Release 0.8.18

Ask proc_macro_derive to ignore serde attributes

.travis.yml

@@ -1,17 +1,11 @@
 sudo: false
 language: rust
 rust:
+- 1.10.0
+- 1.11.0
 - stable
-- nightly
-- 1.8.0
-- 1.9.0
 - beta
-addons:
+- nightly
-  apt:
-    packages:
-    - libcurl4-openssl-dev
-    - libelf-dev
-    - libdw-dev
 before_script:
 - pip install 'travis-cargo<0.2' --user
 - export PATH=$HOME/.local/bin:$PATH
@@ -24,12 +18,10 @@ script:
 - (cd serde && travis-cargo --only nightly build -- --no-default-features --features collections)
 - (cd testing && travis-cargo --skip nightly test)
 - (cd testing && travis-cargo --only nightly test -- --features unstable-testing)
-- (cd serde_macros && travis-cargo --only nightly test -- --features unstable-testing)
+- (cd serde_derive && travis-cargo --only nightly test)
 - (cd examples/serde-syntex-example && travis-cargo --skip nightly run)
 - (cd examples/serde-syntex-example && travis-cargo --only nightly run -- --no-default-features --features unstable)
 - (cd serde && travis-cargo --only stable doc)
-after_success:
-- (cd testing && travis-cargo --only stable coveralls --no-sudo)
 env:
   global:
   - TRAVIS_CARGO_NIGHTLY_FEATURE=""

README.md

@@ -15,8 +15,10 @@ You may be looking for:
 ## Serde in action
 
 ```rust
-#![feature(plugin, custom_derive)]
+#![feature(proc_macro)]
-#![plugin(serde_macros)]
+
+#[macro_use]
+extern crate serde_derive;
 
 extern crate serde_json;
 

examples/serde-syntex-example/Cargo.toml

@@ -6,12 +6,12 @@ build = "build.rs"
 
 [features]
 default = ["serde_codegen"]
-unstable = ["serde_macros"]
+unstable = ["serde_derive"]
 
 [build-dependencies]
 serde_codegen = { version = "^0.8", optional = true, path = "../../serde_codegen" }
 
 [dependencies]
 serde = "^0.8"
+serde_derive = { version = "^0.8", optional = true, path = "../../serde_derive" }
 serde_json = "^0.8"
-serde_macros = { version = "^0.8", optional = true, path = "../../serde_macros" }

examples/serde-syntex-example/build.rs

@@ -1,4 +1,4 @@
-#[cfg(not(feature = "serde_macros"))]
+#[cfg(not(feature = "serde_derive"))]
 mod inner {
     extern crate serde_codegen;
 
@@ -15,7 +15,7 @@ mod inner {
     }
 }
 
-#[cfg(feature = "serde_macros")]
+#[cfg(feature = "serde_derive")]
 mod inner {
     pub fn main() {}
 }

examples/serde-syntex-example/src/main.rs

@@ -1,11 +1,14 @@
-#![cfg_attr(feature = "serde_macros", feature(custom_derive, plugin))]
+#![cfg_attr(feature = "serde_derive", feature(proc_macro))]
-#![cfg_attr(feature = "serde_macros", plugin(serde_macros))]
+
+#[cfg(feature = "serde_derive")]
+#[macro_use]
+extern crate serde_derive;
 
 extern crate serde;
 extern crate serde_json;
 
-#[cfg(feature = "serde_macros")]
+#[cfg(feature = "serde_derive")]
 include!("main.rs.in");
 
-#[cfg(not(feature = "serde_macros"))]
+#[cfg(not(feature = "serde_derive"))]
 include!(concat!(env!("OUT_DIR"), "/main.rs"));

serde/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "serde"
-version = "0.8.7"
+version = "0.8.18"
 authors = ["Erick Tryzelaar <erick.tryzelaar@gmail.com>"]
 license = "MIT/Apache-2.0"
 description = "A generic serialization/deserialization framework"

serde/src/de/impls.rs

@@ -512,27 +512,26 @@ seq_impl!(
 
 ///////////////////////////////////////////////////////////////////////////////
 
-struct ArrayVisitor0<T> {
+struct ArrayVisitor<A> {
-    marker: PhantomData<T>,
+    marker: PhantomData<A>,
 }
 
-impl<T> ArrayVisitor0<T> {
+impl<A> ArrayVisitor<A> {
-    /// Construct a `ArrayVisitor0<T>`.
     pub fn new() -> Self {
-        ArrayVisitor0 {
+        ArrayVisitor {
             marker: PhantomData,
         }
     }
 }
 
-impl<T> Visitor for ArrayVisitor0<T> where T: Deserialize + Default {
+impl<T> Visitor for ArrayVisitor<[T; 0]> where T: Deserialize {
     type Value = [T; 0];
 
     #[inline]
     fn visit_unit<E>(&mut self) -> Result<[T; 0], E>
         where E: Error,
     {
-        Ok([T::default(); 0])
+        Ok([])
     }
 
     #[inline]
@@ -540,37 +539,24 @@ impl<T> Visitor for ArrayVisitor0<T> where T: Deserialize + Default {
         where V: SeqVisitor,
     {
         try!(visitor.end());
-        Ok([T::default(); 0])
+        Ok([])
     }
 }
 
 impl<T> Deserialize for [T; 0]
-    where T: Deserialize + Default
+    where T: Deserialize
 {
     fn deserialize<D>(deserializer: &mut D) -> Result<[T; 0], D::Error>
         where D: Deserializer,
     {
-        deserializer.deserialize_seq(ArrayVisitor0::new())
+        deserializer.deserialize_seq_fixed_size(0, ArrayVisitor::<[T; 0]>::new())
     }
 }
 
 macro_rules! array_impls {
-    ($($visitor:ident, $len:expr => ($($name:ident),+),)+) => {
+    ($($len:expr => ($($name:ident)+))+) => {
         $(
-            struct $visitor<T> {
+            impl<T> Visitor for ArrayVisitor<[T; $len]> where T: Deserialize {
-                marker: PhantomData<T>,
-            }
-
-            impl<T> $visitor<T> {
-                /// Construct a `ArrayVisitor*<T>`.
-                pub fn new() -> Self {
-                    $visitor {
-                        marker: PhantomData
-                    }
-                }
-            }
-
-            impl<T> Visitor for $visitor<T> where T: Deserialize {
                 type Value = [T; $len];
 
                 #[inline]
@@ -580,13 +566,13 @@ macro_rules! array_impls {
                     $(
                         let $name = match try!(visitor.visit()) {
                             Some(val) => val,
-                            None => { return Err(Error::end_of_stream()); }
+                            None => return Err(Error::end_of_stream()),
                         };
-                    )+;
+                    )+
 
                     try!(visitor.end());
 
-                    Ok([$($name,)+])
+                    Ok([$($name),+])
                 }
             }
 
@@ -596,7 +582,7 @@ macro_rules! array_impls {
                 fn deserialize<D>(deserializer: &mut D) -> Result<[T; $len], D::Error>
                     where D: Deserializer,
                 {
-                    deserializer.deserialize_seq_fixed_size($len, $visitor::new())
+                    deserializer.deserialize_seq_fixed_size($len, ArrayVisitor::<[T; $len]>::new())
                 }
             }
         )+
@@ -604,71 +590,58 @@ macro_rules! array_impls {
 }
 
 array_impls! {
-    ArrayVisitor1, 1 => (a),
+    1 => (a)
-    ArrayVisitor2, 2 => (a, b),
+    2 => (a b)
-    ArrayVisitor3, 3 => (a, b, c),
+    3 => (a b c)
-    ArrayVisitor4, 4 => (a, b, c, d),
+    4 => (a b c d)
-    ArrayVisitor5, 5 => (a, b, c, d, e),
+    5 => (a b c d e)
-    ArrayVisitor6, 6 => (a, b, c, d, e, f),
+    6 => (a b c d e f)
-    ArrayVisitor7, 7 => (a, b, c, d, e, f, g),
+    7 => (a b c d e f g)
-    ArrayVisitor8, 8 => (a, b, c, d, e, f, g, h),
+    8 => (a b c d e f g h)
-    ArrayVisitor9, 9 => (a, b, c, d, e, f, g, h, i),
+    9 => (a b c d e f g h i)
-    ArrayVisitor10, 10 => (a, b, c, d, e, f, g, h, i, j),
+    10 => (a b c d e f g h i j)
-    ArrayVisitor11, 11 => (a, b, c, d, e, f, g, h, i, j, k),
+    11 => (a b c d e f g h i j k)
-    ArrayVisitor12, 12 => (a, b, c, d, e, f, g, h, i, j, k, l),
+    12 => (a b c d e f g h i j k l)
-    ArrayVisitor13, 13 => (a, b, c, d, e, f, g, h, i, j, k, l, m),
+    13 => (a b c d e f g h i j k l m)
-    ArrayVisitor14, 14 => (a, b, c, d, e, f, g, h, i, j, k, l, m, n),
+    14 => (a b c d e f g h i j k l m n)
-    ArrayVisitor15, 15 => (a, b, c, d, e, f, g, h, i, j, k, l, m, n, o),
+    15 => (a b c d e f g h i j k l m n o)
-    ArrayVisitor16, 16 => (a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p),
+    16 => (a b c d e f g h i j k l m n o p)
-    ArrayVisitor17, 17 => (a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q),
+    17 => (a b c d e f g h i j k l m n o p q)
-    ArrayVisitor18, 18 => (a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r),
+    18 => (a b c d e f g h i j k l m n o p q r)
-    ArrayVisitor19, 19 => (a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s),
+    19 => (a b c d e f g h i j k l m n o p q r s)
-    ArrayVisitor20, 20 => (a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s ,t),
+    20 => (a b c d e f g h i j k l m n o p q r s t)
-    ArrayVisitor21, 21 => (a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t, u),
+    21 => (a b c d e f g h i j k l m n o p q r s t u)
-    ArrayVisitor22, 22 => (a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t, u, v),
+    22 => (a b c d e f g h i j k l m n o p q r s t u v)
-    ArrayVisitor23, 23 => (a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t, u, v, w),
+    23 => (a b c d e f g h i j k l m n o p q r s t u v w)
-    ArrayVisitor24, 24 => (a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t, u, v, w, x),
+    24 => (a b c d e f g h i j k l m n o p q r s t u v w x)
-    ArrayVisitor25, 25 => (a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t, u, v, w, x,
+    25 => (a b c d e f g h i j k l m n o p q r s t u v w x y)
-                           y),
+    26 => (a b c d e f g h i j k l m n o p q r s t u v w x y z)
-    ArrayVisitor26, 26 => (a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t, u, v, w, x,
+    27 => (a b c d e f g h i j k l m n o p q r s t u v w x y z aa)
-                           y, z),
+    28 => (a b c d e f g h i j k l m n o p q r s t u v w x y z aa ab)
-    ArrayVisitor27, 27 => (a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t, u, v, w, x,
+    29 => (a b c d e f g h i j k l m n o p q r s t u v w x y z aa ab ac)
-                           y, z, aa),
+    30 => (a b c d e f g h i j k l m n o p q r s t u v w x y z aa ab ac ad)
-    ArrayVisitor28, 28 => (a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t, u, v, w, x,
+    31 => (a b c d e f g h i j k l m n o p q r s t u v w x y z aa ab ac ad ae)
-                           y, z, aa, ab),
+    32 => (a b c d e f g h i j k l m n o p q r s t u v w x y z aa ab ac ad ae af)
-    ArrayVisitor29, 29 => (a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t, u, v, w, x,
-                           y, z, aa, ab, ac),
-    ArrayVisitor30, 30 => (a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t, u, v, w, x,
-                           y, z, aa, ab, ac, ad),
-    ArrayVisitor31, 31 => (a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t, u, v, w, x,
-                           y, z, aa, ab, ac, ad, ae),
-    ArrayVisitor32, 32 => (a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t, u, v, w, x,
-                           y, z, aa, ab, ac, ad, ae, af),
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
 macro_rules! tuple_impls {
-    ($($len:expr => $visitor:ident => ($($name:ident),+),)+) => {
+    ($($len:expr => $visitor:ident => ($($name:ident)+))+) => {
         $(
             /// Construct a tuple visitor.
             pub struct $visitor<$($name,)+> {
                 marker: PhantomData<($($name,)+)>,
             }
 
-            impl<
+            impl<$($name: Deserialize,)+> $visitor<$($name,)+> {
-                $($name: Deserialize,)+
-            > $visitor<$($name,)+> {
                 /// Construct a `TupleVisitor*<T>`.
                 pub fn new() -> Self {
                     $visitor { marker: PhantomData }
                 }
             }
 
-
+            impl<$($name: Deserialize),+> Visitor for $visitor<$($name,)+> {
-            impl<
-                $($name: Deserialize,)+
-            > Visitor for $visitor<$($name,)+> {
                 type Value = ($($name,)+);
 
                 #[inline]
@@ -679,9 +652,9 @@ macro_rules! tuple_impls {
                     $(
                         let $name = match try!(visitor.visit()) {
                             Some(value) => value,
-                            None => { return Err(Error::end_of_stream()); }
+                            None => return Err(Error::end_of_stream()),
                         };
-                     )+;
+                    )+
 
                     try!(visitor.end());
 
@@ -689,9 +662,7 @@ macro_rules! tuple_impls {
                 }
             }
 
-            impl<
+            impl<$($name: Deserialize),+> Deserialize for ($($name,)+) {
-                $($name: Deserialize),+
-            > Deserialize for ($($name,)+) {
                 #[inline]
                 fn deserialize<D>(deserializer: &mut D) -> Result<($($name,)+), D::Error>
                     where D: Deserializer,
@@ -704,22 +675,22 @@ macro_rules! tuple_impls {
 }
 
 tuple_impls! {
-    1 => TupleVisitor1 => (T0),
+    1 => TupleVisitor1 => (T0)
-    2 => TupleVisitor2 => (T0, T1),
+    2 => TupleVisitor2 => (T0 T1)
-    3 => TupleVisitor3 => (T0, T1, T2),
+    3 => TupleVisitor3 => (T0 T1 T2)
-    4 => TupleVisitor4 => (T0, T1, T2, T3),
+    4 => TupleVisitor4 => (T0 T1 T2 T3)
-    5 => TupleVisitor5 => (T0, T1, T2, T3, T4),
+    5 => TupleVisitor5 => (T0 T1 T2 T3 T4)
-    6 => TupleVisitor6 => (T0, T1, T2, T3, T4, T5),
+    6 => TupleVisitor6 => (T0 T1 T2 T3 T4 T5)
-    7 => TupleVisitor7 => (T0, T1, T2, T3, T4, T5, T6),
+    7 => TupleVisitor7 => (T0 T1 T2 T3 T4 T5 T6)
-    8 => TupleVisitor8 => (T0, T1, T2, T3, T4, T5, T6, T7),
+    8 => TupleVisitor8 => (T0 T1 T2 T3 T4 T5 T6 T7)
-    9 => TupleVisitor9 => (T0, T1, T2, T3, T4, T5, T6, T7, T8),
+    9 => TupleVisitor9 => (T0 T1 T2 T3 T4 T5 T6 T7 T8)
-    10 => TupleVisitor10 => (T0, T1, T2, T3, T4, T5, T6, T7, T8, T9),
+    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),
+    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),
+    12 => TupleVisitor12 => (T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11)
-    13 => TupleVisitor13 => (T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12),
+    13 => TupleVisitor13 => (T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12)
-    14 => TupleVisitor14 => (T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13),
+    14 => TupleVisitor14 => (T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T13)
-    15 => TupleVisitor15 => (T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14),
+    15 => TupleVisitor15 => (T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14)
-    16 => TupleVisitor16 => (T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15),
+    16 => TupleVisitor16 => (T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 T15)
 }
 
 ///////////////////////////////////////////////////////////////////////////////
@@ -809,7 +780,7 @@ map_impl!(
 
 ///////////////////////////////////////////////////////////////////////////////
 
-#[cfg(all(feature = "unstable", feature = "std"))]
+#[cfg(feature = "std")]
 impl Deserialize for net::IpAddr {
     fn deserialize<D>(deserializer: &mut D) -> Result<Self, D::Error>
         where D: Deserializer,

serde/src/ser/impls.rs

@@ -313,11 +313,6 @@ impl Serialize for () {
 
 ///////////////////////////////////////////////////////////////////////////////
 
-// FIXME(rust #19630) Remove this work-around
-macro_rules! e {
-    ($e:expr) => { $e }
-}
-
 macro_rules! tuple_impls {
     ($(
         $TupleVisitor:ident ($len:expr, $($T:ident),+) {
@@ -334,7 +329,7 @@ macro_rules! tuple_impls {
                 {
                     let mut state = try!(serializer.serialize_tuple($len));
                     $(
-                        try!(serializer.serialize_tuple_elt(&mut state, &e!(self.$idx)));
+                        try!(serializer.serialize_tuple_elt(&mut state, &self.$idx));
                     )+
                     serializer.serialize_tuple_end(state)
                 }
@@ -640,15 +635,12 @@ impl Serialize for Duration {
 
 ///////////////////////////////////////////////////////////////////////////////
 
-#[cfg(all(feature = "std", feature = "unstable"))]
+#[cfg(feature = "std")]
 impl Serialize for net::IpAddr {
     fn serialize<S>(&self, serializer: &mut S) -> Result<(), S::Error>
         where S: Serializer,
     {
-        match *self {
+        self.to_string().serialize(serializer)
-            net::IpAddr::V4(ref addr) => addr.serialize(serializer),
-            net::IpAddr::V6(ref addr) => addr.serialize(serializer),
-        }
     }
 }
 

serde_codegen/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "serde_codegen"
-version = "0.8.7"
+version = "0.8.18"
 authors = ["Erick Tryzelaar <erick.tryzelaar@gmail.com>"]
 license = "MIT/Apache-2.0"
 description = "Macros to auto-generate implementations for the serde framework"
@@ -8,31 +8,22 @@ homepage = "https://serde.rs"
 repository = "https://github.com/serde-rs/serde"
 documentation = "https://serde.rs/codegen.html"
 keywords = ["serde", "serialization"]
-build = "build.rs"
+include = ["Cargo.toml", "src/**/*.rs"]
-include = ["Cargo.toml", "build.rs", "src/**/*.rs", "src/lib.rs.in"]
 
 [features]
 default = ["with-syntex"]
-unstable = ["quasi_macros"]
+unstable = []
 unstable-testing = ["clippy"]
 with-syntex = [
-    "quasi/with-syntex",
-    "quasi_codegen",
-    "quasi_codegen/with-syntex",
-    "serde_codegen_internals/with-syntex",
     "syntex",
     "syntex_syntax",
 ]
-
+with-syn = []
-[build-dependencies]
-quasi_codegen = { version = "^0.19.0", optional = true }
-syntex = { version = "^0.43.0", optional = true }
 
 [dependencies]
-aster = { version = "^0.26.0", default-features = false }
 clippy = { version = "^0.*", optional = true }
-quasi = { version = "^0.19.0", default-features = false }
+quote = "0.3"
-quasi_macros = { version = "^0.19.0", optional = true }
+serde_codegen_internals = { version = "=0.11.0", default-features = false, path = "../serde_codegen_internals" }
-serde_codegen_internals = { version = "=0.8.0", default-features = false, path = "../serde_codegen_internals" }
+syn = { version = "0.10", features = ["aster", "visit"] }
-syntex = { version = "^0.43.0", optional = true }
+syntex = { version = "^0.50.0", optional = true }
-syntex_syntax = { version = "^0.43.0", optional = true }
+syntex_syntax = { version = "^0.50.0", optional = true }

serde_codegen/build.rs

@@ -1,28 +0,0 @@
-#[cfg(feature = "with-syntex")]
-mod inner {
-    extern crate quasi_codegen;
-
-    use std::env;
-    use std::path::Path;
-    use std::thread::spawn;
-
-    pub fn main() {
-        // put everything into a thread, so users can use `RUST_MIN_STACK` to increase the amount of stack
-        spawn(|| {
-            let out_dir = env::var_os("OUT_DIR").unwrap();
-
-            let src = Path::new("src/lib.rs.in");
-            let dst = Path::new(&out_dir).join("lib.rs");
-            quasi_codegen::expand(&src, &dst).unwrap();
-        }).join().unwrap()
-    }
-}
-
-#[cfg(not(feature = "with-syntex"))]
-mod inner {
-    pub fn main() {}
-}
-
-fn main() {
-    inner::main();
-}

serde_codegen/src/bound.rs

@@ -1,9 +1,6 @@
 use std::collections::HashSet;
 
-use aster::AstBuilder;
+use syn::{self, aster, visit};
-
-use syntax::ast;
-use syntax::visit;
 
 use internals::ast::Item;
 use internals::attr;
@@ -11,10 +8,10 @@ use internals::attr;
 // Remove the default from every type parameter because in the generated impls
 // they look like associated types: "error: associated type bindings are not
 // allowed here".
-pub fn without_defaults(generics: &ast::Generics) -> ast::Generics {
+pub fn without_defaults(generics: &syn::Generics) -> syn::Generics {
-    ast::Generics {
+    syn::Generics {
         ty_params: generics.ty_params.iter().map(|ty_param| {
-            ast::TyParam {
+            syn::TyParam {
                 default: None,
                 .. ty_param.clone()
             }}).collect(),
@@ -23,24 +20,22 @@ pub fn without_defaults(generics: &ast::Generics) -> ast::Generics {
 }
 
 pub fn with_where_predicates(
-    builder: &AstBuilder,
+    generics: &syn::Generics,
-    generics: &ast::Generics,
+    predicates: &[syn::WherePredicate],
-    predicates: &[ast::WherePredicate],
+) -> syn::Generics {
-) -> ast::Generics {
+    aster::from_generics(generics.clone())
-    builder.from_generics(generics.clone())
         .with_predicates(predicates.to_vec())
         .build()
 }
 
 pub fn with_where_predicates_from_fields<F>(
-    builder: &AstBuilder,
     item: &Item,
-    generics: &ast::Generics,
+    generics: &syn::Generics,
     from_field: F,
-) -> ast::Generics
+) -> syn::Generics
-    where F: Fn(&attr::Field) -> Option<&[ast::WherePredicate]>,
+    where F: Fn(&attr::Field) -> Option<&[syn::WherePredicate]>,
 {
-    builder.from_generics(generics.clone())
+    aster::from_generics(generics.clone())
         .with_predicates(
             item.body.all_fields()
                 .flat_map(|field| from_field(&field.attrs))
@@ -60,34 +55,33 @@ pub fn with_where_predicates_from_fields<F>(
 //         c: C,
 //     }
 pub fn with_bound<F>(
-    builder: &AstBuilder,
     item: &Item,
-    generics: &ast::Generics,
+    generics: &syn::Generics,
     filter: F,
-    bound: &ast::Path,
+    bound: &syn::Path,
-) -> ast::Generics
+) -> syn::Generics
     where F: Fn(&attr::Field) -> bool,
 {
     struct FindTyParams {
         // Set of all generic type parameters on the current struct (A, B, C in
         // the example). Initialized up front.
-        all_ty_params: HashSet<ast::Name>,
+        all_ty_params: HashSet<syn::Ident>,
         // Set of generic type parameters used in fields for which filter
         // returns true (A and B in the example). Filled in as the visitor sees
         // them.
-        relevant_ty_params: HashSet<ast::Name>,
+        relevant_ty_params: HashSet<syn::Ident>,
     }
     impl visit::Visitor for FindTyParams {
-        fn visit_path(&mut self, path: &ast::Path, _id: ast::NodeId) {
+        fn visit_path(&mut self, path: &syn::Path) {
             if let Some(seg) = path.segments.last() {
-                if seg.identifier.name.as_str() == "PhantomData" {
+                if seg.ident == "PhantomData" {
                     // Hardcoded exception, because PhantomData<T> implements
                     // Serialize and Deserialize whether or not T implements it.
                     return;
                 }
             }
             if !path.global && path.segments.len() == 1 {
-                let id = path.segments[0].identifier.name;
+                let id = path.segments[0].ident.clone();
                 if self.all_ty_params.contains(&id) {
                     self.relevant_ty_params.insert(id);
                 }
@@ -97,7 +91,7 @@ pub fn with_bound<F>(
     }
 
     let all_ty_params: HashSet<_> = generics.ty_params.iter()
-        .map(|ty_param| ty_param.ident.name)
+        .map(|ty_param| ty_param.ident.clone())
         .collect();
 
     let relevant_tys = item.body.all_fields()
@@ -112,14 +106,14 @@ pub fn with_bound<F>(
         visit::walk_ty(&mut visitor, ty);
     }
 
-    builder.from_generics(generics.clone())
+    aster::from_generics(generics.clone())
         .with_predicates(
             generics.ty_params.iter()
-                .map(|ty_param| ty_param.ident.name)
+                .map(|ty_param| ty_param.ident.clone())
                 .filter(|id| visitor.relevant_ty_params.contains(id))
-                .map(|id| builder.where_predicate()
+                .map(|id| aster::where_predicate()
                     // the type parameter that is being bounded e.g. T
-                    .bound().build(builder.ty().id(id))
+                    .bound().build(aster::ty().id(id))
                     // the bound e.g. Serialize
                     .bound().trait_(bound.clone()).build()
                     .build()))

serde_codegen/src/lib.rs

@@ -3,10 +3,10 @@
 #![cfg_attr(feature = "clippy", allow(too_many_arguments))]
 #![cfg_attr(feature = "clippy", allow(used_underscore_binding))]
 #![cfg_attr(not(feature = "with-syntex"), feature(rustc_private, plugin))]
-#![cfg_attr(not(feature = "with-syntex"), plugin(quasi_macros))]
 
-extern crate aster;
+// The `quote!` macro requires deep recursion.
-extern crate quasi;
+#![recursion_limit = "192"]
+
 extern crate serde_codegen_internals as internals;
 
 #[cfg(feature = "with-syntex")]
@@ -23,17 +23,19 @@ extern crate syntax;
 #[cfg(not(feature = "with-syntex"))]
 extern crate rustc_plugin;
 
+extern crate syn;
+#[macro_use]
+extern crate quote;
+
 #[cfg(feature = "with-syntex")]
 use std::path::Path;
 
 #[cfg(not(feature = "with-syntex"))]
 use syntax::feature_gate::AttributeType;
 
-#[cfg(feature = "with-syntex")]
+mod bound;
-include!(concat!(env!("OUT_DIR"), "/lib.rs"));
+mod de;
-
+mod ser;
-#[cfg(not(feature = "with-syntex"))]
-include!("lib.rs.in");
 
 #[cfg(feature = "with-syntex")]
 fn syntex_registry() -> syntex::Registry {
@@ -68,8 +70,8 @@ fn syntex_registry() -> syntex::Registry {
     reg.add_attr("feature(custom_derive)");
     reg.add_attr("feature(custom_attribute)");
 
-    reg.add_decorator("derive_Serialize", ser::expand_derive_serialize);
+    reg.add_decorator("derive_Serialize", shim::expand_derive_serialize);
-    reg.add_decorator("derive_Deserialize", de::expand_derive_deserialize);
+    reg.add_decorator("derive_Deserialize", shim::expand_derive_deserialize);
 
     reg.add_post_expansion_pass(strip_attributes);
 
@@ -107,12 +109,90 @@ pub fn register(reg: &mut rustc_plugin::Registry) {
     reg.register_syntax_extension(
         syntax::parse::token::intern("derive_Serialize"),
         syntax::ext::base::MultiDecorator(
-            Box::new(ser::expand_derive_serialize)));
+            Box::new(shim::expand_derive_serialize)));
 
     reg.register_syntax_extension(
         syntax::parse::token::intern("derive_Deserialize"),
         syntax::ext::base::MultiDecorator(
-            Box::new(de::expand_derive_deserialize)));
+            Box::new(shim::expand_derive_deserialize)));
 
     reg.register_attribute("serde".to_owned(), AttributeType::Normal);
 }
+
+macro_rules! shim {
+    ($name:ident $pkg:ident :: $func:ident) => {
+        pub fn $func(
+            cx: &mut ::syntax::ext::base::ExtCtxt,
+            span: ::syntax::codemap::Span,
+            meta_item: &::syntax::ast::MetaItem,
+            annotatable: &::syntax::ext::base::Annotatable,
+            push: &mut FnMut(::syntax::ext::base::Annotatable)
+        ) {
+            let item = match *annotatable {
+                ::syntax::ext::base::Annotatable::Item(ref item) => item,
+                _ => {
+                    cx.span_err(
+                        meta_item.span,
+                        concat!("`#[derive(",
+                                stringify!($name),
+                                ")]` may only be applied to structs and enums"));
+                    return;
+                }
+            };
+
+            use syntax::{attr, ast, visit};
+            struct MarkSerdeAttributesUsed;
+            impl visit::Visitor for MarkSerdeAttributesUsed {
+                fn visit_attribute(&mut self, attr: &ast::Attribute) {
+                    match attr.node.value.node {
+                        ast::MetaItemKind::List(ref name, _) if name == "serde" => {
+                            attr::mark_used(attr);
+                        }
+                        _ => {}
+                    }
+                }
+            }
+            visit::walk_item(&mut MarkSerdeAttributesUsed, item);
+
+            use syntax::print::pprust;
+            let s = pprust::item_to_string(item);
+
+            use {syn, $pkg};
+            let syn_item = syn::parse_macro_input(&s).unwrap();
+            let expanded = match $pkg::$func(&syn_item) {
+                Ok(expanded) => expanded.to_string(),
+                Err(msg) => {
+                    cx.span_err(span, &msg);
+                    return;
+                }
+            };
+
+            use syntax::parse;
+            let name = stringify!($name).to_string();
+            let sess = cx.parse_sess;
+            let impl_item = parse::parse_item_from_source_str(name, expanded, sess);
+            push(::syntax::ext::base::Annotatable::Item(impl_item.unwrap().unwrap()));
+        }
+    };
+}
+
+mod shim {
+    shim!(Serialize ser::expand_derive_serialize);
+    shim!(Deserialize de::expand_derive_deserialize);
+}
+
+#[cfg(feature = "with-syn")]
+#[doc(hidden)]
+/// Not public API. Use the serde_derive crate.
+pub fn expand_derive_serialize(item: &str) -> Result<String, String> {
+    let syn_item = syn::parse_macro_input(item).unwrap();
+    ser::expand_derive_serialize(&syn_item).map(|derive| derive.to_string())
+}
+
+#[cfg(feature = "with-syn")]
+#[doc(hidden)]
+/// Not public API. Use the serde_derive crate.
+pub fn expand_derive_deserialize(item: &str) -> Result<String, String> {
+    let syn_item = syn::parse_macro_input(item).unwrap();
+    de::expand_derive_deserialize(&syn_item).map(|derive| derive.to_string())
+}

serde_codegen/src/lib.rs.in

@@ -1,4 +0,0 @@
-mod bound;
-mod de;
-mod ser;
-mod span;

serde_codegen/src/ser.rs

@@ -1,103 +1,62 @@
-use aster;
+use syn::{self, aster};
-
+use quote::Tokens;
-use syntax::ast::{self, Ident, MetaItem};
-use syntax::codemap::Span;
-use syntax::ext::base::{Annotatable, ExtCtxt};
-use syntax::ptr::P;
-use syntax::tokenstream::TokenTree;
 
 use bound;
-use span;
 use internals::ast::{Body, Field, Item, Style, Variant};
-use internals::{attr, Error};
+use internals::{self, attr};
 
-pub fn expand_derive_serialize(
+pub fn expand_derive_serialize(item: &syn::MacroInput) -> Result<Tokens, String> {
-    cx: &mut ExtCtxt,
+    let ctxt = internals::Ctxt::new();
-    span: Span,
+    let item = Item::from_ast(&ctxt, item);
-    meta_item: &MetaItem,
+    try!(ctxt.check());
-    annotatable: &Annotatable,
-    push: &mut FnMut(Annotatable)
-) {
-    let item = match *annotatable {
-        Annotatable::Item(ref item) => item,
-        _ => {
-            cx.span_err(
-                meta_item.span,
-                "`#[derive(Serialize)]` may only be applied to structs and enums");
-            return;
-        }
-    };
 
-    let item = match Item::from_ast(cx, item) {
+    let impl_generics = build_impl_generics(&item);
-        Ok(item) => item,
-        Err(Error::UnexpectedItemKind) => {
-            cx.span_err(item.span,
-                "`#[derive(Serialize)]` may only be applied to structs and enums");
-            return;
-        }
-    };
 
-    let builder = aster::AstBuilder::new().span(span);
+    let ty = aster::ty().path()
-
+        .segment(item.ident.clone()).with_generics(impl_generics.clone()).build()
-    let impl_item = serialize_item(cx, &builder, &item);
-    push(span::record_expansion(cx, impl_item, "Serialize"))
-}
-
-fn serialize_item(
-    cx: &ExtCtxt,
-    builder: &aster::AstBuilder,
-    item: &Item,
-) -> P<ast::Item> {
-    let impl_generics = build_impl_generics(builder, &item);
-
-    let ty = builder.ty().path()
-        .segment(item.ident).with_generics(impl_generics.clone()).build()
         .build();
 
-    let body = serialize_body(cx,
+    let body = serialize_body(&item,
-                              builder,
-                              &item,
                               &impl_generics,
                               ty.clone());
 
     let where_clause = &impl_generics.where_clause;
 
-    let dummy_const = builder.id(format!("_IMPL_SERIALIZE_FOR_{}", item.ident));
+    let dummy_const = aster::id(format!("_IMPL_SERIALIZE_FOR_{}", item.ident));
 
-    quote_item!(cx,
+    Ok(quote! {
         #[allow(non_upper_case_globals, unused_attributes, unused_qualifications)]
-        const $dummy_const: () = {
+        const #dummy_const: () = {
             extern crate serde as _serde;
             #[automatically_derived]
-            impl $impl_generics _serde::ser::Serialize for $ty $where_clause {
+            impl #impl_generics _serde::ser::Serialize for #ty #where_clause {
                 fn serialize<__S>(&self, _serializer: &mut __S) -> ::std::result::Result<(), __S::Error>
                     where __S: _serde::ser::Serializer
-                $body
+                {
+                    #body
+                }
             }
         };
-    ).unwrap()
+    })
 }
 
 // All the generics in the input, plus a bound `T: Serialize` for each generic
 // field type that will be serialized by us.
-fn build_impl_generics(
+fn build_impl_generics(item: &Item) -> syn::Generics {
-    builder: &aster::AstBuilder,
-    item: &Item,
-) -> ast::Generics {
     let generics = bound::without_defaults(item.generics);
 
     let generics = bound::with_where_predicates_from_fields(
-        builder, item, &generics,
+        item, &generics,
         |attrs| attrs.ser_bound());
 
     match item.attrs.ser_bound() {
         Some(predicates) => {
-            bound::with_where_predicates(builder, &generics, predicates)
+            bound::with_where_predicates(&generics, predicates)
         }
         None => {
-            bound::with_bound(builder, item, &generics,
+            bound::with_bound(item, &generics,
                 needs_serialize_bound,
-                &builder.path().ids(&["_serde", "ser", "Serialize"]).build())
+                &aster::path().ids(&["_serde", "ser", "Serialize"]).build())
         }
     }
 }
@@ -113,18 +72,14 @@ fn needs_serialize_bound(attrs: &attr::Field) -> bool {
 }
 
 fn serialize_body(
-    cx: &ExtCtxt,
-    builder: &aster::AstBuilder,
     item: &Item,
-    impl_generics: &ast::Generics,
+    impl_generics: &syn::Generics,
-    ty: P<ast::Ty>,
+    ty: syn::Ty,
-) -> P<ast::Block> {
+) -> Tokens {
     match item.body {
         Body::Enum(ref variants) => {
             serialize_item_enum(
-                cx,
+                &item.ident,
-                builder,
-                item.ident,
                 impl_generics,
                 ty,
                 variants,
@@ -132,12 +87,10 @@ fn serialize_body(
         }
         Body::Struct(Style::Struct, ref fields) => {
             if fields.iter().any(|field| field.ident.is_none()) {
-                cx.span_bug(item.span, "struct has unnamed fields")
+                panic!("struct has unnamed fields");
             }
 
             serialize_struct(
-                cx,
-                builder,
                 impl_generics,
                 ty,
                 fields,
@@ -145,12 +98,10 @@ fn serialize_body(
         }
         Body::Struct(Style::Tuple, ref fields) => {
             if fields.iter().any(|field| field.ident.is_some()) {
-                cx.span_bug(item.span, "tuple struct has named fields")
+                panic!("tuple struct has named fields");
             }
 
             serialize_tuple_struct(
-                cx,
-                builder,
                 impl_generics,
                 ty,
                 fields,
@@ -158,8 +109,6 @@ fn serialize_body(
         }
         Body::Struct(Style::Newtype, ref fields) => {
             serialize_newtype_struct(
-                cx,
-                builder,
                 impl_generics,
                 ty,
                 &fields[0],
@@ -167,136 +116,116 @@ fn serialize_body(
         }
         Body::Struct(Style::Unit, _) => {
             serialize_unit_struct(
-                cx,
-                builder,
                 &item.attrs)
         }
     }
 }
 
-fn serialize_unit_struct(
+fn serialize_unit_struct(item_attrs: &attr::Item) -> Tokens {
-    cx: &ExtCtxt,
+    let type_name = item_attrs.name().serialize_name();
-    builder: &aster::AstBuilder,
-    item_attrs: &attr::Item,
-) -> P<ast::Block> {
-    let type_name = name_expr(builder, item_attrs.name());
 
-    quote_block!(cx, {
+    quote! {
-        _serializer.serialize_unit_struct($type_name)
+        _serializer.serialize_unit_struct(#type_name)
-    }).unwrap()
+    }
 }
 
 fn serialize_newtype_struct(
-    cx: &ExtCtxt,
+    impl_generics: &syn::Generics,
-    builder: &aster::AstBuilder,
+    item_ty: syn::Ty,
-    impl_generics: &ast::Generics,
-    item_ty: P<ast::Ty>,
     field: &Field,
     item_attrs: &attr::Item,
-) -> P<ast::Block> {
+) -> Tokens {
-    let type_name = name_expr(builder, item_attrs.name());
+    let type_name = item_attrs.name().serialize_name();
 
-    let mut field_expr = quote_expr!(cx, &self.0);
+    let mut field_expr = quote!(&self.0);
     if let Some(path) = field.attrs.serialize_with() {
-        field_expr = wrap_serialize_with(cx, builder,
+        field_expr = wrap_serialize_with(
-            &item_ty, impl_generics, &field.ty, path, field_expr);
+            &item_ty, impl_generics, field.ty, path, field_expr);
     }
 
-    quote_block!(cx, {
+    quote! {
-        _serializer.serialize_newtype_struct($type_name, $field_expr)
+        _serializer.serialize_newtype_struct(#type_name, #field_expr)
-    }).unwrap()
+    }
 }
 
 fn serialize_tuple_struct(
-    cx: &ExtCtxt,
+    impl_generics: &syn::Generics,
-    builder: &aster::AstBuilder,
+    ty: syn::Ty,
-    impl_generics: &ast::Generics,
-    ty: P<ast::Ty>,
     fields: &[Field],
     item_attrs: &attr::Item,
-) -> P<ast::Block> {
+) -> Tokens {
     let serialize_stmts = serialize_tuple_struct_visitor(
-        cx,
-        builder,
         ty.clone(),
         fields,
         impl_generics,
         false,
-        cx.ident_of("serialize_tuple_struct_elt"),
+        aster::id("serialize_tuple_struct_elt"),
     );
 
-    let type_name = name_expr(builder, item_attrs.name());
+    let type_name = item_attrs.name().serialize_name();
     let len = serialize_stmts.len();
-    let let_mut = mut_if(cx, len > 0);
+    let let_mut = mut_if(len > 0);
 
-    quote_block!(cx, {
+    quote! {
-        let $let_mut state = try!(_serializer.serialize_tuple_struct($type_name, $len));
+        let #let_mut __serde_state = try!(_serializer.serialize_tuple_struct(#type_name, #len));
-        $serialize_stmts
+        #(#serialize_stmts)*
-        _serializer.serialize_tuple_struct_end(state)
+        _serializer.serialize_tuple_struct_end(__serde_state)
-    }).unwrap()
+    }
 }
 
 fn serialize_struct(
-    cx: &ExtCtxt,
+    impl_generics: &syn::Generics,
-    builder: &aster::AstBuilder,
+    ty: syn::Ty,
-    impl_generics: &ast::Generics,
-    ty: P<ast::Ty>,
     fields: &[Field],
     item_attrs: &attr::Item,
-) -> P<ast::Block> {
+) -> Tokens {
     let serialize_fields = serialize_struct_visitor(
-        cx,
-        builder,
         ty.clone(),
         fields,
         impl_generics,
         false,
-        cx.ident_of("serialize_struct_elt"),
+        aster::id("serialize_struct_elt"),
     );
 
-    let type_name = name_expr(builder, item_attrs.name());
+    let type_name = item_attrs.name().serialize_name();
 
     let mut serialized_fields = fields.iter()
         .filter(|&field| !field.attrs.skip_serializing())
         .peekable();
 
-    let let_mut = mut_if(cx, serialized_fields.peek().is_some());
+    let let_mut = mut_if(serialized_fields.peek().is_some());
 
     let len = serialized_fields
         .map(|field| {
-            let ident = field.ident.expect("struct has unnamed fields");
+            let ident = field.ident.clone().expect("struct has unnamed fields");
-            let field_expr = quote_expr!(cx, &self.$ident);
+            let field_expr = quote!(&self.#ident);
 
             match field.attrs.skip_serializing_if() {
-                Some(path) => quote_expr!(cx, if $path($field_expr) { 0 } else { 1 }),
+                Some(path) => quote!(if #path(#field_expr) { 0 } else { 1 }),
-                None => quote_expr!(cx, 1),
+                None => quote!(1),
             }
          })
-        .fold(quote_expr!(cx, 0), |sum, expr| quote_expr!(cx, $sum + $expr));
+        .fold(quote!(0), |sum, expr| quote!(#sum + #expr));
 
-    quote_block!(cx, {
+    quote! {
-        let $let_mut state = try!(_serializer.serialize_struct($type_name, $len));
+        let #let_mut __serde_state = try!(_serializer.serialize_struct(#type_name, #len));
-        $serialize_fields
+        #(#serialize_fields)*
-        _serializer.serialize_struct_end(state)
+        _serializer.serialize_struct_end(__serde_state)
-    }).unwrap()
+    }
 }
 
 fn serialize_item_enum(
-    cx: &ExtCtxt,
+    type_ident: &syn::Ident,
-    builder: &aster::AstBuilder,
+    impl_generics: &syn::Generics,
-    type_ident: Ident,
+    ty: syn::Ty,
-    impl_generics: &ast::Generics,
-    ty: P<ast::Ty>,
     variants: &[Variant],
     item_attrs: &attr::Item,
-) -> P<ast::Block> {
+) -> Tokens {
     let arms: Vec<_> =
         variants.iter()
             .enumerate()
             .map(|(variant_index, variant)| {
                 serialize_variant(
-                    cx,
-                    builder,
                     type_ident,
                     impl_generics,
                     ty.clone(),
@@ -307,44 +236,40 @@ fn serialize_item_enum(
             })
             .collect();
 
-    quote_block!(cx, {
+    quote! {
         match *self {
-            $arms
+            #(#arms)*
         }
-    }).unwrap()
+    }
 }
 
 fn serialize_variant(
-    cx: &ExtCtxt,
+    type_ident: &syn::Ident,
-    builder: &aster::AstBuilder,
+    generics: &syn::Generics,
-    type_ident: Ident,
+    ty: syn::Ty,
-    generics: &ast::Generics,
-    ty: P<ast::Ty>,
     variant: &Variant,
     variant_index: usize,
     item_attrs: &attr::Item,
-) -> ast::Arm {
+) -> Tokens {
-    let type_name = name_expr(builder, item_attrs.name());
+    let type_name = item_attrs.name().serialize_name();
 
-    let variant_ident = variant.ident;
+    let variant_ident = variant.ident.clone();
-    let variant_name = name_expr(builder, variant.attrs.name());
+    let variant_name = variant.attrs.name().serialize_name();
 
     match variant.style {
         Style::Unit => {
-            quote_arm!(cx,
+            quote! {
-                $type_ident::$variant_ident =>
+                #type_ident::#variant_ident =>
                     _serde::ser::Serializer::serialize_unit_variant(
                         _serializer,
-                        $type_name,
+                        #type_name,
-                        $variant_index,
+                        #variant_index,
-                        $variant_name,
+                        #variant_name,
                     ),
-            )
+            }
         },
         Style::Newtype => {
             let block = serialize_newtype_variant(
-                cx,
-                builder,
                 type_name,
                 variant_index,
                 variant_name,
@@ -353,26 +278,21 @@ fn serialize_variant(
                 &variant.fields[0],
             );
 
-            quote_arm!(cx,
+            quote! {
-                $type_ident::$variant_ident(ref __simple_value) => $block
+                #type_ident::#variant_ident(ref __simple_value) => #block,
-            )
+            }
         },
         Style::Tuple => {
-            let field_names: Vec<ast::Ident> = (0 .. variant.fields.len())
+            let field_names: Vec<Tokens> = (0 .. variant.fields.len())
-                .map(|i| builder.id(format!("__field{}", i)))
+                .map(|i| {
+                    let id = aster::id(format!("__field{}", i));
+                    quote!(ref #id)
+                })
                 .collect();
 
-            let pat = builder.pat().enum_()
+            let pat = quote!(#type_ident::#variant_ident(#(#field_names),*));
-                .id(type_ident).id(variant_ident).build()
-                .with_pats(
-                    field_names.iter()
-                        .map(|field| builder.pat().ref_id(field))
-                )
-                .build();
 
             let block = serialize_tuple_variant(
-                cx,
-                builder,
                 type_name,
                 variant_index,
                 variant_name,
@@ -381,28 +301,21 @@ fn serialize_variant(
                 &variant.fields,
             );
 
-            quote_arm!(cx,
+            quote! {
-                $pat => $block
+                #pat => { #block }
-            )
+            }
         }
         Style::Struct => {
-            let mut pat = builder.pat().struct_().id(type_ident).id(variant_ident).build();
+            let fields = variant.fields.iter().map(|field| {
-            for field in &variant.fields {
+                let id = match field.ident {
-                let name = match field.ident {
+                    Some(ref name) => name.clone(),
-                    Some(name) => name,
+                    None => panic!("struct variant has unnamed fields"),
-                    None => cx.span_bug(field.span, "struct variant has unnamed fields"),
                 };
-                pat = pat.with_field_pat(ast::FieldPat {
+                quote!(ref #id)
-                    ident: name,
+            });
-                    pat: builder.pat().ref_id(name),
+            let pat = quote!(#type_ident::#variant_ident { #(#fields),* });
-                    is_shorthand: true,
-                });
-            }
-            let pat = pat.build();
 
             let block = serialize_struct_variant(
-                cx,
-                builder,
                 variant_index,
                 variant_name,
                 generics,
@@ -411,262 +324,243 @@ fn serialize_variant(
                 item_attrs,
             );
 
-            quote_arm!(cx,
+            quote! {
-                $pat => $block
+                #pat => { #block }
-            )
+            }
         }
     }
 }
 
 fn serialize_newtype_variant(
-    cx: &ExtCtxt,
+    type_name: String,
-    builder: &aster::AstBuilder,
-    type_name: P<ast::Expr>,
     variant_index: usize,
-    variant_name: P<ast::Expr>,
+    variant_name: String,
-    item_ty: P<ast::Ty>,
+    item_ty: syn::Ty,
-    generics: &ast::Generics,
+    generics: &syn::Generics,
     field: &Field,
-) -> P<ast::Block> {
+) -> Tokens {
-    let mut field_expr = quote_expr!(cx, __simple_value);
+    let mut field_expr = quote!(__simple_value);
     if let Some(path) = field.attrs.serialize_with() {
-        field_expr = wrap_serialize_with(cx, builder,
+        field_expr = wrap_serialize_with(
-            &item_ty, generics, &field.ty, path, field_expr);
+            &item_ty, generics, field.ty, path, field_expr);
     }
 
-    quote_block!(cx, {
+    quote! {
         _serde::ser::Serializer::serialize_newtype_variant(
             _serializer,
-            $type_name,
+            #type_name,
-            $variant_index,
+            #variant_index,
-            $variant_name,
+            #variant_name,
-            $field_expr,
+            #field_expr,
         )
-    }).unwrap()
+    }
 }
 
 fn serialize_tuple_variant(
-    cx: &ExtCtxt,
+    type_name: String,
-    builder: &aster::AstBuilder,
-    type_name: P<ast::Expr>,
     variant_index: usize,
-    variant_name: P<ast::Expr>,
+    variant_name: String,
-    generics: &ast::Generics,
+    generics: &syn::Generics,
-    structure_ty: P<ast::Ty>,
+    structure_ty: syn::Ty,
     fields: &[Field],
-) -> P<ast::Block> {
+) -> Tokens {
     let serialize_stmts = serialize_tuple_struct_visitor(
-        cx,
-        builder,
         structure_ty,
         fields,
         generics,
         true,
-        cx.ident_of("serialize_tuple_variant_elt"),
+        aster::id("serialize_tuple_variant_elt"),
     );
 
     let len = serialize_stmts.len();
-    let let_mut = mut_if(cx, len > 0);
+    let let_mut = mut_if(len > 0);
 
-    quote_block!(cx, {
+    quote! {
-        let $let_mut state = try!(_serializer.serialize_tuple_variant($type_name, $variant_index, $variant_name, $len));
+        let #let_mut __serde_state = try!(_serializer.serialize_tuple_variant(
-        $serialize_stmts
+            #type_name,
-        _serializer.serialize_tuple_variant_end(state)
+            #variant_index,
-    }).unwrap()
+            #variant_name,
+            #len));
+        #(#serialize_stmts)*
+        _serializer.serialize_tuple_variant_end(__serde_state)
+    }
 }
 
 fn serialize_struct_variant(
-    cx: &ExtCtxt,
-    builder: &aster::AstBuilder,
     variant_index: usize,
-    variant_name: P<ast::Expr>,
+    variant_name: String,
-    generics: &ast::Generics,
+    generics: &syn::Generics,
-    ty: P<ast::Ty>,
+    ty: syn::Ty,
     fields: &[Field],
     item_attrs: &attr::Item,
-) -> P<ast::Block> {
+) -> Tokens {
-
     let serialize_fields = serialize_struct_visitor(
-        cx,
-        builder,
         ty.clone(),
         fields,
-        &generics,
+        generics,
         true,
-        cx.ident_of("serialize_struct_variant_elt"),
+        aster::id("serialize_struct_variant_elt"),
     );
 
-    let item_name = name_expr(builder, item_attrs.name());
+    let item_name = item_attrs.name().serialize_name();
 
     let mut serialized_fields = fields.iter()
         .filter(|&field| !field.attrs.skip_serializing())
         .peekable();
 
-    let let_mut = mut_if(cx, serialized_fields.peek().is_some());
+    let let_mut = mut_if(serialized_fields.peek().is_some());
 
     let len = serialized_fields
         .map(|field| {
-            let ident = field.ident.expect("struct has unnamed fields");
+            let ident = field.ident.clone().expect("struct has unnamed fields");
-            let field_expr = quote_expr!(cx, $ident);
 
             match field.attrs.skip_serializing_if() {
-                Some(path) => quote_expr!(cx, if $path($field_expr) { 0 } else { 1 }),
+                Some(path) => quote!(if #path(#ident) { 0 } else { 1 }),
-                None => quote_expr!(cx, 1),
+                None => quote!(1),
             }
          })
-        .fold(quote_expr!(cx, 0), |sum, expr| quote_expr!(cx, $sum + $expr));
+        .fold(quote!(0), |sum, expr| quote!(#sum + #expr));
 
-    quote_block!(cx, {
+    quote! {
-        let $let_mut state = try!(_serializer.serialize_struct_variant(
+        let #let_mut __serde_state = try!(_serializer.serialize_struct_variant(
-            $item_name,
+            #item_name,
-            $variant_index,
+            #variant_index,
-            $variant_name,
+            #variant_name,
-            $len,
+            #len,
         ));
-        $serialize_fields
+        #(#serialize_fields)*
-        _serializer.serialize_struct_variant_end(state)
+        _serializer.serialize_struct_variant_end(__serde_state)
-    }).unwrap()
+    }
 }
 
 fn serialize_tuple_struct_visitor(
-    cx: &ExtCtxt,
+    structure_ty: syn::Ty,
-    builder: &aster::AstBuilder,
-    structure_ty: P<ast::Ty>,
     fields: &[Field],
-    generics: &ast::Generics,
+    generics: &syn::Generics,
     is_enum: bool,
-    func: ast::Ident,
+    func: syn::Ident,
-) -> Vec<ast::Stmt> {
+) -> Vec<Tokens> {
     fields.iter()
         .enumerate()
         .map(|(i, field)| {
             let mut field_expr = if is_enum {
-                builder.expr().path().id(format!("__field{}", i)).build()
+                let id = aster::id(format!("__field{}", i));
+                quote!(#id)
             } else {
-                builder.expr().ref_().tup_field(i).self_()
+                let i = aster::id(i);
+                quote!(&self.#i)
             };
 
             let skip = field.attrs.skip_serializing_if()
-                .map(|path| quote_expr!(cx, $path($field_expr)));
+                .map(|path| quote!(#path(#field_expr)));
 
             if let Some(path) = field.attrs.serialize_with() {
-                field_expr = wrap_serialize_with(cx, builder,
+                field_expr = wrap_serialize_with(
-                    &structure_ty, generics, &field.ty, path, field_expr);
+                    &structure_ty, generics, field.ty, path, field_expr);
             }
 
-            let ser = quote_expr!(cx,
+            let ser = quote! {
-                try!(_serializer.$func(&mut state, $field_expr));
+                try!(_serializer.#func(&mut __serde_state, #field_expr));
-            );
+            };
 
             match skip {
-                None => quote_stmt!(cx, $ser).unwrap(),
+                None => ser,
-                Some(skip) => quote_stmt!(cx, if !$skip { $ser }).unwrap(),
+                Some(skip) => quote!(if !#skip { #ser }),
             }
         })
         .collect()
 }
 
 fn serialize_struct_visitor(
-    cx: &ExtCtxt,
+    structure_ty: syn::Ty,
-    builder: &aster::AstBuilder,
-    structure_ty: P<ast::Ty>,
     fields: &[Field],
-    generics: &ast::Generics,
+    generics: &syn::Generics,
     is_enum: bool,
-    func: ast::Ident,
+    func: syn::Ident,
-) -> Vec<ast::Stmt> {
+) -> Vec<Tokens> {
     fields.iter()
         .filter(|&field| !field.attrs.skip_serializing())
         .map(|field| {
-            let ident = field.ident.expect("struct has unnamed field");
+            let ident = field.ident.clone().expect("struct has unnamed field");
             let mut field_expr = if is_enum {
-                quote_expr!(cx, $ident)
+                quote!(#ident)
             } else {
-                quote_expr!(cx, &self.$ident)
+                quote!(&self.#ident)
             };
 
-            let key_expr = name_expr(builder, field.attrs.name());
+            let key_expr = field.attrs.name().serialize_name();
 
             let skip = field.attrs.skip_serializing_if()
-                .map(|path| quote_expr!(cx, $path($field_expr)));
+                .map(|path| quote!(#path(#field_expr)));
 
             if let Some(path) = field.attrs.serialize_with() {
-                field_expr = wrap_serialize_with(cx, builder,
+                field_expr = wrap_serialize_with(
-                    &structure_ty, generics, &field.ty, path, field_expr)
+                    &structure_ty, generics, field.ty, path, field_expr)
             }
 
-            let ser = quote_expr!(cx,
+            let ser = quote! {
-                try!(_serializer.$func(&mut state, $key_expr, $field_expr));
+                try!(_serializer.#func(&mut __serde_state, #key_expr, #field_expr));
-            );
+            };
 
             match skip {
-                None => quote_stmt!(cx, $ser).unwrap(),
+                None => ser,
-                Some(skip) => quote_stmt!(cx, if !$skip { $ser }).unwrap(),
+                Some(skip) => quote!(if !#skip { #ser }),
             }
         })
         .collect()
 }
 
 fn wrap_serialize_with(
-    cx: &ExtCtxt,
+    item_ty: &syn::Ty,
-    builder: &aster::AstBuilder,
+    generics: &syn::Generics,
-    item_ty: &P<ast::Ty>,
+    field_ty: &syn::Ty,
-    generics: &ast::Generics,
+    path: &syn::Path,
-    field_ty: &P<ast::Ty>,
+    value: Tokens,
-    path: &ast::Path,
+) -> Tokens {
-    value: P<ast::Expr>,
-) -> P<ast::Expr> {
     let where_clause = &generics.where_clause;
 
-    let wrapper_generics = builder.from_generics(generics.clone())
+    let wrapper_generics = aster::from_generics(generics.clone())
         .add_lifetime_bound("'__a")
         .lifetime_name("'__a")
         .build();
 
-    let wrapper_ty = builder.path()
+    let wrapper_ty = aster::path()
         .segment("__SerializeWith")
             .with_generics(wrapper_generics.clone())
             .build()
         .build();
 
-    quote_expr!(cx, {
+    quote!({
-        struct __SerializeWith $wrapper_generics $where_clause {
+        struct __SerializeWith #wrapper_generics #where_clause {
-            value: &'__a $field_ty,
+            value: &'__a #field_ty,
-            phantom: ::std::marker::PhantomData<$item_ty>,
+            phantom: ::std::marker::PhantomData<#item_ty>,
         }
 
-        impl $wrapper_generics _serde::ser::Serialize for $wrapper_ty $where_clause {
+        impl #wrapper_generics _serde::ser::Serialize for #wrapper_ty #where_clause {
-            fn serialize<__S>(&self, __s: &mut __S) -> Result<(), __S::Error>
+            fn serialize<__S>(&self, __s: &mut __S) -> ::std::result::Result<(), __S::Error>
                 where __S: _serde::ser::Serializer
             {
-                $path(self.value, __s)
+                #path(self.value, __s)
             }
         }
 
         __SerializeWith {
-            value: $value,
+            value: #value,
-            phantom: ::std::marker::PhantomData::<$item_ty>,
+            phantom: ::std::marker::PhantomData::<#item_ty>,
         }
     })
 }
 
-fn name_expr(
-    builder: &aster::AstBuilder,
-    name: &attr::Name,
-) -> P<ast::Expr> {
-    builder.expr().str(name.serialize_name())
-}
-
 // Serialization of an empty struct results in code like:
 //
-//     let mut state = try!(serializer.serialize_struct("S", 0));
+//     let mut __serde_state = try!(serializer.serialize_struct("S", 0));
-//     serializer.serialize_struct_end(state)
+//     serializer.serialize_struct_end(__serde_state)
 //
 // where we want to omit the `mut` to avoid a warning.
-fn mut_if(cx: &ExtCtxt, is_mut: bool) -> Vec<TokenTree> {
+fn mut_if(is_mut: bool) -> Option<Tokens> {
     if is_mut {
-        quote_tokens!(cx, mut)
+        Some(quote!(mut))
     } else {
-        Vec::new()
+        None
     }
 }

serde_codegen/src/span.rs

@@ -1,43 +0,0 @@
-use syntax::ast;
-use syntax::codemap::{self, ExpnId, Span};
-use syntax::ext::base::{Annotatable, ExtCtxt};
-use syntax::fold::{self, Folder};
-use syntax::parse::token::intern;
-use syntax::ptr::P;
-
-pub fn record_expansion(
-    cx: &ExtCtxt,
-    item: P<ast::Item>,
-    derive: &str,
-) -> Annotatable {
-    let info = codemap::ExpnInfo {
-        call_site: codemap::DUMMY_SP,
-        callee: codemap::NameAndSpan {
-            format: codemap::MacroAttribute(intern(&format!("derive({})", derive))),
-            span: None,
-            allow_internal_unstable: false,
-        },
-    };
-    let expn_id = cx.codemap().record_expansion(info);
-
-    let mut respanner = Respanner { expn_id: expn_id };
-    let item = item.map(|item| respanner.fold_item_simple(item));
-    Annotatable::Item(item)
-}
-
-struct Respanner {
-    expn_id: ExpnId,
-}
-
-impl Folder for Respanner {
-    fn new_span(&mut self, span: Span) -> Span {
-        Span {
-            expn_id: self.expn_id,
-            .. span
-        }
-    }
-
-    fn fold_mac(&mut self, mac: ast::Mac) -> ast::Mac {
-        fold::noop_fold_mac(mac, self)
-    }
-}

serde_codegen_internals/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "serde_codegen_internals"
-version = "0.8.0"
+version = "0.11.0"
 authors = ["Erick Tryzelaar <erick.tryzelaar@gmail.com>"]
 license = "MIT/Apache-2.0"
 description = "AST representation used by Serde codegen. Unstable."
@@ -11,11 +11,8 @@ keywords = ["serde", "serialization"]
 include = ["Cargo.toml", "src/**/*.rs"]
 
 [features]
-default = ["with-syntex"]
 unstable-testing = ["clippy"]
-with-syntex = ["syntex_syntax", "syntex_errors"]
 
 [dependencies]
 clippy = { version = "^0.*", optional = true }
-syntex_syntax = { version = "^0.43.0", optional = true }
+syn = "0.10"
-syntex_errors = { version = "^0.43.0", optional = true }

serde_codegen_internals/src/ast.rs

@@ -1,17 +1,12 @@
-use syntax::ast;
+use syn;
-use syntax::codemap;
-use syntax::ext::base::ExtCtxt;
-use syntax::ptr::P;
-
 use attr;
-use Error;
+use Ctxt;
 
 pub struct Item<'a> {
-    pub ident: ast::Ident,
+    pub ident: syn::Ident,
-    pub span: codemap::Span,
     pub attrs: attr::Item,
     pub body: Body<'a>,
-    pub generics: &'a ast::Generics,
+    pub generics: &'a syn::Generics,
 }
 
 pub enum Body<'a> {
@@ -20,18 +15,16 @@ pub enum Body<'a> {
 }
 
 pub struct Variant<'a> {
-    pub ident: ast::Ident,
+    pub ident: syn::Ident,
-    pub span: codemap::Span,
     pub attrs: attr::Variant,
     pub style: Style,
     pub fields: Vec<Field<'a>>,
 }
 
 pub struct Field<'a> {
-    pub ident: Option<ast::Ident>,
+    pub ident: Option<syn::Ident>,
-    pub span: codemap::Span,
     pub attrs: attr::Field,
-    pub ty: &'a P<ast::Ty>,
+    pub ty: &'a syn::Ty,
 }
 
 pub enum Style {
@@ -42,33 +35,25 @@ pub enum Style {
 }
 
 impl<'a> Item<'a> {
-    pub fn from_ast(
+    pub fn from_ast(cx: &Ctxt, item: &'a syn::MacroInput) -> Item<'a> {
-        cx: &ExtCtxt,
-        item: &'a ast::Item,
-    ) -> Result<Item<'a>, Error> {
         let attrs = attr::Item::from_ast(cx, item);
 
-        let (body, generics) = match item.node {
+        let body = match item.body {
-            ast::ItemKind::Enum(ref enum_def, ref generics) => {
+            syn::Body::Enum(ref variants) => {
-                let variants = enum_from_ast(cx, enum_def);
+                Body::Enum(enum_from_ast(cx, variants))
-                (Body::Enum(variants), generics)
             }
-            ast::ItemKind::Struct(ref variant_data, ref generics) => {
+            syn::Body::Struct(ref variant_data) => {
                 let (style, fields) = struct_from_ast(cx, variant_data);
-                (Body::Struct(style, fields), generics)
+                Body::Struct(style, fields)
-            }
-            _ => {
-                return Err(Error::UnexpectedItemKind);
             }
         };
 
-        Ok(Item {
+        Item {
-            ident: item.ident,
+            ident: item.ident.clone(),
-            span: item.span,
             attrs: attrs,
             body: body,
-            generics: generics,
+            generics: &item.generics,
-        })
+        }
     }
 }
 
@@ -86,16 +71,12 @@ impl<'a> Body<'a> {
     }
 }
 
-fn enum_from_ast<'a>(
+fn enum_from_ast<'a>(cx: &Ctxt, variants: &'a [syn::Variant]) -> Vec<Variant<'a>> {
-    cx: &ExtCtxt,
+    variants.iter()
-    enum_def: &'a ast::EnumDef,
-) -> Vec<Variant<'a>> {
-    enum_def.variants.iter()
         .map(|variant| {
-            let (style, fields) = struct_from_ast(cx, &variant.node.data);
+            let (style, fields) = struct_from_ast(cx, &variant.data);
             Variant {
-                ident: variant.node.name,
+                ident: variant.ident.clone(),
-                span: variant.span,
                 attrs: attr::Variant::from_ast(cx, variant),
                 style: style,
                 fields: fields,
@@ -104,36 +85,29 @@ fn enum_from_ast<'a>(
         .collect()
 }
 
-fn struct_from_ast<'a>(
+fn struct_from_ast<'a>(cx: &Ctxt, data: &'a syn::VariantData) -> (Style, Vec<Field<'a>>) {
-    cx: &ExtCtxt,
+    match *data {
-    variant_data: &'a ast::VariantData,
+        syn::VariantData::Struct(ref fields) => {
-) -> (Style, Vec<Field<'a>>) {
-    match *variant_data {
-        ast::VariantData::Struct(ref fields, _) => {
             (Style::Struct, fields_from_ast(cx, fields))
         }
-        ast::VariantData::Tuple(ref fields, _) if fields.len() == 1 => {
+        syn::VariantData::Tuple(ref fields) if fields.len() == 1 => {
             (Style::Newtype, fields_from_ast(cx, fields))
         }
-        ast::VariantData::Tuple(ref fields, _) => {
+        syn::VariantData::Tuple(ref fields) => {
             (Style::Tuple, fields_from_ast(cx, fields))
         }
-        ast::VariantData::Unit(_) => {
+        syn::VariantData::Unit => {
             (Style::Unit, Vec::new())
         }
     }
 }
 
-fn fields_from_ast<'a>(
+fn fields_from_ast<'a>(cx: &Ctxt, fields: &'a [syn::Field]) -> Vec<Field<'a>> {
-    cx: &ExtCtxt,
-    fields: &'a [ast::StructField],
-) -> Vec<Field<'a>> {
     fields.iter()
         .enumerate()
         .map(|(i, field)| {
             Field {
-                ident: field.ident,
+                ident: field.ident.clone(),
-                span: field.span,
                 attrs: attr::Field::from_ast(cx, i, field),
                 ty: &field.ty,
             }

serde_codegen_internals/src/attr.rs

@@ -1,15 +1,7 @@
-use std::rc::Rc;
+use Ctxt;
-
+use syn;
-use syntax::ast;
+use syn::MetaItem::{List, NameValue, Word};
-use syntax::attr::{self, HasAttrs};
+use syn::NestedMetaItem::{Literal, MetaItem};
-use syntax::codemap::{Span, Spanned, respan};
-use syntax::ext::base::ExtCtxt;
-use syntax::fold::Folder;
-use syntax::parse::parser::{Parser, PathStyle};
-use syntax::parse::token::{self, InternedString};
-use syntax::parse;
-use syntax::print::pprust::{lit_to_string, meta_item_to_string, meta_list_item_to_string};
-use syntax::tokenstream::{self, TokenTree};
 
 // This module handles parsing of `#[serde(...)]` attributes. The entrypoints
 // are `attr::Item::from_ast`, `attr::Variant::from_ast`, and
@@ -19,13 +11,14 @@ use syntax::tokenstream::{self, TokenTree};
 // user will see errors simultaneously for all bad attributes in the crate
 // rather than just the first.
 
-struct Attr<'a, 'b: 'a, T> {
+struct Attr<'c, T> {
-    cx: &'a ExtCtxt<'b>,
+    cx: &'c Ctxt,
     name: &'static str,
-    value: Option<Spanned<T>>,
+    value: Option<T>,
 }
-impl<'a, 'b, T> Attr<'a, 'b, T> {
+
-    fn none(cx: &'a ExtCtxt<'b>, name: &'static str) -> Self {
+impl<'c, T> Attr<'c, T> {
+    fn none(cx: &'c Ctxt, name: &'static str) -> Self {
         Attr {
             cx: cx,
             name: name,
@@ -33,47 +26,40 @@ impl<'a, 'b, T> Attr<'a, 'b, T> {
         }
     }
 
-    fn set(&mut self, span: Span, t: T) {
+    fn set(&mut self, value: T) {
-        if let Some(Spanned { span: prev_span, .. }) = self.value {
+        if self.value.is_some() {
-            let mut err = self.cx.struct_span_err(
+            self.cx.error(format!("duplicate serde attribute `{}`", self.name));
-                span,
-                &format!("duplicate serde attribute `{}`", self.name));
-            err.span_help(prev_span, "previously set here");
-            err.emit();
         } else {
-            self.value = Some(respan(span, t));
+            self.value = Some(value);
         }
     }
 
-    fn set_opt(&mut self, v: Option<Spanned<T>>) {
+    fn set_opt(&mut self, value: Option<T>) {
-        if let Some(v) = v {
+        if let Some(value) = value {
-            self.set(v.span, v.node);
+            self.set(value);
         }
     }
 
-    fn set_if_none(&mut self, span: Span, t: T) {
+    fn set_if_none(&mut self, value: T) {
         if self.value.is_none() {
-            self.value = Some(respan(span, t));
+            self.value = Some(value);
         }
     }
 
     fn get(self) -> Option<T> {
-        self.value.map(|spanned| spanned.node)
-    }
-
-    fn get_spanned(self) -> Option<Spanned<T>> {
         self.value
     }
 }
 
-struct BoolAttr<'a, 'b: 'a>(Attr<'a, 'b, ()>);
+struct BoolAttr<'c>(Attr<'c, ()>);
-impl<'a, 'b> BoolAttr<'a, 'b> {
+
-    fn none(cx: &'a ExtCtxt<'b>, name: &'static str) -> Self {
+impl<'c> BoolAttr<'c> {
+    fn none(cx: &'c Ctxt, name: &'static str) -> Self {
         BoolAttr(Attr::none(cx, name))
     }
 
-    fn set_true(&mut self, span: Span) {
+    fn set_true(&mut self) {
-        self.0.set(span, ());
+        self.0.set(());
     }
 
     fn get(&self) -> bool {
@@ -83,18 +69,18 @@ impl<'a, 'b> BoolAttr<'a, 'b> {
 
 #[derive(Debug)]
 pub struct Name {
-    serialize: InternedString,
+    serialize: String,
-    deserialize: InternedString,
+    deserialize: String,
 }
 
 impl Name {
     /// Return the container name for the container when serializing.
-    pub fn serialize_name(&self) -> InternedString {
+    pub fn serialize_name(&self) -> String {
         self.serialize.clone()
     }
 
     /// Return the container name for the container when deserializing.
-    pub fn deserialize_name(&self) -> InternedString {
+    pub fn deserialize_name(&self) -> String {
         self.deserialize.clone()
     }
 }
@@ -104,35 +90,32 @@ impl Name {
 pub struct Item {
     name: Name,
     deny_unknown_fields: bool,
-    ser_bound: Option<Vec<ast::WherePredicate>>,
+    ser_bound: Option<Vec<syn::WherePredicate>>,
-    de_bound: Option<Vec<ast::WherePredicate>>,
+    de_bound: Option<Vec<syn::WherePredicate>>,
 }
 
 impl Item {
     /// Extract out the `#[serde(...)]` attributes from an item.
-    pub fn from_ast(cx: &ExtCtxt, item: &ast::Item) -> Self {
+    pub fn from_ast(cx: &Ctxt, item: &syn::MacroInput) -> Self {
         let mut ser_name = Attr::none(cx, "rename");
         let mut de_name = Attr::none(cx, "rename");
         let mut deny_unknown_fields = BoolAttr::none(cx, "deny_unknown_fields");
         let mut ser_bound = Attr::none(cx, "bound");
         let mut de_bound = Attr::none(cx, "bound");
 
-        let ident = item.ident.name.as_str();
+        for meta_items in item.attrs.iter().filter_map(get_serde_meta_items) {
-
-        for meta_items in item.attrs().iter().filter_map(get_serde_meta_items) {
             for meta_item in meta_items {
-                let span = meta_item.span;
+                match meta_item {
-                match meta_item.node {
                     // Parse `#[serde(rename="foo")]`
-                    ast::MetaItemKind::NameValue(ref name, ref lit) if name == &"rename" => {
+                    MetaItem(NameValue(ref name, ref lit)) if name == "rename" => {
-                        if let Ok(s) = get_str_from_lit(cx, name, lit) {
+                        if let Ok(s) = get_string_from_lit(cx, name.as_ref(), name.as_ref(), lit) {
-                            ser_name.set(span, s.clone());
+                            ser_name.set(s.clone());
-                            de_name.set(span, s);
+                            de_name.set(s);
                         }
                     }
 
                     // Parse `#[serde(rename(serialize="foo", deserialize="bar"))]`
-                    ast::MetaItemKind::List(ref name, ref meta_items) if name == &"rename" => {
+                    MetaItem(List(ref name, ref meta_items)) if name == "rename" => {
                         if let Ok((ser, de)) = get_renames(cx, meta_items) {
                             ser_name.set_opt(ser);
                             de_name.set_opt(de);
@@ -140,31 +123,33 @@ impl Item {
                     }
 
                     // Parse `#[serde(deny_unknown_fields)]`
-                    ast::MetaItemKind::Word(ref name) if name == &"deny_unknown_fields" => {
+                    MetaItem(Word(ref name)) if name == "deny_unknown_fields" => {
-                        deny_unknown_fields.set_true(span);
+                        deny_unknown_fields.set_true();
                     }
 
                     // Parse `#[serde(bound="D: Serialize")]`
-                    ast::MetaItemKind::NameValue(ref name, ref lit) if name == &"bound" => {
+                    MetaItem(NameValue(ref name, ref lit)) if name == "bound" => {
-                        if let Ok(where_predicates) = parse_lit_into_where(cx, name, lit) {
+                        if let Ok(where_predicates) = parse_lit_into_where(cx, name.as_ref(), name.as_ref(), lit) {
-                            ser_bound.set(span, where_predicates.clone());
+                            ser_bound.set(where_predicates.clone());
-                            de_bound.set(span, where_predicates);
+                            de_bound.set(where_predicates);
                         }
                     }
 
                     // Parse `#[serde(bound(serialize="D: Serialize", deserialize="D: Deserialize"))]`
-                    ast::MetaItemKind::List(ref name, ref meta_items) if name == &"bound" => {
+                    MetaItem(List(ref name, ref meta_items)) if name == "bound" => {
                         if let Ok((ser, de)) = get_where_predicates(cx, meta_items) {
                             ser_bound.set_opt(ser);
                             de_bound.set_opt(de);
                         }
                     }
 
-                    _ => {
+                    MetaItem(ref meta_item) => {
-                        cx.span_err(
+                        cx.error(format!("unknown serde container attribute `{}`",
-                            meta_item.span,
+                                         meta_item.name()));
-                            &format!("unknown serde container attribute `{}`",
+                    }
-                                     meta_item_to_string(&meta_item)));
+
+                    Literal(_) => {
+                        cx.error(format!("unexpected literal in serde container attribute"));
                     }
                 }
             }
@@ -172,8 +157,8 @@ impl Item {
 
         Item {
             name: Name {
-                serialize: ser_name.get().unwrap_or(ident.clone()),
+                serialize: ser_name.get().unwrap_or_else(|| item.ident.to_string()),
-                deserialize: de_name.get().unwrap_or(ident),
+                deserialize: de_name.get().unwrap_or_else(|| item.ident.to_string()),
             },
             deny_unknown_fields: deny_unknown_fields.get(),
             ser_bound: ser_bound.get(),
@@ -189,11 +174,11 @@ impl Item {
         self.deny_unknown_fields
     }
 
-    pub fn ser_bound(&self) -> Option<&[ast::WherePredicate]> {
+    pub fn ser_bound(&self) -> Option<&[syn::WherePredicate]> {
         self.ser_bound.as_ref().map(|vec| &vec[..])
     }
 
-    pub fn de_bound(&self) -> Option<&[ast::WherePredicate]> {
+    pub fn de_bound(&self) -> Option<&[syn::WherePredicate]> {
         self.de_bound.as_ref().map(|vec| &vec[..])
     }
 }
@@ -205,37 +190,36 @@ pub struct Variant {
 }
 
 impl Variant {
-    pub fn from_ast(cx: &ExtCtxt, variant: &ast::Variant) -> Self {
+    pub fn from_ast(cx: &Ctxt, variant: &syn::Variant) -> Self {
         let mut ser_name = Attr::none(cx, "rename");
         let mut de_name = Attr::none(cx, "rename");
 
-        let ident = variant.node.name.name.as_str();
+        for meta_items in variant.attrs.iter().filter_map(get_serde_meta_items) {
-
-        for meta_items in variant.node.attrs.iter().filter_map(get_serde_meta_items) {
             for meta_item in meta_items {
-                let span = meta_item.span;
+                match meta_item {
-                match meta_item.node {
                     // Parse `#[serde(rename="foo")]`
-                    ast::MetaItemKind::NameValue(ref name, ref lit) if name == &"rename" => {
+                    MetaItem(NameValue(ref name, ref lit)) if name == "rename" => {
-                        if let Ok(s) = get_str_from_lit(cx, name, lit) {
+                        if let Ok(s) = get_string_from_lit(cx, name.as_ref(), name.as_ref(), lit) {
-                            ser_name.set(span, s.clone());
+                            ser_name.set(s.clone());
-                            de_name.set(span, s);
+                            de_name.set(s);
                         }
                     }
 
                     // Parse `#[serde(rename(serialize="foo", deserialize="bar"))]`
-                    ast::MetaItemKind::List(ref name, ref meta_items) if name == &"rename" => {
+                    MetaItem(List(ref name, ref meta_items)) if name == "rename" => {
                         if let Ok((ser, de)) = get_renames(cx, meta_items) {
                             ser_name.set_opt(ser);
                             de_name.set_opt(de);
                         }
                     }
 
-                    _ => {
+                    MetaItem(ref meta_item) => {
-                        cx.span_err(
+                        cx.error(format!("unknown serde variant attribute `{}`",
-                            meta_item.span,
+                                         meta_item.name()));
-                            &format!("unknown serde variant attribute `{}`",
+                    }
-                                     meta_item_to_string(&meta_item)));
+
+                    Literal(_) => {
+                        cx.error(format!("unexpected literal in serde variant attribute"));
                     }
                 }
             }
@@ -243,8 +227,8 @@ impl Variant {
 
         Variant {
             name: Name {
-                serialize: ser_name.get().unwrap_or(ident.clone()),
+                serialize: ser_name.get().unwrap_or_else(|| variant.ident.to_string()),
-                deserialize: de_name.get().unwrap_or(ident),
+                deserialize: de_name.get().unwrap_or_else(|| variant.ident.to_string()),
             },
         }
     }
@@ -260,12 +244,12 @@ pub struct Field {
     name: Name,
     skip_serializing: bool,
     skip_deserializing: bool,
-    skip_serializing_if: Option<ast::Path>,
+    skip_serializing_if: Option<syn::Path>,
     default: FieldDefault,
-    serialize_with: Option<ast::Path>,
+    serialize_with: Option<syn::Path>,
-    deserialize_with: Option<ast::Path>,
+    deserialize_with: Option<syn::Path>,
-    ser_bound: Option<Vec<ast::WherePredicate>>,
+    ser_bound: Option<Vec<syn::WherePredicate>>,
-    de_bound: Option<Vec<ast::WherePredicate>>,
+    de_bound: Option<Vec<syn::WherePredicate>>,
 }
 
 /// Represents the default to use for a field when deserializing.
@@ -276,14 +260,14 @@ pub enum FieldDefault {
     /// The default is given by `std::default::Default::default()`.
     Default,
     /// The default is given by this function.
-    Path(ast::Path),
+    Path(syn::Path),
 }
 
 impl Field {
     /// Extract out the `#[serde(...)]` attributes from a struct field.
-    pub fn from_ast(cx: &ExtCtxt,
+    pub fn from_ast(cx: &Ctxt,
                     index: usize,
-                    field: &ast::StructField) -> Self {
+                    field: &syn::Field) -> Self {
         let mut ser_name = Attr::none(cx, "rename");
         let mut de_name = Attr::none(cx, "rename");
         let mut skip_serializing = BoolAttr::none(cx, "skip_serializing");
@@ -296,24 +280,23 @@ impl Field {
         let mut de_bound = Attr::none(cx, "bound");
 
         let ident = match field.ident {
-            Some(ident) => ident.name.as_str(),
+            Some(ref ident) => ident.to_string(),
-            None => token::intern_and_get_ident(&index.to_string()),
+            None => index.to_string(),
         };
 
         for meta_items in field.attrs.iter().filter_map(get_serde_meta_items) {
             for meta_item in meta_items {
-                let span = meta_item.span;
+                match meta_item {
-                match meta_item.node {
                     // Parse `#[serde(rename="foo")]`
-                    ast::MetaItemKind::NameValue(ref name, ref lit) if name == &"rename" => {
+                    MetaItem(NameValue(ref name, ref lit)) if name == "rename" => {
-                        if let Ok(s) = get_str_from_lit(cx, name, lit) {
+                        if let Ok(s) = get_string_from_lit(cx, name.as_ref(), name.as_ref(), lit) {
-                            ser_name.set(span, s.clone());
+                            ser_name.set(s.clone());
-                            de_name.set(span, s);
+                            de_name.set(s);
                         }
                     }
 
                     // Parse `#[serde(rename(serialize="foo", deserialize="bar"))]`
-                    ast::MetaItemKind::List(ref name, ref meta_items) if name == &"rename" => {
+                    MetaItem(List(ref name, ref meta_items)) if name == "rename" => {
                         if let Ok((ser, de)) = get_renames(cx, meta_items) {
                             ser_name.set_opt(ser);
                             de_name.set_opt(de);
@@ -321,69 +304,71 @@ impl Field {
                     }
 
                     // Parse `#[serde(default)]`
-                    ast::MetaItemKind::Word(ref name) if name == &"default" => {
+                    MetaItem(Word(ref name)) if name == "default" => {
-                        default.set(span, FieldDefault::Default);
+                        default.set(FieldDefault::Default);
                     }
 
                     // Parse `#[serde(default="...")]`
-                    ast::MetaItemKind::NameValue(ref name, ref lit) if name == &"default" => {
+                    MetaItem(NameValue(ref name, ref lit)) if name == "default" => {
-                        if let Ok(path) = parse_lit_into_path(cx, name, lit) {
+                        if let Ok(path) = parse_lit_into_path(cx, name.as_ref(), lit) {
-                            default.set(span, FieldDefault::Path(path));
+                            default.set(FieldDefault::Path(path));
                         }
                     }
 
                     // Parse `#[serde(skip_serializing)]`
-                    ast::MetaItemKind::Word(ref name) if name == &"skip_serializing" => {
+                    MetaItem(Word(ref name)) if name == "skip_serializing" => {
-                        skip_serializing.set_true(span);
+                        skip_serializing.set_true();
                     }
 
                     // Parse `#[serde(skip_deserializing)]`
-                    ast::MetaItemKind::Word(ref name) if name == &"skip_deserializing" => {
+                    MetaItem(Word(ref name)) if name == "skip_deserializing" => {
-                        skip_deserializing.set_true(span);
+                        skip_deserializing.set_true();
                     }
 
                     // Parse `#[serde(skip_serializing_if="...")]`
-                    ast::MetaItemKind::NameValue(ref name, ref lit) if name == &"skip_serializing_if" => {
+                    MetaItem(NameValue(ref name, ref lit)) if name == "skip_serializing_if" => {
-                        if let Ok(path) = parse_lit_into_path(cx, name, lit) {
+                        if let Ok(path) = parse_lit_into_path(cx, name.as_ref(), lit) {
-                            skip_serializing_if.set(span, path);
+                            skip_serializing_if.set(path);
                         }
                     }
 
                     // Parse `#[serde(serialize_with="...")]`
-                    ast::MetaItemKind::NameValue(ref name, ref lit) if name == &"serialize_with" => {
+                    MetaItem(NameValue(ref name, ref lit)) if name == "serialize_with" => {
-                        if let Ok(path) = parse_lit_into_path(cx, name, lit) {
+                        if let Ok(path) = parse_lit_into_path(cx, name.as_ref(), lit) {
-                            serialize_with.set(span, path);
+                            serialize_with.set(path);
                         }
                     }
 
                     // Parse `#[serde(deserialize_with="...")]`
-                    ast::MetaItemKind::NameValue(ref name, ref lit) if name == &"deserialize_with" => {
+                    MetaItem(NameValue(ref name, ref lit)) if name == "deserialize_with" => {
-                        if let Ok(path) = parse_lit_into_path(cx, name, lit) {
+                        if let Ok(path) = parse_lit_into_path(cx, name.as_ref(), lit) {
-                            deserialize_with.set(span, path);
+                            deserialize_with.set(path);
                         }
                     }
 
                     // Parse `#[serde(bound="D: Serialize")]`
-                    ast::MetaItemKind::NameValue(ref name, ref lit) if name == &"bound" => {
+                    MetaItem(NameValue(ref name, ref lit)) if name == "bound" => {
-                        if let Ok(where_predicates) = parse_lit_into_where(cx, name, lit) {
+                        if let Ok(where_predicates) = parse_lit_into_where(cx, name.as_ref(), name.as_ref(), lit) {
-                            ser_bound.set(span, where_predicates.clone());
+                            ser_bound.set(where_predicates.clone());
-                            de_bound.set(span, where_predicates);
+                            de_bound.set(where_predicates);
                         }
                     }
 
                     // Parse `#[serde(bound(serialize="D: Serialize", deserialize="D: Deserialize"))]`
-                    ast::MetaItemKind::List(ref name, ref meta_items) if name == &"bound" => {
+                    MetaItem(List(ref name, ref meta_items)) if name == "bound" => {
                         if let Ok((ser, de)) = get_where_predicates(cx, meta_items) {
                             ser_bound.set_opt(ser);
                             de_bound.set_opt(de);
                         }
                     }
 
-                    _ => {
+                    MetaItem(ref meta_item) => {
-                        cx.span_err(
+                        cx.error(format!("unknown serde field attribute `{}`",
-                            meta_item.span,
+                                         meta_item.name()));
-                            &format!("unknown serde field attribute `{}`",
+                    }
-                                     meta_item_to_string(&meta_item)));
+
+                    Literal(_) => {
+                        cx.error(format!("unexpected literal in serde field attribute"));
                     }
                 }
             }
@@ -391,8 +376,8 @@ impl Field {
 
         // Is skip_deserializing, initialize the field to Default::default()
         // unless a different default is specified by `#[serde(default="...")]`
-        if let Some(Spanned { span, .. }) = skip_deserializing.0.value {
+        if skip_deserializing.0.value.is_some() {
-            default.set_if_none(span, FieldDefault::Default);
+            default.set_if_none(FieldDefault::Default);
         }
 
         Field {
@@ -423,7 +408,7 @@ impl Field {
         self.skip_deserializing
     }
 
-    pub fn skip_serializing_if(&self) -> Option<&ast::Path> {
+    pub fn skip_serializing_if(&self) -> Option<&syn::Path> {
         self.skip_serializing_if.as_ref()
     }
 
@@ -431,230 +416,106 @@ impl Field {
         &self.default
     }
 
-    pub fn serialize_with(&self) -> Option<&ast::Path> {
+    pub fn serialize_with(&self) -> Option<&syn::Path> {
         self.serialize_with.as_ref()
     }
 
-    pub fn deserialize_with(&self) -> Option<&ast::Path> {
+    pub fn deserialize_with(&self) -> Option<&syn::Path> {
         self.deserialize_with.as_ref()
     }
 
-    pub fn ser_bound(&self) -> Option<&[ast::WherePredicate]> {
+    pub fn ser_bound(&self) -> Option<&[syn::WherePredicate]> {
         self.ser_bound.as_ref().map(|vec| &vec[..])
     }
 
-    pub fn de_bound(&self) -> Option<&[ast::WherePredicate]> {
+    pub fn de_bound(&self) -> Option<&[syn::WherePredicate]> {
         self.de_bound.as_ref().map(|vec| &vec[..])
     }
 }
 
-type SerAndDe<T> = (Option<Spanned<T>>, Option<Spanned<T>>);
+type SerAndDe<T> = (Option<T>, Option<T>);
 
 fn get_ser_and_de<T, F>(
-    cx: &ExtCtxt,
+    cx: &Ctxt,
-    attribute: &'static str,
+    attr_name: &'static str,
-    items: &[ast::NestedMetaItem],
+    items: &[syn::NestedMetaItem],
     f: F
 ) -> Result<SerAndDe<T>, ()>
-    where F: Fn(&ExtCtxt, &str, &ast::Lit) -> Result<T, ()>,
+    where F: Fn(&Ctxt, &str, &str, &syn::Lit) -> Result<T, ()>,
 {
-    let mut ser_item = Attr::none(cx, attribute);
+    let mut ser_item = Attr::none(cx, attr_name);
-    let mut de_item = Attr::none(cx, attribute);
+    let mut de_item = Attr::none(cx, attr_name);
 
     for item in items {
-        match item.node {
+        match *item {
-            ast::NestedMetaItemKind::MetaItem(ref meta_item) => {
+            MetaItem(NameValue(ref name, ref lit)) if name == "serialize" => {
-                match meta_item.node {
+                if let Ok(v) = f(cx, attr_name, name.as_ref(), lit) {
-                    ast::MetaItemKind::NameValue(ref name, ref lit) if name == &"serialize" => {
+                    ser_item.set(v);
-                        if let Ok(v) = f(cx, name, lit) {
+                }
-                            ser_item.set(item.span, v);
+            }
-                        }
-                    }
 
-                    ast::MetaItemKind::NameValue(ref name, ref lit) if name == &"deserialize" => {
+            MetaItem(NameValue(ref name, ref lit)) if name == "deserialize" => {
-                        if let Ok(v) = f(cx, name, lit) {
+                if let Ok(v) = f(cx, attr_name, name.as_ref(), lit) {
-                            de_item.set(item.span, v);
+                    de_item.set(v);
-                        }
-                    }
-
-                    _ => {
-                        cx.span_err(
-                            item.span,
-                            &format!("unknown {} attribute `{}`",
-                                    attribute,
-                                    meta_item_to_string(meta_item)));
-
-                        return Err(());
-                    }
                 }
             }
 
             _ => {
-                cx.span_err(
+                cx.error(format!("malformed {0} attribute, expected `{0}(serialize = ..., deserialize = ...)`",
-                    item.span,
+                                 attr_name));
-                    &format!("unknown {} attribute `{}`",
-                             attribute,
-                             meta_list_item_to_string(item)));
-
                 return Err(());
             }
         }
     }
 
-    Ok((ser_item.get_spanned(), de_item.get_spanned()))
+    Ok((ser_item.get(), de_item.get()))
 }
 
 fn get_renames(
-    cx: &ExtCtxt,
+    cx: &Ctxt,
-    items: &[ast::NestedMetaItem],
+    items: &[syn::NestedMetaItem],
-) -> Result<SerAndDe<InternedString>, ()> {
+) -> Result<SerAndDe<String>, ()> {
-    get_ser_and_de(cx, "rename", items, get_str_from_lit)
+    get_ser_and_de(cx, "rename", items, get_string_from_lit)
 }
 
 fn get_where_predicates(
-    cx: &ExtCtxt,
+    cx: &Ctxt,
-    items: &[ast::NestedMetaItem],
+    items: &[syn::NestedMetaItem],
-) -> Result<SerAndDe<Vec<ast::WherePredicate>>, ()> {
+) -> Result<SerAndDe<Vec<syn::WherePredicate>>, ()> {
     get_ser_and_de(cx, "bound", items, parse_lit_into_where)
 }
 
-pub fn get_serde_meta_items(attr: &ast::Attribute) -> Option<Vec<ast::MetaItem>> {
+pub fn get_serde_meta_items(attr: &syn::Attribute) -> Option<Vec<syn::NestedMetaItem>> {
-    match attr.node.value.node {
+    match attr.value {
-        ast::MetaItemKind::List(ref name, ref items) if name == &"serde" => {
+        List(ref name, ref items) if name == "serde" => {
-            attr::mark_used(attr);
+            Some(items.iter().cloned().collect())
-            Some(items.iter().filter_map(|item| {
-                match item.node {
-                    ast::NestedMetaItemKind::MetaItem(ref meta_item) => {
-                        Some((*meta_item.clone()).clone())
-                    }
-                    _ => None,
-                }
-            }).collect())
         }
         _ => None
     }
 }
 
-/// This syntax folder rewrites tokens to say their spans are coming from a macro context.
+fn get_string_from_lit(cx: &Ctxt, attr_name: &str, meta_item_name: &str, lit: &syn::Lit) -> Result<String, ()> {
-struct Respanner<'a, 'b: 'a> {
+    if let syn::Lit::Str(ref s, _) = *lit {
-    cx: &'a ExtCtxt<'b>,
+        Ok(s.clone())
-}
+    } else {
-
+        cx.error(format!("expected serde {} attribute to be a string: `{} = \"...\"`",
-impl<'a, 'b> Folder for Respanner<'a, 'b> {
+                         attr_name, meta_item_name));
-    fn fold_tt(&mut self, tt: &TokenTree) -> TokenTree {
+        Err(())
-        match *tt {
-            TokenTree::Token(span, ref tok) => {
-                TokenTree::Token(
-                    self.new_span(span),
-                    self.fold_token(tok.clone())
-                )
-            }
-            TokenTree::Delimited(span, ref delimed) => {
-                TokenTree::Delimited(
-                    self.new_span(span),
-                    Rc::new(tokenstream::Delimited {
-                        delim: delimed.delim,
-                        open_span: delimed.open_span,
-                        tts: self.fold_tts(&delimed.tts),
-                        close_span: delimed.close_span,
-                    })
-                )
-            }
-            TokenTree::Sequence(span, ref seq) => {
-                TokenTree::Sequence(
-                    self.new_span(span),
-                    Rc::new(tokenstream::SequenceRepetition {
-                        tts: self.fold_tts(&seq.tts),
-                        separator: seq.separator.clone().map(|tok| self.fold_token(tok)),
-                        ..**seq
-                    })
-                )
-            }
-        }
-    }
-
-    fn new_span(&mut self, span: Span) -> Span {
-        Span {
-            lo: span.lo,
-            hi: span.hi,
-            expn_id: self.cx.backtrace(),
-        }
     }
 }
 
-fn get_str_from_lit(cx: &ExtCtxt, name: &str, lit: &ast::Lit) -> Result<InternedString, ()> {
+fn parse_lit_into_path(cx: &Ctxt, attr_name: &str, lit: &syn::Lit) -> Result<syn::Path, ()> {
-    match lit.node {
+    let string = try!(get_string_from_lit(cx, attr_name, attr_name, lit));
-        ast::LitKind::Str(ref s, _) => Ok(s.clone()),
+    syn::parse_path(&string).map_err(|err| cx.error(err))
-        _ => {
-            cx.span_err(
-                lit.span,
-                &format!("serde annotation `{}` must be a string, not `{}`",
-                         name,
-                         lit_to_string(lit)));
-
-            Err(())
-        }
-    }
 }
 
-// If we just parse a string literal from an attibute, any syntax errors in the
+fn parse_lit_into_where(cx: &Ctxt, attr_name: &str, meta_item_name: &str, lit: &syn::Lit) -> Result<Vec<syn::WherePredicate>, ()> {
-// source will only have spans that point inside the string and not back to the
+    let string = try!(get_string_from_lit(cx, attr_name, meta_item_name, lit));
-// attribute. So to have better error reporting, we'll first parse the string
-// into a token tree. Then we'll update those spans to say they're coming from a
-// macro context that originally came from the attribnute, and then finally
-// parse them into an expression or where-clause.
-fn parse_string_via_tts<T, F>(cx: &ExtCtxt, name: &str, string: String, action: F) -> Result<T, ()>
-    where F: for<'a> Fn(&'a mut Parser) -> parse::PResult<'a, T>,
-{
-    let tts = panictry!(parse::parse_tts_from_source_str(
-        format!("<serde {} expansion>", name),
-        string,
-        cx.cfg(),
-        cx.parse_sess()));
-
-    // Respan the spans to say they are all coming from this macro.
-    let tts = Respanner { cx: cx }.fold_tts(&tts);
-
-    let mut parser = parse::new_parser_from_tts(cx.parse_sess(), cx.cfg(), tts);
-
-    let path = match action(&mut parser) {
-        Ok(path) => path,
-        Err(mut e) => {
-            e.emit();
-            return Err(());
-        }
-    };
-
-    // Make sure to error out if there are trailing characters in the stream.
-    match parser.expect(&token::Eof) {
-        Ok(()) => { }
-        Err(mut e) => {
-            e.emit();
-            return Err(());
-        }
-    }
-
-    Ok(path)
-}
-
-fn parse_lit_into_path(cx: &ExtCtxt, name: &str, lit: &ast::Lit) -> Result<ast::Path, ()> {
-    let string = try!(get_str_from_lit(cx, name, lit)).to_string();
-
-    parse_string_via_tts(cx, name, string, |parser| {
-        parser.parse_path(PathStyle::Type)
-    })
-}
-
-fn parse_lit_into_where(cx: &ExtCtxt, name: &str, lit: &ast::Lit) -> Result<Vec<ast::WherePredicate>, ()> {
-    let string = try!(get_str_from_lit(cx, name, lit));
     if string.is_empty() {
         return Ok(Vec::new());
     }
 
     let where_string = format!("where {}", string);
 
-    parse_string_via_tts(cx, name, where_string, |parser| {
+    syn::parse_where_clause(&where_string).map(|wh| wh.predicates).map_err(|err| cx.error(err))
-        let where_clause = try!(parser.parse_where_clause());
-        Ok(where_clause.predicates)
-    })
 }

serde_codegen_internals/src/ctxt.rs

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

serde_codegen_internals/src/error.rs

@@ -1,19 +0,0 @@
-use std::error;
-use std::fmt;
-
-#[derive(Debug)]
-pub enum Error {
-    UnexpectedItemKind,
-}
-
-impl fmt::Display for Error {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        write!(f, "expected a struct or enum")
-    }
-}
-
-impl error::Error for Error {
-    fn description(&self) -> &str {
-        "expected a struct or enum"
-    }
-}

serde_codegen_internals/src/lib.rs

@@ -1,21 +1,10 @@
 #![cfg_attr(feature = "clippy", plugin(clippy))]
 #![cfg_attr(feature = "clippy", feature(plugin))]
-#![cfg_attr(not(feature = "with-syntex"), feature(rustc_private, plugin))]
 
-#[cfg(feature = "with-syntex")]
+extern crate syn;
-#[macro_use]
-extern crate syntex_syntax as syntax;
-#[cfg(feature = "with-syntex")]
-extern crate syntex_errors as errors;
-
-#[cfg(not(feature = "with-syntex"))]
-#[macro_use]
-extern crate syntax;
-#[cfg(not(feature = "with-syntex"))]
-extern crate rustc_errors as errors;
 
 pub mod ast;
 pub mod attr;
 
-mod error;
+mod ctxt;
-pub use error::Error;
+pub use ctxt::Ctxt;

serde_derive/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "serde_derive"
-version = "0.8.7"
+version = "0.8.18"
 authors = ["Erick Tryzelaar <erick.tryzelaar@gmail.com>"]
 license = "MIT/Apache-2.0"
 description = "Macros 1.1 implementation of #[derive(Serialize, Deserialize)]"
@@ -12,12 +12,16 @@ include = ["Cargo.toml", "src/**/*.rs"]
 
 [lib]
 name = "serde_derive"
-rustc-macro = true
+proc-macro = true
 
-[dependencies]
+[dependencies.serde_codegen]
-serde_codegen = { version = "=0.8.7", path = "../serde_codegen" }
+version = "=0.8.18"
+path = "../serde_codegen"
+default-features = false
+features = ["with-syn"]
 
 [dev-dependencies]
+compiletest_rs = "^0.2.0"
 fnv = "1.0"
-serde = { version = "0.8.7", path = "../serde" }
+serde = { version = "0.8.18", path = "../serde" }
-serde_test = { version = "0.8.7", path = "../serde_test" }
+serde_test = { version = "0.8.18", path = "../serde_test" }

serde_derive/src/lib.rs

@@ -1,21 +1,23 @@
-#![feature(rustc_macro, rustc_macro_lib)]
+#![feature(proc_macro, proc_macro_lib)]
 #![cfg(not(test))]
 
-extern crate rustc_macro;
+extern crate proc_macro;
 extern crate serde_codegen;
 
-use rustc_macro::TokenStream;
+use proc_macro::TokenStream;
 
-#[rustc_macro_derive(Serialize)]
+#[proc_macro_derive(Serialize, attributes(serde))]
 pub fn derive_serialize(input: TokenStream) -> TokenStream {
-    let item = format!("#[derive(Serialize)]\n{}", input);
+    match serde_codegen::expand_derive_serialize(&input.to_string()) {
-    let expanded = serde_codegen::expand_str(&item).unwrap();
+        Ok(expanded) => expanded.parse().unwrap(),
-    expanded.parse().unwrap()
+        Err(msg) => panic!(msg),
+    }
 }
 
-#[rustc_macro_derive(Deserialize)]
+#[proc_macro_derive(Deserialize, attributes(serde))]
 pub fn derive_deserialize(input: TokenStream) -> TokenStream {
-    let item = format!("#[derive(Deserialize)]\n{}", input);
+    match serde_codegen::expand_derive_deserialize(&input.to_string()) {
-    let expanded = serde_codegen::expand_str(&item).unwrap();
+        Ok(expanded) => expanded.parse().unwrap(),
-    expanded.parse().unwrap()
+        Err(msg) => panic!(msg),
+    }
 }

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

@@ -0,0 +1,12 @@
+#![feature(proc_macro)]
+
+#[macro_use]
+extern crate serde_derive;
+
+#[derive(Serialize)] //~ ERROR: custom derive attribute panicked
+struct S {
+    #[serde(rename="x", serialize="y")] //~^^ HELP: unknown serde field attribute `serialize`
+    x: (),
+}
+
+fn main() {}

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

@@ -0,0 +1,13 @@
+#![feature(proc_macro)]
+
+#[macro_use]
+extern crate serde_derive;
+
+#[derive(Serialize)] //~ ERROR: custom derive attribute panicked
+struct S {
+    #[serde(rename="x")]
+    #[serde(rename(deserialize="y"))] //~^^^ HELP: duplicate serde attribute `rename`
+    x: (),
+}
+
+fn main() {}

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

@@ -0,0 +1,12 @@
+#![feature(proc_macro)]
+
+#[macro_use]
+extern crate serde_derive;
+
+#[derive(Serialize)] //~ ERROR: custom derive attribute panicked
+struct S {
+    #[serde(rename(serialize="x"), rename(serialize="y"))] //~^^ HELP: duplicate serde attribute `rename`
+    x: (),
+}
+
+fn main() {}

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

@@ -0,0 +1,13 @@
+#![feature(proc_macro)]
+
+#[macro_use]
+extern crate serde_derive;
+
+#[derive(Serialize)] //~ ERROR: custom derive attribute panicked
+struct S {
+    #[serde(rename(serialize="x"))]
+    #[serde(rename="y")] //~^^^ HELP: duplicate serde attribute `rename`
+    x: (),
+}
+
+fn main() {}

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

@@ -0,0 +1,12 @@
+#![feature(proc_macro)]
+
+#[macro_use]
+extern crate serde_derive;
+
+#[derive(Serialize)] //~ ERROR: custom derive attribute panicked
+struct S {
+    #[serde(rename(serialize="x", serialize="y"))] //~^^ HELP: duplicate serde attribute `rename`
+    x: (),
+}
+
+fn main() {}

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

@@ -0,0 +1,13 @@
+#![feature(proc_macro)]
+
+#[macro_use]
+extern crate serde_derive;
+
+#[derive(Serialize)] //~ ERROR: custom derive attribute panicked
+struct S {
+    #[serde(rename(serialize="x"))]
+    #[serde(rename(serialize="y"))] //~^^^ HELP: duplicate serde attribute `rename`
+    x: (),
+}
+
+fn main() {}

serde_derive/tests/compile-fail/str_ref_deser.rs

@@ -0,0 +1,11 @@
+#![feature(proc_macro)]
+
+#[macro_use]
+extern crate serde_derive;
+
+#[derive(Serialize, Deserialize)] //~ ERROR: custom derive attribute panicked
+struct Test<'a> {
+    s: &'a str, //~^^ HELP: Serde does not support deserializing fields of type &str
+}
+
+fn main() {}

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

@@ -0,0 +1,12 @@
+#![feature(proc_macro)]
+
+#[macro_use]
+extern crate serde_derive;
+
+#[derive(Serialize)] //~ ERROR: custom derive attribute panicked
+#[serde(abc="xyz")] //~^ HELP: unknown serde container attribute `abc`
+struct A {
+    x: u32,
+}
+
+fn main() { }

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

@@ -0,0 +1,12 @@
+#![feature(proc_macro)]
+
+#[macro_use]
+extern crate serde_derive;
+
+#[derive(Serialize)] //~ ERROR: custom derive attribute panicked
+struct C {
+    #[serde(abc="xyz")] //~^^ HELP: unknown serde field attribute `abc`
+    x: u32,
+}
+
+fn main() { }

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

@@ -0,0 +1,12 @@
+#![feature(proc_macro)]
+
+#[macro_use]
+extern crate serde_derive;
+
+#[derive(Serialize)] //~ ERROR: custom derive attribute panicked
+enum E {
+    #[serde(abc="xyz")] //~^^ HELP: unknown serde variant attribute `abc`
+    V,
+}
+
+fn main() { }

serde_derive/tests/run-pass/identity-op.rs

@@ -1,8 +1,9 @@
-#![feature(custom_derive, plugin)]
+#![feature(proc_macro)]
-#![plugin(serde_macros, clippy)]
-
 #![deny(identity_op)]
 
+#[macro_use]
+extern crate serde_derive;
+
 // The derived implementation uses 0+1 to add up the number of fields
 // serialized, which Clippy warns about. If the expansion info is registered
 // correctly, the Clippy lint is not triggered.

serde_derive/tests/test.rs

@@ -1,4 +1,4 @@
-#![feature(test, rustc_macro, rustc_attrs)]
+#![feature(test, proc_macro)]
 
 #[macro_use]
 extern crate serde_derive;
@@ -6,3 +6,5 @@ extern crate serde_derive;
 extern crate test;
 
 include!("../../testing/tests/test.rs.in");
+
+mod compile_tests;

serde_macros/.cargo/config

@@ -1,2 +0,0 @@
-# To prevent compiletest from seeing two versions of serde
-paths = ["../serde"]

serde_macros/.gitignore

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

serde_macros/Cargo.toml

@@ -1,41 +0,0 @@
-[package]
-name = "serde_macros"
-version = "0.8.7"
-authors = ["Erick Tryzelaar <erick.tryzelaar@gmail.com>"]
-license = "MIT/Apache-2.0"
-description = "Macros to auto-generate implementations for the serde framework"
-homepage = "https://serde.rs"
-repository = "https://github.com/serde-rs/serde"
-documentation = "https://serde.rs/codegen.html"
-keywords = ["serde", "serialization"]
-include = ["Cargo.toml", "src/**/*.rs"]
-
-[lib]
-name = "serde_macros"
-plugin = true
-
-[features]
-unstable-testing = [
-    "clippy",
-    "serde/unstable-testing",
-    "serde_codegen/unstable-testing"
-]
-
-[dependencies]
-clippy = { version = "^0.*", optional = true }
-serde_codegen = { version = "=0.8.7", default-features = false, features = ["unstable"], path = "../serde_codegen" }
-
-[dev-dependencies]
-compiletest_rs = "^0.2.0"
-fnv = "1.0"
-rustc-serialize = "^0.3.16"
-serde = { version = "0.8.7", path = "../serde" }
-serde_test = { version = "0.8.7", path = "../serde_test" }
-
-[[test]]
-name = "test"
-path = "tests/test.rs"
-
-[[bench]]
-name = "bench"
-path = "benches/bench.rs"

serde_macros/benches/bench.rs

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

serde_macros/src/lib.rs

@@ -1,12 +0,0 @@
-#![feature(plugin_registrar, rustc_private)]
-#![cfg_attr(feature = "clippy", feature(plugin))]
-#![cfg_attr(feature = "clippy", plugin(clippy))]
-
-extern crate serde_codegen;
-extern crate rustc_plugin;
-
-#[plugin_registrar]
-#[doc(hidden)]
-pub fn plugin_registrar(reg: &mut rustc_plugin::Registry) {
-    serde_codegen::register(reg);
-}

serde_macros/tests/compile-fail/duplicate_attributes.rs

@@ -1,32 +0,0 @@
-#![feature(custom_attribute, custom_derive, plugin)]
-#![plugin(serde_macros)]
-
-#[derive(Serialize)]
-struct S {
-    #[serde(rename(serialize="x"))]
-    #[serde(rename(serialize="y"))] //~ ERROR: duplicate serde attribute `rename`
-    a: (),
-
-    #[serde(rename(serialize="x"))]
-    #[serde(rename="y")] //~ ERROR: duplicate serde attribute `rename`
-    b: (),
-
-    #[serde(rename(serialize="x"))]
-    #[serde(rename(deserialize="y"))] // ok
-    c: (),
-
-    #[serde(rename="x")]
-    #[serde(rename(deserialize="y"))] //~ ERROR: duplicate serde attribute `rename`
-    d: (),
-
-    #[serde(rename(serialize="x", serialize="y"))] //~ ERROR: duplicate serde attribute `rename`
-    e: (),
-
-    #[serde(rename="x", serialize="y")] //~ ERROR: unknown serde field attribute `serialize = "y"`
-    f: (),
-
-    #[serde(rename(serialize="x"), rename(serialize="y"))] //~ ERROR: duplicate serde attribute `rename`
-    g: (),
-}
-
-fn main() {}

serde_macros/tests/compile-fail/reject-unknown-attributes.rs

@@ -1,30 +0,0 @@
-#![feature(custom_attribute, custom_derive, plugin)]
-#![plugin(serde_macros)]
-
-extern crate serde;
-
-#[derive(Serialize)]
-#[serde(abc="xyz")] //~ unknown serde container attribute `abc = "xyz"`
-struct Foo {
-    x: u32,
-}
-
-#[derive(Deserialize)]
-#[serde(abc="xyz")] //~ unknown serde container attribute `abc = "xyz"`
-struct Foo {
-    x: u32,
-}
-
-#[derive(Serialize)]
-struct Foo {
-    #[serde(abc="xyz")] //~ unknown serde field attribute `abc = "xyz"`
-    x: u32,
-}
-
-#[derive(Deserialize)]
-struct Foo {
-    #[serde(abc="xyz")] //~ unknown serde field attribute `abc = "xyz"`
-    x: u32,
-}
-
-fn main() { }

serde_macros/tests/compile-fail/str_ref_deser.rs

@@ -1,9 +0,0 @@
-#![feature(custom_attribute, custom_derive, plugin)]
-#![plugin(serde_macros)]
-
-#[derive(Serialize, Deserialize)]
-struct Test<'a> {
-    s: &'a str, //~ ERROR: Serde does not support deserializing fields of type &str
-}
-
-fn main() {}

serde_macros/tests/test.rs

@@ -1,8 +0,0 @@
-#![feature(test, custom_attribute, custom_derive, plugin)]
-#![plugin(serde_macros)]
-
-extern crate test;
-
-include!("../../testing/tests/test.rs.in");
-
-mod compile_tests;

serde_test/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "serde_test"
-version = "0.8.7"
+version = "0.8.18"
 authors = ["Erick Tryzelaar <erick.tryzelaar@gmail.com>"]
 license = "MIT/Apache-2.0"
 description = "Token De/Serializer for testing De/Serialize implementations"
@@ -12,4 +12,4 @@ keywords = ["serde", "serialization"]
 include = ["Cargo.toml", "src/**/*.rs"]
 
 [dependencies]
-serde = { version = "0.8.7", path = "../serde" }
+serde = { version = "0.8.18", path = "../serde" }

testing/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "serde_testing"
-version = "0.8.7"
+version = "0.8.18"
 authors = ["Erick Tryzelaar <erick.tryzelaar@gmail.com>"]
 license = "MIT/Apache-2.0"
 description = "A generic serialization/deserialization framework"
@@ -29,7 +29,3 @@ clippy = { version = "^0.*", optional = true }
 [[test]]
 name = "test"
 path = "tests/test.rs"
-
-[[bench]]
-name = "bench"
-path = "benches/bench.rs"

testing/benches/bench.rs

@@ -1,9 +0,0 @@
-#![feature(test)]
-#![cfg_attr(feature = "clippy", feature(plugin))]
-#![cfg_attr(feature = "clippy", plugin(clippy))]
-
-extern crate rustc_serialize;
-extern crate serde;
-extern crate test;
-
-include!(concat!(env!("OUT_DIR"), "/bench.rs"));

testing/benches/bench.rs.in

@@ -1,4 +0,0 @@
-mod bench_enum;
-mod bench_map;
-mod bench_struct;
-mod bench_vec;

testing/benches/bench_enum.rs

@@ -1,466 +0,0 @@
-use test::Bencher;
-use std::error;
-use std::fmt;
-use rustc_serialize::Decodable;
-use serde;
-use serde::de::Deserialize;
-
-//////////////////////////////////////////////////////////////////////////////
-
-#[derive(Clone, PartialEq, Debug, RustcDecodable, Deserialize)]
-pub enum Animal {
-    Dog,
-    Frog(String, isize)
-}
-
-//////////////////////////////////////////////////////////////////////////////
-
-#[derive(Debug)]
-pub enum Error {
-    EndOfStream,
-    Syntax,
-}
-
-impl serde::de::Error for Error {
-    fn custom<T: Into<String>>(_: T) -> Error { Error::Syntax }
-
-    fn end_of_stream() -> Error { Error::EndOfStream }
-
-    fn unknown_field(_: &str) -> Error { Error::Syntax }
-
-    fn missing_field(_: &'static str) -> Error { Error::Syntax }
-}
-
-impl fmt::Display for Error {
-    fn fmt(&self, formatter: &mut fmt::Formatter) -> Result<(), fmt::Error> {
-        formatter.write_str(format!("{:?}", self).as_ref())
-    }
-}
-
-impl error::Error for Error {
-    fn description(&self) -> &str {
-        "Serde Deserialization Error"
-    }
-
-    fn cause(&self) -> Option<&error::Error> {
-        None
-    }
-}
-
-//////////////////////////////////////////////////////////////////////////////
-
-mod decoder {
-    use rustc_serialize::Decoder;
-
-    use super::{Animal, Error};
-    use super::Animal::{Dog, Frog};
-
-    enum State {
-        Animal(Animal),
-        Isize(isize),
-        String(String),
-    }
-
-    pub struct AnimalDecoder {
-        stack: Vec<State>,
-
-    }
-
-    impl AnimalDecoder {
-        #[inline]
-        pub fn new(animal: Animal) -> AnimalDecoder {
-            AnimalDecoder {
-                stack: vec!(State::Animal(animal)),
-            }
-        }
-    }
-
-    impl Decoder for AnimalDecoder {
-        type Error = Error;
-
-        fn error(&mut self, _: &str) -> Error { Error::Syntax }
-
-        // Primitive types:
-        fn read_nil(&mut self) -> Result<(), Error> { Err(Error::Syntax) }
-        fn read_usize(&mut self) -> Result<usize, Error> { Err(Error::Syntax) }
-        fn read_u64(&mut self) -> Result<u64, Error> { Err(Error::Syntax) }
-        fn read_u32(&mut self) -> Result<u32, Error> { Err(Error::Syntax) }
-        fn read_u16(&mut self) -> Result<u16, Error> { Err(Error::Syntax) }
-        fn read_u8(&mut self) -> Result<u8, Error> { Err(Error::Syntax) }
-        #[inline]
-        fn read_isize(&mut self) -> Result<isize, Error> {
-            match self.stack.pop() {
-                Some(State::Isize(x)) => Ok(x),
-                _ => Err(Error::Syntax),
-            }
-        }
-        fn read_i64(&mut self) -> Result<i64, Error> { Err(Error::Syntax) }
-        fn read_i32(&mut self) -> Result<i32, Error> { Err(Error::Syntax) }
-        fn read_i16(&mut self) -> Result<i16, Error> { Err(Error::Syntax) }
-        fn read_i8(&mut self) -> Result<i8, Error> { Err(Error::Syntax) }
-        fn read_bool(&mut self) -> Result<bool, Error> { Err(Error::Syntax) }
-        fn read_f64(&mut self) -> Result<f64, Error> { Err(Error::Syntax) }
-        fn read_f32(&mut self) -> Result<f32, Error> { Err(Error::Syntax) }
-        fn read_char(&mut self) -> Result<char, Error> { Err(Error::Syntax) }
-        #[inline]
-        fn read_str(&mut self) -> Result<String, Error> {
-            match self.stack.pop() {
-                Some(State::String(x)) => Ok(x),
-                _ => Err(Error::Syntax),
-            }
-        }
-
-        // Compound types:
-        #[inline]
-        fn read_enum<T, F>(&mut self, name: &str, f: F) -> Result<T, Error> where
-            F: FnOnce(&mut AnimalDecoder) -> Result<T, Error>,
-        {
-            match self.stack.pop() {
-                Some(State::Animal(animal)) => {
-                    self.stack.push(State::Animal(animal));
-                    if name == "Animal" {
-                        f(self)
-                    } else {
-                        Err(Error::Syntax)
-                    }
-                }
-                _ => Err(Error::Syntax)
-            }
-        }
-
-        #[inline]
-        fn read_enum_variant<T, F>(&mut self, names: &[&str], f: F) -> Result<T, Error> where
-            F: FnOnce(&mut AnimalDecoder, usize) -> Result<T, Error>,
-        {
-            let name = match self.stack.pop() {
-                Some(State::Animal(Dog)) => "Dog",
-                Some(State::Animal(Frog(x0, x1))) => {
-                    self.stack.push(State::Isize(x1));
-                    self.stack.push(State::String(x0));
-                    "Frog"
-                }
-                _ => { return Err(Error::Syntax); }
-            };
-
-            let idx = match names.iter().position(|n| *n == name) {
-                Some(idx) => idx,
-                None => { return Err(Error::Syntax); }
-            };
-
-            f(self, idx)
-        }
-
-        #[inline]
-        fn read_enum_variant_arg<T, F>(&mut self, _a_idx: usize, f: F) -> Result<T, Error> where
-            F: FnOnce(&mut AnimalDecoder) -> Result<T, Error>,
-        {
-            f(self)
-        }
-
-        fn read_enum_struct_variant<T, F>(&mut self, _names: &[&str], _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut AnimalDecoder, usize) -> Result<T, Error>,
-        {
-            Err(Error::Syntax)
-        }
-
-        fn read_enum_struct_variant_field<T, F>(&mut self, _f_name: &str, _f_idx: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut AnimalDecoder) -> Result<T, Error>,
-        {
-            Err(Error::Syntax)
-        }
-
-        fn read_struct<T, F>(&mut self, _s_name: &str, _len: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut AnimalDecoder) -> Result<T, Error>,
-        {
-            Err(Error::Syntax)
-        }
-
-        fn read_struct_field<T, F>(&mut self, _f_name: &str, _f_idx: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut AnimalDecoder) -> Result<T, Error>,
-        {
-            Err(Error::Syntax)
-        }
-
-        fn read_tuple<T, F>(&mut self, _len: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut AnimalDecoder) -> Result<T, Error>,
-        {
-            Err(Error::Syntax)
-        }
-
-        fn read_tuple_arg<T, F>(&mut self, _a_idx: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut AnimalDecoder) -> Result<T, Error>,
-        {
-            Err(Error::Syntax)
-        }
-
-        fn read_tuple_struct<T, F>(&mut self, _s_name: &str, _len: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut AnimalDecoder) -> Result<T, Error>,
-        {
-            Err(Error::Syntax)
-        }
-
-        fn read_tuple_struct_arg<T, F>(&mut self, _a_idx: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut AnimalDecoder) -> Result<T, Error>,
-        {
-            Err(Error::Syntax)
-        }
-
-        // Specialized types:
-        fn read_option<T, F>(&mut self, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut AnimalDecoder, bool) -> Result<T, Error>,
-        {
-            Err(Error::Syntax)
-        }
-
-        #[inline]
-        fn read_seq<T, F>(&mut self, f: F) -> Result<T, Error> where
-            F: FnOnce(&mut AnimalDecoder, usize) -> Result<T, Error>,
-        {
-            f(self, 3)
-        }
-
-        #[inline]
-        fn read_seq_elt<T, F>(&mut self, _idx: usize, f: F) -> Result<T, Error> where
-            F: FnOnce(&mut AnimalDecoder) -> Result<T, Error>,
-        {
-            f(self)
-        }
-
-        fn read_map<T, F>(&mut self, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut AnimalDecoder, usize) -> Result<T, Error>,
-        {
-            Err(Error::Syntax)
-        }
-
-        fn read_map_elt_key<T, F>(&mut self, _idx: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut AnimalDecoder) -> Result<T, Error>,
-        {
-            Err(Error::Syntax)
-        }
-
-        fn read_map_elt_val<T, F>(&mut self, _idx: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut AnimalDecoder) -> Result<T, Error>,
-        {
-            Err(Error::Syntax)
-        }
-    }
-}
-
-//////////////////////////////////////////////////////////////////////////////
-
-mod deserializer {
-    use super::{Animal, Error};
-
-    use serde::de;
-
-    #[derive(Debug)]
-    enum State {
-        Animal(Animal),
-        Isize(isize),
-        Str(&'static str),
-        String(String),
-        UnitState,
-    }
-
-    pub struct AnimalDeserializer {
-        stack: Vec<State>,
-    }
-
-    impl AnimalDeserializer {
-        #[inline]
-        pub fn new(animal: Animal) -> AnimalDeserializer {
-            AnimalDeserializer {
-                stack: vec!(State::Animal(animal)),
-            }
-        }
-    }
-
-    impl de::Deserializer for AnimalDeserializer {
-        type Error = Error;
-
-        #[inline]
-        fn deserialize<V>(&mut self, mut visitor: V) -> Result<V::Value, Error>
-            where V: de::Visitor,
-        {
-            match self.stack.pop() {
-                Some(State::Isize(value)) => {
-                    visitor.visit_isize(value)
-                }
-                Some(State::String(value)) => {
-                    visitor.visit_string(value)
-                }
-                Some(State::Str(value)) => {
-                    visitor.visit_str(value)
-                }
-                Some(State::UnitState) => {
-                    visitor.visit_unit()
-                }
-                Some(_) => {
-                    Err(Error::Syntax)
-                }
-                None => {
-                    Err(Error::EndOfStream)
-                }
-            }
-        }
-
-        #[inline]
-        fn deserialize_enum<V>(&mut self,
-                         _name: &str,
-                         _variants: &[&str],
-                         mut visitor: V) -> Result<V::Value, Error>
-            where V: de::EnumVisitor,
-        {
-            match self.stack.pop() {
-                Some(State::Animal(Animal::Dog)) => {
-                    self.stack.push(State::UnitState);
-                    self.stack.push(State::Str("Dog"));
-                    visitor.visit(DogVisitor {
-                        de: self,
-                    })
-                }
-                Some(State::Animal(Animal::Frog(x0, x1))) => {
-                    self.stack.push(State::Isize(x1));
-                    self.stack.push(State::String(x0));
-                    self.stack.push(State::Str("Frog"));
-                    visitor.visit(FrogVisitor {
-                        de: self,
-                        state: 0,
-                    })
-                }
-                Some(_) => {
-                    Err(Error::Syntax)
-                }
-                None => {
-                    Err(Error::EndOfStream)
-                }
-            }
-        }
-    }
-
-    struct DogVisitor<'a> {
-        de: &'a mut AnimalDeserializer,
-    }
-
-    impl<'a> de::VariantVisitor for DogVisitor<'a> {
-        type Error = Error;
-
-        fn visit_variant<V>(&mut self) -> Result<V, Error>
-            where V: de::Deserialize
-        {
-            de::Deserialize::deserialize(self.de)
-        }
-
-        fn visit_unit(&mut self) -> Result<(), Error> {
-            de::Deserialize::deserialize(self.de)
-        }
-    }
-
-    struct FrogVisitor<'a> {
-        de: &'a mut AnimalDeserializer,
-        state: usize,
-    }
-
-    impl<'a> de::VariantVisitor for FrogVisitor<'a> {
-        type Error = Error;
-
-        fn visit_variant<V>(&mut self) -> Result<V, Error>
-            where V: de::Deserialize
-        {
-            de::Deserialize::deserialize(self.de)
-        }
-
-        fn visit_tuple<V>(&mut self,
-                          _len: usize,
-                          mut visitor: V) -> Result<V::Value, Error>
-            where V: de::Visitor,
-        {
-            visitor.visit_seq(self)
-        }
-    }
-
-    impl<'a> de::SeqVisitor for FrogVisitor<'a> {
-        type Error = Error;
-
-        fn visit<T>(&mut self) -> Result<Option<T>, Error>
-            where T: de::Deserialize,
-        {
-            match self.state {
-                0 => {
-                    self.state += 1;
-                    Ok(Some(try!(de::Deserialize::deserialize(self.de))))
-                }
-                1 => {
-                    self.state += 1;
-                    Ok(Some(try!(de::Deserialize::deserialize(self.de))))
-                }
-                _ => {
-                    Ok(None)
-                }
-            }
-        }
-
-        fn end(&mut self) -> Result<(), Error> {
-            if self.state == 2 {
-                Ok(())
-            } else {
-                Err(Error::Syntax)
-            }
-        }
-
-        fn size_hint(&self) -> (usize, Option<usize>) {
-            let len = 2 - self.state;
-            (len, Some(len))
-        }
-    }
-}
-
-//////////////////////////////////////////////////////////////////////////////
-
-#[bench]
-fn bench_decoder_dog(b: &mut Bencher) {
-    b.iter(|| {
-        let animal = Animal::Dog;
-
-        let mut d = decoder::AnimalDecoder::new(animal.clone());
-        let value: Animal = Decodable::decode(&mut d).unwrap();
-
-        assert_eq!(value, animal);
-    })
-}
-
-#[bench]
-fn bench_decoder_frog(b: &mut Bencher) {
-    b.iter(|| {
-        let animal = Animal::Frog("Henry".to_owned(), 349);
-
-        let mut d = decoder::AnimalDecoder::new(animal.clone());
-        let value: Animal = Decodable::decode(&mut d).unwrap();
-
-        assert_eq!(value, animal);
-    })
-}
-
-#[bench]
-fn bench_deserializer_dog(b: &mut Bencher) {
-    b.iter(|| {
-        let animal = Animal::Dog;
-
-        let mut d = deserializer::AnimalDeserializer::new(animal.clone());
-        let value: Animal = Deserialize::deserialize(&mut d).unwrap();
-
-        assert_eq!(value, animal);
-    })
-}
-
-#[bench]
-fn bench_deserializer_frog(b: &mut Bencher) {
-    b.iter(|| {
-        let animal = Animal::Frog("Henry".to_owned(), 349);
-
-        let mut d = deserializer::AnimalDeserializer::new(animal.clone());
-        let value: Animal = Deserialize::deserialize(&mut d).unwrap();
-
-        assert_eq!(value, animal);
-    })
-}

testing/benches/bench_map.rs

@@ -1,474 +0,0 @@
-use std::fmt::Debug;
-use std::fmt;
-use std::error;
-use std::collections::HashMap;
-use test::Bencher;
-
-use rustc_serialize::{Decoder, Decodable};
-
-use serde;
-use serde::de::{Deserializer, Deserialize};
-
-//////////////////////////////////////////////////////////////////////////////
-
-#[derive(PartialEq, Debug)]
-pub enum Error {
-    EndOfStream,
-    Syntax,
-    MissingField,
-}
-
-impl serde::de::Error for Error {
-    fn custom<T: Into<String>>(_: T) -> Error { Error::Syntax }
-
-    fn end_of_stream() -> Error { Error::EndOfStream }
-
-    fn unknown_field(_: &str) -> Error { Error::Syntax }
-
-    fn missing_field(_: &'static str) -> Error {
-        Error::MissingField
-    }
-}
-
-impl fmt::Display for Error {
-    fn fmt(&self, formatter: &mut fmt::Formatter) -> Result<(), fmt::Error> {
-        formatter.write_str(format!("{:?}", self).as_ref())
-    }
-}
-
-impl error::Error for Error {
-    fn description(&self) -> &str {
-        "Serde Deserialization Error"
-    }
-
-    fn cause(&self) -> Option<&error::Error> {
-        None
-    }
-}
-//////////////////////////////////////////////////////////////////////////////
-
-mod decoder {
-    use std::collections::HashMap;
-    use std::collections::hash_map::IntoIter;
-    use rustc_serialize;
-
-    use super::Error;
-
-    enum Value {
-        String(String),
-        Isize(isize),
-    }
-
-    pub struct IsizeDecoder {
-        len: usize,
-        iter: IntoIter<String, isize>,
-        stack: Vec<Value>,
-    }
-
-    impl IsizeDecoder {
-        #[inline]
-        pub fn new(values: HashMap<String, isize>) -> IsizeDecoder {
-            IsizeDecoder {
-                len: values.len(),
-                iter: values.into_iter(),
-                stack: vec!(),
-            }
-        }
-    }
-
-    impl rustc_serialize::Decoder for IsizeDecoder {
-        type Error = Error;
-
-        fn error(&mut self, _msg: &str) -> Error {
-            Error::Syntax
-        }
-
-        // Primitive types:
-        fn read_nil(&mut self) -> Result<(), Error> { Err(Error::Syntax) }
-        fn read_usize(&mut self) -> Result<usize, Error> { Err(Error::Syntax) }
-        fn read_u64(&mut self) -> Result<u64, Error> { Err(Error::Syntax) }
-        fn read_u32(&mut self) -> Result<u32, Error> { Err(Error::Syntax) }
-        fn read_u16(&mut self) -> Result<u16, Error> { Err(Error::Syntax) }
-        fn read_u8(&mut self) -> Result<u8, Error> { Err(Error::Syntax) }
-        #[inline]
-        fn read_isize(&mut self) -> Result<isize, Error> {
-            match self.stack.pop() {
-                Some(Value::Isize(x)) => Ok(x),
-                Some(_) => Err(Error::Syntax),
-                None => Err(Error::EndOfStream),
-            }
-        }
-        fn read_i64(&mut self) -> Result<i64, Error> { Err(Error::Syntax) }
-        fn read_i32(&mut self) -> Result<i32, Error> { Err(Error::Syntax) }
-        fn read_i16(&mut self) -> Result<i16, Error> { Err(Error::Syntax) }
-        fn read_i8(&mut self) -> Result<i8, Error> { Err(Error::Syntax) }
-        fn read_bool(&mut self) -> Result<bool, Error> { Err(Error::Syntax) }
-        fn read_f64(&mut self) -> Result<f64, Error> { Err(Error::Syntax) }
-        fn read_f32(&mut self) -> Result<f32, Error> { Err(Error::Syntax) }
-        fn read_char(&mut self) -> Result<char, Error> { Err(Error::Syntax) }
-        #[inline]
-        fn read_str(&mut self) -> Result<String, Error> {
-            match self.stack.pop() {
-                Some(Value::String(x)) => Ok(x),
-                Some(_) => Err(Error::Syntax),
-                None => Err(Error::EndOfStream),
-            }
-        }
-
-        // Compound types:
-        fn read_enum<T, F>(&mut self, _name: &str, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut IsizeDecoder) -> Result<T, Error>,
-        {
-            Err(Error::Syntax)
-        }
-
-        fn read_enum_variant<T, F>(&mut self, _names: &[&str], _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut IsizeDecoder, usize) -> Result<T, Error>,
-        {
-            Err(Error::Syntax)
-        }
-
-        fn read_enum_variant_arg<T, F>(&mut self, _a_idx: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut IsizeDecoder) -> Result<T, Error>,
-        {
-            Err(Error::Syntax)
-        }
-
-        fn read_enum_struct_variant<T, F>(&mut self, _names: &[&str], _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut IsizeDecoder, usize) -> Result<T, Error>,
-        {
-            Err(Error::Syntax)
-        }
-
-        fn read_enum_struct_variant_field<T, F>(&mut self, _f_name: &str, _f_idx: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut IsizeDecoder) -> Result<T, Error>,
-        {
-            Err(Error::Syntax)
-        }
-
-        fn read_struct<T, F>(&mut self, _s_name: &str, _len: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut IsizeDecoder) -> Result<T, Error>,
-        {
-            Err(Error::Syntax)
-        }
-
-        fn read_struct_field<T, F>(&mut self, _f_name: &str, _f_idx: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut IsizeDecoder) -> Result<T, Error>,
-        {
-            Err(Error::Syntax)
-        }
-
-        fn read_tuple<T, F>(&mut self, _len: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut IsizeDecoder) -> Result<T, Error>,
-        {
-            Err(Error::Syntax)
-        }
-
-        fn read_tuple_arg<T, F>(&mut self, _a_idx: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut IsizeDecoder) -> Result<T, Error>,
-        {
-            Err(Error::Syntax)
-        }
-
-        fn read_tuple_struct<T, F>(&mut self, _s_name: &str, _len: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut IsizeDecoder) -> Result<T, Error>,
-        {
-            Err(Error::Syntax)
-        }
-
-        fn read_tuple_struct_arg<T, F>(&mut self, _a_idx: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut IsizeDecoder) -> Result<T, Error>,
-        {
-            Err(Error::Syntax)
-        }
-
-        // Specialized types:
-        fn read_option<T, F>(&mut self, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut IsizeDecoder, bool) -> Result<T, Error>,
-        {
-            Err(Error::Syntax)
-        }
-
-        fn read_seq<T, F>(&mut self, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut IsizeDecoder, usize) -> Result<T, Error>,
-        {
-            Err(Error::Syntax)
-        }
-
-        fn read_seq_elt<T, F>(&mut self, _idx: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut IsizeDecoder) -> Result<T, Error>,
-        {
-            Err(Error::Syntax)
-        }
-
-        #[inline]
-        fn read_map<T, F>(&mut self, f: F) -> Result<T, Error> where
-            F: FnOnce(&mut IsizeDecoder, usize) -> Result<T, Error>,
-        {
-            let len = self.len;
-            f(self, len)
-        }
-        #[inline]
-        fn read_map_elt_key<T, F>(&mut self, _idx: usize, f: F) -> Result<T, Error> where
-            F: FnOnce(&mut IsizeDecoder) -> Result<T, Error>,
-        {
-            match self.iter.next() {
-                Some((key, value)) => {
-                    self.stack.push(Value::Isize(value));
-                    self.stack.push(Value::String(key));
-                    f(self)
-                }
-                None => {
-                    Err(Error::Syntax)
-                }
-            }
-        }
-
-        #[inline]
-        fn read_map_elt_val<T, F>(&mut self, _idx: usize, f: F) -> Result<T, Error> where
-            F: FnOnce(&mut IsizeDecoder) -> Result<T, Error>,
-        {
-            f(self)
-        }
-    }
-}
-
-//////////////////////////////////////////////////////////////////////////////
-
-mod deserializer {
-    use std::collections::HashMap;
-    use std::collections::hash_map;
-
-    use super::Error;
-
-    use serde::de;
-
-    #[derive(PartialEq, Debug)]
-    enum State {
-        StartState,
-        Key(String),
-        Value(isize),
-    }
-
-    pub struct IsizeDeserializer {
-        stack: Vec<State>,
-        iter: hash_map::IntoIter<String, isize>,
-    }
-
-    impl IsizeDeserializer {
-        #[inline]
-        pub fn new(values: HashMap<String, isize>) -> IsizeDeserializer {
-            IsizeDeserializer {
-                stack: vec!(State::StartState),
-                iter: values.into_iter(),
-            }
-        }
-    }
-
-    impl de::Deserializer for IsizeDeserializer {
-        type Error = Error;
-
-        fn deserialize<V>(&mut self, mut visitor: V) -> Result<V::Value, Error>
-            where V: de::Visitor,
-        {
-            match self.stack.pop() {
-                Some(State::StartState) => {
-                    visitor.visit_map(self)
-                }
-                Some(State::Key(key)) => {
-                    visitor.visit_string(key)
-                }
-                Some(State::Value(value)) => {
-                    visitor.visit_isize(value)
-                }
-                None => {
-                    Err(Error::EndOfStream)
-                }
-            }
-        }
-    }
-
-    impl de::MapVisitor for IsizeDeserializer {
-        type Error = Error;
-
-        fn visit_key<K>(&mut self) -> Result<Option<K>, Error>
-            where K: de::Deserialize,
-        {
-            match self.iter.next() {
-                Some((key, value)) => {
-                    self.stack.push(State::Value(value));
-                    self.stack.push(State::Key(key));
-                    Ok(Some(try!(de::Deserialize::deserialize(self))))
-                }
-                None => {
-                    Ok(None)
-                }
-            }
-        }
-
-        fn visit_value<V>(&mut self) -> Result<V, Error>
-            where V: de::Deserialize,
-        {
-            de::Deserialize::deserialize(self)
-        }
-
-        fn end(&mut self) -> Result<(), Error> {
-            match self.iter.next() {
-                Some(_) => Err(Error::Syntax),
-                None => Ok(()),
-            }
-        }
-
-        fn size_hint(&self) -> (usize, Option<usize>) {
-            self.iter.size_hint()
-        }
-    }
-
-/*
-    impl Iterator for IsizeDeserializer {
-        type Item = Result<de::Token, Error>;
-
-        #[inline]
-        fn next(&mut self) -> Option<Result<de::Token, Error>> {
-            match self.stack.pop() {
-                Some(State::StartState) => {
-                    self.stack.push(KeyOrEndState);
-                    Some(Ok(de::Token::MapStart(self.len)))
-                }
-                Some(State::KeyOrEndState) => {
-                    match self.iter.next() {
-                        Some((key, value)) => {
-                            self.stack.push(Value(value));
-                            Some(Ok(de::Token::String(key)))
-                        }
-                        None => {
-                            self.stack.push(EndState);
-                            Some(Ok(de::Token::End))
-                        }
-                    }
-                }
-                Some(State::Value(x)) => {
-                    self.stack.push(KeyOrEndState);
-                    Some(Ok(de::Token::Isize(x)))
-                }
-                Some(EndState) => {
-                    None
-                }
-                None => {
-                    None
-                }
-            }
-        }
-    }
-
-    impl de::Deserializer<Error> for IsizeDeserializer {
-        #[inline]
-        fn end_of_stream(&mut self) -> Error {
-            EndOfStream
-        }
-
-        #[inline]
-        fn syntax(&mut self, _token: de::Token, _expected: &[de::TokenKind]) -> Error {
-            Syntax
-        }
-
-        #[inline]
-        fn unexpected_name(&mut self, _token: de::Token) -> Error {
-            Syntax
-        }
-
-        #[inline]
-        fn conversion_error(&mut self, _token: de::Token) -> Error {
-            Syntax
-        }
-
-        #[inline]
-        fn missing_field<
-            T: de::Deserialize<IsizeDeserializer, Error>
-        >(&mut self, _field: &'static str) -> Result<T, Error> {
-            Err(Error::Syntax)
-        }
-    }
-*/
-}
-
-//////////////////////////////////////////////////////////////////////////////
-
-fn run_decoder<
-    D: Decoder<Error=Error>,
-    T: Clone + PartialEq + Debug + Decodable
->(mut d: D, value: T) {
-    let v = Decodable::decode(&mut d);
-
-    assert_eq!(Ok(value), v);
-}
-
-#[bench]
-fn bench_decoder_000(b: &mut Bencher) {
-    b.iter(|| {
-        let m: HashMap<String, isize> = HashMap::new();
-        run_decoder(decoder::IsizeDecoder::new(m.clone()), m)
-    })
-}
-
-#[bench]
-fn bench_decoder_003(b: &mut Bencher) {
-    b.iter(|| {
-        let mut m: HashMap<String, isize> = HashMap::new();
-        for i in 0 .. 3 {
-            m.insert(i.to_string(), i);
-        }
-        run_decoder(decoder::IsizeDecoder::new(m.clone()), m)
-    })
-}
-
-#[bench]
-fn bench_decoder_100(b: &mut Bencher) {
-    b.iter(|| {
-        let mut m: HashMap<String, isize> = HashMap::new();
-        for i in 0 .. 100 {
-            m.insert(i.to_string(), i);
-        }
-        run_decoder(decoder::IsizeDecoder::new(m.clone()), m)
-    })
-}
-
-fn run_deserializer<D, T>(mut d: D, value: T)
-    where D: Deserializer,
-          D::Error: Debug + PartialEq,
-          T: Clone + PartialEq + Debug + Deserialize
-{
-    let v = T::deserialize(&mut d);
-
-    assert_eq!(Ok(value), v);
-}
-
-#[bench]
-fn bench_deserializer_000(b: &mut Bencher) {
-    b.iter(|| {
-        let m: HashMap<String, isize> = HashMap::new();
-        run_deserializer(deserializer::IsizeDeserializer::new(m.clone()), m)
-    })
-}
-
-#[bench]
-fn bench_deserializer_003(b: &mut Bencher) {
-    b.iter(|| {
-        let mut m: HashMap<String, isize> = HashMap::new();
-        for i in 0 .. 3 {
-            m.insert(i.to_string(), i);
-        }
-        run_deserializer(deserializer::IsizeDeserializer::new(m.clone()), m)
-    })
-}
-
-#[bench]
-fn bench_deserializer_100(b: &mut Bencher) {
-    b.iter(|| {
-        let mut m: HashMap<String, isize> = HashMap::new();
-        for i in 0 .. 100 {
-            m.insert(i.to_string(), i);
-        }
-        run_deserializer(deserializer::IsizeDeserializer::new(m.clone()), m)
-    })
-}

testing/benches/bench_struct.rs

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

testing/benches/bench_vec.rs

@@ -1,628 +0,0 @@
-use std::fmt::Debug;
-use std::fmt;
-use std::error;
-use test::Bencher;
-
-use rustc_serialize::{Decoder, Decodable};
-
-use serde;
-use serde::de::{Deserializer, Deserialize};
-
-//////////////////////////////////////////////////////////////////////////////
-
-#[derive(PartialEq, Debug)]
-pub enum Error {
-    EndOfStream,
-    Syntax,
-}
-
-impl serde::de::Error for Error {
-    fn custom<T: Into<String>>(_: T) -> Error { Error::Syntax }
-
-    fn end_of_stream() -> Error { Error::EndOfStream }
-
-    fn unknown_field(_: &str) -> Error { Error::Syntax }
-
-    fn missing_field(_: &'static str) -> Error { Error::Syntax }
-}
-
-impl fmt::Display for Error {
-    fn fmt(&self, formatter: &mut fmt::Formatter) -> Result<(), fmt::Error> {
-        formatter.write_str(format!("{:?}", self).as_ref())
-    }
-}
-
-impl error::Error for Error {
-    fn description(&self) -> &str {
-        "Serde Deserialization Error"
-    }
-
-    fn cause(&self) -> Option<&error::Error> {
-        None
-    }
-}
-//////////////////////////////////////////////////////////////////////////////
-
-mod decoder {
-    use std::vec;
-    use rustc_serialize;
-
-    use super::Error;
-
-    pub struct UsizeDecoder {
-        len: usize,
-        iter: vec::IntoIter<usize>,
-    }
-
-    impl UsizeDecoder {
-        #[inline]
-        pub fn new(values: Vec<usize>) -> UsizeDecoder {
-            UsizeDecoder {
-                len: values.len(),
-                iter: values.into_iter(),
-            }
-        }
-    }
-
-    impl rustc_serialize::Decoder for UsizeDecoder {
-        type Error = Error;
-
-        fn error(&mut self, _: &str) -> Error { Error::Syntax }
-
-        // Primitive types:
-        fn read_nil(&mut self) -> Result<(), Error> { Err(Error::Syntax) }
-        #[inline]
-        fn read_usize(&mut self) -> Result<usize, Error> {
-            match self.iter.next() {
-                Some(value) => Ok(value),
-                None => Err(Error::EndOfStream),
-            }
-        }
-        fn read_u64(&mut self) -> Result<u64, Error> { Err(Error::Syntax) }
-        fn read_u32(&mut self) -> Result<u32, Error> { Err(Error::Syntax) }
-        fn read_u16(&mut self) -> Result<u16, Error> { Err(Error::Syntax) }
-        fn read_u8(&mut self) -> Result<u8, Error> { Err(Error::Syntax) }
-        fn read_isize(&mut self) -> Result<isize, Error> { Err(Error::Syntax) }
-        fn read_i64(&mut self) -> Result<i64, Error> { Err(Error::Syntax) }
-        fn read_i32(&mut self) -> Result<i32, Error> { Err(Error::Syntax) }
-        fn read_i16(&mut self) -> Result<i16, Error> { Err(Error::Syntax) }
-        fn read_i8(&mut self) -> Result<i8, Error> { Err(Error::Syntax) }
-        fn read_bool(&mut self) -> Result<bool, Error> { Err(Error::Syntax) }
-        fn read_f64(&mut self) -> Result<f64, Error> { Err(Error::Syntax) }
-        fn read_f32(&mut self) -> Result<f32, Error> { Err(Error::Syntax) }
-        fn read_char(&mut self) -> Result<char, Error> { Err(Error::Syntax) }
-        fn read_str(&mut self) -> Result<String, Error> { Err(Error::Syntax) }
-
-        // Compound types:
-        fn read_enum<T, F>(&mut self, _name: &str, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut UsizeDecoder) -> Result<T, Error>,
-        {
-            Err(Error::Syntax)
-        }
-
-        fn read_enum_variant<T, F>(&mut self, _names: &[&str], _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut UsizeDecoder, usize) -> Result<T, Error>,
-        {
-            Err(Error::Syntax)
-        }
-
-        fn read_enum_variant_arg<T, F>(&mut self, _a_idx: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut UsizeDecoder) -> Result<T, Error>,
-        {
-            Err(Error::Syntax)
-        }
-
-        fn read_enum_struct_variant<T, F>(&mut self, _names: &[&str], _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut UsizeDecoder, usize) -> Result<T, Error>,
-        {
-            Err(Error::Syntax)
-        }
-
-        fn read_enum_struct_variant_field<T, F>(&mut self, _f_name: &str, _f_idx: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut UsizeDecoder) -> Result<T, Error>,
-        {
-            Err(Error::Syntax)
-        }
-
-        fn read_struct<T, F>(&mut self, _s_name: &str, _len: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut UsizeDecoder) -> Result<T, Error>,
-        {
-            Err(Error::Syntax)
-        }
-
-        fn read_struct_field<T, F>(&mut self, _f_name: &str, _f_idx: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut UsizeDecoder) -> Result<T, Error>,
-        {
-            Err(Error::Syntax)
-        }
-
-        fn read_tuple<T, F>(&mut self, _len: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut UsizeDecoder) -> Result<T, Error>,
-        {
-            Err(Error::Syntax)
-        }
-
-        fn read_tuple_arg<T, F>(&mut self, _a_idx: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut UsizeDecoder) -> Result<T, Error>,
-        {
-            Err(Error::Syntax)
-        }
-
-        fn read_tuple_struct<T, F>(&mut self, _s_name: &str, _len: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut UsizeDecoder) -> Result<T, Error>,
-        {
-            Err(Error::Syntax)
-        }
-
-        fn read_tuple_struct_arg<T, F>(&mut self, _a_idx: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut UsizeDecoder) -> Result<T, Error>,
-        {
-            Err(Error::Syntax)
-        }
-
-        // Specialized types:
-        fn read_option<T, F>(&mut self, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut UsizeDecoder, bool) -> Result<T, Error>,
-        {
-            Err(Error::Syntax)
-        }
-
-        #[inline]
-        fn read_seq<T, F>(&mut self, f: F) -> Result<T, Error> where
-            F: FnOnce(&mut UsizeDecoder, usize) -> Result<T, Error>,
-        {
-            let len = self.len;
-            f(self, len)
-        }
-        #[inline]
-        fn read_seq_elt<T, F>(&mut self, _idx: usize, f: F) -> Result<T, Error> where
-            F: FnOnce(&mut UsizeDecoder) -> Result<T, Error>,
-        {
-            f(self)
-        }
-
-        fn read_map<T, F>(&mut self, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut UsizeDecoder, usize) -> Result<T, Error>,
-        {
-            Err(Error::Syntax)
-        }
-
-        fn read_map_elt_key<T, F>(&mut self, _idx: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut UsizeDecoder) -> Result<T, Error>,
-        {
-            Err(Error::Syntax)
-        }
-
-        fn read_map_elt_val<T, F>(&mut self, _idx: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut UsizeDecoder) -> Result<T, Error>,
-        {
-            Err(Error::Syntax)
-        }
-    }
-
-
-    pub struct U8Decoder {
-        len: usize,
-        iter: vec::IntoIter<u8>,
-    }
-
-    impl U8Decoder {
-        #[inline]
-        pub fn new(values: Vec<u8>) -> U8Decoder {
-            U8Decoder {
-                len: values.len(),
-                iter: values.into_iter(),
-            }
-        }
-    }
-
-    impl rustc_serialize::Decoder for U8Decoder {
-        type Error = Error;
-
-        fn error(&mut self, _: &str) -> Error { Error::Syntax }
-
-        // Primitive types:
-        fn read_nil(&mut self) -> Result<(), Error> { Err(Error::Syntax) }
-        fn read_usize(&mut self) -> Result<usize, Error> { Err(Error::Syntax) }
-        fn read_u64(&mut self) -> Result<u64, Error> { Err(Error::Syntax) }
-        fn read_u32(&mut self) -> Result<u32, Error> { Err(Error::Syntax) }
-        fn read_u16(&mut self) -> Result<u16, Error> { Err(Error::Syntax) }
-        #[inline]
-        fn read_u8(&mut self) -> Result<u8, Error> {
-            match self.iter.next() {
-                Some(value) => Ok(value),
-                None => Err(Error::EndOfStream),
-            }
-        }
-        #[inline]
-        fn read_isize(&mut self) -> Result<isize, Error> { Err(Error::Syntax) }
-        fn read_i64(&mut self) -> Result<i64, Error> { Err(Error::Syntax) }
-        fn read_i32(&mut self) -> Result<i32, Error> { Err(Error::Syntax) }
-        fn read_i16(&mut self) -> Result<i16, Error> { Err(Error::Syntax) }
-        fn read_i8(&mut self) -> Result<i8, Error> { Err(Error::Syntax) }
-        fn read_bool(&mut self) -> Result<bool, Error> { Err(Error::Syntax) }
-        fn read_f64(&mut self) -> Result<f64, Error> { Err(Error::Syntax) }
-        fn read_f32(&mut self) -> Result<f32, Error> { Err(Error::Syntax) }
-        fn read_char(&mut self) -> Result<char, Error> { Err(Error::Syntax) }
-        fn read_str(&mut self) -> Result<String, Error> { Err(Error::Syntax) }
-
-        // Compound types:
-        fn read_enum<T, F>(&mut self, _name: &str, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut U8Decoder) -> Result<T, Error>,
-        {
-            Err(Error::Syntax)
-        }
-
-        fn read_enum_variant<T, F>(&mut self, _names: &[&str], _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut U8Decoder, usize) -> Result<T, Error>,
-        {
-            Err(Error::Syntax)
-        }
-
-        fn read_enum_variant_arg<T, F>(&mut self, _a_idx: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut U8Decoder) -> Result<T, Error>,
-        {
-            Err(Error::Syntax)
-        }
-
-        fn read_enum_struct_variant<T, F>(&mut self, _names: &[&str], _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut U8Decoder, usize) -> Result<T, Error>,
-        {
-            Err(Error::Syntax)
-        }
-
-        fn read_enum_struct_variant_field<T, F>(&mut self, _f_name: &str, _f_idx: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut U8Decoder) -> Result<T, Error>,
-        {
-            Err(Error::Syntax)
-        }
-
-        fn read_struct<T, F>(&mut self, _s_name: &str, _len: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut U8Decoder) -> Result<T, Error>,
-        {
-            Err(Error::Syntax)
-        }
-
-        fn read_struct_field<T, F>(&mut self, _f_name: &str, _f_idx: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut U8Decoder) -> Result<T, Error>,
-        {
-            Err(Error::Syntax)
-        }
-
-        fn read_tuple<T, F>(&mut self, _len: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut U8Decoder) -> Result<T, Error>,
-        {
-            Err(Error::Syntax)
-        }
-
-        fn read_tuple_arg<T, F>(&mut self, _a_idx: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut U8Decoder) -> Result<T, Error>,
-        {
-            Err(Error::Syntax)
-        }
-
-        fn read_tuple_struct<T, F>(&mut self, _s_name: &str, _len: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut U8Decoder) -> Result<T, Error>,
-        {
-            Err(Error::Syntax)
-        }
-
-        fn read_tuple_struct_arg<T, F>(&mut self, _a_idx: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut U8Decoder) -> Result<T, Error>,
-        {
-            Err(Error::Syntax)
-        }
-
-        // Specialized types:
-        fn read_option<T, F>(&mut self, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut U8Decoder, bool) -> Result<T, Error>,
-        {
-            Err(Error::Syntax)
-        }
-
-        #[inline]
-        fn read_seq<T, F>(&mut self, f: F) -> Result<T, Error> where
-            F: FnOnce(&mut U8Decoder, usize) -> Result<T, Error>,
-        {
-            let len = self.len;
-            f(self, len)
-        }
-        #[inline]
-        fn read_seq_elt<T, F>(&mut self, _idx: usize, f: F) -> Result<T, Error> where
-            F: FnOnce(&mut U8Decoder) -> Result<T, Error>,
-        {
-            f(self)
-        }
-
-        fn read_map<T, F>(&mut self, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut U8Decoder, usize) -> Result<T, Error>,
-        {
-            Err(Error::Syntax)
-        }
-
-        fn read_map_elt_key<T, F>(&mut self, _idx: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut U8Decoder) -> Result<T, Error>,
-        {
-            Err(Error::Syntax)
-        }
-
-        fn read_map_elt_val<T, F>(&mut self, _idx: usize, _f: F) -> Result<T, Error> where
-            F: FnOnce(&mut U8Decoder) -> Result<T, Error>,
-        {
-            Err(Error::Syntax)
-        }
-    }
-}
-
-//////////////////////////////////////////////////////////////////////////////
-
-mod deserializer {
-    //use std::num;
-    use std::vec;
-
-    use super::Error;
-
-    use serde::de;
-
-    #[derive(PartialEq, Debug)]
-    enum State {
-        Start,
-        SepOrEnd,
-        End,
-    }
-
-    pub struct Deserializer<A> {
-        state: State,
-        iter: vec::IntoIter<A>,
-        len: usize,
-        value: Option<A>,
-    }
-
-    impl<A> Deserializer<A> {
-        #[inline]
-        pub fn new(values: Vec<A>) -> Deserializer<A> {
-            let len = values.len();
-            Deserializer {
-                state: State::Start,
-                iter: values.into_iter(),
-                len: len,
-                value: None,
-            }
-        }
-    }
-
-    impl de::Deserializer for Deserializer<usize> {
-        type Error = Error;
-
-        #[inline]
-        fn deserialize<V>(&mut self, mut visitor: V) -> Result<V::Value, Error>
-            where V: de::Visitor,
-        {
-            match self.state {
-                State::Start => {
-                    self.state = State::SepOrEnd;
-                    visitor.visit_seq(self)
-                }
-                State::SepOrEnd => {
-                    visitor.visit_usize(self.value.take().unwrap())
-                }
-                State::End => {
-                    Err(Error::EndOfStream)
-                }
-            }
-        }
-    }
-
-    impl de::SeqVisitor for Deserializer<usize> {
-        type Error = Error;
-
-        #[inline]
-        fn visit<T>(&mut self) -> Result<Option<T>, Error>
-            where T: de::Deserialize,
-        {
-            match self.iter.next() {
-                Some(value) => {
-                    self.len -= 1;
-                    self.value = Some(value);
-                    Ok(Some(try!(de::Deserialize::deserialize(self))))
-                }
-                None => {
-                    self.state = State::End;
-                    Ok(None)
-                }
-            }
-        }
-
-        #[inline]
-        fn end(&mut self) -> Result<(), Error> {
-            match self.iter.next() {
-                Some(_) => Err(Error::Syntax),
-                None => {
-                    self.state = State::End;
-                    Ok(())
-                }
-            }
-        }
-
-        #[inline]
-        fn size_hint(&self) -> (usize, Option<usize>) {
-            (self.len, Some(self.len))
-        }
-    }
-
-    impl de::Deserializer for Deserializer<u8> {
-        type Error = Error;
-
-        #[inline]
-        fn deserialize<V>(&mut self, mut visitor: V) -> Result<V::Value, Error>
-            where V: de::Visitor,
-        {
-            match self.state {
-                State::Start => {
-                    self.state = State::SepOrEnd;
-                    visitor.visit_seq(self)
-                }
-                State::SepOrEnd => {
-                    visitor.visit_u8(self.value.take().unwrap())
-                }
-                State::End => {
-                    Err(Error::EndOfStream)
-                }
-            }
-        }
-    }
-
-    impl de::SeqVisitor for Deserializer<u8> {
-        type Error = Error;
-
-        #[inline]
-        fn visit<T>(&mut self) -> Result<Option<T>, Error>
-            where T: de::Deserialize,
-        {
-            match self.iter.next() {
-                Some(value) => {
-                    self.len -= 1;
-                    self.value = Some(value);
-                    Ok(Some(try!(de::Deserialize::deserialize(self))))
-                }
-                None => {
-                    self.state = State::End;
-                    Ok(None)
-                }
-            }
-        }
-
-        #[inline]
-        fn end(&mut self) -> Result<(), Error> {
-            match self.iter.next() {
-                Some(_) => Err(Error::Syntax),
-                None => {
-                    self.state = State::End;
-                    Ok(())
-                }
-            }
-        }
-
-        #[inline]
-        fn size_hint(&self) -> (usize, Option<usize>) {
-            (self.len, Some(self.len))
-        }
-    }
-}
-
-//////////////////////////////////////////////////////////////////////////////
-
-fn run_decoder<
-    D: Decoder<Error=Error>,
-    T: Clone + PartialEq + Debug + Decodable
->(mut d: D, value: T) {
-    let v = Decodable::decode(&mut d);
-
-    assert_eq!(Ok(value), v);
-}
-
-fn run_deserializer<D, T>(mut d: D, value: T)
-    where D: Deserializer,
-          D::Error: Debug + PartialEq,
-          T: Clone + PartialEq + Debug + Deserialize
-{
-    let v = T::deserialize(&mut d);
-
-    assert_eq!(Ok(value), v);
-}
-
-#[bench]
-fn bench_decoder_usize_000(b: &mut Bencher) {
-    b.iter(|| {
-        let v: Vec<usize> = vec!();
-        run_decoder(decoder::UsizeDecoder::new(v.clone()), v)
-    })
-}
-
-#[bench]
-fn bench_decoder_usize_003(b: &mut Bencher) {
-    b.iter(|| {
-        let v: Vec<usize> = vec!(1, 2, 3);
-        run_decoder(decoder::UsizeDecoder::new(v.clone()), v)
-    })
-}
-
-#[bench]
-fn bench_decoder_usize_100(b: &mut Bencher) {
-    b.iter(|| {
-        let v: Vec<usize> = (0 .. 100).collect();
-        run_decoder(decoder::UsizeDecoder::new(v.clone()), v)
-    })
-}
-
-#[bench]
-fn bench_decoder_u8_000(b: &mut Bencher) {
-    b.iter(|| {
-        let v: Vec<u8> = vec!();
-        run_decoder(decoder::U8Decoder::new(v.clone()), v)
-    })
-}
-
-#[bench]
-fn bench_decoder_u8_003(b: &mut Bencher) {
-    b.iter(|| {
-        let v: Vec<u8> = vec!(1, 2, 3);
-        run_decoder(decoder::U8Decoder::new(v.clone()), v)
-    })
-}
-
-#[bench]
-fn bench_decoder_u8_100(b: &mut Bencher) {
-    b.iter(|| {
-        let v: Vec<u8> = (0 .. 100).collect();
-        run_decoder(decoder::U8Decoder::new(v.clone()), v)
-    })
-}
-
-#[bench]
-fn bench_deserializer_usize_000(b: &mut Bencher) {
-    b.iter(|| {
-        let v: Vec<usize> = vec!();
-        run_deserializer(deserializer::Deserializer::new(v.clone()), v)
-    })
-}
-
-#[bench]
-fn bench_deserializer_usize_003(b: &mut Bencher) {
-    b.iter(|| {
-        let v: Vec<usize> = vec!(1, 2, 3);
-        run_deserializer(deserializer::Deserializer::new(v.clone()), v)
-    })
-}
-
-#[bench]
-fn bench_deserializer_usize_100(b: &mut Bencher) {
-    b.iter(|| {
-        let v: Vec<usize> = (0 .. 100).collect();
-        run_deserializer(deserializer::Deserializer::new(v.clone()), v)
-    })
-}
-
-#[bench]
-fn bench_deserializer_u8_000(b: &mut Bencher) {
-    b.iter(|| {
-        let v: Vec<u8> = vec!();
-        run_deserializer(deserializer::Deserializer::new(v.clone()), v)
-    })
-}
-
-#[bench]
-fn bench_deserializer_u8_003(b: &mut Bencher) {
-    b.iter(|| {
-        let v: Vec<u8> = vec!(1, 2, 3);
-        run_deserializer(deserializer::Deserializer::new(v.clone()), v)
-    })
-}
-
-#[bench]
-fn bench_deserializer_u8_100(b: &mut Bencher) {
-    b.iter(|| {
-        let v: Vec<u8> = (0 .. 100).collect();
-        run_deserializer(deserializer::Deserializer::new(v.clone()), v)
-    })
-}

testing/build.rs

@@ -5,13 +5,7 @@ use std::path::Path;
 
 fn main() {
     let out_dir = env::var_os("OUT_DIR").unwrap();
-
+    let src = Path::new("tests/test.rs.in");
-    for &(src, dst) in &[
+    let dst = Path::new(&out_dir).join("test.rs");
-        ("tests/test.rs.in", "test.rs"),
+    serde_codegen::expand(&src, &dst).unwrap();
-        ("benches/bench.rs.in", "bench.rs"),
-    ] {
-        let src = Path::new(src);
-        let dst = Path::new(&out_dir).join(dst);
-        serde_codegen::expand(&src, &dst).unwrap();
-    }
 }

testing/tests/test_gen.rs

@@ -9,6 +9,11 @@ use self::serde::de::{Deserialize, Deserializer};
 use std::borrow::Cow;
 use std::marker::PhantomData;
 
+// Try to trip up the generated code if it fails to use fully qualified paths.
+#[allow(dead_code)]
+struct Result;
+use std::result::Result as StdResult;
+
 //////////////////////////////////////////////////////////////////////////
 
 #[test]
@@ -205,32 +210,32 @@ fn assert<T: Serialize + Deserialize>() {}
 fn assert_ser<T: Serialize>() {}
 
 trait SerializeWith {
-    fn serialize_with<S: Serializer>(_: &Self, _: &mut S) -> Result<(), S::Error>;
+    fn serialize_with<S: Serializer>(_: &Self, _: &mut S) -> StdResult<(), S::Error>;
 }
 
 trait DeserializeWith: Sized {
-    fn deserialize_with<D: Deserializer>(_: &mut D) -> Result<Self, D::Error>;
+    fn deserialize_with<D: Deserializer>(_: &mut D) -> StdResult<Self, D::Error>;
 }
 
 // Implements neither Serialize nor Deserialize
 struct X;
 
-fn ser_x<S: Serializer>(_: &X, _: &mut S) -> Result<(), S::Error> {
+fn ser_x<S: Serializer>(_: &X, _: &mut S) -> StdResult<(), S::Error> {
     unimplemented!()
 }
 
-fn de_x<D: Deserializer>(_: &mut D) -> Result<X, D::Error> {
+fn de_x<D: Deserializer>(_: &mut D) -> StdResult<X, D::Error> {
     unimplemented!()
 }
 
 impl SerializeWith for X {
-    fn serialize_with<S: Serializer>(_: &Self, _: &mut S) -> Result<(), S::Error> {
+    fn serialize_with<S: Serializer>(_: &Self, _: &mut S) -> StdResult<(), S::Error> {
         unimplemented!()
     }
 }
 
 impl DeserializeWith for X {
-    fn deserialize_with<D: Deserializer>(_: &mut D) -> Result<Self, D::Error> {
+    fn deserialize_with<D: Deserializer>(_: &mut D) -> StdResult<Self, D::Error> {
         unimplemented!()
     }
 }

testing/tests/test_macros.rs

@@ -600,3 +600,28 @@ fn test_default_ty_param() {
         ]
     );
 }
+
+#[test]
+fn test_enum_state_field() {
+    #[derive(Debug, PartialEq, Serialize, Deserialize)]
+    enum SomeEnum {
+        Key { key: char, state: bool },
+    }
+
+    assert_tokens(
+        &SomeEnum::Key { key: 'a', state: true },
+        &[
+            Token::EnumMapStart("SomeEnum", "Key", 2),
+
+            Token::EnumMapSep,
+            Token::Str("key"),
+            Token::Char('a'),
+
+            Token::EnumMapSep,
+            Token::Str("state"),
+            Token::Bool(true),
+
+            Token::EnumMapEnd,
+        ]
+    );
+}