8, T9),
+    11 => TupleVisitor11 => (T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10),
+    12 => TupleVisitor12 => (T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11),
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
-pub struct BTreeMapVisitor<K, V> {
-    marker: PhantomData<BTreeMap<K, V>>,
-}
+macro_rules! map_impl {
+    (
+        $ty:ty,
+        < $($constraints:ident),* >,
+        $visitor_name:ident,
+        $visitor:ident,
+        $ctor:expr,
+        $with_capacity:expr,
+        $insert:expr
+    ) => {
+        pub struct $visitor_name<K, V> {
+            marker: PhantomData<$ty>,
+        }
 
-impl<K, V> BTreeMapVisitor<K, V> {
-    #[inline]
-    pub fn new() -> Self {
-        BTreeMapVisitor {
-            marker: PhantomData,
+        impl<K, V> $visitor_name<K, V> {
+            pub fn new() -> Self {
+                $visitor_name {
+                    marker: PhantomData,
+                }
+            }
+        }
+
+        impl<K, V> Visitor for $visitor_name<K, V>
+            where K: $($constraints +)*,
+                  V: Deserialize,
+        {
+            type Value = $ty;
+
+            #[inline]
+            fn visit_unit<E>(&mut self) -> Result<$ty, E>
+                where E: Error,
+            {
+                Ok($ctor)
+            }
+
+            #[inline]
+            fn visit_map<Visitor>(&mut self, mut $visitor: Visitor) -> Result<$ty, Visitor::Error>
+                where Visitor: MapVisitor,
+            {
+                let mut values = $with_capacity;
+
+                while let Some((key, value)) = try!($visitor.visit()) {
+                    $insert(&mut values, key, value);
+                }
+
+                try!($visitor.end());
+
+                Ok(values)
+            }
+        }
+
+        impl<K, V> Deserialize for $ty
+            where K: $($constraints +)*,
+                  V: Deserialize,
+        {
+            fn deserialize<D>(deserializer: &mut D) -> Result<$ty, D::Error>
+                where D: Deserializer,
+            {
+                deserializer.visit_map($visitor_name::new())
+            }
         }
     }
 }
 
-impl<K, V> Visitor for BTreeMapVisitor<K, V>
-    where K: Deserialize + Ord,
-          V: Deserialize
-{
-    type Value = BTreeMap<K, V>;
+map_impl!(
+    BTreeMap<K, V>,
+    <Deserialize, Eq, Ord>,
+    BTreeMapVisitor,
+    visitor,
+    BTreeMap::new(),
+    BTreeMap::new(),
+    BTreeMap::insert);
 
-    #[inline]
-    fn visit_unit<E>(&mut self) -> Result<BTreeMap<K, V>, E>
-        where E: Error,
-    {
-        Ok(BTreeMap::new())
-    }
-
-    #[inline]
-    fn visit_map<Visitor>(&mut self, mut visitor: Visitor) -> Result<BTreeMap<K, V>, Visitor::Error>
-        where Visitor: MapVisitor,
-    {
-        let mut values = BTreeMap::new();
-
-        while let Some((key, value)) = try!(visitor.visit()) {
-            values.insert(key, value);
-        }
-
-        try!(visitor.end());
-
-        Ok(values)
-    }
-}
-
-impl<K, V> Deserialize for BTreeMap<K, V>
-    where K: Deserialize + Eq + Ord,
-          V: Deserialize,
-{
-    fn deserialize<D>(deserializer: &mut D) -> Result<BTreeMap<K, V>, D::Error>
-        where D: Deserializer,
-    {
-        deserializer.visit(BTreeMapVisitor::new())
-    }
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-pub struct HashMapVisitor<K, V> {
-    marker: PhantomData<HashMap<K, V>>,
-}
-
-impl<K, V> HashMapVisitor<K, V> {
-    #[inline]
-    pub fn new() -> Self {
-        HashMapVisitor {
-            marker: PhantomData,
-        }
-    }
-}
-
-impl<K, V> Visitor for HashMapVisitor<K, V>
-    where K: Deserialize + Eq + Hash,
-          V: Deserialize,
-{
-    type Value = HashMap<K, V>;
-
-    #[inline]
-    fn visit_unit<E>(&mut self) -> Result<HashMap<K, V>, E>
-        where E: Error,
-    {
-        Ok(HashMap::new())
-    }
-
-    #[inline]
-    fn visit_map<V_>(&mut self, mut visitor: V_) -> Result<HashMap<K, V>, V_::Error>
-        where V_: MapVisitor,
-    {
-        let (len, _) = visitor.size_hint();
-        let mut values = HashMap::with_capacity(len);
-
-        while let Some((key, value)) = try!(visitor.visit()) {
-            values.insert(key, value);
-        }
-
-        try!(visitor.end());
-
-        Ok(values)
-    }
-}
-
-impl<K, V> Deserialize for HashMap<K, V>
-    where K: Deserialize + Eq + Hash,
-          V: Deserialize,
-{
-    fn deserialize<D>(deserializer: &mut D) -> Result<HashMap<K, V>, D::Error>
-        where D: Deserializer,
-    {
-        deserializer.visit(HashMapVisitor::new())
-    }
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-// FIXME: `VecMap` is unstable.
-/*
-pub struct VecMapVisitor<V> {
-    marker: PhantomData<VecMap<V>>,
-}
-
-impl<V> VecMapVisitor<V> {
-    #[inline]
-    pub fn new() -> Self {
-        VecMapVisitor {
-            marker: PhantomData,
-        }
-    }
-}
-
-impl<V> Visitor for VecMapVisitor<V>
-    where V: Deserialize,
-{
-    type Value = VecMap<V>;
-
-    #[inline]
-    fn visit_unit<E>(&mut self) -> Result<VecMap<V>, E>
-        where E: Error,
-    {
-        Ok(VecMap::new())
-    }
-
-    #[inline]
-    fn visit_map<V_>(&mut self, mut visitor: V_) -> Result<VecMap<V>, V_::Error>
-        where V_: MapVisitor,
-    {
-        let (len, _) = visitor.size_hint();
-        let mut values = VecMap::with_capacity(len);
-
-        while let Some((key, value)) = try!(visitor.visit()) {
-            values.insert(key, value);
-        }
-
-        try!(visitor.end());
-
-        Ok(values)
-    }
-}
-
-impl<V> Deserialize for VecMap<V>
-    where V: Deserialize,
-{
-    fn deserialize<D>(deserializer: &mut D) -> Result<VecMap<V>, D::Error>
-        where D: Deserializer,
-    {
-        deserializer.visit(VecMapVisitor::new())
-    }
-}
-*/
+map_impl!(
+    HashMap<K, V>,
+    <Deserialize, Eq, Hash>,
+    HashMapVisitor,
+    visitor,
+    HashMap::new(),
+    HashMap::with_capacity(visitor.size_hint().0),
+    HashMap::insert);
 
 ///////////////////////////////////////////////////////////////////////////////
 
@@ -854,3 +771,113 @@ impl<T: Deserialize> Deserialize for Rc<T> {
         Ok(Rc::new(val))
     }
 }
+
+impl<'a, T: ?Sized> Deserialize for Cow<'a, T> where T: ToOwned, T::Owned: Deserialize, {
+    #[inline]
+    fn deserialize<D>(deserializer: &mut D) -> Result<Cow<'a, T>, D::Error>
+        where D: Deserializer,
+    {
+        let val = try!(Deserialize::deserialize(deserializer));
+        Ok(Cow::Owned(val))
+    }
+}
+
+///////////////////////////////////////////////////////////////////////////////
+
+#[cfg(feature = "nightly")]
+impl<T> Deserialize for NonZero<T> where T: Deserialize + PartialEq + Zeroable + Zero {
+    fn deserialize<D>(deserializer: &mut D) -> Result<NonZero<T>, D::Error> where D: Deserializer {
+        let value = try!(Deserialize::deserialize(deserializer));
+        if value == Zero::zero() {
+            return Err(Error::syntax("expected a non-zero value"))
+        }
+        unsafe {
+            Ok(NonZero::new(value))
+        }
+    }
+}
+
+///////////////////////////////////////////////////////////////////////////////
+
+
+impl<T, E> Deserialize for Result<T, E> where T: Deserialize, E: Deserialize {
+    fn deserialize<D>(deserializer: &mut D) -> Result<Result<T, E>, D::Error>
+                      where D: Deserializer {
+        enum Field {
+            Ok,
+            Err,
+        }
+
+        impl Deserialize for Field {
+            #[inline]
+            fn deserialize<D>(deserializer: &mut D) -> Result<Field, D::Error>
+                where D: Deserializer
+            {
+                struct FieldVisitor;
+
+                impl ::de::Visitor for FieldVisitor {
+                    type Value = Field;
+
+                    fn visit_usize<E>(&mut self, value: usize) -> Result<Field, E> where E: Error {
+                        match value {
+                            0 => Ok(Field::Ok),
+                            1 => Ok(Field::Err),
+                            _ => Err(Error::unknown_field(&value.to_string())),
+                        }
+                    }
+
+                    fn visit_str<E>(&mut self, value: &str) -> Result<Field, E> where E: Error {
+                        match value {
+                            "Ok" => Ok(Field::Ok),
+                            "Err" => Ok(Field::Err),
+                            _ => Err(Error::unknown_field(value)),
+                        }
+                    }
+
+                    fn visit_bytes<E>(&mut self, value: &[u8]) -> Result<Field, E> where E: Error {
+                        match value {
+                            b"Ok" => Ok(Field::Ok),
+                            b"Err" => Ok(Field::Err),
+                            _ => {
+                                match str::from_utf8(value) {
+                                    Ok(value) => Err(Error::unknown_field(value)),
+                                    Err(_) => Err(Error::type_mismatch(Type::String)),
+                                }
+                            }
+                        }
+                    }
+                }
+
+                deserializer.visit(FieldVisitor)
+            }
+        }
+
+        struct Visitor<T, E>(PhantomData<Result<T, E>>);
+
+        impl<T, E> EnumVisitor for Visitor<T, E>
+            where T: Deserialize,
+                  E: Deserialize
+        {
+            type Value = Result<T, E>;
+
+            fn visit<V>(&mut self, mut visitor: V) -> Result<Result<T, E>, V::Error>
+                where V: VariantVisitor
+            {
+                match try!(visitor.visit_variant()) {
+                    Field::Ok => {
+                        let value = try!(visitor.visit_newtype());
+                        Ok(Ok(value))
+                    }
+                    Field::Err => {
+                        let value = try!(visitor.visit_newtype());
+                        Ok(Err(value))
+                    }
+                }
+            }
+        }
+
+        const VARIANTS: &'static [&'static str] = &["Ok", "Err"];
+
+        deserializer.visit_enum("Result", VARIANTS, Visitor(PhantomData))
+    }
+}

serde/src/de/mod.rs

@@ -5,14 +5,65 @@ pub mod value;
 
 ///////////////////////////////////////////////////////////////////////////////
 
-pub trait Error {
-    fn syntax_error() -> Self;
+/// `Error` is a trait that allows a `Deserialize` to generically create a
+/// `Deserializer` error.
+pub trait Error: Sized {
+    /// Raised when there is general error when deserializing a type.
+    fn syntax(msg: &str) -> Self;
 
-    fn end_of_stream_error() -> Self;
+    /// Raised when a fixed sized sequence or map was passed in the wrong amount of arguments.
+    fn length_mismatch(_len: usize) -> Self {
+        Error::syntax("incorrect length")
+    }
 
-    fn unknown_field_error(field: &str) -> Self;
+    /// Raised when a `Deserialize` was passed an incorrect type.
+    fn type_mismatch(_type: Type) -> Self {
+        Error::syntax("incorrect type")
+    }
 
-    fn missing_field_error(field: &'static str) -> Self;
+    /// Raised when a `Deserialize` type unexpectedly hit the end of the stream.
+    fn end_of_stream() -> Self;
+
+    /// Raised when a `Deserialize` struct type received an unexpected struct field.
+    fn unknown_field(field: &str) -> Self;
+
+    /// Raised when a `Deserialize` struct type did not receive a field.
+    fn missing_field(field: &'static str) -> Self;
+}
+
+/// `Type` represents all the primitive types that can be deserialized. This is used by
+/// `Error::kind_mismatch`.
+pub enum Type {
+    Bool,
+    Usize,
+    U8,
+    U16,
+    U32,
+    U64,
+    Isize,
+    I8,
+    I16,
+    I32,
+    I64,
+    F32,
+    F64,
+    Char,
+    Str,
+    String,
+    Unit,
+    Option,
+    Seq,
+    Map,
+    UnitStruct,
+    NewtypeStruct,
+    TupleStruct,
+    Struct,
+    Tuple,
+    Enum,
+    StructVariant,
+    TupleVariant,
+    UnitVariant,
+    Bytes,
 }
 
 ///////////////////////////////////////////////////////////////////////////////
@@ -25,18 +76,164 @@ pub trait Deserialize {
 
 ///////////////////////////////////////////////////////////////////////////////
 
-/// `Deserializer` is an abstract trait that can deserialize values into a `Visitor`.
+/// `Deserializer` is a trait that can deserialize values by threading a `Visitor` trait through a
+/// value. It supports two entry point styles which enables different kinds of deserialization.
+///
+/// 1) The `visit` method. File formats like JSON embed the type of it's construct in it's file
+///    format. This allows the `Deserializer` to deserialize into a generic type like
+///    `json::Value`, which can represent all JSON types.
+///
+/// 2) The `visit_*` methods. File formats like bincode do not embed in it's format how to decode
+///    it's values. It relies instead on the `Deserialize` type to hint to the `Deserializer` with
+///    the `visit_*` methods how it should parse the next value. One downside though to only
+///    supporting the `visit_*` types is that it does not allow for deserializing into a generic
+///    `json::Value`-esque type.
 pub trait Deserializer {
     type Error: Error;
 
-    /// The `visit` method walks a visitor through a value as it is being deserialized.
+    /// This method walks a visitor through a value as it is being deserialized.
     fn visit<V>(&mut self, visitor: V) -> Result<V::Value, Self::Error>
         where V: Visitor;
 
-    /// The `visit_option` method allows a `Deserialize` type to inform the `Deserializer` that
-    /// it's expecting an optional value. This allows deserializers that encode an optional value
-    /// as a nullable value to convert the null value into a `None`, and a regular value as
-    /// `Some(value)`.
+    /// This method hints that the `Deserialize` type is expecting a `bool` value.
+    #[inline]
+    fn visit_bool<V>(&mut self, visitor: V) -> Result<V::Value, Self::Error>
+        where V: Visitor,
+    {
+        self.visit(visitor)
+    }
+
+    /// This method hints that the `Deserialize` type is expecting an `usize` value.
+    #[inline]
+    fn visit_usize<V>(&mut self, visitor: V) -> Result<V::Value, Self::Error>
+        where V: Visitor,
+    {
+        self.visit_u64(visitor)
+    }
+
+    /// This method hints that the `Deserialize` type is expecting an `u8` value.
+    #[inline]
+    fn visit_u8<V>(&mut self, visitor: V) -> Result<V::Value, Self::Error>
+        where V: Visitor,
+    {
+        self.visit_u64(visitor)
+    }
+
+    /// This method hints that the `Deserialize` type is expecting an `u16` value.
+    #[inline]
+    fn visit_u16<V>(&mut self, visitor: V) -> Result<V::Value, Self::Error>
+        where V: Visitor,
+    {
+        self.visit_u64(visitor)
+    }
+
+    /// This method hints that the `Deserialize` type is expecting an `u32` value.
+    #[inline]
+    fn visit_u32<V>(&mut self, visitor: V) -> Result<V::Value, Self::Error>
+        where V: Visitor,
+    {
+        self.visit_u64(visitor)
+    }
+
+    /// This method hints that the `Deserialize` type is expecting an `u64` value.
+    #[inline]
+    fn visit_u64<V>(&mut self, visitor: V) -> Result<V::Value, Self::Error>
+        where V: Visitor,
+    {
+        self.visit(visitor)
+    }
+
+    /// This method hints that the `Deserialize` type is expecting an `isize` value.
+    #[inline]
+    fn visit_isize<V>(&mut self, visitor: V) -> Result<V::Value, Self::Error>
+        where V: Visitor,
+    {
+        self.visit_i64(visitor)
+    }
+
+    /// This method hints that the `Deserialize` type is expecting an `i8` value.
+    #[inline]
+    fn visit_i8<V>(&mut self, visitor: V) -> Result<V::Value, Self::Error>
+        where V: Visitor,
+    {
+        self.visit_i64(visitor)
+    }
+
+    /// This method hints that the `Deserialize` type is expecting an `i16` value.
+    #[inline]
+    fn visit_i16<V>(&mut self, visitor: V) -> Result<V::Value, Self::Error>
+        where V: Visitor,
+    {
+        self.visit_i64(visitor)
+    }
+
+    /// This method hints that the `Deserialize` type is expecting an `i32` value.
+    #[inline]
+    fn visit_i32<V>(&mut self, visitor: V) -> Result<V::Value, Self::Error>
+        where V: Visitor,
+    {
+        self.visit_i64(visitor)
+    }
+
+    /// This method hints that the `Deserialize` type is expecting an `i64` value.
+    #[inline]
+    fn visit_i64<V>(&mut self, visitor: V) -> Result<V::Value, Self::Error>
+        where V: Visitor,
+    {
+        self.visit(visitor)
+    }
+
+    /// This method hints that the `Deserialize` type is expecting a `f32` value.
+    #[inline]
+    fn visit_f32<V>(&mut self, visitor: V) -> Result<V::Value, Self::Error>
+        where V: Visitor,
+    {
+        self.visit_f64(visitor)
+    }
+
+    /// This method hints that the `Deserialize` type is expecting a `f64` value.
+    #[inline]
+    fn visit_f64<V>(&mut self, visitor: V) -> Result<V::Value, Self::Error>
+        where V: Visitor,
+    {
+        self.visit(visitor)
+    }
+
+    /// This method hints that the `Deserialize` type is expecting a `char` value.
+    #[inline]
+    fn visit_char<V>(&mut self, visitor: V) -> Result<V::Value, Self::Error>
+        where V: Visitor,
+    {
+        self.visit(visitor)
+    }
+
+    /// This method hints that the `Deserialize` type is expecting a `&str` value.
+    #[inline]
+    fn visit_str<V>(&mut self, visitor: V) -> Result<V::Value, Self::Error>
+        where V: Visitor,
+    {
+        self.visit(visitor)
+    }
+
+    /// This method hints that the `Deserialize` type is expecting a `String` value.
+    #[inline]
+    fn visit_string<V>(&mut self, visitor: V) -> Result<V::Value, Self::Error>
+        where V: Visitor,
+    {
+        self.visit_str(visitor)
+    }
+
+    /// This method hints that the `Deserialize` type is expecting an `unit` value.
+    #[inline]
+    fn visit_unit<V>(&mut self, visitor: V) -> Result<V::Value, Self::Error>
+        where V: Visitor,
+    {
+        self.visit(visitor)
+    }
+
+    /// This method hints that the `Deserialize` type is expecting an `Option` value. This allows
+    /// deserializers that encode an optional value as a nullable value to convert the null value
+    /// into a `None`, and a regular value as `Some(value)`.
     #[inline]
     fn visit_option<V>(&mut self, visitor: V) -> Result<V::Value, Self::Error>
         where V: Visitor,
@@ -44,9 +241,8 @@ pub trait Deserializer {
         self.visit(visitor)
     }
 
-    /// The `visit_seq` method allows a `Deserialize` type to inform the `Deserializer` that it's
-    /// expecting a sequence of values. This allows deserializers to parse sequences that aren't
-    /// tagged as sequences.
+    /// This method hints that the `Deserialize` type is expecting a sequence value. This allows
+    /// deserializers to parse sequences that aren't tagged as sequences.
     #[inline]
     fn visit_seq<V>(&mut self, visitor: V) -> Result<V::Value, Self::Error>
         where V: Visitor,
@@ -54,9 +250,8 @@ pub trait Deserializer {
         self.visit(visitor)
     }
 
-    /// The `visit_map` method allows a `Deserialize` type to inform the `Deserializer` that it's
-    /// expecting a map of values. This allows deserializers to parse sequences that aren't tagged
-    /// as maps.
+    /// This method hints that the `Deserialize` type is expecting a map of values. This allows
+    /// deserializers to parse sequences that aren't tagged as maps.
     #[inline]
     fn visit_map<V>(&mut self, visitor: V) -> Result<V::Value, Self::Error>
         where V: Visitor,
@@ -64,54 +259,82 @@ pub trait Deserializer {
         self.visit(visitor)
     }
 
-    /// The `visit_named_unit` method allows a `Deserialize` type to inform the `Deserializer` that
-    /// it's expecting a named unit. This allows deserializers to a named unit that aren't tagged
-    /// as a named unit.
+    /// This method hints that the `Deserialize` type is expecting a unit struct. This allows
+    /// deserializers to a unit struct that aren't tagged as a unit struct.
     #[inline]
-    fn visit_named_unit<V>(&mut self, _name: &str, visitor: V) -> Result<V::Value, Self::Error>
+    fn visit_unit_struct<V>(&mut self,
+                            _name: &'static str,
+                            visitor: V) -> Result<V::Value, Self::Error>
         where V: Visitor,
     {
-        self.visit(visitor)
+        self.visit_unit(visitor)
     }
 
-    /// The `visit_named_seq` method allows a `Deserialize` type to inform the `Deserializer` that
-    /// it's expecting a named sequence of values. This allows deserializers to parse sequences
-    /// that aren't tagged as sequences.
+    /// This method hints that the `Deserialize` type is expecting a newtype struct. This allows
+    /// deserializers to a newtype struct that aren't tagged as a newtype struct.
     #[inline]
-    fn visit_named_seq<V>(&mut self, _name: &str, visitor: V) -> Result<V::Value, Self::Error>
+    fn visit_newtype_struct<V>(&mut self,
+                               name: &'static str,
+                               visitor: V) -> Result<V::Value, Self::Error>
         where V: Visitor,
     {
-        self.visit_seq(visitor)
+        self.visit_tuple_struct(name, 1, visitor)
     }
 
-    /// The `visit_named_map` method allows a `Deserialize` type to inform the `Deserializer` that
-    /// it's expecting a map of values. This allows deserializers to parse sequences that aren't
-    /// tagged as maps.
+    /// This method hints that the `Deserialize` type is expecting a tuple struct. This allows
+    /// deserializers to parse sequences that aren't tagged as sequences.
     #[inline]
-    fn visit_named_map<V>(&mut self, _name: &str, visitor: V) -> Result<V::Value, Self::Error>
+    fn visit_tuple_struct<V>(&mut self,
+                             _name: &'static str,
+                             len: usize,
+                             visitor: V) -> Result<V::Value, Self::Error>
+        where V: Visitor,
+    {
+        self.visit_tuple(len, visitor)
+    }
+
+    /// This method hints that the `Deserialize` type is expecting a struct. This allows
+    /// deserializers to parse sequences that aren't tagged as maps.
+    #[inline]
+    fn visit_struct<V>(&mut self,
+                       _name: &'static str,
+                       _fields: &'static [&'static str],
+                       visitor: V) -> Result<V::Value, Self::Error>
         where V: Visitor,
     {
         self.visit_map(visitor)
     }
 
-    /// The `visit_enum` method allows a `Deserialize` type to inform the `Deserializer` that it's
-    /// expecting an enum value. This allows deserializers that provide a custom enumeration
-    /// serialization to properly deserialize the type.
+    /// This method hints that the `Deserialize` type is expecting a tuple value. This allows
+    /// deserializers that provide a custom tuple serialization to properly deserialize the type.
     #[inline]
-    fn visit_enum<V>(&mut self, _enum: &str, _visitor: V) -> Result<V::Value, Self::Error>
-        where V: EnumVisitor,
+    fn visit_tuple<V>(&mut self, _len: usize, visitor: V) -> Result<V::Value, Self::Error>
+        where V: Visitor,
     {
-        Err(Error::syntax_error())
+        self.visit_seq(visitor)
     }
 
-    /// The `visit_bytes` method allows a `Deserialize` type to inform the `Deserializer` that it's
-    /// expecting a `Vec<u8>`. This allows deserializers that provide a custom byte vector
-    /// serialization to properly deserialize the type.
+    /// This method hints that the `Deserialize` type is expecting an enum value. This allows
+    /// deserializers that provide a custom enumeration serialization to properly deserialize the
+    /// type.
+    #[inline]
+    fn visit_enum<V>(&mut self,
+                     _enum: &'static str,
+                     _variants: &'static [&'static str],
+                     _visitor: V) -> Result<V::Value, Self::Error>
+        where V: EnumVisitor,
+    {
+        Err(Error::syntax("expected an enum"))
+    }
+
+    /// This method hints that the `Deserialize` type is expecting a `Vec<u8>`. This allows
+    /// deserializers that provide a custom byte vector serialization to properly deserialize the
+    /// type.
     #[inline]
     fn visit_bytes<V>(&mut self, visitor: V) -> Result<V::Value, Self::Error>
         where V: Visitor,
     {
-        self.visit(visitor)
+        self.visit_seq(visitor)
     }
 
     /// Specify a format string for the deserializer.
@@ -132,7 +355,7 @@ pub trait Visitor {
     fn visit_bool<E>(&mut self, _v: bool) -> Result<Self::Value, E>
         where E: Error,
     {
-        Err(Error::syntax_error())
+        Err(Error::type_mismatch(Type::Bool))
     }
 
     fn visit_isize<E>(&mut self, v: isize) -> Result<Self::Value, E>
@@ -162,7 +385,7 @@ pub trait Visitor {
     fn visit_i64<E>(&mut self, _v: i64) -> Result<Self::Value, E>
         where E: Error,
     {
-        Err(Error::syntax_error())
+        Err(Error::type_mismatch(Type::I64))
     }
 
     fn visit_usize<E>(&mut self, v: usize) -> Result<Self::Value, E>
@@ -192,7 +415,7 @@ pub trait Visitor {
     fn visit_u64<E>(&mut self, _v: u64) -> Result<Self::Value, E>
         where E: Error,
     {
-        Err(Error::syntax_error())
+        Err(Error::type_mismatch(Type::U64))
     }
 
     fn visit_f32<E>(&mut self, v: f32) -> Result<Self::Value, E>
@@ -204,7 +427,7 @@ pub trait Visitor {
     fn visit_f64<E>(&mut self, _v: f64) -> Result<Self::Value, E>
         where E: Error,
     {
-        Err(Error::syntax_error())
+        Err(Error::type_mismatch(Type::F64))
     }
 
     #[inline]
@@ -219,7 +442,7 @@ pub trait Visitor {
     fn visit_str<E>(&mut self, _v: &str) -> Result<Self::Value, E>
         where E: Error,
     {
-        Err(Error::syntax_error())
+        Err(Error::type_mismatch(Type::Str))
     }
 
     #[inline]
@@ -232,11 +455,11 @@ pub trait Visitor {
     fn visit_unit<E>(&mut self) -> Result<Self::Value, E>
         where E: Error,
     {
-        Err(Error::syntax_error())
+        Err(Error::type_mismatch(Type::Unit))
     }
 
     #[inline]
-    fn visit_named_unit<E>(&mut self, _name: &str) -> Result<Self::Value, E>
+    fn visit_unit_struct<E>(&mut self, _name: &'static str) -> Result<Self::Value, E>
         where E: Error,
     {
         self.visit_unit()
@@ -245,31 +468,37 @@ pub trait Visitor {
     fn visit_none<E>(&mut self) -> Result<Self::Value, E>
         where E: Error,
     {
-        Err(Error::syntax_error())
+        Err(Error::type_mismatch(Type::Option))
     }
 
     fn visit_some<D>(&mut self, _deserializer: &mut D) -> Result<Self::Value, D::Error>
         where D: Deserializer,
     {
-        Err(Error::syntax_error())
+        Err(Error::type_mismatch(Type::Option))
+    }
+
+    fn visit_newtype_struct<D>(&mut self, _deserializer: &mut D) -> Result<Self::Value, D::Error>
+        where D: Deserializer,
+    {
+        Err(Error::type_mismatch(Type::NewtypeStruct))
     }
 
     fn visit_seq<V>(&mut self, _visitor: V) -> Result<Self::Value, V::Error>
         where V: SeqVisitor,
     {
-        Err(Error::syntax_error())
+        Err(Error::type_mismatch(Type::Seq))
     }
 
     fn visit_map<V>(&mut self, _visitor: V) -> Result<Self::Value, V::Error>
         where V: MapVisitor,
     {
-        Err(Error::syntax_error())
+        Err(Error::type_mismatch(Type::Map))
     }
 
     fn visit_bytes<E>(&mut self, _v: &[u8]) -> Result<Self::Value, E>
         where E: Error,
     {
-        Err(Error::syntax_error())
+        Err(Error::type_mismatch(Type::Bytes))
     }
 
     fn visit_byte_buf<E>(&mut self, v: Vec<u8>) -> Result<Self::Value, E>
@@ -351,7 +580,7 @@ pub trait MapVisitor {
     fn missing_field<V>(&mut self, field: &'static str) -> Result<V, Self::Error>
         where V: Deserialize,
     {
-        Err(Error::missing_field_error(field))
+        Err(Error::missing_field(field))
     }
 }
 
@@ -415,21 +644,35 @@ pub trait VariantVisitor {
 
     /// `visit_unit` is called when deserializing a variant with no values.
     fn visit_unit(&mut self) -> Result<(), Self::Error> {
-        Err(Error::syntax_error())
+        Err(Error::type_mismatch(Type::UnitVariant))
     }
 
-    /// `visit_seq` is called when deserializing a tuple-like variant.
-    fn visit_seq<V>(&mut self, _visitor: V) -> Result<V::Value, Self::Error>
-        where V: Visitor
+    /// `visit_newtype` is called when deserializing a variant with a single value. By default this
+    /// uses the `visit_tuple` method to deserialize the value.
+    #[inline]
+    fn visit_newtype<T>(&mut self) -> Result<T, Self::Error>
+        where T: Deserialize,
     {
-        Err(Error::syntax_error())
+        let (value,) = try!(self.visit_tuple(1, impls::TupleVisitor1::new()));
+        Ok(value)
     }
 
-    /// `visit_map` is called when deserializing a struct-like variant.
-    fn visit_map<V>(&mut self, _visitor: V) -> Result<V::Value, Self::Error>
+    /// `visit_tuple` is called when deserializing a tuple-like variant.
+    fn visit_tuple<V>(&mut self,
+                      _len: usize,
+                      _visitor: V) -> Result<V::Value, Self::Error>
         where V: Visitor
     {
-        Err(Error::syntax_error())
+        Err(Error::type_mismatch(Type::TupleVariant))
+    }
+
+    /// `visit_struct` is called when deserializing a struct-like variant.
+    fn visit_struct<V>(&mut self,
+                       _fields: &'static [&'static str],
+                       _visitor: V) -> Result<V::Value, Self::Error>
+        where V: Visitor
+    {
+        Err(Error::type_mismatch(Type::StructVariant))
     }
 }
 
@@ -446,16 +689,26 @@ impl<'a, T> VariantVisitor for &'a mut T where T: VariantVisitor {
         (**self).visit_unit()
     }
 
-    fn visit_seq<V>(&mut self, visitor: V) -> Result<V::Value, T::Error>
-        where V: Visitor,
+    fn visit_newtype<D>(&mut self) -> Result<D, T::Error>
+        where D: Deserialize,
     {
-        (**self).visit_seq(visitor)
+        (**self).visit_newtype()
     }
 
-    fn visit_map<V>(&mut self, visitor: V) -> Result<V::Value, T::Error>
+    fn visit_tuple<V>(&mut self,
+                      len: usize,
+                      visitor: V) -> Result<V::Value, T::Error>
         where V: Visitor,
     {
-        (**self).visit_map(visitor)
+        (**self).visit_tuple(len, visitor)
+    }
+
+    fn visit_struct<V>(&mut self,
+                    fields: &'static [&'static str],
+                    visitor: V) -> Result<V::Value, T::Error>
+        where V: Visitor,
+    {
+        (**self).visit_struct(fields, visitor)
     }
 }
 

serde/src/de/value.rs

@@ -24,10 +24,10 @@ pub enum Error {
 }
 
 impl de::Error for Error {
-    fn syntax_error() -> Self { Error::SyntaxError }
-    fn end_of_stream_error() -> Self { Error::EndOfStreamError }
-    fn unknown_field_error(field: &str) -> Self { Error::UnknownFieldError(field.to_string()) }
-    fn missing_field_error(field: &'static str) -> Self { Error::MissingFieldError(field) }
+    fn syntax(_: &str) -> Self { Error::SyntaxError }
+    fn end_of_stream() -> Self { Error::EndOfStreamError }
+    fn unknown_field(field: &str) -> Self { Error::UnknownFieldError(String::from(field)) }
+    fn missing_field(field: &'static str) -> Self { Error::MissingFieldError(field) }
 }
 
 ///////////////////////////////////////////////////////////////////////////////
@@ -89,7 +89,7 @@ macro_rules! primitive_deserializer {
             {
                 match self.0.take() {
                     Some(v) => visitor.$method(v),
-                    None => Err(de::Error::end_of_stream_error()),
+                    None => Err(de::Error::end_of_stream()),
                 }
             }
         }
@@ -132,11 +132,14 @@ impl<'a> de::Deserializer for StrDeserializer<'a> {
     {
         match self.0.take() {
             Some(v) => visitor.visit_str(v),
-            None => Err(de::Error::end_of_stream_error()),
+            None => Err(de::Error::end_of_stream()),
         }
     }
 
-    fn visit_enum<V>(&mut self, _name: &str, mut visitor: V) -> Result<V::Value, Error>
+    fn visit_enum<V>(&mut self,
+                     _name: &str,
+                     _variants: &'static [&'static str],
+                     mut visitor: V) -> Result<V::Value, Error>
         where V: de::EnumVisitor,
     {
         visitor.visit(self)
@@ -178,11 +181,14 @@ impl de::Deserializer for StringDeserializer {
     {
         match self.0.take() {
             Some(string) => visitor.visit_string(string),
-            None => Err(de::Error::end_of_stream_error()),
+            None => Err(de::Error::end_of_stream()),
         }
     }
 
-    fn visit_enum<V>(&mut self, _name: &str, mut visitor: V) -> Result<V::Value, Error>
+    fn visit_enum<V>(&mut self,
+                     _name: &str,
+                     _variants: &'static [&'static str],
+                     mut visitor: V) -> Result<V::Value, Error>
         where V: de::EnumVisitor,
     {
         visitor.visit(self)
@@ -255,7 +261,7 @@ impl<I, T> de::SeqVisitor for SeqDeserializer<I>
         if self.len == 0 {
             Ok(())
         } else {
-            Err(de::Error::end_of_stream_error())
+            Err(de::Error::length_mismatch(self.len))
         }
     }
 
@@ -368,7 +374,7 @@ impl<I, K, V> de::MapVisitor for MapDeserializer<I, K, V>
                 let mut de = value.into_deserializer();
                 de::Deserialize::deserialize(&mut de)
             }
-            None => Err(de::Error::syntax_error())
+            None => Err(de::Error::syntax("expected a map value"))
         }
     }
 
@@ -376,7 +382,7 @@ impl<I, K, V> de::MapVisitor for MapDeserializer<I, K, V>
         if self.len == 0 {
             Ok(())
         } else {
-            Err(de::Error::end_of_stream_error())
+            Err(de::Error::length_mismatch(self.len))
         }
     }
 
@@ -432,7 +438,7 @@ impl<'a> de::Deserializer for BytesDeserializer<'a> {
     {
         match self.0.take() {
             Some(bytes) => visitor.visit_bytes(bytes),
-            None => Err(de::Error::end_of_stream_error()),
+            None => Err(de::Error::end_of_stream()),
         }
     }
 }
@@ -459,7 +465,7 @@ impl de::Deserializer for ByteBufDeserializer {
     {
         match self.0.take() {
             Some(bytes) => visitor.visit_byte_buf(bytes),
-            None => Err(de::Error::end_of_stream_error()),
+            None => Err(de::Error::end_of_stream()),
         }
     }
 }

serde/src/lib.rs

@@ -5,15 +5,21 @@
 //! 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://serde-rs.github.io/serde/serde")]
+#![cfg_attr(feature = "nightly", feature(collections, core, enumset, nonzero, step_trait, zero_one))]
 
 extern crate num;
 
+#[cfg(feature = "nightly")]
+extern crate collections;
+
+#[cfg(feature = "nightly")]
+extern crate core;
+
 pub use ser::{Serialize, Serializer};
 pub use de::{Deserialize, Deserializer, Error};
 
 pub mod bytes;
 pub mod de;
 pub mod iter;
-pub mod json;
 pub mod ser;

serde/src/ser/impls.rs

@@ -1,9 +1,29 @@
-use std::collections::{BTreeMap, BTreeSet, HashMap, HashSet};
+use std::borrow::Cow;
+use std::collections::{
+    BinaryHeap,
+    BTreeMap,
+    BTreeSet,
+    LinkedList,
+    HashMap,
+    HashSet,
+    VecDeque,
+};
+#[cfg(feature = "nightly")]
+use collections::enum_set::{CLike, EnumSet};
 use std::hash::Hash;
+#[cfg(feature = "nightly")]
+use std::iter;
+#[cfg(feature = "nightly")]
+use std::num;
+#[cfg(feature = "nightly")]
+use std::ops;
 use std::path;
 use std::rc::Rc;
 use std::sync::Arc;
 
+#[cfg(feature = "nightly")]
+use core::nonzero::{NonZero, Zeroable};
+
 use super::{
     Serialize,
     Serializer,
@@ -75,6 +95,26 @@ impl<T> Serialize for Option<T> where T: Serialize {
     }
 }
 
+impl<T> SeqVisitor for Option<T> where T: Serialize {
+    #[inline]
+    fn visit<S>(&mut self, serializer: &mut S) -> Result<Option<()>, S::Error>
+        where S: Serializer,
+    {
+        match self.take() {
+            Some(value) => {
+                try!(serializer.visit_seq_elt(value));
+                Ok(Some(()))
+            }
+            None => Ok(None),
+        }
+    }
+
+    #[inline]
+    fn len(&self) -> Option<usize> {
+        Some(if self.is_some() { 1 } else { 0 })
+    }
+}
+
 ///////////////////////////////////////////////////////////////////////////////
 
 pub struct SeqIteratorVisitor<Iter> {
@@ -104,8 +144,8 @@ impl<T, Iter> SeqVisitor for SeqIteratorVisitor<Iter>
     {
         match self.iter.next() {
             Some(value) => {
-                let value = try!(serializer.visit_seq_elt(value));
-                Ok(Some(value))
+                try!(serializer.visit_seq_elt(value));
+                Ok(Some(()))
             }
             None => Ok(None),
         }
@@ -119,7 +159,7 @@ impl<T, Iter> SeqVisitor for SeqIteratorVisitor<Iter>
 
 ///////////////////////////////////////////////////////////////////////////////
 
-impl<'a, T> Serialize for &'a [T]
+impl<T> Serialize for [T]
     where T: Serialize,
 {
     #[inline]
@@ -177,12 +217,16 @@ array_impls!(30);
 array_impls!(31);
 array_impls!(32);
 
-impl<T> Serialize for Vec<T> where T: Serialize {
+///////////////////////////////////////////////////////////////////////////////
+
+impl<T> Serialize for BinaryHeap<T>
+    where T: Serialize + Ord
+{
     #[inline]
     fn serialize<S>(&self, serializer: &mut S) -> Result<(), S::Error>
         where S: Serializer,
     {
-        (&self[..]).serialize(serializer)
+        serializer.visit_seq(SeqIteratorVisitor::new(self.iter(), Some(self.len())))
     }
 }
 
@@ -197,6 +241,18 @@ impl<T> Serialize for BTreeSet<T>
     }
 }
 
+#[cfg(feature = "nightly")]
+impl<T> Serialize for EnumSet<T>
+    where T: Serialize + CLike
+{
+    #[inline]
+    fn serialize<S>(&self, serializer: &mut S) -> Result<(), S::Error>
+        where S: Serializer,
+    {
+        serializer.visit_seq(SeqIteratorVisitor::new(self.iter(), Some(self.len())))
+    }
+}
+
 impl<T> Serialize for HashSet<T>
     where T: Serialize + Eq + Hash,
 {
@@ -208,6 +264,49 @@ impl<T> Serialize for HashSet<T>
     }
 }
 
+impl<T> Serialize for LinkedList<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())))
+    }
+}
+
+#[cfg(feature = "nightly")]
+impl<A> Serialize for ops::Range<A>
+    where A: Serialize + Clone + iter::Step + num::One,
+          for<'a> &'a A: ops::Add<&'a A, Output = A>,
+{
+    #[inline]
+    fn serialize<S>(&self, serializer: &mut S) -> Result<(), S::Error>
+        where S: Serializer,
+    {
+        let len = iter::Step::steps_between(&self.start, &self.end, &A::one());
+        serializer.visit_seq(SeqIteratorVisitor::new(self.clone(), len))
+    }
+}
+
+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 VecDeque<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())))
+    }
+}
+
 ///////////////////////////////////////////////////////////////////////////////
 
 impl Serialize for () {
@@ -257,7 +356,7 @@ macro_rules! tuple_impls {
                         $(
                             $state => {
                                 self.state += 1;
-                                Ok(Some(try!(serializer.visit_seq_elt(&e!(self.tuple.$idx)))))
+                                Ok(Some(try!(serializer.visit_tuple_elt(&e!(self.tuple.$idx)))))
                             }
                         )+
                         _ => {
@@ -276,7 +375,7 @@ macro_rules! tuple_impls {
             {
                 #[inline]
                 fn serialize<S: Serializer>(&self, serializer: &mut S) -> Result<(), S::Error> {
-                    serializer.visit_seq($TupleVisitor::new(self))
+                    serializer.visit_tuple($TupleVisitor::new(self))
                 }
             }
         )+
@@ -457,20 +556,6 @@ impl<K, V> Serialize for HashMap<K, V>
     }
 }
 
-// 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 {
@@ -518,6 +603,30 @@ impl<T> Serialize for Arc<T> where T: Serialize, {
     }
 }
 
+impl<'a, T: ?Sized> Serialize for Cow<'a, T> where T: Serialize + ToOwned, {
+    #[inline]
+    fn serialize<S>(&self, serializer: &mut S) -> Result<(), S::Error>
+        where S: Serializer,
+    {
+        (**self).serialize(serializer)
+    }
+}
+
+///////////////////////////////////////////////////////////////////////////////
+
+impl<T, E> Serialize for Result<T, E> where T: Serialize, E: Serialize {
+    fn serialize<S>(&self, serializer: &mut S) -> Result<(), S::Error> where S: Serializer {
+        match *self {
+            Result::Ok(ref value) => {
+                serializer.visit_newtype_variant("Result", 0, "Ok", value)
+            }
+            Result::Err(ref value) => {
+                serializer.visit_newtype_variant("Result", 1, "Err", value)
+            }
+        }
+    }
+}
+
 ///////////////////////////////////////////////////////////////////////////////
 
 impl Serialize for path::Path {
@@ -535,3 +644,10 @@ impl Serialize for path::PathBuf {
         self.to_str().unwrap().serialize(serializer)
     }
 }
+
+#[cfg(feature = "nightly")]
+impl<T> Serialize for NonZero<T> where T: Serialize + Zeroable {
+    fn serialize<S>(&self, serializer: &mut S) -> Result<(), S::Error> where S: Serializer {
+        (**self).serialize(serializer)
+    }
+}

serde/src/ser/mod.rs

@@ -113,17 +113,48 @@ pub trait Serializer {
     fn visit_unit(&mut self) -> Result<(), Self::Error>;
 
     #[inline]
-    fn visit_named_unit(&mut self, _name: &str) -> Result<(), Self::Error> {
+    fn visit_unit_struct(&mut self, _name: &'static str) -> Result<(), Self::Error> {
         self.visit_unit()
     }
 
     #[inline]
-    fn visit_enum_unit(&mut self,
-                       _name: &str,
-                       _variant: &str) -> Result<(), Self::Error> {
+    fn visit_unit_variant(&mut self,
+                          _name: &'static str,
+                          _variant_index: usize,
+                          _variant: &'static str) -> Result<(), Self::Error> {
         self.visit_unit()
     }
 
+    /// The `visit_newtype_struct` allows a tuple struct with a single element, also known as a
+    /// newtyped value, to be more efficiently serialized than a tuple struct with multiple items.
+    /// By default it just serializes the value as a tuple struct sequence.
+    #[inline]
+    fn visit_newtype_struct<T>(&mut self,
+                               name: &'static str,
+                               value: T) -> Result<(), Self::Error>
+        where T: Serialize,
+    {
+        self.visit_tuple_struct(name, Some(value))
+    }
+
+    /// The `visit_newtype_variant` allows a variant with a single item to be more efficiently
+    /// serialized than a variant with multiple items. By default it just serializes the value as a
+    /// tuple variant sequence.
+    #[inline]
+    fn visit_newtype_variant<T>(&mut self,
+                                name: &'static str,
+                                variant_index: usize,
+                                variant: &'static str,
+                                value: T) -> Result<(), Self::Error>
+        where T: Serialize,
+    {
+        self.visit_tuple_variant(
+            name,
+            variant_index,
+            variant,
+            Some(value))
+    }
+
     fn visit_none(&mut self) -> Result<(), Self::Error>;
 
     fn visit_some<V>(&mut self, value: V) -> Result<(), Self::Error>
@@ -132,54 +163,102 @@ pub trait Serializer {
     fn visit_seq<V>(&mut self, visitor: V) -> Result<(), Self::Error>
         where V: SeqVisitor;
 
-    #[inline]
-    fn visit_named_seq<V>(&mut self,
-                          _name: &'static str,
-                          visitor: V) -> Result<(), Self::Error>
-        where V: SeqVisitor,
-    {
-        self.visit_seq(visitor)
-    }
-
-    #[inline]
-    fn visit_enum_seq<V>(&mut self,
-                         _name: &'static str,
-                         _variant: &'static str,
-                         visitor: V) -> Result<(), Self::Error>
-        where V: SeqVisitor,
-    {
-        self.visit_seq(visitor)
-    }
-
     fn visit_seq_elt<T>(&mut self, value: T) -> Result<(), Self::Error>
         where T: Serialize;
 
+    #[inline]
+    fn visit_tuple<V>(&mut self, visitor: V) -> Result<(), Self::Error>
+        where V: SeqVisitor,
+    {
+        self.visit_seq(visitor)
+    }
+
+    #[inline]
+    fn visit_tuple_elt<T>(&mut self, value: T) -> Result<(), Self::Error>
+        where T: Serialize
+    {
+        self.visit_seq_elt(value)
+    }
+
+    #[inline]
+    fn visit_tuple_struct<V>(&mut self,
+                             _name: &'static str,
+                             visitor: V) -> Result<(), Self::Error>
+        where V: SeqVisitor,
+    {
+        self.visit_tuple(visitor)
+    }
+
+    #[inline]
+    fn visit_tuple_struct_elt<T>(&mut self, value: T) -> Result<(), Self::Error>
+        where T: Serialize
+    {
+        self.visit_tuple_elt(value)
+    }
+
+    #[inline]
+    fn visit_tuple_variant<V>(&mut self,
+                              _name: &'static str,
+                              _variant_index: usize,
+                              variant: &'static str,
+                              visitor: V) -> Result<(), Self::Error>
+        where V: SeqVisitor,
+    {
+        self.visit_tuple_struct(variant, visitor)
+    }
+
+    #[inline]
+    fn visit_tuple_variant_elt<T>(&mut self, value: T) -> Result<(), Self::Error>
+        where T: Serialize
+    {
+        self.visit_tuple_struct_elt(value)
+    }
+
     fn visit_map<V>(&mut self, visitor: V) -> Result<(), Self::Error>
         where V: MapVisitor;
 
-    #[inline]
-    fn visit_named_map<V>(&mut self,
-                          _name: &'static str,
-                          visitor: V) -> Result<(), Self::Error>
-        where V: MapVisitor,
-    {
-        self.visit_map(visitor)
-    }
-
-    #[inline]
-    fn visit_enum_map<V>(&mut self,
-                          _name: &'static str,
-                          _variant: &'static str,
-                          visitor: V) -> Result<(), Self::Error>
-        where V: MapVisitor,
-    {
-        self.visit_map(visitor)
-    }
-
     fn visit_map_elt<K, V>(&mut self, key: K, value: V) -> Result<(), Self::Error>
         where K: Serialize,
               V: Serialize;
 
+    #[inline]
+    fn visit_struct<V>(&mut self,
+                       _name: &'static str,
+                       visitor: V) -> Result<(), Self::Error>
+        where V: MapVisitor,
+    {
+        self.visit_map(visitor)
+    }
+
+    #[inline]
+    fn visit_struct_elt<V>(&mut self,
+                           key: &'static str,
+                           value: V) -> Result<(), Self::Error>
+        where V: Serialize,
+    {
+        self.visit_map_elt(key, value)
+    }
+
+    #[inline]
+    fn visit_struct_variant<V>(&mut self,
+                               _name: &'static str,
+                               _variant_index: usize,
+                               variant: &'static str,
+                               visitor: V) -> Result<(), Self::Error>
+        where V: MapVisitor,
+    {
+        self.visit_struct(variant, visitor)
+    }
+
+    #[inline]
+    fn visit_struct_variant_elt<V>(&mut self,
+                                   key: &'static str,
+                                   value: V) -> Result<(), Self::Error>
+        where V: Serialize,
+    {
+        self.visit_struct_elt(key, value)
+    }
+
     /// Specify a format string for the serializer.
     ///
     /// The serializer format is used to determine which format

serde_codegen/Cargo.toml

@@ -1,16 +1,18 @@
 [package]
 name = "serde_codegen"
-version = "0.4.1"
+version = "0.5.1"
 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"
+repository = "https://github.com/serde-rs/serde"
+documentation = "https://serde-rs.github.io/serde/serde_codegen/serde_codegen/index.html"
 build = "build.rs"
+keywords = ["serde", "serialization"]
 
 [features]
 default = ["with-syntex"]
 nightly = ["quasi_macros"]
-with-syntex = ["quasi/with-syntex", "quasi_codegen/with-syntex", "syntex", "syntex_syntax"]
+with-syntex = ["quasi/with-syntex", "quasi_codegen", "quasi_codegen/with-syntex", "syntex", "syntex_syntax"]
 
 [build-dependencies]
 quasi_codegen = { verision = "*", optional = true }

serde_codegen/src/attr.rs

@@ -16,15 +16,20 @@ pub enum FieldNames {
 
 /// Represents field attribute information
 pub struct FieldAttrs {
+    skip_serializing_field: bool,
     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 {
+    pub fn new(
+        skip_serializing_field: bool,
+        default_value: bool,
+        name: P<ast::Expr>,
+    ) -> FieldAttrs {
         FieldAttrs {
+            skip_serializing_field: skip_serializing_field,
             names: FieldNames::Global(name),
             use_default: default_value,
         }
@@ -32,12 +37,14 @@ impl FieldAttrs {
 
     /// Create a FieldAttr with format specific field names
     pub fn new_with_formats(
+        skip_serializing_field: bool,
         default_value: bool,
         default_name: P<ast::Expr>,
         formats: HashMap<P<ast::Expr>, P<ast::Expr>>,
-        ) -> FieldAttrs {
+    ) -> FieldAttrs {
         FieldAttrs {
-            names:  FieldNames::Format {
+            skip_serializing_field: skip_serializing_field,
+            names: FieldNames::Format {
                 formats: formats,
                 default: default_name,
             },
@@ -105,4 +112,9 @@ impl FieldAttrs {
     pub fn use_default(&self) -> bool {
         self.use_default
     }
+
+    /// Predicate for ignoring a field when serializing a value
+    pub fn skip_serializing_field(&self) -> bool {
+        self.skip_serializing_field
+    }
 }

serde_codegen/src/de.rs

@@ -129,15 +129,24 @@ fn deserialize_item_struct(
         }
     }
 
-    match (named_fields.is_empty(), unnamed_fields == 0) {
-        (true, true) => {
+    match (named_fields.is_empty(), unnamed_fields) {
+        (true, 0) => {
             deserialize_unit_struct(
                 cx,
                 &builder,
                 item.ident,
             )
         }
-        (true, false) => {
+        (true, 1) => {
+            deserialize_newtype_struct(
+                cx,
+                &builder,
+                item.ident,
+                impl_generics,
+                ty,
+            )
+        }
+        (true, _) => {
             deserialize_tuple_struct(
                 cx,
                 &builder,
@@ -147,7 +156,7 @@ fn deserialize_item_struct(
                 unnamed_fields,
             )
         }
-        (false, true) => {
+        (false, 0) => {
             deserialize_struct(
                 cx,
                 &builder,
@@ -157,7 +166,7 @@ fn deserialize_item_struct(
                 struct_def,
             )
         }
-        (false, false) => {
+        (false, _) => {
             cx.bug("struct has named and unnamed fields")
         }
     }
@@ -190,11 +199,25 @@ fn deserialize_visitor(
         (
             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)
-                    })
-                )
+                .with_tys({
+                    let lifetimes = trait_generics.lifetimes.iter()
+                        .map(|lifetime_def| {
+                            builder.ty()
+                                .phantom_data()
+                                .ref_().lifetime(lifetime_def.lifetime.name)
+                                .ty()
+                                .unit()
+                        });
+
+                    let ty_params = trait_generics.ty_params.iter()
+                        .map(|ty_param| {
+                            builder.ty()
+                                .phantom_data()
+                                .id(ty_param.ident)
+                        });
+
+                    lifetimes.chain(ty_params)
+                })
                 .build(),
             builder.ty().path()
                 .segment("__Visitor").with_generics(trait_generics.clone()).build()
@@ -204,11 +227,11 @@ fn deserialize_visitor(
                 .with_tys(forward_tys)
                 .with_tys(placeholders)
                 .build().build()
-                .with_args(
-                    trait_generics.ty_params.iter().map(|_| {
-                        builder.expr().phantom_data()
-                    })
-                )
+                .with_args({
+                    let len = trait_generics.lifetimes.len() + trait_generics.ty_params.len();
+
+                    (0 .. len).map(|_| builder.expr().phantom_data())
+                })
                 .build(),
             trait_generics,
         )
@@ -260,7 +283,59 @@ fn deserialize_unit_struct(
             }
         }
 
-        deserializer.visit_named_unit($type_name, __Visitor)
+        deserializer.visit_unit_struct($type_name, __Visitor)
+    })
+}
+
+fn deserialize_newtype_struct(
+    cx: &ExtCtxt,
+    builder: &aster::AstBuilder,
+    type_ident: Ident,
+    impl_generics: &ast::Generics,
+    ty: P<ast::Ty>,
+) -> 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(),
+        1,
+    );
+
+    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 = $ty;
+
+            #[inline]
+            fn visit_newtype_struct<D>(&mut self, deserializer: &mut D) -> ::std::result::Result<Self::Value, D::Error>
+                where D: ::serde::de::Deserializer,
+            {
+                let value = try!(::serde::de::Deserialize::deserialize(deserializer));
+                Ok($type_ident(value))
+            }
+
+            #[inline]
+            fn visit_seq<__V>(&mut self, mut visitor: __V) -> ::std::result::Result<$ty, __V::Error>
+                where __V: ::serde::de::SeqVisitor,
+            {
+                $visit_seq_expr
+            }
+        }
+
+        deserializer.visit_newtype_struct($type_name, $visitor_expr)
     })
 }
 
@@ -297,6 +372,7 @@ fn deserialize_tuple_struct(
         impl $visitor_generics ::serde::de::Visitor for $visitor_ty $where_clause {
             type Value = $ty;
 
+            #[inline]
             fn visit_seq<__V>(&mut self, mut visitor: __V) -> ::std::result::Result<$ty, __V::Error>
                 where __V: ::serde::de::SeqVisitor,
             {
@@ -304,7 +380,7 @@ fn deserialize_tuple_struct(
             }
         }
 
-        deserializer.visit_named_seq($type_name, $visitor_expr)
+        deserializer.visit_tuple_struct($type_name, $fields, $visitor_expr)
     })
 }
 
@@ -321,7 +397,7 @@ fn deserialize_seq(
                 let $name = match try!(visitor.visit()) {
                     Some(value) => { value },
                     None => {
-                        return Err(::serde::de::Error::end_of_stream_error());
+                        return Err(::serde::de::Error::end_of_stream());
                     }
                 };
             ).unwrap()
@@ -342,6 +418,51 @@ fn deserialize_seq(
     })
 }
 
+fn deserialize_struct_as_seq(
+    cx: &ExtCtxt,
+    builder: &aster::AstBuilder,
+    struct_path: ast::Path,
+    struct_def: &StructDef,
+) -> P<ast::Expr> {
+    let let_values: Vec<P<ast::Stmt>> = (0 .. struct_def.fields.len())
+        .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());
+                    }
+                };
+            ).unwrap()
+        })
+        .collect();
+
+    let result = builder.expr().struct_path(struct_path)
+        .with_id_exprs(
+            struct_def.fields.iter()
+                .enumerate()
+                .map(|(i, field)| {
+                    (
+                        match field.node.kind {
+                            ast::NamedField(name, _) => name.clone(),
+                            ast::UnnamedField(_) => panic!("struct contains unnamed fields"),
+                        },
+                        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,
@@ -352,19 +473,27 @@ fn deserialize_struct(
 ) -> 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 (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(
+    let type_path = builder.path().id(type_ident).build();
+
+    let visit_seq_expr = deserialize_struct_as_seq(
+        cx,
+        builder,
+        type_path.clone(),
+        struct_def
+    );
+
+    let (field_visitor, fields_stmt, visit_map_expr) = deserialize_struct_visitor(
         cx,
         builder,
         struct_def,
-        builder.path().id(type_ident).build(),
+        type_path.clone()
     );
 
     let type_name = builder.expr().str(type_ident);
@@ -377,6 +506,13 @@ fn deserialize_struct(
         impl $visitor_generics ::serde::de::Visitor for $visitor_ty $where_clause {
             type Value = $ty;
 
+            #[inline]
+            fn visit_seq<__V>(&mut self, mut visitor: __V) -> ::std::result::Result<$ty, __V::Error>
+                where __V: ::serde::de::SeqVisitor,
+            {
+                $visit_seq_expr
+            }
+
             #[inline]
             fn visit_map<__V>(&mut self, mut visitor: __V) -> ::std::result::Result<$ty, __V::Error>
                 where __V: ::serde::de::MapVisitor,
@@ -385,7 +521,9 @@ fn deserialize_struct(
             }
         }
 
-        deserializer.visit_named_map($type_name, $visitor_expr)
+        $fields_stmt
+
+        deserializer.visit_struct($type_name, FIELDS, $visitor_expr)
     })
 }
 
@@ -407,11 +545,25 @@ fn deserialize_item_enum(
         enum_def.variants.iter()
             .map(|variant|
                  attr::FieldAttrs::new(
+                     false,
                      true,
                      builder.expr().str(variant.node.name)))
             .collect()
     );
 
+    let variants_expr = builder.expr().addr_of().slice()
+        .with_exprs(
+            enum_def.variants.iter()
+                .map(|variant| {
+                    builder.expr().str(variant.node.name)
+                })
+        )
+        .build();
+
+    let variants_stmt = quote_stmt!(cx,
+        const VARIANTS: &'static [&'static str] = $variants_expr;
+    ).unwrap();
+
     // Match arms to extract a variant from a string
     let variant_arms: Vec<_> = enum_def.variants.iter()
         .enumerate()
@@ -458,7 +610,9 @@ fn deserialize_item_enum(
             }
         }
 
-        deserializer.visit_enum($type_name, $visitor_expr)
+        $variants_stmt
+
+        deserializer.visit_enum($type_name, VARIANTS, $visitor_expr)
     })
 }
 
@@ -479,6 +633,12 @@ fn deserialize_variant(
                 Ok($type_ident::$variant_ident)
             })
         }
+        ast::TupleVariantKind(ref args) if args.len() == 1 => {
+            quote_expr!(cx, {
+                let val = try!(visitor.visit_newtype());
+                Ok($type_ident::$variant_ident(val))
+            })
+        }
         ast::TupleVariantKind(ref args) => {
             deserialize_tuple_variant(
                 cx,
@@ -543,7 +703,7 @@ fn deserialize_tuple_variant(
             }
         }
 
-        visitor.visit_seq($visitor_expr)
+        visitor.visit_tuple($fields, $visitor_expr)
     })
 }
 
@@ -558,11 +718,23 @@ fn deserialize_struct_variant(
 ) -> P<ast::Expr> {
     let where_clause = &generics.where_clause;
 
-    let (field_visitor, field_expr) = deserialize_struct_visitor(
+    let type_path = builder.path()
+        .id(type_ident)
+        .id(variant_ident)
+        .build();
+
+    let visit_seq_expr = deserialize_struct_as_seq(
+        cx,
+        builder,
+        type_path.clone(),
+        struct_def
+    );
+
+    let (field_visitor, fields_stmt, field_expr) = deserialize_struct_visitor(
         cx,
         builder,
         struct_def,
-        builder.path().id(type_ident).id(variant_ident).build(),
+        type_path
     );
 
     let (visitor_item, visitor_ty, visitor_expr, visitor_generics) =
@@ -581,6 +753,14 @@ fn deserialize_struct_variant(
         impl $visitor_generics ::serde::de::Visitor for $visitor_ty $where_clause {
             type Value = $ty;
 
+            #[inline]
+            fn visit_seq<__V>(&mut self, mut visitor: __V) -> ::std::result::Result<$ty, __V::Error>
+                where __V: ::serde::de::SeqVisitor,
+            {
+                $visit_seq_expr
+            }
+
+            #[inline]
             fn visit_map<__V>(&mut self, mut visitor: __V) -> ::std::result::Result<$ty, __V::Error>
                 where __V: ::serde::de::MapVisitor,
             {
@@ -588,7 +768,9 @@ fn deserialize_struct_variant(
             }
         }
 
-        visitor.visit_map($visitor_expr)
+        $fields_stmt
+
+        visitor.visit_struct(FIELDS, $visitor_expr)
     })
 }
 
@@ -612,6 +794,20 @@ fn deserialize_field_visitor(
         )
         .build();
 
+    let index_field_arms: Vec<_> = field_idents.iter()
+        .enumerate()
+        .map(|(field_index, field_ident)| {
+            quote_arm!(cx, $field_index => { Ok(__Field::$field_ident) })
+        })
+        .collect();
+
+    let index_body = quote_expr!(cx,
+        match value {
+            $index_field_arms
+            _ => { Err(::serde::de::Error::syntax("expected a field")) }
+        }
+    );
+
     // A set of all the formats that have specialized field attributes
     let formats = field_attrs.iter()
         .fold(HashSet::new(), |mut set, field_expr| {
@@ -628,15 +824,15 @@ fn deserialize_field_visitor(
         })
         .collect();
 
-    let body = if formats.is_empty() {
+    let str_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)) }
-                    })
+            match value {
+                $default_field_arms
+                _ => { Err(::serde::de::Error::unknown_field(value)) }
+            })
     } else {
-        let field_arms : Vec<_> = formats.iter()
+        let field_arms: Vec<_> = formats.iter()
             .map(|fmt| {
                 field_idents.iter()
                     .zip(field_attrs.iter())
@@ -648,27 +844,28 @@ fn deserialize_field_visitor(
             })
             .collect();
 
-        let fmt_matches : Vec<_> = formats.iter()
+        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))
+                            Err(::serde::de::Error::unknown_field(value))
                         }
                     }})
             })
             .collect();
 
         quote_expr!(cx,
-                    match __D::format() {
-                        $fmt_matches
-                        _ => match value {
-                            $default_field_arms
-                            _ => { Err(::serde::de::Error::unknown_field_error(value)) }
-                        }
-                    })
+            match __D::format() {
+                $fmt_matches
+                _ => match value {
+                    $default_field_arms
+                    _ => { Err(::serde::de::Error::unknown_field(value)) }
+                }
+            }
+        )
     };
 
     let impl_item = quote_item!(cx,
@@ -688,10 +885,16 @@ fn deserialize_field_visitor(
                 {
                     type Value = __Field;
 
+                    fn visit_usize<E>(&mut self, value: usize) -> ::std::result::Result<__Field, E>
+                        where E: ::serde::de::Error,
+                    {
+                        $index_body
+                    }
+
                     fn visit_str<E>(&mut self, value: &str) -> ::std::result::Result<__Field, E>
                         where E: ::serde::de::Error,
                     {
-                        $body
+                        $str_body
                     }
 
                     fn visit_bytes<E>(&mut self, value: &[u8]) -> ::std::result::Result<__Field, E>
@@ -700,13 +903,18 @@ fn deserialize_field_visitor(
                         // 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()),
+                            _ => {
+                                Err(
+                                    ::serde::de::Error::syntax(
+                                        "could not convert a byte string to a String"
+                                    )
+                                )
+                            }
                         }
                     }
                 }
 
-                deserializer.visit(
-                    __FieldVisitor::<D>{ phantom: PhantomData })
+                deserializer.visit(__FieldVisitor::<D>{ phantom: PhantomData })
             }
         }
     ).unwrap();
@@ -719,7 +927,7 @@ fn deserialize_struct_visitor(
     builder: &aster::AstBuilder,
     struct_def: &ast::StructDef,
     struct_path: ast::Path,
-) -> (Vec<P<ast::Item>>, P<ast::Expr>) {
+) -> (Vec<P<ast::Item>>, P<ast::Stmt>, P<ast::Expr>) {
     let field_visitor = deserialize_field_visitor(
         cx,
         builder,
@@ -733,7 +941,23 @@ fn deserialize_struct_visitor(
         struct_def,
     );
 
-    (field_visitor, visit_map_expr)
+    let fields_expr = builder.expr().addr_of().slice()
+        .with_exprs(
+            struct_def.fields.iter()
+                .map(|field| {
+                    match field.node.kind {
+                        ast::NamedField(name, _) => builder.expr().str(name),
+                        ast::UnnamedField(_) => panic!("struct contains unnamed fields"),
+                    }
+                })
+        )
+        .build();
+
+    let fields_stmt = quote_stmt!(cx,
+        const FIELDS: &'static [&'static str] = $fields_expr;
+    ).unwrap();
+
+    (field_visitor, fields_stmt, visit_map_expr)
 }
 
 fn deserialize_map(

serde_codegen/src/field.rs

@@ -58,10 +58,18 @@ fn default_value(mi: &ast::MetaItem) -> bool {
     }
 }
 
+fn skip_serializing_field(mi: &ast::MetaItem) -> bool {
+    if let ast::MetaItem_::MetaWord(ref n) = mi.node {
+        n == &"skip_serializing"
+    } else {
+        false
+    }
+}
+
 fn field_attrs<'a>(
     builder: &aster::AstBuilder,
     field: &'a ast::StructField,
-) -> (Rename<'a>, bool) {
+) -> (Rename<'a>, bool, bool) {
     field.node.attrs.iter()
         .find(|sa| {
             if let ast::MetaList(ref n, _) = sa.node.value.node {
@@ -73,15 +81,18 @@ fn field_attrs<'a>(
         .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))))
+                Some((
+                    vals.iter()
+                        .fold(None, |v, mi| v.or(rename(builder, mi)))
+                        .unwrap_or(Rename::None),
+                    vals.iter().any(|mi| default_value(mi)),
+                    vals.iter().any(|mi| skip_serializing_field(mi)),
+                ))
             } else {
-                Some((Rename::None, false))
+                Some((Rename::None, false, false))
             }
         })
-        .unwrap_or((Rename::None, false))
+        .unwrap_or((Rename::None, false, false))
 }
 
 pub fn struct_field_attrs(
@@ -92,23 +103,26 @@ pub fn struct_field_attrs(
     struct_def.fields.iter()
         .map(|field| {
             match field_attrs(builder, field) {
-                (Rename::Global(rename), default_value) =>
+                (Rename::Global(rename), default_value, skip_serializing_field) =>
                     FieldAttrs::new(
+                        skip_serializing_field,
                         default_value,
                         builder.expr().build_lit(P(rename.clone()))),
-                (Rename::Format(renames), default_value) => {
+                (Rename::Format(renames), default_value, skip_serializing_field) => {
                     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(
+                        skip_serializing_field,
                         default_value,
                         default_field_name(cx, builder, field.node.kind),
                         res)
                 },
-                (Rename::None, default_value) => {
+                (Rename::None, default_value, skip_serializing_field) => {
                     FieldAttrs::new(
+                        skip_serializing_field,
                         default_value,
                         default_field_name(cx, builder, field.node.kind))
                 }

serde_codegen/src/ser.rs

@@ -55,10 +55,7 @@ pub fn expand_derive_serialize(
         &builder,
         &item,
         &impl_generics,
-        builder.ty()
-            .ref_()
-            .lifetime("'__a")
-            .build_ty(ty.clone()),
+        ty.clone(),
     );
 
     let where_clause = &impl_generics.where_clause;
@@ -127,15 +124,22 @@ fn serialize_item_struct(
         }
     }
 
-    match (named_fields.is_empty(), unnamed_fields == 0) {
-        (true, true) => {
+    match (named_fields.is_empty(), unnamed_fields) {
+        (true, 0) => {
             serialize_unit_struct(
                 cx,
                 &builder,
                 item.ident,
             )
         }
-        (true, false) => {
+        (true, 1) => {
+            serialize_newtype_struct(
+                cx,
+                &builder,
+                item.ident,
+            )
+        }
+        (true, _) => {
             serialize_tuple_struct(
                 cx,
                 &builder,
@@ -145,7 +149,7 @@ fn serialize_item_struct(
                 unnamed_fields,
             )
         }
-        (false, true) => {
+        (false, 0) => {
             serialize_struct(
                 cx,
                 &builder,
@@ -156,7 +160,7 @@ fn serialize_item_struct(
                 named_fields,
             )
         }
-        (false, false) => {
+        (false, _) => {
             cx.bug("struct has named and unnamed fields")
         }
     }
@@ -169,7 +173,17 @@ fn serialize_unit_struct(
 ) -> P<ast::Expr> {
     let type_name = builder.expr().str(type_ident);
 
-    quote_expr!(cx, serializer.visit_named_unit($type_name))
+    quote_expr!(cx, serializer.visit_unit_struct($type_name))
+}
+
+fn serialize_newtype_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_newtype_struct($type_name, &self.0))
 }
 
 fn serialize_tuple_struct(
@@ -184,7 +198,10 @@ fn serialize_tuple_struct(
         cx,
         builder,
         ty.clone(),
-        ty,
+        builder.ty()
+            .ref_()
+            .lifetime("'__a")
+            .build_ty(ty.clone()),
         fields,
         impl_generics,
     );
@@ -194,10 +211,10 @@ fn serialize_tuple_struct(
     quote_expr!(cx, {
         $visitor_struct
         $visitor_impl
-        serializer.visit_named_seq($type_name, Visitor {
+        serializer.visit_tuple_struct($type_name, Visitor {
             value: self,
             state: 0,
-            _structure_ty: ::std::marker::PhantomData,
+            _structure_ty: ::std::marker::PhantomData::<&$ty>,
         })
     })
 }
@@ -215,7 +232,10 @@ fn serialize_struct(
         cx,
         builder,
         ty.clone(),
-        ty,
+        builder.ty()
+            .ref_()
+            .lifetime("'__a")
+            .build_ty(ty.clone()),
         struct_def,
         impl_generics,
         fields.iter().map(|field| quote_expr!(cx, &self.value.$field)),
@@ -226,10 +246,10 @@ fn serialize_struct(
     quote_expr!(cx, {
         $visitor_struct
         $visitor_impl
-        serializer.visit_named_map($type_name, Visitor {
+        serializer.visit_struct($type_name, Visitor {
             value: self,
             state: 0,
-            _structure_ty: ::std::marker::PhantomData,
+            _structure_ty: ::std::marker::PhantomData::<&$ty>,
         })
     })
 }
@@ -243,7 +263,8 @@ fn serialize_item_enum(
     enum_def: &ast::EnumDef,
 ) -> P<ast::Expr> {
     let arms: Vec<ast::Arm> = enum_def.variants.iter()
-        .map(|variant| {
+        .enumerate()
+        .map(|(variant_index, variant)| {
             serialize_variant(
                 cx,
                 builder,
@@ -251,6 +272,7 @@ fn serialize_item_enum(
                 impl_generics,
                 ty.clone(),
                 variant,
+                variant_index,
             )
         })
         .collect();
@@ -269,6 +291,7 @@ fn serialize_variant(
     generics: &ast::Generics,
     ty: P<ast::Ty>,
     variant: &ast::Variant,
+    variant_index: usize,
 ) -> ast::Arm {
     let type_name = builder.expr().str(type_ident);
     let variant_ident = variant.node.name;
@@ -282,14 +305,34 @@ fn serialize_variant(
 
             quote_arm!(cx,
                 $pat => {
-                    ::serde::ser::Serializer::visit_enum_unit(
+                    ::serde::ser::Serializer::visit_unit_variant(
                         serializer,
                         $type_name,
+                        $variant_index,
                         $variant_name,
                     )
                 }
             )
-        }
+        },
+        ast::TupleVariantKind(ref args) if args.len() == 1 => {
+            let field = builder.id("__simple_value");
+            let field = builder.pat().ref_id(field);
+            let pat = builder.pat().enum_()
+                .id(type_ident).id(variant_ident).build()
+                .with_pats(Some(field).into_iter())
+                .build();
+            quote_arm!(cx,
+                $pat => {
+                    ::serde::ser::Serializer::visit_newtype_variant(
+                        serializer,
+                        $type_name,
+                        $variant_index,
+                        $variant_name,
+                        __simple_value,
+                    )
+                }
+            )
+        },
         ast::TupleVariantKind(ref args) => {
             let fields: Vec<ast::Ident> = (0 .. args.len())
                 .map(|i| builder.id(format!("__field{}", i)))
@@ -304,6 +347,7 @@ fn serialize_variant(
                 cx,
                 builder,
                 type_name,
+                variant_index,
                 variant_name,
                 generics,
                 ty,
@@ -340,6 +384,7 @@ fn serialize_variant(
                 cx,
                 builder,
                 type_name,
+                variant_index,
                 variant_name,
                 generics,
                 ty,
@@ -356,6 +401,7 @@ fn serialize_tuple_variant(
     cx: &ExtCtxt,
     builder: &aster::AstBuilder,
     type_name: P<ast::Expr>,
+    variant_index: usize,
     variant_name: P<ast::Expr>,
     generics: &ast::Generics,
     structure_ty: P<ast::Ty>,
@@ -376,7 +422,7 @@ fn serialize_tuple_variant(
     let (visitor_struct, visitor_impl) = serialize_tuple_struct_visitor(
         cx,
         builder,
-        structure_ty,
+        structure_ty.clone(),
         variant_ty,
         args.len(),
         generics,
@@ -385,9 +431,7 @@ fn serialize_tuple_variant(
     let value_expr = builder.expr().tuple()
         .with_exprs(
             fields.iter().map(|field| {
-                builder.expr()
-                    .addr_of()
-                    .id(field)
+                builder.expr().id(field)
             })
         )
         .build();
@@ -395,10 +439,10 @@ fn serialize_tuple_variant(
     quote_expr!(cx, {
         $visitor_struct
         $visitor_impl
-        serializer.visit_enum_seq($type_name, $variant_name, Visitor {
+        serializer.visit_tuple_variant($type_name, $variant_index, $variant_name, Visitor {
             value: $value_expr,
             state: 0,
-            _structure_ty: ::std::marker::PhantomData,
+            _structure_ty: ::std::marker::PhantomData::<&$structure_ty>,
         })
     })
 }
@@ -407,6 +451,7 @@ fn serialize_struct_variant(
     cx: &ExtCtxt,
     builder: &aster::AstBuilder,
     type_name: P<ast::Expr>,
+    variant_index: usize,
     variant_name: P<ast::Expr>,
     generics: &ast::Generics,
     structure_ty: P<ast::Ty>,
@@ -427,9 +472,7 @@ fn serialize_struct_variant(
     let value_expr = builder.expr().tuple()
         .with_exprs(
             fields.iter().map(|field| {
-                builder.expr()
-                    .addr_of()
-                    .id(field)
+                builder.expr().id(field)
             })
         )
         .build();
@@ -437,7 +480,7 @@ fn serialize_struct_variant(
     let (visitor_struct, visitor_impl) = serialize_struct_visitor(
         cx,
         builder,
-        structure_ty,
+        structure_ty.clone(),
         value_ty,
         struct_def,
         generics,
@@ -451,10 +494,10 @@ fn serialize_struct_variant(
     quote_expr!(cx, {
         $visitor_struct
         $visitor_impl
-        serializer.visit_enum_map($type_name, $variant_name, Visitor {
+        serializer.visit_struct_variant($type_name, $variant_index, $variant_name, Visitor {
             value: $value_expr,
             state: 0,
-            _structure_ty: ::std::marker::PhantomData,
+            _structure_ty: ::std::marker::PhantomData::<&$structure_ty>,
         })
     })
 }
@@ -476,7 +519,7 @@ fn serialize_tuple_struct_visitor(
             quote_arm!(cx,
                 $i => {
                     self.state += 1;
-                    let v = try!(serializer.visit_seq_elt(&$expr));
+                    let v = try!(serializer.visit_tuple_struct_elt(&$expr));
                     Ok(Some(v))
                 }
             )
@@ -494,19 +537,12 @@ fn serialize_tuple_struct_visitor(
         .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,
+                _structure_ty: ::std::marker::PhantomData<&'__a $structure_ty>,
             }
         ).unwrap(),
 
@@ -550,6 +586,7 @@ fn serialize_struct_visitor<I>(
 
     let arms: Vec<ast::Arm> = field_attrs.into_iter()
         .zip(value_exprs)
+        .filter(|&(ref field, _)| !field.skip_serializing_field())
         .enumerate()
         .map(|(i, (field, value_expr))| {
             let key_expr = field.serializer_key_expr(cx);
@@ -559,7 +596,7 @@ fn serialize_struct_visitor<I>(
                     Ok(
                         Some(
                             try!(
-                                serializer.visit_map_elt(
+                                serializer.visit_struct_elt(
                                     $key_expr,
                                     $value_expr,
                                 )
@@ -582,19 +619,12 @@ fn serialize_struct_visitor<I>(
         .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,
+                _structure_ty: ::std::marker::PhantomData<&'__a $structure_ty>,
             }
         ).unwrap(),
 

serde_json/Cargo.toml

@@ -0,0 +1,14 @@
+[package]
+name = "serde_json"
+version = "0.5.1"
+authors = ["Erick Tryzelaar <erick.tryzelaar@gmail.com>"]
+license = "MIT/Apache-2.0"
+description = "A JSON serialization file format"
+repository = "https://github.com/serde-rs/serde"
+documentation = "https://serde-rs.github.io/serde/serde_json/serde_json/index.html"
+readme = "../README.md"
+keywords = ["json", "serde", "serialization"]
+
+[dependencies]
+num = "*"
+serde = { version = "*", path = "../serde" }

serde_json/src/builder.rs

@@ -10,8 +10,9 @@
 
 use std::collections::BTreeMap;
 
-use ser::{self, Serialize};
-use json::value::{self, Value};
+use serde::ser::{self, Serialize};
+
+use value::{self, Value};
 
 pub struct ArrayBuilder {
     array: Vec<Value>,

serde_json/src/de.rs

@@ -3,10 +3,10 @@ use std::i32;
 use std::io;
 use std::str;
 
-use de;
-use iter::LineColIterator;
+use serde::de;
+use serde::iter::LineColIterator;
 
-use super::error::{Error, ErrorCode};
+use super::error::{Error, ErrorCode, Result};
 
 pub struct Deserializer<Iter: Iterator<Item=io::Result<u8>>> {
     rdr: LineColIterator<Iter>,
@@ -28,98 +28,128 @@ impl<Iter> Deserializer<Iter>
 {
     /// Creates the JSON parser from an `std::iter::Iterator`.
     #[inline]
-    pub fn new(rdr: Iter) -> Result<Deserializer<Iter>, Error> {
-        let mut deserializer = Deserializer {
+    pub fn new(rdr: Iter) -> Deserializer<Iter> {
+        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> {
+    pub fn end(&mut self) -> Result<()> {
         try!(self.parse_whitespace());
-        if self.eof() {
+        if try!(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 eof(&mut self) -> Result<bool> {
+        Ok(try!(self.peek()).is_none())
     }
 
-    fn next_char(&mut self) -> Result<Option<u8>, Error> {
-        try!(self.bump());
-        Ok(self.ch)
+    fn peek(&mut self) -> Result<Option<u8>> {
+        match self.ch {
+            Some(ch) => Ok(Some(ch)),
+            None => {
+                match self.rdr.next() {
+                    Some(Err(err)) => Err(Error::IoError(err)),
+                    Some(Ok(ch)) => {
+                        self.ch = Some(ch);
+                        Ok(self.ch)
+                    }
+                    None => Ok(None),
+                }
+            }
+        }
     }
 
-    fn ch_is(&self, c: u8) -> bool {
-        self.ch == Some(c)
+    fn peek_or_null(&mut self) -> Result<u8> {
+        Ok(try!(self.peek()).unwrap_or(b'\x00'))
+    }
+
+    fn eat_char(&mut self) {
+        self.ch = None;
+    }
+
+    fn next_char(&mut self) -> Result<Option<u8>> {
+        match self.ch.take() {
+            Some(ch) => Ok(Some(ch)),
+            None => {
+                match self.rdr.next() {
+                    Some(Err(err)) => Err(Error::IoError(err)),
+                    Some(Ok(ch)) => Ok(Some(ch)),
+                    None => Ok(None),
+                }
+            }
+        }
+    }
+
+    fn next_char_or_null(&mut self) -> Result<u8> {
+        Ok(try!(self.next_char()).unwrap_or(b'\x00'))
     }
 
     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_whitespace(&mut self) -> Result<()> {
+        loop {
+            match try!(self.peek_or_null()) {
+                b' ' | b'\n' | b'\t' | b'\r' => {
+                    self.eat_char();
+                }
+                _ => { return Ok(()); }
+            }
+        }
     }
 
-    fn parse_value<V>(&mut self, mut visitor: V) -> Result<V::Value, Error>
+    fn parse_value<V>(&mut self, mut visitor: V) -> Result<V::Value>
         where V: de::Visitor,
     {
         try!(self.parse_whitespace());
 
-        if self.eof() {
+        if try!(self.eof()) {
             return Err(self.error(ErrorCode::EOFWhileParsingValue));
         }
 
-        let value = match self.ch_or_null() {
+        let value = match try!(self.peek_or_null()) {
             b'n' => {
+                self.eat_char();
                 try!(self.parse_ident(b"ull"));
                 visitor.visit_unit()
             }
             b't' => {
+                self.eat_char();
                 try!(self.parse_ident(b"rue"));
                 visitor.visit_bool(true)
             }
             b'f' => {
+                self.eat_char();
                 try!(self.parse_ident(b"alse"));
                 visitor.visit_bool(false)
             }
-            b'0' ... b'9' | b'-' => self.parse_number(visitor),
+            b'-' => {
+                self.eat_char();
+                self.parse_integer(false, visitor)
+            }
+            b'0' ... b'9' => {
+                self.parse_integer(true, visitor)
+            }
             b'"' => {
+                self.eat_char();
                 try!(self.parse_string());
                 let s = str::from_utf8(&self.str_buf).unwrap();
                 visitor.visit_str(s)
             }
             b'[' => {
-                try!(self.bump());
+                self.eat_char();
                 visitor.visit_seq(SeqVisitor::new(self))
             }
             b'{' => {
-                try!(self.bump());
+                self.eat_char();
                 visitor.visit_map(MapVisitor::new(self))
             }
             _ => {
@@ -134,147 +164,207 @@ impl<Iter> Deserializer<Iter>
         }
     }
 
-    fn parse_ident(&mut self, ident: &[u8]) -> Result<(), Error> {
+    fn parse_ident(&mut self, ident: &[u8]) -> Result<()> {
         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>
+    fn parse_integer<V>(&mut self, pos: bool, visitor: V) -> Result<V::Value>
         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() {
+        match try!(self.next_char_or_null()) {
             b'0' => {
-                try!(self.bump());
-
                 // There can be only one leading '0'.
-                match self.ch_or_null() {
+                match try!(self.peek_or_null()) {
                     b'0' ... b'9' => {
-                        return Err(self.error(ErrorCode::InvalidNumber));
+                        Err(self.error(ErrorCode::InvalidNumber))
+                    }
+                    _ => {
+                        self.parse_number(pos, 0, visitor)
                     }
-                    _ => ()
                 }
             },
-            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)));
+            c @ b'1' ... b'9' => {
+                let mut res: u64 = (c as u64) - ('0' as u64);
 
-                            try!(self.bump());
+                loop {
+                    match try!(self.peek_or_null()) {
+                        c @ b'0' ... b'9' => {
+                            self.eat_char();
+
+                            let digit = (c as u64) - ('0' as u64);
+
+                            // We need to be careful with overflow. If we can, try to keep the
+                            // number as a `u64` until we grow too large. At that point, switch to
+                            // parsing the value as a `f64`.
+                            match res.checked_mul(10).and_then(|val| val.checked_add(digit)) {
+                                Some(res_) => { res = res_; }
+                                None => {
+                                    return self.parse_float(
+                                        pos,
+                                        (res as f64) * 10.0 + (digit as f64),
+                                        visitor);
+                                }
+                            }
+                        }
+                        _ => {
+                            return self.parse_number(pos, res, visitor);
                         }
-                        _ => break,
                     }
                 }
             }
-            _ => { return Err(self.error(ErrorCode::InvalidNumber)); }
+            _ => {
+                Err(self.error(ErrorCode::InvalidNumber))
+            }
         }
-
-        Ok(accum)
     }
 
-    fn parse_decimal(&mut self, res: f64) -> Result<f64, Error> {
-        try!(self.bump());
+    fn parse_float<V>(&mut self,
+                      pos: bool,
+                      mut res: f64,
+                      mut visitor: V) -> Result<V::Value>
+        where V: de::Visitor,
+    {
+        loop {
+            match try!(self.next_char_or_null()) {
+                c @ b'0' ... b'9' => {
+                    let digit = (c as u64) - ('0' as u64);
+
+                    res *= 10.0;
+                    res += digit as f64;
+                }
+                _ => {
+                    match try!(self.peek_or_null()) {
+                        b'.' => {
+                            return self.parse_decimal(pos, res, visitor);
+                        }
+                        b'e' | b'E' => {
+                            return self.parse_exponent(pos, res, visitor);
+                        }
+                        _ => {
+                            if !pos {
+                                res = -res;
+                            }
+
+                            return visitor.visit_f64(res);
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    fn parse_number<V>(&mut self,
+                       pos: bool,
+                       res: u64,
+                       mut visitor: V) -> Result<V::Value>
+        where V: de::Visitor,
+    {
+        match try!(self.peek_or_null()) {
+            b'.' => {
+                self.parse_decimal(pos, res as f64, visitor)
+            }
+            b'e' | b'E' => {
+                self.parse_exponent(pos, res as f64, visitor)
+            }
+            _ => {
+                if pos {
+                    visitor.visit_u64(res)
+                } else {
+                    // FIXME: `wrapping_neg` will be stable in Rust 1.2
+                    //let res_i64 = (res as i64).wrapping_neg();
+                    let res_i64 = (!res + 1) as i64;
+
+                    // Convert into a float if we underflow.
+                    if res_i64 > 0 {
+                        visitor.visit_f64(-(res as f64))
+                    } else {
+                        visitor.visit_i64(res_i64)
+                    }
+                }
+            }
+        }
+    }
+
+    fn parse_decimal<V>(&mut self,
+                        pos: bool,
+                        mut res: f64,
+                        mut visitor: V) -> Result<V::Value>
+        where V: de::Visitor,
+    {
+        self.eat_char();
+
+        let mut dec = 0.1;
 
         // Make sure a digit follows the decimal place.
-        match self.ch_or_null() {
-            b'0' ... b'9' => (),
+        match try!(self.next_char_or_null()) {
+            c @ b'0' ... b'9' => {
+                res += (((c as u64) - (b'0' as u64)) as f64) * dec;
+            }
              _ => { return Err(self.error(ErrorCode::InvalidNumber)); }
         }
 
-        let mut res = res;
-        let mut dec = 1.0;
-        while !self.eof() {
-            match self.ch_or_null() {
+        loop {
+            match try!(self.peek_or_null()) {
                 c @ b'0' ... b'9' => {
+                    self.eat_char();
+
                     dec /= 10.0;
                     res += (((c as u64) - (b'0' as u64)) as f64) * dec;
-                    try!(self.bump());
                 }
-                _ => break,
+                _ => { break; }
+            }
+        }
+
+        match try!(self.peek_or_null()) {
+            b'e' | b'E' => {
+                self.parse_exponent(pos, res, visitor)
+            }
+            _ => {
+                if pos {
+                    visitor.visit_f64(res)
+                } else {
+                    visitor.visit_f64(-res)
+                }
             }
         }
 
-        Ok(res)
     }
 
-    fn parse_exponent(&mut self, mut res: f64) -> Result<f64, Error> {
-        try!(self.bump());
+    fn parse_exponent<V>(&mut self,
+                         pos: bool,
+                         mut res: f64,
+                         mut visitor: V) -> Result<V::Value>
+        where V: de::Visitor,
+    {
+        self.eat_char();
 
-        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;
-        }
+        let pos_exp = match try!(self.peek_or_null()) {
+            b'+' => { self.eat_char(); true }
+            b'-' => { self.eat_char(); false }
+            _ => { true }
+        };
 
         // Make sure a digit follows the exponent place.
-        match self.ch_or_null() {
-            b'0' ... b'9' => (),
+        let mut exp = match try!(self.next_char_or_null()) {
+            c @ b'0' ... b'9' => { (c as u64) - (b'0' as u64) }
             _ => { return Err(self.error(ErrorCode::InvalidNumber)); }
-        }
-        while !self.eof() {
-            match self.ch_or_null() {
+        };
+
+        loop {
+            match try!(self.peek_or_null()) {
                 c @ b'0' ... b'9' => {
+                    self.eat_char();
+
                     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
+                _ => { break; }
             }
         }
 
@@ -284,21 +374,24 @@ impl<Iter> Deserializer<Iter>
             return Err(self.error(ErrorCode::InvalidNumber));
         };
 
-        if neg_exp {
-            res /= exp;
-        } else {
+        if pos_exp {
             res *= exp;
+        } else {
+            res /= exp;
         }
 
-        Ok(res)
+        if pos {
+            visitor.visit_f64(res)
+        } else {
+            visitor.visit_f64(-res)
+        }
     }
 
-    fn decode_hex_escape(&mut self) -> Result<u16, Error> {
+    fn decode_hex_escape(&mut self) -> Result<u16> {
         let mut i = 0;
         let mut n = 0u16;
-        while i < 4 && !self.eof() {
-            try!(self.bump());
-            n = match self.ch_or_null() {
+        while i < 4 && !try!(self.eof()) {
+            n = match try!(self.next_char_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,
@@ -320,7 +413,7 @@ impl<Iter> Deserializer<Iter>
         Ok(n)
     }
 
-    fn parse_string(&mut self) -> Result<(), Error> {
+    fn parse_string(&mut self) -> Result<()> {
         self.str_buf.clear();
 
         loop {
@@ -331,7 +424,6 @@ impl<Iter> Deserializer<Iter>
 
             match ch {
                 b'"' => {
-                    try!(self.bump());
                     return Ok(());
                 }
                 b'\\' => {
@@ -409,16 +501,13 @@ impl<Iter> Deserializer<Iter>
         }
     }
 
-    fn parse_object_colon(&mut self) -> Result<(), Error> {
+    fn parse_object_colon(&mut self) -> Result<()> {
         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))
+        match try!(self.next_char()) {
+            Some(b':') => Ok(()),
+            Some(_) => Err(self.error(ErrorCode::ExpectedColon)),
+            None => Err(self.error(ErrorCode::EOFWhileParsingObject)),
         }
     }
 }
@@ -429,54 +518,74 @@ impl<Iter> de::Deserializer for Deserializer<Iter>
     type Error = Error;
 
     #[inline]
-    fn visit<V>(&mut self, visitor: V) -> Result<V::Value, Error>
+    fn visit<V>(&mut self, visitor: V) -> Result<V::Value>
         where V: de::Visitor,
     {
         self.parse_value(visitor)
     }
 
+    /// Parses a `null` as a None, and any other values as a `Some(...)`.
     #[inline]
-    fn visit_option<V>(&mut self, mut visitor: V) -> Result<V::Value, Error>
+    fn visit_option<V>(&mut self, mut visitor: V) -> Result<V::Value>
         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)
+        match try!(self.peek_or_null()) {
+            b'n' => {
+                self.eat_char();
+                try!(self.parse_ident(b"ull"));
+                visitor.visit_none()
+            }
+            _ => {
+                visitor.visit_some(self)
+            }
         }
     }
 
+    /// Parses a newtype struct as the underlying value.
     #[inline]
-    fn visit_enum<V>(&mut self, _name: &str, mut visitor: V) -> Result<V::Value, Error>
+    fn visit_newtype_struct<V>(&mut self,
+                               _name: &str,
+                               mut visitor: V) -> Result<V::Value>
+        where V: de::Visitor,
+    {
+        visitor.visit_newtype_struct(self)
+    }
+
+    /// Parses an enum as an object like `{"$KEY":$VALUE}`, where $VALUE is either a straight
+    /// value, a `[..]`, or a `{..}`.
+    #[inline]
+    fn visit_enum<V>(&mut self,
+                     _name: &str,
+                     _variants: &'static [&'static str],
+                     mut visitor: V) -> Result<V::Value>
         where V: de::EnumVisitor,
     {
         try!(self.parse_whitespace());
 
-        if self.ch_is(b'{') {
-            try!(self.bump());
-            try!(self.parse_whitespace());
+        match try!(self.next_char_or_null()) {
+            b'{' => {
+                try!(self.parse_whitespace());
 
-            let value = {
-                try!(visitor.visit(&mut *self))
-            };
+                let value = {
+                    try!(visitor.visit(&mut *self))
+                };
 
-            try!(self.parse_whitespace());
+                try!(self.parse_whitespace());
 
-            if self.ch_is(b'}') {
-                try!(self.bump());
-                Ok(value)
-            } else {
+                match try!(self.next_char_or_null()) {
+                    b'}' => {
+                        Ok(value)
+                    }
+                    _ => {
+                        Err(self.error(ErrorCode::ExpectedSomeValue))
+                    }
+                }
+            }
+            _ => {
                 Err(self.error(ErrorCode::ExpectedSomeValue))
             }
-        } else {
-            Err(self.error(ErrorCode::ExpectedSomeValue))
         }
     }
 
@@ -505,24 +614,27 @@ impl<'a, Iter> de::SeqVisitor for SeqVisitor<'a, Iter>
 {
     type Error = Error;
 
-    fn visit<T>(&mut self) -> Result<Option<T>, Error>
+    fn visit<T>(&mut self) -> Result<Option<T>>
         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() {
+        match try!(self.de.peek()) {
+            Some(b']') => {
+                return Ok(None);
+            }
+            Some(b',') if !self.first => {
+                self.de.eat_char();
+            }
+            Some(_) => {
+                if self.first {
+                    self.first = false;
+                } else {
+                    return Err(self.de.error(ErrorCode::ExpectedListCommaOrEnd));
+                }
+            }
+            None => {
                 return Err(self.de.error(ErrorCode::EOFWhileParsingList));
-            } else {
-                return Err(self.de.error(ErrorCode::ExpectedListCommaOrEnd));
             }
         }
 
@@ -530,15 +642,17 @@ impl<'a, Iter> de::SeqVisitor for SeqVisitor<'a, Iter>
         Ok(Some(value))
     }
 
-    fn end(&mut self) -> Result<(), Error> {
+    fn end(&mut self) -> Result<()> {
         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))
+        match try!(self.de.next_char()) {
+            Some(b']') => { Ok(()) }
+            Some(_) => {
+                Err(self.de.error(ErrorCode::TrailingCharacters))
+            }
+            None => {
+                Err(self.de.error(ErrorCode::EOFWhileParsingList))
+            }
         }
     }
 }
@@ -562,40 +676,45 @@ impl<'a, Iter> de::MapVisitor for MapVisitor<'a, Iter>
 {
     type Error = Error;
 
-    fn visit_key<K>(&mut self) -> Result<Option<K>, Error>
+    fn visit_key<K>(&mut self) -> Result<Option<K>>
         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());
+        match try!(self.de.peek()) {
+            Some(b'}') => {
+                return Ok(None);
+            }
+            Some(b',') if !self.first => {
+                self.de.eat_char();
                 try!(self.de.parse_whitespace());
-            } else if self.de.eof() {
+            }
+            Some(_) => {
+                if self.first {
+                    self.first = false;
+                } else {
+                    return Err(self.de.error(ErrorCode::ExpectedObjectCommaOrEnd));
+                }
+            }
+            None => {
                 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));
+        match try!(self.de.peek()) {
+            Some(b'"') => {
+                Ok(Some(try!(de::Deserialize::deserialize(self.de))))
+            }
+            Some(_) => {
+                Err(self.de.error(ErrorCode::KeyMustBeAString))
+            }
+            None => {
+                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>
+    fn visit_value<V>(&mut self) -> Result<V>
         where V: de::Deserialize,
     {
         try!(self.de.parse_object_colon());
@@ -603,20 +722,21 @@ impl<'a, Iter> de::MapVisitor for MapVisitor<'a, Iter>
         Ok(try!(de::Deserialize::deserialize(self.de)))
     }
 
-    fn end(&mut self) -> Result<(), Error> {
+    fn end(&mut self) -> Result<()> {
         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))
+        match try!(self.de.next_char()) {
+            Some(b'}') => { Ok(()) }
+            Some(_) => {
+                Err(self.de.error(ErrorCode::TrailingCharacters))
+            }
+            None => {
+                Err(self.de.error(ErrorCode::EOFWhileParsingObject))
+            }
         }
     }
 
-    fn missing_field<V>(&mut self, _field: &'static str) -> Result<V, Error>
+    fn missing_field<V>(&mut self, _field: &'static str) -> Result<V>
         where V: de::Deserialize,
     {
         let mut de = de::value::ValueDeserializer::into_deserializer(());
@@ -629,41 +749,47 @@ impl<Iter> de::VariantVisitor for Deserializer<Iter>
 {
     type Error = Error;
 
-    fn visit_variant<V>(&mut self) -> Result<V, Error>
+    fn visit_variant<V>(&mut self) -> Result<V>
         where V: de::Deserialize
     {
-        de::Deserialize::deserialize(self)
-    }
-
-    fn visit_unit(&mut self) -> Result<(), Error> {
+        let val = try!(de::Deserialize::deserialize(self));
         try!(self.parse_object_colon());
+        Ok(val)
+    }
 
+    fn visit_unit(&mut self) -> Result<()> {
         de::Deserialize::deserialize(self)
     }
 
-    fn visit_seq<V>(&mut self, visitor: V) -> Result<V::Value, Error>
+    fn visit_newtype<T>(&mut self) -> Result<T>
+        where T: de::Deserialize,
+    {
+        de::Deserialize::deserialize(self)
+    }
+
+    fn visit_tuple<V>(&mut self,
+                      _len: usize,
+                      visitor: V) -> Result<V::Value>
         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>
+    fn visit_struct<V>(&mut self,
+                       _fields: &'static [&'static str],
+                       visitor: V) -> Result<V::Value>
         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>
+pub fn from_iter<I, T>(iter: I) -> Result<T>
     where I: Iterator<Item=io::Result<u8>>,
           T: de::Deserialize,
 {
-    let mut de = try!(Deserializer::new(iter));
+    let mut de = Deserializer::new(iter);
     let value = try!(de::Deserialize::deserialize(&mut de));
 
     // Make sure the whole stream has been consumed.
@@ -672,7 +798,7 @@ pub fn from_iter<I, T>(iter: I) -> Result<T, Error>
 }
 
 /// Decodes a json value from a `std::io::Read`.
-pub fn from_reader<R, T>(rdr: R) -> Result<T, Error>
+pub fn from_reader<R, T>(rdr: R) -> Result<T>
     where R: io::Read,
           T: de::Deserialize,
 {
@@ -680,14 +806,14 @@ pub fn from_reader<R, T>(rdr: R) -> Result<T, Error>
 }
 
 /// Decodes a json value from a `&str`.
-pub fn from_slice<T>(v: &[u8]) -> Result<T, Error>
+pub fn from_slice<T>(v: &[u8]) -> Result<T>
     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>
+pub fn from_str<T>(s: &str) -> Result<T>
     where T: de::Deserialize
 {
     from_slice(s.as_bytes())

serde_json/src/error.rs

@@ -1,8 +1,9 @@
 use std::error;
 use std::fmt;
 use std::io;
+use std::result;
 
-use de;
+use serde::de;
 
 /// The errors that can arise while parsing a JSON stream.
 #[derive(Clone, PartialEq)]
@@ -151,35 +152,38 @@ impl From<de::value::Error> for Error {
     fn from(error: de::value::Error) -> Error {
         match error {
             de::value::Error::SyntaxError => {
-                de::Error::syntax_error()
+                Error::SyntaxError(ErrorCode::ExpectedSomeValue, 0, 0)
             }
             de::value::Error::EndOfStreamError => {
-                de::Error::end_of_stream_error()
+                de::Error::end_of_stream()
             }
             de::value::Error::UnknownFieldError(field) => {
                 Error::SyntaxError(ErrorCode::UnknownField(field), 0, 0)
             }
             de::value::Error::MissingFieldError(field) => {
-                de::Error::missing_field_error(field)
+                de::Error::missing_field(field)
             }
         }
     }
 }
 
 impl de::Error for Error {
-    fn syntax_error() -> Error {
+    fn syntax(_: &str) -> Error {
         Error::SyntaxError(ErrorCode::ExpectedSomeValue, 0, 0)
     }
 
-    fn end_of_stream_error() -> Error {
+    fn end_of_stream() -> Error {
         Error::SyntaxError(ErrorCode::EOFWhileParsingValue, 0, 0)
     }
 
-    fn unknown_field_error(field: &str) -> Error {
+    fn unknown_field(field: &str) -> Error {
         Error::SyntaxError(ErrorCode::UnknownField(field.to_string()), 0, 0)
     }
 
-    fn missing_field_error(field: &'static str) -> Error {
+    fn missing_field(field: &'static str) -> Error {
         Error::MissingFieldError(field)
     }
 }
+
+/// Helper alias for `Result` objects that return a JSON `Error`.
+pub type Result<T> = result::Result<T, Error>;

serde_json/src/lib.rs

@@ -6,7 +6,7 @@
 //! 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
+//! Data types that can be encoded are JavaScript types (see the `serde_json:Value` enum for more
 //! details):
 //!
 //! * `Boolean`: equivalent to rust's `bool`
@@ -16,7 +16,7 @@
 //! * `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>`
+//! * `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
@@ -48,8 +48,8 @@
 //! `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
+//! 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.
 //!
@@ -61,12 +61,12 @@
 //! //#![feature(custom_derive, plugin)]
 //! //#![plugin(serde_macros)]
 //!
-//! extern crate serde;
+//! extern crate serde_json;
 //!
-//! use serde::json::{self, Value};
+//! use serde_json::Value;
 //!
 //! fn main() {
-//!     let data: Value = json::from_str("{\"foo\": 13, \"bar\": \"baz\"}").unwrap();
+//!     let data: Value = serde_json::from_str("{\"foo\": 13, \"bar\": \"baz\"}").unwrap();
 //!     println!("data: {:?}", data);
 //!     // data: {"bar":"baz","foo":13}
 //!     println!("object? {}", data.is_object());
@@ -92,8 +92,17 @@
 //! }
 //! ```
 
-pub use self::de::{Deserializer, from_str};
-pub use self::error::{Error, ErrorCode};
+extern crate num;
+extern crate serde;
+
+pub use self::de::{
+    Deserializer,
+    from_iter,
+    from_reader,
+    from_slice,
+    from_str,
+};
+pub use self::error::{Error, ErrorCode, Result};
 pub use self::ser::{
     Serializer,
     to_writer,

serde_json/src/ser.rs

@@ -2,7 +2,7 @@ use std::io;
 use std::num::FpCategory;
 use std::string::FromUtf8Error;
 
-use ser;
+use serde::ser;
 
 /// A structure for implementing serialization to JSON.
 pub struct Serializer<W, F=CompactFormatter> {
@@ -158,8 +158,21 @@ impl<W, F> ser::Serializer for Serializer<W, F>
         self.writer.write_all(b"null")
     }
 
+    /// Override `visit_newtype_struct` to serialize newtypes without an object wrapper.
     #[inline]
-    fn visit_enum_unit(&mut self, _name: &str, variant: &str) -> io::Result<()> {
+    fn visit_newtype_struct<T>(&mut self,
+                               _name: &'static str,
+                               value: T) -> Result<(), Self::Error>
+        where T: ser::Serialize,
+    {
+        value.serialize(self)
+    }
+
+    #[inline]
+    fn visit_unit_variant(&mut self,
+                          _name: &str,
+                          _variant_index: usize,
+                          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));
@@ -168,6 +181,22 @@ impl<W, F> ser::Serializer for Serializer<W, F>
         self.formatter.close(&mut self.writer, b'}')
     }
 
+    #[inline]
+    fn visit_newtype_variant<T>(&mut self,
+                                _name: &str,
+                                _variant_index: usize,
+                                variant: &str,
+                                value: T) -> io::Result<()>
+        where T: ser::Serialize,
+    {
+        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!(value.serialize(self));
+        self.formatter.close(&mut self.writer, b'}')
+    }
+
     #[inline]
     fn visit_seq<V>(&mut self, mut visitor: V) -> io::Result<()>
         where V: ser::SeqVisitor,
@@ -190,7 +219,11 @@ impl<W, F> ser::Serializer for Serializer<W, F>
     }
 
     #[inline]
-    fn visit_enum_seq<V>(&mut self, _name: &str, variant: &str, visitor: V) -> io::Result<()>
+    fn visit_tuple_variant<V>(&mut self,
+                              _name: &str,
+                              _variant_index: usize,
+                              variant: &str,
+                              visitor: V) -> io::Result<()>
         where V: ser::SeqVisitor,
     {
         try!(self.formatter.open(&mut self.writer, b'{'));
@@ -206,9 +239,11 @@ impl<W, F> ser::Serializer for Serializer<W, F>
         where T: ser::Serialize,
     {
         try!(self.formatter.comma(&mut self.writer, self.first));
+        try!(value.serialize(self));
+
         self.first = false;
 
-        value.serialize(self)
+        Ok(())
     }
 
     #[inline]
@@ -232,7 +267,11 @@ impl<W, F> ser::Serializer for Serializer<W, F>
     }
 
     #[inline]
-    fn visit_enum_map<V>(&mut self, _name: &str, variant: &str, visitor: V) -> io::Result<()>
+    fn visit_struct_variant<V>(&mut self,
+                               _name: &str,
+                               _variant_index: usize,
+                               variant: &str,
+                               visitor: V) -> io::Result<()>
         where V: ser::MapVisitor,
     {
         try!(self.formatter.open(&mut self.writer, b'{'));
@@ -250,11 +289,14 @@ impl<W, F> ser::Serializer for Serializer<W, F>
               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)
+        try!(value.serialize(self));
+
+        self.first = false;
+
+        Ok(())
     }
 
     #[inline]
@@ -423,12 +465,7 @@ fn fmt_f32_or_null<W>(wr: &mut W, value: f32) -> io::Result<()>
     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(())
+            write!(wr, "{:?}", value)
         }
     }
 }
@@ -439,12 +476,7 @@ fn fmt_f64_or_null<W>(wr: &mut W, value: f64) -> io::Result<()>
     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(())
+            write!(wr, "{:?}", value)
         }
     }
 }

serde_json/src/value.rs

@@ -6,9 +6,10 @@ use std::vec;
 
 use num::NumCast;
 
-use de;
-use ser;
-use super::error::Error;
+use serde::de;
+use serde::ser;
+
+use error::Error;
 
 #[derive(Clone, PartialEq)]
 pub enum Value {
@@ -458,7 +459,10 @@ impl ser::Serializer for Serializer {
     }
 
     #[inline]
-    fn visit_enum_unit(&mut self, _name: &str, variant: &str) -> Result<(), ()> {
+    fn visit_unit_variant(&mut self,
+                          _name: &str,
+                          _variant_index: usize,
+                          variant: &str) -> Result<(), ()> {
         let mut values = BTreeMap::new();
         values.insert(variant.to_string(), Value::Array(vec![]));
 
@@ -467,6 +471,22 @@ impl ser::Serializer for Serializer {
         Ok(())
     }
 
+    #[inline]
+    fn visit_newtype_variant<T>(&mut self,
+                                _name: &str,
+                                _variant_index: usize,
+                                variant: &str,
+                                value: T) -> Result<(), ()>
+        where T: ser::Serialize,
+    {
+        let mut values = BTreeMap::new();
+        values.insert(variant.to_string(), to_value(&value));
+
+        self.state.push(State::Value(Value::Object(values)));
+
+        Ok(())
+    }
+
     #[inline]
     fn visit_seq<V>(&mut self, mut visitor: V) -> Result<(), ()>
         where V: ser::SeqVisitor,
@@ -489,7 +509,11 @@ impl ser::Serializer for Serializer {
     }
 
     #[inline]
-    fn visit_enum_seq<V>(&mut self, _name: &str, variant: &str, visitor: V) -> Result<(), ()>
+    fn visit_tuple_variant<V>(&mut self,
+                              _name: &str,
+                              _variant_index: usize,
+                              variant: &str,
+                              visitor: V) -> Result<(), ()>
         where V: ser::SeqVisitor,
     {
         try!(self.visit_seq(visitor));
@@ -548,7 +572,11 @@ impl ser::Serializer for Serializer {
     }
 
     #[inline]
-    fn visit_enum_map<V>(&mut self, _name: &str, variant: &str, visitor: V) -> Result<(), ()>
+    fn visit_struct_variant<V>(&mut self,
+                               _name: &str,
+                               _variant_index: usize,
+                               variant: &str,
+                               visitor: V) -> Result<(), ()>
         where V: ser::MapVisitor,
     {
         try!(self.visit_map(visitor));
@@ -622,7 +650,7 @@ impl de::Deserializer for Deserializer {
     {
         let value = match self.value.take() {
             Some(value) => value,
-            None => { return Err(de::Error::end_of_stream_error()); }
+            None => { return Err(de::Error::end_of_stream()); }
         };
 
         match value {
@@ -659,58 +687,121 @@ impl de::Deserializer for Deserializer {
         match self.value {
             Some(Value::Null) => visitor.visit_none(),
             Some(_) => visitor.visit_some(self),
-            None => Err(de::Error::end_of_stream_error()),
+            None => Err(de::Error::end_of_stream()),
         }
     }
 
     #[inline]
-    fn visit_enum<V>(&mut self, _name: &str, mut visitor: V) -> Result<V::Value, Error>
+    fn visit_enum<V>(&mut self,
+                     _name: &str,
+                     _variants: &'static [&'static 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()); }
+            Some(_) => { return Err(de::Error::syntax("expected an enum")); }
+            None => { return Err(de::Error::end_of_stream()); }
         };
 
         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()); }
+        let (variant, value) = match iter.next() {
+            Some(v) => v,
+            None => return Err(de::Error::syntax("expected a variant name")),
         };
 
+        // enums are encoded in json as maps with a single key:value pair
         match iter.next() {
-            Some(_) => Err(de::Error::syntax_error()),
-            None => Ok(value)
+            Some(_) => Err(de::Error::syntax("expected map")),
+            None => visitor.visit(VariantDeserializer {
+                de: self,
+                val: Some(value),
+                variant: Some(Value::String(variant)),
+            }),
         }
     }
 
+    #[inline]
+    fn visit_newtype_struct<V>(&mut self,
+                               _name: &'static str,
+                               mut visitor: V) -> Result<V::Value, Self::Error>
+        where V: de::Visitor,
+    {
+        visitor.visit_newtype_struct(self)
+    }
+
     #[inline]
     fn format() -> &'static str {
         "json"
     }
 }
 
+struct VariantDeserializer<'a> {
+    de: &'a mut Deserializer,
+    val: Option<Value>,
+    variant: Option<Value>,
+}
+
+impl<'a> de::VariantVisitor for VariantDeserializer<'a> {
+    type Error = Error;
+
+    fn visit_variant<V>(&mut self) -> Result<V, Error>
+        where V: de::Deserialize,
+    {
+        de::Deserialize::deserialize(&mut Deserializer::new(self.variant.take().unwrap()))
+    }
+
+    fn visit_unit(&mut self) -> Result<(), Error> {
+        de::Deserialize::deserialize(&mut Deserializer::new(self.val.take().unwrap()))
+    }
+
+    fn visit_newtype<T>(&mut self) -> Result<T, Error>
+        where T: de::Deserialize,
+    {
+        de::Deserialize::deserialize(&mut Deserializer::new(self.val.take().unwrap()))
+    }
+
+    fn visit_tuple<V>(&mut self,
+                      _len: usize,
+                      visitor: V) -> Result<V::Value, Error>
+        where V: de::Visitor,
+    {
+        if let Value::Array(fields) = self.val.take().unwrap() {
+            de::Deserializer::visit(
+                &mut SeqDeserializer {
+                    de: self.de,
+                    len: fields.len(),
+                    iter: fields.into_iter(),
+                },
+                visitor,
+            )
+        } else {
+            Err(de::Error::syntax("expected a tuple"))
+        }
+    }
+
+    fn visit_struct<V>(&mut self,
+                       _fields: &'static[&'static str],
+                       visitor: V) -> Result<V::Value, Error>
+        where V: de::Visitor,
+    {
+        if let Value::Object(fields) = self.val.take().unwrap() {
+            de::Deserializer::visit(
+                &mut MapDeserializer {
+                    de: self.de,
+                    len: fields.len(),
+                    iter: fields.into_iter(),
+                    value: None,
+                },
+                visitor,
+            )
+        } else {
+            Err(de::Error::syntax("expected a struct"))
+        }
+    }
+}
+
 struct SeqDeserializer<'a> {
     de: &'a mut Deserializer,
     iter: vec::IntoIter<Value>,
@@ -752,7 +843,7 @@ impl<'a> de::SeqVisitor for SeqDeserializer<'a> {
         if self.len == 0 {
             Ok(())
         } else {
-            Err(de::Error::end_of_stream_error())
+            Err(de::Error::length_mismatch(self.len))
         }
     }
 
@@ -761,33 +852,6 @@ impl<'a> de::SeqVisitor for SeqDeserializer<'a> {
     }
 }
 
-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>,
@@ -824,7 +888,7 @@ impl<'a> de::MapVisitor for MapDeserializer<'a> {
         if self.len == 0 {
             Ok(())
         } else {
-            Err(de::Error::end_of_stream_error())
+            Err(de::Error::length_mismatch(self.len))
         }
     }
 
@@ -865,38 +929,10 @@ impl<'a> de::Deserializer for MapDeserializer<'a> {
     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

serde_macros/Cargo.toml

@@ -1,10 +1,12 @@
 [package]
 name = "serde_macros"
-version = "0.4.1"
+version = "0.5.1"
 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"
+repository = "https://github.com/serde-rs/serde"
+documentation = "https://github.com/serde-rs/serde"
+keywords = ["serde", "serialization"]
 
 [lib]
 name = "serde_macros"
@@ -16,4 +18,5 @@ serde_codegen = { version = "*", path = "../serde_codegen", default-features = f
 [dev-dependencies]
 num = "*"
 rustc-serialize = "*"
-serde = { version = "*", path = "../serde" }
+serde = { version = "*", path = "../serde", features = ["nightly"] }
+serde_json = { version = "*", path = "../serde_json" }

serde_macros/benches/bench.rs

@@ -4,6 +4,7 @@
 extern crate num;
 extern crate rustc_serialize;
 extern crate serde;
+extern crate serde_json;
 extern crate test;
 
 include!("../../serde_tests/benches/bench.rs.in");

serde_macros/examples/json.rs

@@ -2,9 +2,9 @@
 #![plugin(serde_macros)]
 
 extern crate serde;
+extern crate serde_json;
 
 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.
@@ -18,7 +18,7 @@ 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();
+    let serialized_point = serde_json::to_string(&point).unwrap();
 
     println!("{}", serialized_point);
     // prints:
@@ -26,7 +26,7 @@ fn main() {
     // {"x":5,"y":6}
 
     // There is also support for pretty printing using `to_string_pretty`:
-    let serialized_point = json::to_string_pretty(&point).unwrap();
+    let serialized_point = serde_json::to_string_pretty(&point).unwrap();
 
     println!("{}", serialized_point);
     // prints:
@@ -37,7 +37,7 @@ fn main() {
     // }
 
     // Values can also be deserialized with the same style using `from_str`:
-    let deserialized_point: Point = json::from_str(&serialized_point).unwrap();
+    let deserialized_point: Point = serde_json::from_str(&serialized_point).unwrap();
 
     println!("{:?}", deserialized_point);
     // prints:
@@ -46,16 +46,18 @@ fn main() {
 
     // `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();
+    let deserialized_map: BTreeMap<String, i64> =
+        serde_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();
+    // If you need to accept arbitrary data, you can also deserialize into `serde_json::Value`,
+    // which can represent all JSON values.
+    let deserialized_value: serde_json::Value =
+        serde_json::from_str(&serialized_point).unwrap();
 
     println!("{:?}", deserialized_value);
     // prints:

serde_macros/tests/test.rs

@@ -2,6 +2,7 @@
 #![plugin(serde_macros)]
 
 extern crate serde;
+extern crate serde_json;
 extern crate test;
 
 include!("../../serde_tests/tests/test.rs.in");

serde_tests/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "serde_tests"
-version = "0.4.1"
+version = "0.5.0"
 authors = ["Erick Tryzelaar <erick.tryzelaar@gmail.com>"]
 license = "MIT/Apache-2.0"
 description = "A generic serialization/deserialization framework"
@@ -11,7 +11,7 @@ keywords = ["serialization"]
 build = "build.rs"
 
 [build-dependencies]
-syntex = { version = "*", optional = true }
+syntex = { version = "*" }
 syntex_syntax = { version = "*" }
 serde_codegen = { version = "*", path = "../serde_codegen", features = ["with-syntex"] }
 
@@ -19,6 +19,7 @@ serde_codegen = { version = "*", path = "../serde_codegen", features = ["with-sy
 num = "*"
 rustc-serialize = "*"
 serde = { version = "*", path = "../serde" }
+serde_json = { version = "*", path = "../serde_json" }
 syntex = "*"
 
 [[test]]

serde_tests/benches/bench.rs

@@ -3,6 +3,7 @@
 extern crate num;
 extern crate rustc_serialize;
 extern crate serde;
+extern crate serde_json;
 extern crate test;
 
 include!(concat!(env!("OUT_DIR"), "/bench.rs"));

serde_tests/benches/bench_enum.rs

@@ -20,13 +20,13 @@ pub enum Error {
 }
 
 impl serde::de::Error for Error {
-    fn syntax_error() -> Error { Error::SyntaxError }
+    fn syntax(_: &str) -> Error { Error::SyntaxError }
 
-    fn end_of_stream_error() -> Error { Error::EndOfStreamError }
+    fn end_of_stream() -> Error { Error::EndOfStreamError }
 
-    fn unknown_field_error(_: &str) -> Error { Error::SyntaxError }
+    fn unknown_field(_: &str) -> Error { Error::SyntaxError }
 
-    fn missing_field_error(_: &'static str) -> Error { Error::SyntaxError }
+    fn missing_field(_: &'static str) -> Error { Error::SyntaxError }
 }
 
 //////////////////////////////////////////////////////////////////////////////
@@ -288,7 +288,10 @@ mod deserializer {
         }
 
         #[inline]
-        fn visit_enum<V>(&mut self, _name: &str, mut visitor: V) -> Result<V::Value, Error>
+        fn visit_enum<V>(&mut self,
+                         _name: &str,
+                         _variants: &[&str],
+                         mut visitor: V) -> Result<V::Value, Error>
             where V: de::EnumVisitor,
         {
             match self.stack.pop() {
@@ -350,7 +353,9 @@ mod deserializer {
             de::Deserialize::deserialize(self.de)
         }
 
-        fn visit_seq<V>(&mut self, mut visitor: V) -> Result<V::Value, Error>
+        fn visit_tuple<V>(&mut self,
+                          _len: usize,
+                          mut visitor: V) -> Result<V::Value, Error>
             where V: de::Visitor,
         {
             visitor.visit_seq(self)

serde_tests/benches/bench_log.rs

@@ -5,9 +5,9 @@ use test::Bencher;
 use rustc_serialize;
 
 use serde::de::{self, Deserialize, Deserializer};
-use serde::json::ser::escape_str;
-use serde::json;
 use serde::ser::{self, Serialize, Serializer};
+use serde_json::ser::escape_str;
+use serde_json;
 use std::str::FromStr;
 
 use rustc_serialize::Encodable;
@@ -50,7 +50,7 @@ impl rustc_serialize::Decodable for HttpProtocol {
 
 impl FromStr for HttpProtocol {
     type Err = ();
-    fn from_str(s: &str) -> Result<HttpProtocol, ()> { unimplemented!() }
+    fn from_str(_s: &str) -> Result<HttpProtocol, ()> { unimplemented!() }
 }
 
 impl FromPrimitive for HttpProtocol {
@@ -104,7 +104,7 @@ enum HttpMethod {
 
 impl FromStr for HttpMethod {
     type Err = ();
-    fn from_str(s: &str) -> Result<HttpMethod, ()> { unimplemented!() }
+    fn from_str(_s: &str) -> Result<HttpMethod, ()> { unimplemented!() }
 }
 
 impl FromPrimitive for HttpMethod {
@@ -174,7 +174,7 @@ enum CacheStatus {
 
 impl FromStr for CacheStatus {
     type Err = ();
-    fn from_str(s: &str) -> Result<CacheStatus, ()> { unimplemented!() }
+    fn from_str(_s: &str) -> Result<CacheStatus, ()> { unimplemented!() }
 }
 
 impl FromPrimitive for CacheStatus {
@@ -244,7 +244,7 @@ enum OriginProtocol {
 
 impl FromStr for OriginProtocol {
     type Err = ();
-    fn from_str(s: &str) -> Result<OriginProtocol, ()> { unimplemented!() }
+    fn from_str(_s: &str) -> Result<OriginProtocol, ()> { unimplemented!() }
 }
 
 impl FromPrimitive for OriginProtocol {
@@ -307,7 +307,7 @@ enum ZonePlan {
 
 impl FromStr for ZonePlan {
     type Err = ();
-    fn from_str(s: &str) -> Result<ZonePlan, ()> { unimplemented!() }
+    fn from_str(_s: &str) -> Result<ZonePlan, ()> { unimplemented!() }
 }
 
 impl FromPrimitive for ZonePlan {
@@ -622,7 +622,7 @@ enum Country {
 
 impl FromStr for Country {
     type Err = ();
-    fn from_str(s: &str) -> Result<Country, ()> { unimplemented!() }
+    fn from_str(_s: &str) -> Result<Country, ()> { unimplemented!() }
 }
 
 impl FromPrimitive for Country {
@@ -1123,18 +1123,18 @@ fn bench_encoder(b: &mut Bencher) {
 #[test]
 fn test_serializer() {
     let log = Log::new();
-    let json = json::to_vec(&log);
+    let json = serde_json::to_vec(&log);
     assert_eq!(json, JSON_STR.as_bytes());
 }
 
 #[bench]
 fn bench_serializer(b: &mut Bencher) {
     let log = Log::new();
-    let json = json::to_vec(&log);
+    let json = serde_json::to_vec(&log);
     b.bytes = json.len() as u64;
 
     b.iter(|| {
-        let _ = json::to_vec(&log);
+        let _ = serde_json::to_vec(&log);
     });
 }
 
@@ -1142,7 +1142,7 @@ fn bench_serializer(b: &mut Bencher) {
 fn test_serializer_vec() {
     let log = Log::new();
     let wr = Vec::with_capacity(1024);
-    let mut serializer = json::Serializer::new(wr);
+    let mut serializer = serde_json::Serializer::new(wr);
     log.serialize(&mut serializer).unwrap();
 
     let json = serializer.into_inner();
@@ -1152,7 +1152,7 @@ fn test_serializer_vec() {
 #[bench]
 fn bench_serializer_vec(b: &mut Bencher) {
     let log = Log::new();
-    let json = json::to_vec(&log);
+    let json = serde_json::to_vec(&log);
     b.bytes = json.len() as u64;
 
     let mut wr = Vec::with_capacity(1024);
@@ -1160,7 +1160,7 @@ fn bench_serializer_vec(b: &mut Bencher) {
     b.iter(|| {
         wr.clear();
 
-        let mut serializer = json::Serializer::new(wr.by_ref());
+        let mut serializer = serde_json::Serializer::new(wr.by_ref());
         log.serialize(&mut serializer).unwrap();
         let _json = serializer.into_inner();
     });
@@ -1169,7 +1169,7 @@ fn bench_serializer_vec(b: &mut Bencher) {
 #[bench]
 fn bench_serializer_slice(b: &mut Bencher) {
     let log = Log::new();
-    let json = json::to_vec(&log);
+    let json = serde_json::to_vec(&log);
     b.bytes = json.len() as u64;
 
     let mut buf = [0; 1024];
@@ -1178,7 +1178,7 @@ fn bench_serializer_slice(b: &mut Bencher) {
         for item in buf.iter_mut(){ *item = 0; }
         let mut wr = &mut buf[..];
 
-        let mut serializer = json::Serializer::new(wr.by_ref());
+        let mut serializer = serde_json::Serializer::new(wr.by_ref());
         log.serialize(&mut serializer).unwrap();
         let _json = serializer.into_inner();
     });
@@ -1191,7 +1191,7 @@ fn test_serializer_my_mem_writer0() {
     let mut wr = MyMemWriter0::with_capacity(1024);
 
     {
-        let mut serializer = json::Serializer::new(wr.by_ref());
+        let mut serializer = serde_json::Serializer::new(wr.by_ref());
         log.serialize(&mut serializer).unwrap();
         let _json = serializer.into_inner();
     }
@@ -1202,7 +1202,7 @@ fn test_serializer_my_mem_writer0() {
 #[bench]
 fn bench_serializer_my_mem_writer0(b: &mut Bencher) {
     let log = Log::new();
-    let json = json::to_vec(&log);
+    let json = serde_json::to_vec(&log);
     b.bytes = json.len() as u64;
 
     let mut wr = MyMemWriter0::with_capacity(1024);
@@ -1210,7 +1210,7 @@ fn bench_serializer_my_mem_writer0(b: &mut Bencher) {
     b.iter(|| {
         wr.buf.clear();
 
-        let mut serializer = json::Serializer::new(wr.by_ref());
+        let mut serializer = serde_json::Serializer::new(wr.by_ref());
         log.serialize(&mut serializer).unwrap();
         let _json = serializer.into_inner();
     });
@@ -1223,7 +1223,7 @@ fn test_serializer_my_mem_writer1() {
     let mut wr = MyMemWriter1::with_capacity(1024);
 
     {
-        let mut serializer = json::Serializer::new(wr.by_ref());
+        let mut serializer = serde_json::Serializer::new(wr.by_ref());
         log.serialize(&mut serializer).unwrap();
         let _json = serializer.into_inner();
     }
@@ -1234,7 +1234,7 @@ fn test_serializer_my_mem_writer1() {
 #[bench]
 fn bench_serializer_my_mem_writer1(b: &mut Bencher) {
     let log = Log::new();
-    let json = json::to_vec(&log);
+    let json = serde_json::to_vec(&log);
     b.bytes = json.len() as u64;
 
     let mut wr = MyMemWriter1::with_capacity(1024);
@@ -1242,7 +1242,7 @@ fn bench_serializer_my_mem_writer1(b: &mut Bencher) {
     b.iter(|| {
         wr.buf.clear();
 
-        let mut serializer = json::Serializer::new(wr.by_ref());
+        let mut serializer = serde_json::Serializer::new(wr.by_ref());
         log.serialize(&mut serializer).unwrap();
         let _json = serializer.into_inner();
     });
@@ -1593,6 +1593,6 @@ fn bench_deserializer(b: &mut Bencher) {
     b.bytes = JSON_STR.len() as u64;
 
     b.iter(|| {
-        let _log: Log = json::from_str(JSON_STR).unwrap();
+        let _log: Log = serde_json::from_str(JSON_STR).unwrap();
     });
 }

serde_tests/benches/bench_map.rs

@@ -17,13 +17,13 @@ pub enum Error {
 }
 
 impl serde::de::Error for Error {
-    fn syntax_error() -> Error { Error::SyntaxError }
+    fn syntax(_: &str) -> Error { Error::SyntaxError }
 
-    fn end_of_stream_error() -> Error { Error::EndOfStream }
+    fn end_of_stream() -> Error { Error::EndOfStream }
 
-    fn unknown_field_error(_: &str) -> Error { Error::SyntaxError }
+    fn unknown_field(_: &str) -> Error { Error::SyntaxError }
 
-    fn missing_field_error(_: &'static str) -> Error {
+    fn missing_field(_: &'static str) -> Error {
         Error::MissingField
     }
 }
@@ -347,17 +347,17 @@ mod deserializer {
 
     impl de::Deserializer<Error> for IsizeDeserializer {
         #[inline]
-        fn end_of_stream_error(&mut self) -> Error {
+        fn end_of_stream(&mut self) -> Error {
             EndOfStream
         }
 
         #[inline]
-        fn syntax_error(&mut self, _token: de::Token, _expected: &[de::TokenKind]) -> Error {
+        fn syntax(&mut self, _token: de::Token, _expected: &[de::TokenKind]) -> Error {
             SyntaxError
         }
 
         #[inline]
-        fn unexpected_name_error(&mut self, _token: de::Token) -> Error {
+        fn unexpected_name(&mut self, _token: de::Token) -> Error {
             SyntaxError
         }
 

serde_tests/benches/bench_struct.rs

@@ -33,13 +33,13 @@ pub enum Error {
 }
 
 impl serde::de::Error for Error {
-    fn syntax_error() -> Error { Error::SyntaxError }
+    fn syntax(_: &str) -> Error { Error::SyntaxError }
 
-    fn end_of_stream_error() -> Error { Error::EndOfStream }
+    fn end_of_stream() -> Error { Error::EndOfStream }
 
-    fn unknown_field_error(_: &str) -> Error { Error::SyntaxError }
+    fn unknown_field(_: &str) -> Error { Error::SyntaxError }
 
-    fn missing_field_error(_: &'static str) -> Error {
+    fn missing_field(_: &'static str) -> Error {
         Error::MissingField
     }
 }
@@ -398,7 +398,10 @@ mod deserializer {
             }
         }
 
-        fn visit_named_map<V>(&mut self, name: &str, mut visitor: V) -> Result<V::Value, Error>
+        fn visit_struct<V>(&mut self,
+                           name: &str,
+                           _fields: &'static [&'static str],
+                           mut visitor: V) -> Result<V::Value, Error>
             where V: de::Visitor,
         {
             match self.stack.pop() {

serde_tests/benches/bench_vec.rs

@@ -15,13 +15,13 @@ pub enum Error {
 }
 
 impl serde::de::Error for Error {
-    fn syntax_error() -> Error { Error::SyntaxError }
+    fn syntax(_: &str) -> Error { Error::SyntaxError }
 
-    fn end_of_stream_error() -> Error { Error::EndOfStreamError }
+    fn end_of_stream() -> Error { Error::EndOfStreamError }
 
-    fn unknown_field_error(_: &str) -> Error { Error::SyntaxError }
+    fn unknown_field(_: &str) -> Error { Error::SyntaxError }
 
-    fn missing_field_error(_: &'static str) -> Error { Error::SyntaxError }
+    fn missing_field(_: &'static str) -> Error { Error::SyntaxError }
 }
 
 //////////////////////////////////////////////////////////////////////////////

serde_tests/tests/test.rs

@@ -1,3 +1,4 @@
 extern crate serde;
+extern crate serde_json;
 
 include!(concat!(env!("OUT_DIR"), "/test.rs"));

serde_tests/tests/test.rs.in

@@ -1,11 +1,7 @@
-/*
 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

@@ -1,4 +1,5 @@
-use serde::json;
+use std::default;
+use serde_json;
 
 #[derive(Debug, PartialEq, Serialize, Deserialize)]
 struct Default {
@@ -30,33 +31,39 @@ enum SerEnum<A> {
     },
 }
 
+#[derive(Debug, PartialEq, Deserialize, Serialize)]
+struct SkipSerializingFields<A: default::Default> {
+    a: i8,
+    #[serde(skip_serializing, default)]
+    b: A,
+}
 
 #[test]
 fn test_default() {
-    let deserialized_value: Default = json::from_str(&"{\"a1\":1,\"a2\":2}").unwrap();
+    let deserialized_value: Default = serde_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();
+    let deserialized_value: Default = serde_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();
+    let serialized_value = serde_json::to_string(&value).unwrap();
     assert_eq!(serialized_value, "{\"a1\":1,\"a3\":2}");
 
-    let deserialized_value: Rename = json::from_str(&serialized_value).unwrap();
+    let deserialized_value: Rename = serde_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();
+    let serialized_value = serde_json::to_string(&value).unwrap();
     assert_eq!(serialized_value, "{\"a1\":1,\"a5\":2}");
 
-    let deserialized_value = json::from_str("{\"a1\":1,\"a5\":2}").unwrap();
+    let deserialized_value = serde_json::from_str("{\"a1\":1,\"a5\":2}").unwrap();
     assert_eq!(value, deserialized_value);
 }
 
@@ -64,10 +71,20 @@ fn test_format_rename() {
 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 serialized_value = serde_json::to_string(&value).unwrap();
     let ans = "{\"Map\":{\"a\":0,\"d\":\"\"}}";
     assert_eq!(serialized_value, ans);
 
-    let deserialized_value = json::from_str(ans).unwrap();
+    let deserialized_value = serde_json::from_str(ans).unwrap();
     assert_eq!(value, deserialized_value);
 }
+
+#[test]
+fn test_skip_serializing_fields() {
+    let value = SkipSerializingFields { a: 1, b: 2 };
+    let serialized_value = serde_json::to_string(&value).unwrap();
+    assert_eq!(serialized_value, "{\"a\":1}");
+
+    let deserialized_value: SkipSerializingFields<_> = serde_json::from_str(&serialized_value).unwrap();
+    assert_eq!(SkipSerializingFields { a: 1, b: 0 }, deserialized_value);
+}

serde_tests/tests/test_bytes.rs

@@ -1,7 +1,7 @@
 use serde;
 use serde::Serialize;
 use serde::bytes::{ByteBuf, Bytes};
-use serde::json;
+use serde_json;
 
 ///////////////////////////////////////////////////////////////////////////////
 
@@ -9,13 +9,13 @@ use serde::json;
 struct Error;
 
 impl serde::de::Error for Error {
-    fn syntax_error() -> Error { Error }
+    fn syntax(_: &str) -> Error { Error }
 
-    fn end_of_stream_error() -> Error { Error }
+    fn end_of_stream() -> Error { Error }
 
-    fn unknown_field_error(_field: &str) -> Error { Error }
+    fn unknown_field(_field: &str) -> Error { Error }
 
-    fn missing_field_error(_field: &'static str) -> Error { Error }
+    fn missing_field(_field: &'static str) -> Error { Error }
 }
 
 ///////////////////////////////////////////////////////////////////////////////
@@ -144,11 +144,11 @@ impl serde::Deserializer for BytesDeserializer {
 fn test_bytes_ser_json() {
     let buf = vec![];
     let bytes = Bytes::from(&buf);
-    assert_eq!(json::to_string(&bytes).unwrap(), "[]".to_string());
+    assert_eq!(serde_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());
+    assert_eq!(serde_json::to_string(&bytes).unwrap(), "[1,2,3]".to_string());
 }
 
 #[test]
@@ -167,10 +167,10 @@ fn test_bytes_ser_bytes() {
 #[test]
 fn test_byte_buf_ser_json() {
     let bytes = ByteBuf::new();
-    assert_eq!(json::to_string(&bytes).unwrap(), "[]".to_string());
+    assert_eq!(serde_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());
+    assert_eq!(serde_json::to_string(&bytes).unwrap(), "[1,2,3]".to_string());
 }
 
 #[test]
@@ -189,11 +189,11 @@ fn test_byte_buf_ser_bytes() {
 #[test]
 fn test_byte_buf_de_json() {
     let bytes = ByteBuf::new();
-    let v: ByteBuf = json::from_str("[]").unwrap();
+    let v: ByteBuf = serde_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();
+    let v: ByteBuf = serde_json::from_str("[1, 2, 3]").unwrap();
     assert_eq!(v, bytes);
 }
 

serde_tests/tests/test_de.rs

@@ -22,6 +22,7 @@ enum Token {
     Char(char),
     Str(&'static str),
     String(String),
+    Bytes(&'static [u8]),
 
     Option(bool),
 
@@ -38,6 +39,10 @@ enum Token {
     MapEnd,
 
     EnumStart(&'static str),
+    EnumUnit,
+    EnumNewtype,
+    EnumSeq,
+    EnumMap,
     EnumEnd,
 }
 
@@ -63,15 +68,15 @@ enum Error {
 }
 
 impl de::Error for Error {
-    fn syntax_error() -> Error { Error::SyntaxError }
+    fn syntax(_: &str) -> Error { Error::SyntaxError }
 
-    fn end_of_stream_error() -> Error { Error::EndOfStreamError }
+    fn end_of_stream() -> Error { Error::EndOfStreamError }
 
-    fn unknown_field_error(field: &str) -> Error {
+    fn unknown_field(field: &str) -> Error {
         Error::UnknownFieldError(field.to_string())
     }
 
-    fn missing_field_error(field: &'static str) -> Error {
+    fn missing_field(field: &'static str) -> Error {
         Error::MissingFieldError(field)
     }
 }
@@ -99,6 +104,7 @@ impl Deserializer for TokenDeserializer {
             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::Option(false)) => visitor.visit_none(),
             Some(Token::Option(true)) => visitor.visit_some(self),
             Some(Token::Unit) => visitor.visit_unit(),
@@ -143,7 +149,10 @@ impl Deserializer for TokenDeserializer {
         }
     }
 
-    fn visit_enum<V>(&mut self, name: &str, mut visitor: V) -> Result<V::Value, Error>
+    fn visit_enum<V>(&mut self,
+                     name: &str,
+                     _variants: &'static [&'static str],
+                     mut visitor: V) -> Result<V::Value, Error>
         where V: de::EnumVisitor,
     {
         match self.tokens.next() {
@@ -161,7 +170,7 @@ impl Deserializer for TokenDeserializer {
         }
     }
 
-    fn visit_named_unit<V>(&mut self, name: &str, visitor: V) -> Result<V::Value, Error>
+    fn visit_unit_struct<V>(&mut self, name: &str, visitor: V) -> Result<V::Value, Error>
         where V: de::Visitor,
     {
         match self.tokens.peek() {
@@ -178,7 +187,10 @@ impl Deserializer for TokenDeserializer {
         }
     }
 
-    fn visit_named_seq<V>(&mut self, name: &str, visitor: V) -> Result<V::Value, Error>
+    fn visit_tuple_struct<V>(&mut self,
+                             name: &str,
+                             _len: usize,
+                             visitor: V) -> Result<V::Value, Error>
         where V: de::Visitor,
     {
         match self.tokens.peek() {
@@ -195,7 +207,10 @@ impl Deserializer for TokenDeserializer {
         }
     }
 
-    fn visit_named_map<V>(&mut self, name: &str, visitor: V) -> Result<V::Value, Error>
+    fn visit_struct<V>(&mut self,
+                       name: &str,
+                       _fields: &'static [&'static str],
+                       visitor: V) -> Result<V::Value, Error>
         where V: de::Visitor,
     {
         match self.tokens.peek() {
@@ -315,32 +330,66 @@ impl<'a> de::VariantVisitor for TokenDeserializerVariantVisitor<'a> {
     }
 
     fn visit_unit(&mut self) -> Result<(), Error> {
-        de::Deserialize::deserialize(self.de)
+        match self.de.tokens.next() {
+            Some(Token::EnumUnit) => {
+                de::Deserialize::deserialize(self.de)
+            }
+            Some(_) => Err(Error::SyntaxError),
+            None => Err(Error::EndOfStreamError),
+        }
     }
 
-    fn visit_seq<V>(&mut self, visitor: V) -> Result<V::Value, Error>
-        where V: de::Visitor,
+    fn visit_newtype<T>(&mut self) -> Result<T, Self::Error>
+        where T: de::Deserialize,
     {
-        de::Deserializer::visit(self.de, visitor)
+        match self.de.tokens.next() {
+            Some(Token::EnumNewtype) => {
+                de::Deserialize::deserialize(self.de)
+            }
+            Some(_) => Err(Error::SyntaxError),
+            None => Err(Error::EndOfStreamError),
+        }
     }
 
-    fn visit_map<V>(&mut self, visitor: V) -> Result<V::Value, Error>
+    fn visit_tuple<V>(&mut self,
+                      _len: usize,
+                      visitor: V) -> Result<V::Value, Error>
         where V: de::Visitor,
     {
-        de::Deserializer::visit(self.de, visitor)
+        match self.de.tokens.next() {
+            Some(Token::EnumSeq) => {
+                de::Deserializer::visit(self.de, visitor)
+            }
+            Some(_) => Err(Error::SyntaxError),
+            None => Err(Error::EndOfStreamError),
+        }
+    }
+
+    fn visit_struct<V>(&mut self,
+                       _fields: &'static [&'static str],
+                       visitor: V) -> Result<V::Value, Error>
+        where V: de::Visitor,
+    {
+        match self.de.tokens.next() {
+            Some(Token::EnumMap) => {
+                de::Deserializer::visit(self.de, visitor)
+            }
+            Some(_) => Err(Error::SyntaxError),
+            None => Err(Error::EndOfStreamError),
+        }
     }
 }
 
 //////////////////////////////////////////////////////////////////////////
 
 #[derive(Copy, Clone, PartialEq, Debug, Deserialize)]
-struct NamedUnit;
+struct UnitStruct;
 
 #[derive(PartialEq, Debug, Deserialize)]
-struct NamedSeq(i32, i32, i32);
+struct TupleStruct(i32, i32, i32);
 
 #[derive(PartialEq, Debug, Deserialize)]
-struct NamedMap {
+struct Struct {
     a: i32,
     b: i32,
     c: i32,
@@ -349,6 +398,7 @@ struct NamedMap {
 #[derive(PartialEq, Debug, Deserialize)]
 enum Enum {
     Unit,
+    Simple(i32),
     Seq(i32, i32, i32),
     Map { a: i32, b: i32, c: i32 }
 }
@@ -486,6 +536,24 @@ declare_tests! {
             Token::I32(1),
         ],
     }
+    test_result {
+        Ok::<i32, i32>(0) => vec![
+            Token::EnumStart("Result"),
+                Token::Str("Ok"),
+
+                Token::EnumNewtype,
+                Token::I32(0),
+            Token::SeqEnd,
+        ],
+        Err::<i32, i32>(1) => vec![
+            Token::EnumStart("Result"),
+                Token::Str("Err"),
+
+                Token::EnumNewtype,
+                Token::I32(1),
+            Token::SeqEnd,
+        ],
+    }
     test_unit {
         () => vec![Token::Unit],
         () => vec![
@@ -498,19 +566,19 @@ declare_tests! {
             Token::SeqEnd,
         ],
     }
-    test_named_unit {
-        NamedUnit => vec![Token::Unit],
-        NamedUnit => vec![
-            Token::Name("NamedUnit"),
+    test_unit_struct {
+        UnitStruct => vec![Token::Unit],
+        UnitStruct => vec![
+            Token::Name("UnitStruct"),
             Token::Unit,
         ],
-        NamedUnit => vec![
+        UnitStruct => vec![
             Token::SeqStart(0),
             Token::SeqEnd,
         ],
     }
-    test_named_seq {
-        NamedSeq(1, 2, 3) => vec![
+    test_tuple_struct {
+        TupleStruct(1, 2, 3) => vec![
             Token::SeqStart(3),
                 Token::SeqSep,
                 Token::I32(1),
@@ -522,8 +590,8 @@ declare_tests! {
                 Token::I32(3),
             Token::SeqEnd,
         ],
-        NamedSeq(1, 2, 3) => vec![
-            Token::Name("NamedSeq"),
+        TupleStruct(1, 2, 3) => vec![
+            Token::Name("TupleStruct"),
             Token::SeqStart(3),
                 Token::SeqSep,
                 Token::I32(1),
@@ -818,8 +886,8 @@ declare_tests! {
             Token::MapEnd,
         ],
     }
-    test_named_map {
-        NamedMap { a: 1, b: 2, c: 3 } => vec![
+    test_struct {
+        Struct { a: 1, b: 2, c: 3 } => vec![
             Token::MapStart(3),
                 Token::MapSep,
                 Token::Str("a"),
@@ -834,8 +902,8 @@ declare_tests! {
                 Token::I32(3),
             Token::MapEnd,
         ],
-        NamedMap { a: 1, b: 2, c: 3 } => vec![
-            Token::Name("NamedMap"),
+        Struct { a: 1, b: 2, c: 3 } => vec![
+            Token::Name("Struct"),
             Token::MapStart(3),
                 Token::MapSep,
                 Token::Str("a"),
@@ -855,14 +923,28 @@ declare_tests! {
         Enum::Unit => vec![
             Token::EnumStart("Enum"),
                 Token::Str("Unit"),
+
+                Token::EnumUnit,
                 Token::Unit,
             Token::EnumEnd,
         ],
     }
+    test_enum_simple {
+        Enum::Simple(1) => vec![
+            Token::EnumStart("Enum"),
+                Token::Str("Simple"),
+
+                Token::EnumNewtype,
+                Token::I32(1),
+            Token::EnumEnd,
+        ],
+    }
     test_enum_seq {
         Enum::Seq(1, 2, 3) => vec![
             Token::EnumStart("Enum"),
                 Token::Str("Seq"),
+
+                Token::EnumSeq,
                 Token::SeqStart(3),
                     Token::SeqSep,
                     Token::I32(1),
@@ -880,6 +962,8 @@ declare_tests! {
         Enum::Map { a: 1, b: 2, c: 3 } => vec![
             Token::EnumStart("Enum"),
                 Token::Str("Map"),
+
+                Token::EnumMap,
                 Token::MapStart(3),
                     Token::MapSep,
                     Token::Str("a"),
@@ -896,4 +980,24 @@ declare_tests! {
             Token::EnumEnd,
         ],
     }
+    test_enum_unit_usize {
+        Enum::Unit => vec![
+            Token::EnumStart("Enum"),
+                Token::Usize(0),
+
+                Token::EnumUnit,
+                Token::Unit,
+            Token::EnumEnd,
+        ],
+    }
+    test_enum_unit_bytes {
+        Enum::Unit => vec![
+            Token::EnumStart("Enum"),
+                Token::Bytes(b"Unit"),
+
+                Token::EnumUnit,
+                Token::Unit,
+            Token::EnumEnd,
+        ],
+    }
 }

serde_tests/tests/test_json.rs

@@ -1,10 +1,14 @@
-use std::fmt::Debug;
 use std::collections::BTreeMap;
+use std::f64;
+use std::fmt::Debug;
+use std::i64;
+use std::marker::PhantomData;
+use std::u64;
 
 use serde::de;
 use serde::ser;
 
-use serde::json::{
+use serde_json::{
     self,
     Value,
     from_str,
@@ -12,7 +16,7 @@ use serde::json::{
     to_value,
 };
 
-use serde::json::error::{Error, ErrorCode};
+use serde_json::error::{Error, ErrorCode};
 
 macro_rules! treemap {
     ($($k:expr => $v:expr),*) => ({
@@ -27,7 +31,7 @@ enum Animal {
     Dog,
     Frog(String, Vec<isize>),
     Cat { age: usize, name: String },
-
+    AntHive(Vec<String>),
 }
 
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
@@ -48,11 +52,11 @@ fn test_encode_ok<T>(errors: &[(T, &str)])
     for &(ref value, out) in errors {
         let out = out.to_string();
 
-        let s = json::to_string(value).unwrap();
+        let s = serde_json::to_string(value).unwrap();
         assert_eq!(s, out);
 
         let v = to_value(&value);
-        let s = json::to_string(&v).unwrap();
+        let s = serde_json::to_string(&v).unwrap();
         assert_eq!(s, out);
     }
 }
@@ -63,11 +67,11 @@ fn test_pretty_encode_ok<T>(errors: &[(T, &str)])
     for &(ref value, out) in errors {
         let out = out.to_string();
 
-        let s = json::to_string_pretty(value).unwrap();
+        let s = serde_json::to_string_pretty(value).unwrap();
         assert_eq!(s, out);
 
         let v = to_value(&value);
-        let s = json::to_string_pretty(&v).unwrap();
+        let s = serde_json::to_string_pretty(&v).unwrap();
         assert_eq!(s, out);
     }
 }
@@ -81,12 +85,23 @@ fn test_write_null() {
     test_pretty_encode_ok(tests);
 }
 
+#[test]
+fn test_write_u64() {
+    let tests = &[
+        (3u64, "3"),
+        (u64::MAX, &u64::MAX.to_string()),
+    ];
+    test_encode_ok(tests);
+    test_pretty_encode_ok(tests);
+}
+
 #[test]
 fn test_write_i64() {
     let tests = &[
         (3i64, "3"),
         (-2i64, "-2"),
         (-1234i64, "-1234"),
+        (i64::MIN, &i64::MIN.to_string()),
     ];
     test_encode_ok(tests);
     test_pretty_encode_ok(tests);
@@ -94,11 +109,18 @@ fn test_write_i64() {
 
 #[test]
 fn test_write_f64() {
+    let min_string = format!("{:?}", f64::MIN);
+    let max_string = format!("{:?}", f64::MAX);
+    let epsilon_string = format!("{:?}", f64::EPSILON);
+
     let tests = &[
-        (3.0, "3.0"),
+        (3.0, "3"),
         (3.1, "3.1"),
         (-1.5, "-1.5"),
         (0.5, "0.5"),
+        (f64::MIN, &min_string),
+        (f64::MAX, &max_string),
+        (f64::EPSILON, &epsilon_string),
     ];
     test_encode_ok(tests);
     test_pretty_encode_ok(tests);
@@ -533,6 +555,10 @@ fn test_write_enum() {
             Animal::Cat { age: 5, name: "Kate".to_string() },
             "{\"Cat\":{\"age\":5,\"name\":\"Kate\"}}"
         ),
+        (
+            Animal::AntHive(vec!["Bob".to_string(), "Stuart".to_string()]),
+            "{\"AntHive\":[\"Bob\",\"Stuart\"]}",
+        ),
     ]);
 
     test_pretty_encode_ok(&[
@@ -616,7 +642,7 @@ fn test_write_option() {
     ]);
 }
 
-fn test_parse_ok<T>(errors: Vec<(&'static str, T)>)
+fn test_parse_ok<T>(errors: Vec<(&str, T)>)
     where T: Clone + Debug + PartialEq + ser::Serialize + de::Deserialize,
 {
     for (s, value) in errors {
@@ -702,7 +728,6 @@ fn test_parse_number_errors() {
         ("1e", Error::SyntaxError(ErrorCode::InvalidNumber, 1, 2)),
         ("1e+", Error::SyntaxError(ErrorCode::InvalidNumber, 1, 3)),
         ("1a", Error::SyntaxError(ErrorCode::TrailingCharacters, 1, 2)),
-        ("777777777777777777777777777", Error::SyntaxError(ErrorCode::InvalidNumber, 1, 20)),
         ("1e777777777777777777777777777", Error::SyntaxError(ErrorCode::InvalidNumber, 1, 22)),
     ]);
 }
@@ -713,28 +738,44 @@ fn test_parse_i64() {
         ("-2", -2),
         ("-1234", -1234),
         (" -1234 ", -1234),
+        (&i64::MIN.to_string(), i64::MIN),
+        (&i64::MAX.to_string(), i64::MAX),
     ]);
 }
 
 #[test]
 fn test_parse_u64() {
     test_parse_ok(vec![
+        ("0", 0u64),
         ("3", 3u64),
         ("1234", 1234),
+        (&u64::MAX.to_string(), u64::MAX),
     ]);
 }
 
 #[test]
 fn test_parse_f64() {
     test_parse_ok(vec![
+        ("0.0", 0.0f64),
         ("3.0", 3.0f64),
+        ("3.00", 3.0f64),
         ("3.1", 3.1),
         ("-1.2", -1.2),
         ("0.4", 0.4),
         ("0.4e5", 0.4e5),
+        ("0.4e+5", 0.4e5),
         ("0.4e15", 0.4e15),
-        ("0.4e-01", 0.4e-01),
-        (" 0.4e-01 ", 0.4e-01),
+        ("0.4e+15", 0.4e15),
+        ("0.4e-01", 0.4e-1),
+        (" 0.4e-01 ", 0.4e-1),
+        ("0.4e-001", 0.4e-1),
+        ("0.4e-0", 0.4e0),
+        ("0.00e00", 0.0),
+        ("0.00e+00", 0.0),
+        ("0.00e-00", 0.0),
+        (&format!("{:?}", (i64::MIN as f64) - 1.0), (i64::MIN as f64) - 1.0),
+        (&format!("{:?}", (u64::MAX as f64) + 1.0), (u64::MAX as f64) + 1.0),
+        (&format!("{:?}", f64::EPSILON), f64::EPSILON),
     ]);
 }
 
@@ -763,8 +804,8 @@ fn test_parse_string() {
 #[test]
 fn test_parse_list() {
     test_parse_err::<Vec<f64>>(vec![
-        ("[", Error::SyntaxError(ErrorCode::EOFWhileParsingValue, 1, 1)),
-        ("[ ", Error::SyntaxError(ErrorCode::EOFWhileParsingValue, 1, 2)),
+        ("[", Error::SyntaxError(ErrorCode::EOFWhileParsingList, 1, 1)),
+        ("[ ", Error::SyntaxError(ErrorCode::EOFWhileParsingList, 1, 2)),
         ("[1", Error::SyntaxError(ErrorCode::EOFWhileParsingList,  1, 2)),
         ("[1,", Error::SyntaxError(ErrorCode::EOFWhileParsingValue, 1, 3)),
         ("[1,]", Error::SyntaxError(ErrorCode::ExpectedSomeValue, 1, 4)),
@@ -815,8 +856,8 @@ fn test_parse_list() {
 #[test]
 fn test_parse_object() {
     test_parse_err::<BTreeMap<String, u32>>(vec![
-        ("{", Error::SyntaxError(ErrorCode::EOFWhileParsingValue, 1, 1)),
-        ("{ ", Error::SyntaxError(ErrorCode::EOFWhileParsingValue, 1, 2)),
+        ("{", Error::SyntaxError(ErrorCode::EOFWhileParsingObject, 1, 1)),
+        ("{ ", Error::SyntaxError(ErrorCode::EOFWhileParsingObject, 1, 2)),
         ("{1", Error::SyntaxError(ErrorCode::KeyMustBeAString, 1, 2)),
         ("{ \"a\"", Error::SyntaxError(ErrorCode::EOFWhileParsingObject, 1, 5)),
         ("{\"a\"", Error::SyntaxError(ErrorCode::EOFWhileParsingObject, 1, 4)),
@@ -868,7 +909,7 @@ fn test_parse_struct() {
     test_parse_err::<Outer>(vec![
         ("5", Error::SyntaxError(ErrorCode::ExpectedSomeValue, 1, 1)),
         ("\"hello\"", Error::SyntaxError(ErrorCode::ExpectedSomeValue, 1, 7)),
-        ("{\"inner\": true}", Error::SyntaxError(ErrorCode::ExpectedSomeValue, 1, 15)),
+        ("{\"inner\": true}", Error::SyntaxError(ErrorCode::ExpectedSomeValue, 1, 14)),
     ]);
 
     test_parse_ok(vec![
@@ -891,7 +932,7 @@ fn test_parse_struct() {
                     Inner { a: (), b: 2, c: vec!["abc".to_string(), "xyz".to_string()] }
                 ]
             },
-        )
+        ),
     ]);
 
     let v: Outer = from_str("{}").unwrap();
@@ -902,6 +943,22 @@ fn test_parse_struct() {
             inner: vec![],
         }
     );
+
+    let v: Outer = from_str(
+        "[
+            [
+                [ null, 2, [\"abc\", \"xyz\"] ]
+            ]
+        ]").unwrap();
+
+    assert_eq!(
+        v,
+        Outer {
+            inner: vec![
+                Inner { a: (), b: 2, c: vec!["abc".to_string(), "xyz".to_string()] }
+            ],
+        }
+    );
 }
 
 #[test]
@@ -931,10 +988,10 @@ fn test_parse_enum_errors() {
         ("{}", Error::SyntaxError(ErrorCode::ExpectedSomeValue, 1, 2)),
         ("{\"Dog\":", Error::SyntaxError(ErrorCode::EOFWhileParsingValue, 1, 7)),
         ("{\"Dog\":}", Error::SyntaxError(ErrorCode::ExpectedSomeValue, 1, 8)),
-        ("{\"unknown\":[]}", Error::SyntaxError(ErrorCode::UnknownField("unknown".to_string()), 1, 11)),
-        ("{\"Dog\":{}}", Error::SyntaxError(ErrorCode::ExpectedSomeValue, 1, 9)),
-        ("{\"Frog\":{}}", Error::SyntaxError(ErrorCode::ExpectedSomeValue, 1, 10)),
-        ("{\"Cat\":[]}", Error::SyntaxError(ErrorCode::ExpectedSomeValue, 1, 9)),
+        ("{\"unknown\":[]}", Error::SyntaxError(ErrorCode::UnknownField("unknown".to_string()), 1, 10)),
+        ("{\"Dog\":{}}", Error::SyntaxError(ErrorCode::ExpectedSomeValue, 1, 8)),
+        ("{\"Frog\":{}}", Error::SyntaxError(ErrorCode::ExpectedSomeValue, 1, 9)),
+        ("{\"Cat\":[]}", Error::SyntaxError(ErrorCode::EOFWhileParsingValue, 1, 9)),
     ]);
 }
 
@@ -959,6 +1016,10 @@ fn test_parse_enum() {
             " { \"Cat\" : { \"age\" : 5 , \"name\" : \"Kate\" } } ",
             Animal::Cat { age: 5, name: "Kate".to_string() },
         ),
+        (
+            " { \"AntHive\" : [\"Bob\", \"Stuart\"] } ",
+            Animal::AntHive(vec!["Bob".to_string(), "Stuart".to_string()]),
+        ),
     ]);
 
     test_parse_ok(vec![
@@ -1064,7 +1125,7 @@ fn test_missing_fmt_renamed_field() {
 
 #[test]
 fn test_find_path() {
-    let obj: Value = json::from_str(r#"{"x": {"a": 1}, "y": 2}"#).unwrap();
+    let obj: Value = serde_json::from_str(r#"{"x": {"a": 1}, "y": 2}"#).unwrap();
 
     assert!(obj.find_path(&["x", "a"]).unwrap() == &Value::U64(1));
     assert!(obj.find_path(&["y"]).unwrap() == &Value::U64(2));
@@ -1073,9 +1134,217 @@ fn test_find_path() {
 
 #[test]
 fn test_lookup() {
-    let obj: Value = json::from_str(r#"{"x": {"a": 1}, "y": 2}"#).unwrap();
+    let obj: Value = serde_json::from_str(r#"{"x": {"a": 1}, "y": 2}"#).unwrap();
 
     assert!(obj.lookup("x.a").unwrap() == &Value::U64(1));
     assert!(obj.lookup("y").unwrap() == &Value::U64(2));
     assert!(obj.lookup("z").is_none());
 }
+
+#[test]
+fn test_serialize_seq_with_no_len() {
+    #[derive(Clone, Debug, PartialEq)]
+    struct MyVec<T>(Vec<T>);
+
+    impl<T> ser::Serialize for MyVec<T>
+        where T: ser::Serialize,
+    {
+        #[inline]
+        fn serialize<S>(&self, serializer: &mut S) -> Result<(), S::Error>
+            where S: ser::Serializer,
+        {
+            serializer.visit_seq(ser::impls::SeqIteratorVisitor::new(self.0.iter(), None))
+        }
+    }
+
+    struct Visitor<T> {
+        marker: PhantomData<MyVec<T>>,
+    }
+
+    impl<T> de::Visitor for Visitor<T>
+        where T: de::Deserialize,
+    {
+        type Value = MyVec<T>;
+
+        #[inline]
+        fn visit_unit<E>(&mut self) -> Result<MyVec<T>, E>
+            where E: de::Error,
+        {
+            Ok(MyVec(Vec::new()))
+        }
+
+        #[inline]
+        fn visit_seq<V>(&mut self, mut visitor: V) -> Result<MyVec<T>, V::Error>
+            where V: de::SeqVisitor,
+        {
+            let mut values = Vec::new();
+
+            while let Some(value) = try!(visitor.visit()) {
+                values.push(value);
+            }
+
+            try!(visitor.end());
+
+            Ok(MyVec(values))
+        }
+    }
+
+    impl<T> de::Deserialize for MyVec<T>
+        where T: de::Deserialize,
+    {
+        fn deserialize<D>(deserializer: &mut D) -> Result<MyVec<T>, D::Error>
+            where D: de::Deserializer,
+        {
+            deserializer.visit_map(Visitor { marker: PhantomData })
+        }
+    }
+
+    let mut vec = Vec::new();
+    vec.push(MyVec(Vec::new()));
+    vec.push(MyVec(Vec::new()));
+    let vec: MyVec<MyVec<u32>> = MyVec(vec);
+
+    test_encode_ok(&[
+        (
+            vec.clone(),
+            "[[],[]]",
+        ),
+    ]);
+
+    let s = serde_json::to_string_pretty(&vec).unwrap();
+    assert_eq!(
+        s,
+        concat!(
+            "[\n",
+            "  [\n",
+            "  ],\n",
+            "  [\n",
+            "  ]\n",
+            "]"
+        )
+    );
+}
+
+#[test]
+fn test_serialize_map_with_no_len() {
+    #[derive(Clone, Debug, PartialEq)]
+    struct Map<K, V>(BTreeMap<K, V>);
+
+    impl<K, V> ser::Serialize for Map<K, V>
+        where K: ser::Serialize + Ord,
+              V: ser::Serialize,
+    {
+        #[inline]
+        fn serialize<S>(&self, serializer: &mut S) -> Result<(), S::Error>
+            where S: ser::Serializer,
+        {
+            serializer.visit_map(ser::impls::MapIteratorVisitor::new(self.0.iter(), None))
+        }
+    }
+
+    struct Visitor<K, V> {
+        marker: PhantomData<Map<K, V>>,
+    }
+
+    impl<K, V> de::Visitor for Visitor<K, V>
+        where K: de::Deserialize + Eq + Ord,
+              V: de::Deserialize,
+    {
+        type Value = Map<K, V>;
+
+        #[inline]
+        fn visit_unit<E>(&mut self) -> Result<Map<K, V>, E>
+            where E: de::Error,
+        {
+            Ok(Map(BTreeMap::new()))
+        }
+
+        #[inline]
+        fn visit_map<Visitor>(&mut self, mut visitor: Visitor) -> Result<Map<K, V>, Visitor::Error>
+            where Visitor: de::MapVisitor,
+        {
+            let mut values = BTreeMap::new();
+
+            while let Some((key, value)) = try!(visitor.visit()) {
+                values.insert(key, value);
+            }
+
+            try!(visitor.end());
+
+            Ok(Map(values))
+        }
+    }
+
+    impl<K, V> de::Deserialize for Map<K, V>
+        where K: de::Deserialize + Eq + Ord,
+              V: de::Deserialize,
+    {
+        fn deserialize<D>(deserializer: &mut D) -> Result<Map<K, V>, D::Error>
+            where D: de::Deserializer,
+        {
+            deserializer.visit_map(Visitor { marker: PhantomData })
+        }
+    }
+
+    let mut map = BTreeMap::new();
+    map.insert("a", Map(BTreeMap::new()));
+    map.insert("b", Map(BTreeMap::new()));
+    let map: Map<_, Map<u32, u32>> = Map(map);
+
+    test_encode_ok(&[
+        (
+            map.clone(),
+            "{\"a\":{},\"b\":{}}",
+        ),
+    ]);
+
+    let s = serde_json::to_string_pretty(&map).unwrap();
+    assert_eq!(
+        s,
+        concat!(
+            "{\n",
+            "  \"a\": {\n",
+            "  },\n",
+            "  \"b\": {\n",
+            "  }\n",
+            "}"
+        )
+    );
+}
+
+#[test]
+fn test_deserialize_from_stream() {
+    use std::net;
+    use std::io::Read;
+    use std::thread;
+    use serde::Deserialize;
+
+    #[derive(Debug, PartialEq, Serialize, Deserialize)]
+    struct Message {
+        message: String,
+    }
+
+    let l = net::TcpListener::bind("localhost:20000").unwrap();
+
+    thread::spawn(|| {
+        let l = l;
+        for stream in l.incoming() {
+            let mut stream = stream.unwrap();
+            let read_stream = stream.try_clone().unwrap();
+
+            let mut de = serde_json::Deserializer::new(read_stream.bytes());
+            let request = Message::deserialize(&mut de).unwrap();
+            let response = Message { message: request.message };
+            serde_json::to_writer(&mut stream, &response).unwrap();
+        }
+    });
+
+    let mut stream = net::TcpStream::connect("localhost:20000").unwrap();
+    let request = Message { message: "hi there".to_string() };
+    serde_json::to_writer(&mut stream, &request).unwrap();
+
+    let mut de = serde_json::Deserializer::new(stream.bytes());
+    let response = Message::deserialize(&mut de).unwrap();
+
+    assert_eq!(request, response);
+}

serde_tests/tests/test_json_builder.rs

@@ -1,7 +1,7 @@
 use std::collections::BTreeMap;
 
-use serde::json::value::Value;
-use serde::json::builder::{ArrayBuilder, ObjectBuilder};
+use serde_json::value::Value;
+use serde_json::builder::{ArrayBuilder, ObjectBuilder};
 
 #[test]
 fn test_array_builder() {

serde_tests/tests/test_macros.rs

@@ -1,5 +1,5 @@
 use std::collections::BTreeMap;
-use serde::json::{self, Value};
+use serde_json::{self, Value};
 
 macro_rules! btreemap {
     () => {
@@ -131,24 +131,43 @@ enum Lifetimes<'a> {
     NoLifetimeMap { a: i32 },
 }
 
+#[derive(Debug, PartialEq, Serialize, Deserialize)]
+pub struct GenericStruct<T> {
+    x: T,
+}
+
+#[derive(Debug, PartialEq, Serialize, Deserialize)]
+pub struct GenericNewtypeStruct<T>(T);
+
+#[derive(Debug, PartialEq, Serialize, Deserialize)]
+pub struct GenericTupleStruct<T, U>(T, U);
+
+#[derive(Debug, PartialEq, Serialize, Deserialize)]
+pub enum GenericEnum<T, U> {
+    Unit,
+    Newtype(T),
+    Seq(T, U),
+    Map { x: T, y: U },
+}
+
 #[test]
 fn test_named_unit() {
     let named_unit = NamedUnit;
 
     assert_eq!(
-        json::to_string(&named_unit).unwrap(),
+        serde_json::to_string(&named_unit).unwrap(),
         "null".to_string()
     );
 
     assert_eq!(
-        json::to_value(&named_unit),
+        serde_json::to_value(&named_unit),
         Value::Null
     );
 
-    let v: NamedUnit = json::from_str("null").unwrap();
+    let v: NamedUnit = serde_json::from_str("null").unwrap();
     assert_eq!(v, named_unit);
 
-    let v: NamedUnit = json::from_value(Value::Null).unwrap();
+    let v: NamedUnit = serde_json::from_value(Value::Null).unwrap();
     assert_eq!(v, named_unit);
 }
 
@@ -160,25 +179,25 @@ fn test_ser_named_tuple() {
     let named_tuple = SerNamedTuple(&a, &mut b, c);
 
     assert_eq!(
-        json::to_string(&named_tuple).unwrap(),
+        serde_json::to_string(&named_tuple).unwrap(),
         "[5,6,7]"
     );
 
     assert_eq!(
-        json::to_value(&named_tuple),
+        serde_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();
+    let v: DeNamedTuple<i32, i32, i32> = serde_json::from_str("[1,2,3]").unwrap();
     assert_eq!(
         v,
         DeNamedTuple(1, 2, 3)
     );
 
-    let v: Value = json::from_str("[1,2,3]").unwrap();
+    let v: Value = serde_json::from_str("[1,2,3]").unwrap();
     assert_eq!(
         v,
         Value::Array(vec![
@@ -201,12 +220,12 @@ fn test_ser_named_map() {
     };
 
     assert_eq!(
-        json::to_string(&named_map).unwrap(),
+        serde_json::to_string(&named_map).unwrap(),
         "{\"a\":5,\"b\":6,\"c\":7}"
     );
 
     assert_eq!(
-        json::to_value(&named_map),
+        serde_json::to_value(&named_map),
         Value::Object(btreemap![
             "a".to_string() => Value::U64(5),
             "b".to_string() => Value::U64(6),
@@ -223,12 +242,12 @@ fn test_de_named_map() {
         c: 7,
     };
 
-    let v2: DeNamedMap<i32, i32, i32> = json::from_str(
+    let v2: DeNamedMap<i32, i32, i32> = serde_json::from_str(
         "{\"a\":5,\"b\":6,\"c\":7}"
     ).unwrap();
     assert_eq!(v, v2);
 
-    let v2 = json::from_value(Value::Object(btreemap![
+    let v2 = serde_json::from_value(Value::Object(btreemap![
         "a".to_string() => Value::U64(5),
         "b".to_string() => Value::U64(6),
         "c".to_string() => Value::U64(7)
@@ -239,12 +258,12 @@ fn test_de_named_map() {
 #[test]
 fn test_ser_enum_unit() {
     assert_eq!(
-        json::to_string(&SerEnum::Unit::<u32, u32, u32>).unwrap(),
+        serde_json::to_string(&SerEnum::Unit::<u32, u32, u32>).unwrap(),
         "{\"Unit\":[]}"
     );
 
     assert_eq!(
-        json::to_value(&SerEnum::Unit::<u32, u32, u32>),
+        serde_json::to_value(&SerEnum::Unit::<u32, u32, u32>),
         Value::Object(btreemap!(
             "Unit".to_string() => Value::Array(vec![]))
         )
@@ -261,7 +280,7 @@ fn test_ser_enum_seq() {
     //let f = 6;
 
     assert_eq!(
-        json::to_string(&SerEnum::Seq(
+        serde_json::to_string(&SerEnum::Seq(
             a,
             b,
             &c,
@@ -273,7 +292,7 @@ fn test_ser_enum_seq() {
     );
 
     assert_eq!(
-        json::to_value(&SerEnum::Seq(
+        serde_json::to_value(&SerEnum::Seq(
             a,
             b,
             &c,
@@ -304,7 +323,7 @@ fn test_ser_enum_map() {
     //let f = 6;
 
     assert_eq!(
-        json::to_string(&SerEnum::Map {
+        serde_json::to_string(&SerEnum::Map {
             a: a,
             b: b,
             c: &c,
@@ -316,7 +335,7 @@ fn test_ser_enum_map() {
     );
 
     assert_eq!(
-        json::to_value(&SerEnum::Map {
+        serde_json::to_value(&SerEnum::Map {
             a: a,
             b: b,
             c: &c,
@@ -339,13 +358,13 @@ fn test_ser_enum_map() {
 
 #[test]
 fn test_de_enum_unit() {
-    let v: DeEnum<_, _, _> = json::from_str("{\"Unit\":[]}").unwrap();
+    let v: DeEnum<_, _, _> = serde_json::from_str("{\"Unit\":[]}").unwrap();
     assert_eq!(
         v,
         DeEnum::Unit::<u32, u32, u32>
     );
 
-    let v: DeEnum<_, _, _> = json::from_value(Value::Object(btreemap!(
+    let v: DeEnum<_, _, _> = serde_json::from_value(Value::Object(btreemap!(
         "Unit".to_string() => Value::Array(vec![]))
     )).unwrap();
     assert_eq!(
@@ -363,7 +382,7 @@ fn test_de_enum_seq() {
     let e = 5;
     //let f = 6;
 
-    let v: DeEnum<_, _, _> = json::from_str("{\"Seq\":[1,2,3,5]}").unwrap();
+    let v: DeEnum<_, _, _> = serde_json::from_str("{\"Seq\":[1,2,3,5]}").unwrap();
     assert_eq!(
         v,
         DeEnum::Seq(
@@ -376,7 +395,7 @@ fn test_de_enum_seq() {
         )
     );
 
-    let v: DeEnum<_, _, _> = json::from_value(Value::Object(btreemap!(
+    let v: DeEnum<_, _, _> = serde_json::from_value(Value::Object(btreemap!(
         "Seq".to_string() => Value::Array(vec![
             Value::U64(1),
             Value::U64(2),
@@ -408,7 +427,7 @@ fn test_de_enum_map() {
     let e = 5;
     //let f = 6;
 
-    let v: DeEnum<_, _, _> = json::from_str(
+    let v: DeEnum<_, _, _> = serde_json::from_str(
         "{\"Map\":{\"a\":1,\"b\":2,\"c\":3,\"e\":5}}"
     ).unwrap();
     assert_eq!(
@@ -423,7 +442,7 @@ fn test_de_enum_map() {
         }
     );
 
-    let v: DeEnum<_, _, _> = json::from_value(Value::Object(btreemap!(
+    let v: DeEnum<_, _, _> = serde_json::from_value(Value::Object(btreemap!(
         "Map".to_string() => Value::Object(btreemap![
             "a".to_string() => Value::U64(1),
             "b".to_string() => Value::U64(2),
@@ -452,26 +471,66 @@ fn test_lifetimes() {
     let value = 5;
     let lifetime = Lifetimes::LifetimeSeq(&value);
     assert_eq!(
-        json::to_string(&lifetime).unwrap(),
-        "{\"LifetimeSeq\":[5]}"
+        serde_json::to_string(&lifetime).unwrap(),
+        "{\"LifetimeSeq\":5}"
     );
 
     let lifetime = Lifetimes::NoLifetimeSeq(5);
     assert_eq!(
-        json::to_string(&lifetime).unwrap(),
-        "{\"NoLifetimeSeq\":[5]}"
+        serde_json::to_string(&lifetime).unwrap(),
+        "{\"NoLifetimeSeq\":5}"
     );
 
     let value = 5;
     let lifetime = Lifetimes::LifetimeMap { a: &value };
     assert_eq!(
-        json::to_string(&lifetime).unwrap(),
+        serde_json::to_string(&lifetime).unwrap(),
         "{\"LifetimeMap\":{\"a\":5}}"
     );
 
     let lifetime = Lifetimes::NoLifetimeMap { a: 5 };
     assert_eq!(
-        json::to_string(&lifetime).unwrap(),
+        serde_json::to_string(&lifetime).unwrap(),
         "{\"NoLifetimeMap\":{\"a\":5}}"
     );
 }
+
+macro_rules! declare_tests {
+    ($($name:ident { $($ty:ty : $value:expr => $str:expr,)+ })+) => {
+        $(
+            #[test]
+            fn $name() {
+                $(
+                    let value: $ty = $value;
+
+                    let string = serde_json::to_string(&value).unwrap();
+                    assert_eq!(string, $str);
+
+                    let expected: $ty = serde_json::from_str(&string).unwrap();
+                    assert_eq!(value, expected);
+                )+
+            }
+        )+
+    }
+}
+
+declare_tests! {
+    test_generic_struct {
+        GenericStruct<u32> : GenericStruct { x: 5 } => "{\"x\":5}",
+    }
+    test_generic_newtype_struct {
+        GenericNewtypeStruct<u32> : GenericNewtypeStruct(5) => "5",
+    }
+    test_generic_tuple_struct {
+        GenericTupleStruct<u32, u32> : GenericTupleStruct(5, 6) => "[5,6]",
+    }
+    test_generic_enum_newtype {
+        GenericEnum<u32, u32> : GenericEnum::Newtype(5) => "{\"Newtype\":5}",
+    }
+    test_generic_enum_seq {
+        GenericEnum<u32, u32> : GenericEnum::Seq(5, 6) => "{\"Seq\":[5,6]}",
+    }
+    test_generic_enum_map {
+        GenericEnum<u32, u32> : GenericEnum::Map { x: 5, y: 6 } => "{\"Map\":{\"x\":5,\"y\":6}}",
+    }
+}

serde_tests/tests/test_ser.rs

@@ -24,17 +24,19 @@ pub enum Token<'a> {
     Option(bool),
 
     Unit,
-    NamedUnit(&'a str),
+    UnitStruct(&'a str),
     EnumUnit(&'a str, &'a str),
 
+    EnumNewtype(&'a str, &'a str),
+
     SeqStart(Option<usize>),
-    NamedSeqStart(&'a str, Option<usize>),
+    TupleStructStart(&'a str, Option<usize>),
     EnumSeqStart(&'a str, &'a str, Option<usize>),
     SeqSep,
     SeqEnd,
 
     MapStart(Option<usize>),
-    NamedMapStart(&'a str, Option<usize>),
+    StructStart(&'a str, Option<usize>),
     EnumMapStart(&'a str, &'a str, Option<usize>),
     MapSep,
     MapEnd,
@@ -80,13 +82,31 @@ impl<'a> Serializer for AssertSerializer<'a> {
         Ok(())
     }
 
-    fn visit_named_unit(&mut self, name: &str) -> Result<(), ()> {
-        assert_eq!(self.iter.next().unwrap(), Token::NamedUnit(name));
+    fn visit_newtype_variant<T>(&mut self,
+                                name: &str,
+                                _variant_index: usize,
+                                variant: &str,
+                                value: T) -> Result<(), ()>
+        where T: Serialize,
+    {
+        assert_eq!(self.iter.next(), Some(Token::EnumNewtype(name, variant)));
+        value.serialize(self)
+    }
+
+    fn visit_unit_struct(&mut self, name: &str) -> Result<(), ()> {
+        assert_eq!(self.iter.next().unwrap(), Token::UnitStruct(name));
         Ok(())
     }
 
-    fn visit_enum_unit(&mut self, name: &str, variant: &str) -> Result<(), ()> {
-        assert_eq!(self.iter.next().unwrap(), Token::EnumUnit(name, variant));
+    fn visit_unit_variant(&mut self,
+                          name: &str,
+                          _variant_index: usize,
+                          variant: &str) -> Result<(), ()> {
+        assert_eq!(
+            self.iter.next().unwrap(),
+            Token::EnumUnit(name, variant)
+        );
+
         Ok(())
     }
 
@@ -188,25 +208,32 @@ impl<'a> Serializer for AssertSerializer<'a> {
         self.visit_sequence(visitor)
     }
 
-    fn visit_named_seq<V>(&mut self, name: &str, visitor: V) -> Result<(), ()>
+    fn visit_tuple_struct<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));
+        assert_eq!(
+            self.iter.next().unwrap(),
+            Token::TupleStructStart(name, len)
+        );
 
         self.visit_sequence(visitor)
     }
 
-    fn visit_enum_seq<V>(&mut self,
-                         name: &str,
-                         variant: &str,
-                         visitor: V) -> Result<(), ()>
+    fn visit_tuple_variant<V>(&mut self,
+                              name: &str,
+                              _variant_index: usize,
+                              variant: &str,
+                              visitor: V) -> Result<(), ()>
         where V: SeqVisitor
     {
         let len = visitor.len();
 
-        assert_eq!(self.iter.next().unwrap(), Token::EnumSeqStart(name, variant, len));
+        assert_eq!(
+            self.iter.next().unwrap(),
+            Token::EnumSeqStart(name, variant, len)
+        );
 
         self.visit_sequence(visitor)
     }
@@ -228,22 +255,32 @@ impl<'a> Serializer for AssertSerializer<'a> {
         self.visit_mapping(visitor)
     }
 
-    fn visit_named_map<V>(&mut self, name: &str, visitor: V) -> Result<(), ()>
+    fn visit_struct<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));
+        assert_eq!(
+            self.iter.next().unwrap(),
+            Token::StructStart(name, len)
+        );
 
         self.visit_mapping(visitor)
     }
 
-    fn visit_enum_map<V>(&mut self, name: &str, variant: &str, visitor: V) -> Result<(), ()>
+    fn visit_struct_variant<V>(&mut self,
+                               name: &str,
+                               _variant_index: usize,
+                               variant: &str,
+                               visitor: V) -> Result<(), ()>
         where V: MapVisitor
     {
         let len = visitor.len();
 
-        assert_eq!(self.iter.next().unwrap(), Token::EnumMapStart(name, variant, len));
+        assert_eq!(
+            self.iter.next().unwrap(),
+            Token::EnumMapStart(name, variant, len)
+        );
 
         self.visit_mapping(visitor)
     }
@@ -262,13 +299,13 @@ impl<'a> Serializer for AssertSerializer<'a> {
 //////////////////////////////////////////////////////////////////////////
 
 #[derive(Serialize)]
-struct NamedUnit;
+struct UnitStruct;
 
 #[derive(Serialize)]
-struct NamedSeq(i32, i32, i32);
+struct TupleStruct(i32, i32, i32);
 
 #[derive(Serialize)]
-struct NamedMap {
+struct Struct {
     a: i32,
     b: i32,
     c: i32,
@@ -277,6 +314,7 @@ struct NamedMap {
 #[derive(Serialize)]
 enum Enum {
     Unit,
+    One(i32),
     Seq(i32, i32),
     Map { a: i32, b: i32 },
 }
@@ -356,6 +394,16 @@ declare_tests! {
             Token::I32(1),
         ],
     }
+    test_result {
+        Ok::<i32, i32>(0) => vec![
+            Token::EnumNewtype("Result", "Ok"),
+            Token::I32(0),
+        ],
+        Err::<i32, i32>(1) => vec![
+            Token::EnumNewtype("Result", "Err"),
+            Token::I32(1),
+        ],
+    }
     test_slice {
         &[0][..0] => vec![
             Token::SeqStart(Some(0)),
@@ -480,12 +528,12 @@ declare_tests! {
             Token::MapEnd,
         ],
     }
-    test_named_unit {
-        NamedUnit => vec![Token::NamedUnit("NamedUnit")],
+    test_unit_struct {
+        UnitStruct => vec![Token::UnitStruct("UnitStruct")],
     }
-    test_named_seq {
-        NamedSeq(1, 2, 3) => vec![
-            Token::NamedSeqStart("NamedSeq", Some(3)),
+    test_tuple_struct {
+        TupleStruct(1, 2, 3) => vec![
+            Token::TupleStructStart("TupleStruct", Some(3)),
                 Token::SeqSep,
                 Token::I32(1),
 
@@ -497,9 +545,9 @@ declare_tests! {
             Token::SeqEnd,
         ],
     }
-    test_named_map {
-        NamedMap { a: 1, b: 2, c: 3 } => vec![
-            Token::NamedMapStart("NamedMap", Some(3)),
+    test_struct {
+        Struct { a: 1, b: 2, c: 3 } => vec![
+            Token::StructStart("Struct", Some(3)),
                 Token::MapSep,
                 Token::Str("a"),
                 Token::I32(1),
@@ -516,6 +564,7 @@ declare_tests! {
     }
     test_enum {
         Enum::Unit => vec![Token::EnumUnit("Enum", "Unit")],
+        Enum::One(42) => vec![Token::EnumNewtype("Enum", "One"), Token::I32(42)],
         Enum::Seq(1, 2) => vec![
             Token::EnumSeqStart("Enum", "Seq", Some(2)),
                 Token::SeqSep,