828 lines
22 KiB
Rust
828 lines
22 KiB
Rust
// Copyright 2012-2014 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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use std::collections::{HashMap, TreeMap};
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use std::hash::Hash;
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//////////////////////////////////////////////////////////////////////////////
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pub trait Serializer<E> {
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fn serialize_null(&mut self) -> Result<(), E>;
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fn serialize_bool(&mut self, v: bool) -> Result<(), E>;
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#[inline]
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fn serialize_int(&mut self, v: int) -> Result<(), E> {
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self.serialize_i64(v as i64)
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}
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#[inline]
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fn serialize_i8(&mut self, v: i8) -> Result<(), E> {
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self.serialize_i64(v as i64)
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}
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#[inline]
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fn serialize_i16(&mut self, v: i16) -> Result<(), E> {
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self.serialize_i64(v as i64)
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}
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#[inline]
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fn serialize_i32(&mut self, v: i32) -> Result<(), E> {
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self.serialize_i64(v as i64)
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}
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#[inline]
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fn serialize_i64(&mut self, v: i64) -> Result<(), E>;
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#[inline]
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fn serialize_uint(&mut self, v: uint) -> Result<(), E> {
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self.serialize_u64(v as u64)
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}
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#[inline]
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fn serialize_u8(&mut self, v: u8) -> Result<(), E> {
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self.serialize_u64(v as u64)
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}
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#[inline]
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fn serialize_u16(&mut self, v: u16) -> Result<(), E> {
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self.serialize_u64(v as u64)
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}
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#[inline]
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fn serialize_u32(&mut self, v: u32) -> Result<(), E> {
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self.serialize_u64(v as u64)
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}
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#[inline]
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fn serialize_u64(&mut self, v: u64) -> Result<(), E>;
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#[inline]
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fn serialize_f32(&mut self, v: f32) -> Result<(), E> {
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self.serialize_f64(v as f64)
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}
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fn serialize_f64(&mut self, v: f64) -> Result<(), E>;
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fn serialize_char(&mut self, v: char) -> Result<(), E>;
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fn serialize_str(&mut self, v: &str) -> Result<(), E>;
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fn serialize_tuple_start(&mut self, len: uint) -> Result<(), E>;
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fn serialize_tuple_sep(&mut self) -> Result<(), E>;
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fn serialize_tuple_end(&mut self) -> Result<(), E>;
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fn serialize_struct_start(&mut self, name: &str, len: uint) -> Result<(), E>;
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fn serialize_struct_sep(&mut self, name: &str) -> Result<(), E>;
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fn serialize_struct_end(&mut self) -> Result<(), E>;
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fn serialize_enum_start(&mut self, name: &str, variant: &str, len: uint) -> Result<(), E>;
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fn serialize_enum_sep(&mut self) -> Result<(), E>;
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fn serialize_enum_end(&mut self) -> Result<(), E>;
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fn serialize_option<T: Serializable>(&mut self, v: &Option<T>) -> Result<(), E>;
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fn serialize_seq<
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T: Serializable,
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Iter: Iterator<T>
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>(&mut self, iter: Iter) -> Result<(), E>;
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fn serialize_map<
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K: Serializable,
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V: Serializable,
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Iter: Iterator<(K, V)>
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>(&mut self, iter: Iter) -> Result<(), E>;
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}
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//////////////////////////////////////////////////////////////////////////////
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pub trait Serializable {
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fn serialize<
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S: Serializer<E>,
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E
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>(&self, s: &mut S) -> Result<(), E>;
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}
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//////////////////////////////////////////////////////////////////////////////
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macro_rules! impl_serializable {
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($ty:ty, $method:ident, $variant:expr) => {
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impl<'a> Serializable for $ty {
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#[inline]
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fn serialize<
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S: Serializer<E>,
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E
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>(&self, s: &mut S) -> Result<(), E> {
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s.$method($variant)
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}
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}
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}
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}
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impl_serializable!(bool, serialize_bool, *self)
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impl_serializable!(int, serialize_int, *self)
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impl_serializable!(i8, serialize_i8, *self)
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impl_serializable!(i16, serialize_i16, *self)
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impl_serializable!(i32, serialize_i32, *self)
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impl_serializable!(i64, serialize_i64, *self)
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impl_serializable!(uint, serialize_uint, *self)
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impl_serializable!(u8, serialize_u8, *self)
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impl_serializable!(u16, serialize_u16, *self)
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impl_serializable!(u32, serialize_u32, *self)
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impl_serializable!(u64, serialize_u64, *self)
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impl_serializable!(f32, serialize_f32, *self)
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impl_serializable!(f64, serialize_f64, *self)
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impl_serializable!(char, serialize_char, *self)
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impl_serializable!(&'a str, serialize_str, *self)
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impl_serializable!(String, serialize_str, self.as_slice())
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impl<
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'a,
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T: Serializable
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> Serializable for &'a T {
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#[inline]
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fn serialize<
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S: Serializer<E>,
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E
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>(&self, s: &mut S) -> Result<(), E> {
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(*self).serialize(s)
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}
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}
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//////////////////////////////////////////////////////////////////////////////
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impl<
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T: Serializable
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> Serializable for Option<T> {
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#[inline]
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fn serialize<
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S: Serializer<E>,
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E
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>(&self, s: &mut S) -> Result<(), E> {
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s.serialize_option(self)
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}
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}
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//////////////////////////////////////////////////////////////////////////////
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impl<
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T: Serializable
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> Serializable for Vec<T> {
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#[inline]
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fn serialize<
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S: Serializer<E>,
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E
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>(&self, s: &mut S) -> Result<(), E> {
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s.serialize_seq(self.iter())
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}
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}
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//////////////////////////////////////////////////////////////////////////////
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impl<
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K: Serializable + Eq + Hash,
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V: Serializable
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> Serializable for HashMap<K, V> {
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#[inline]
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fn serialize<
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S: Serializer<E>,
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E
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>(&self, s: &mut S) -> Result<(), E> {
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s.serialize_map(self.iter())
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}
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}
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impl<
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K: Serializable + Ord,
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V: Serializable
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> Serializable for TreeMap<K, V> {
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#[inline]
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fn serialize<
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S: Serializer<E>,
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E
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>(&self, s: &mut S) -> Result<(), E> {
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s.serialize_map(self.iter())
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}
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}
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//////////////////////////////////////////////////////////////////////////////
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macro_rules! peel {
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($name:ident, $($other:ident,)*) => (impl_serialize_tuple!($($other,)*))
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}
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macro_rules! impl_serialize_tuple {
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() => {
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impl Serializable for () {
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#[inline]
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fn serialize<
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S: Serializer<E>,
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E
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>(&self, s: &mut S) -> Result<(), E> {
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s.serialize_null()
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}
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}
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};
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( $($name:ident,)+ ) => {
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impl<
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$($name:Serializable),*
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> Serializable for ($($name,)*) {
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#[inline]
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#[allow(uppercase_variables)]
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fn serialize<
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S: Serializer<E>,
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E
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>(&self, s: &mut S) -> Result<(), E> {
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// FIXME: how can we count macro args?
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let mut len = 0;
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$({ let $name = 1; len += $name; })*;
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let ($(ref $name,)*) = *self;
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try!(s.serialize_tuple_start(len));
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$(
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try!(s.serialize_tuple_sep());
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try!($name.serialize(s));
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)*
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s.serialize_tuple_end()
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}
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}
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peel!($($name,)*)
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}
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}
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impl_serialize_tuple! { T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, }
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//////////////////////////////////////////////////////////////////////////////
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#[cfg(test)]
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mod tests {
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use std::collections::{HashMap, TreeMap};
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use serialize::Decoder;
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use super::{Serializer, Serializable};
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//////////////////////////////////////////////////////////////////////////////
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#[deriving(Clone, PartialEq, Show, Decodable)]
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struct Inner {
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a: (),
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b: uint,
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c: HashMap<String, Option<char>>,
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}
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impl Serializable for Inner {
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#[inline]
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fn serialize<
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S: Serializer<E>,
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E
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>(&self, s: &mut S) -> Result<(), E> {
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try!(s.serialize_struct_start("Inner", 3));
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try!(s.serialize_struct_sep("a"));
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try!(self.a.serialize(s));
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try!(s.serialize_struct_sep("b"));
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try!(self.b.serialize(s));
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try!(s.serialize_struct_sep("c"));
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try!(self.c.serialize(s));
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s.serialize_struct_end()
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}
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}
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//////////////////////////////////////////////////////////////////////////////
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#[deriving(Clone, PartialEq, Show, Decodable)]
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struct Outer {
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inner: Vec<Inner>,
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}
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impl Serializable for Outer {
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#[inline]
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fn serialize<
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S: Serializer<E>,
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E
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>(&self, s: &mut S) -> Result<(), E> {
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try!(s.serialize_struct_start("Outer", 1));
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try!(s.serialize_struct_sep("inner"));
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try!(self.inner.serialize(s));
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s.serialize_struct_end()
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}
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}
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//////////////////////////////////////////////////////////////////////////////
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#[deriving(Clone, PartialEq, Show, Decodable)]
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enum Animal {
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Dog,
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Frog(String, int)
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}
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impl Serializable for Animal {
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#[inline]
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fn serialize<
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S: Serializer<E>,
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E
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>(&self, s: &mut S) -> Result<(), E> {
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match *self {
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Dog => {
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try!(s.serialize_enum_start("Animal", "Dog", 0));
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}
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Frog(ref x, y) => {
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try!(s.serialize_enum_start("Animal", "Frog", 2));
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try!(s.serialize_enum_sep());
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try!(x.serialize(s));
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try!(s.serialize_enum_sep());
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try!(y.serialize(s));
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}
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}
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s.serialize_enum_end()
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}
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}
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//////////////////////////////////////////////////////////////////////////////
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#[deriving(Clone, PartialEq, Show)]
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pub enum Token<'a> {
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Null,
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Bool(bool),
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Int(int),
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I8(i8),
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I16(i16),
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I32(i32),
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I64(i64),
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Uint(uint),
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U8(u8),
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U16(u16),
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U32(u32),
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U64(u64),
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F32(f32),
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F64(f64),
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Char(char),
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Str(&'a str),
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TupleStart(uint),
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TupleSep,
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TupleEnd,
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StructStart(&'a str, uint),
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StructSep(&'a str),
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StructEnd,
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EnumStart(&'a str, &'a str, uint),
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EnumSep,
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EnumEnd,
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Option(bool),
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SeqStart(uint),
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SeqEnd,
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MapStart(uint),
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MapEnd,
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}
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#[deriving(Show)]
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enum Error {
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EndOfStream,
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SyntaxError,
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}
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//////////////////////////////////////////////////////////////////////////////
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struct AssertSerializer<Iter> {
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iter: Iter,
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}
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impl<'a, Iter: Iterator<Token<'a>>> AssertSerializer<Iter> {
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fn new(iter: Iter) -> AssertSerializer<Iter> {
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AssertSerializer {
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iter: iter,
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}
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}
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fn serialize<'b>(&mut self, token: Token<'b>) -> Result<(), Error> {
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let t = match self.iter.next() {
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Some(t) => t,
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None => { fail!(); }
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};
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assert_eq!(t, token);
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Ok(())
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}
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}
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impl<'a, Iter: Iterator<Token<'a>>> Serializer<Error> for AssertSerializer<Iter> {
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fn serialize_null(&mut self) -> Result<(), Error> {
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self.serialize(Null)
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}
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fn serialize_bool(&mut self, v: bool) -> Result<(), Error> {
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self.serialize(Bool(v))
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}
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fn serialize_int(&mut self, v: int) -> Result<(), Error> {
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self.serialize(Int(v))
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}
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fn serialize_i8(&mut self, v: i8) -> Result<(), Error> {
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self.serialize(I8(v))
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}
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fn serialize_i16(&mut self, v: i16) -> Result<(), Error> {
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self.serialize(I16(v))
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}
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fn serialize_i32(&mut self, v: i32) -> Result<(), Error> {
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self.serialize(I32(v))
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}
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fn serialize_i64(&mut self, v: i64) -> Result<(), Error> {
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self.serialize(I64(v))
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}
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fn serialize_uint(&mut self, v: uint) -> Result<(), Error> {
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self.serialize(Uint(v))
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}
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fn serialize_u8(&mut self, v: u8) -> Result<(), Error> {
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self.serialize(U8(v))
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}
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fn serialize_u16(&mut self, v: u16) -> Result<(), Error> {
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self.serialize(U16(v))
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}
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fn serialize_u32(&mut self, v: u32) -> Result<(), Error> {
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self.serialize(U32(v))
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}
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fn serialize_u64(&mut self, v: u64) -> Result<(), Error> {
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self.serialize(U64(v))
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}
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fn serialize_f32(&mut self, v: f32) -> Result<(), Error> {
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self.serialize(F32(v))
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}
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fn serialize_f64(&mut self, v: f64) -> Result<(), Error> {
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self.serialize(F64(v))
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}
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fn serialize_char(&mut self, v: char) -> Result<(), Error> {
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self.serialize(Char(v))
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}
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fn serialize_str(&mut self, v: &str) -> Result<(), Error> {
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self.serialize(Str(v))
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}
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fn serialize_tuple_start(&mut self, len: uint) -> Result<(), Error> {
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self.serialize(TupleStart(len))
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}
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fn serialize_tuple_sep(&mut self) -> Result<(), Error> {
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self.serialize(TupleSep)
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}
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fn serialize_tuple_end(&mut self) -> Result<(), Error> {
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self.serialize(TupleEnd)
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}
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fn serialize_struct_start(&mut self, name: &str, len: uint) -> Result<(), Error> {
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self.serialize(StructStart(name, len))
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}
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fn serialize_struct_sep(&mut self, name: &str) -> Result<(), Error> {
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self.serialize(StructSep(name))
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}
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fn serialize_struct_end(&mut self) -> Result<(), Error> {
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self.serialize(StructEnd)
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}
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fn serialize_enum_start(&mut self, name: &str, variant: &str, len: uint) -> Result<(), Error> {
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self.serialize(EnumStart(name, variant, len))
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}
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fn serialize_enum_sep(&mut self) -> Result<(), Error> {
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self.serialize(EnumSep)
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}
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fn serialize_enum_end(&mut self) -> Result<(), Error> {
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self.serialize(EnumEnd)
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}
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fn serialize_option<
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T: Serializable
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>(&mut self, v: &Option<T>) -> Result<(), Error> {
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match *v {
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Some(ref v) => {
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try!(self.serialize(Option(true)));
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v.serialize(self)
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}
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None => {
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self.serialize(Option(false))
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}
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}
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}
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fn serialize_seq<
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T: Serializable,
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SeqIter: Iterator<T>
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>(&mut self, mut iter: SeqIter) -> Result<(), Error> {
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let (len, _) = iter.size_hint();
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try!(self.serialize(SeqStart(len)));
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for elt in iter {
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elt.serialize(self).unwrap();
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}
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self.serialize(SeqEnd)
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}
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fn serialize_map<
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K: Serializable,
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V: Serializable,
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MapIter: Iterator<(K, V)>
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>(&mut self, mut iter: MapIter) -> Result<(), Error> {
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let (len, _) = iter.size_hint();
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try!(self.serialize(MapStart(len)));
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for (key, value) in iter {
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try!(key.serialize(self));
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try!(value.serialize(self));
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}
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|
self.serialize(MapEnd)
|
|
}
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
|
|
#[test]
|
|
fn test_tokens_int() {
|
|
let tokens = vec!(
|
|
Int(5)
|
|
);
|
|
let mut serializer = AssertSerializer::new(tokens.move_iter());
|
|
5i.serialize(&mut serializer).unwrap();
|
|
assert_eq!(serializer.iter.next(), None);
|
|
}
|
|
|
|
#[test]
|
|
fn test_tokens_str() {
|
|
let tokens = vec!(
|
|
Str("a"),
|
|
);
|
|
|
|
let mut serializer = AssertSerializer::new(tokens.move_iter());
|
|
"a".serialize(&mut serializer).unwrap();
|
|
assert_eq!(serializer.iter.next(), None);
|
|
}
|
|
|
|
#[test]
|
|
fn test_tokens_null() {
|
|
let tokens = vec!(
|
|
Null,
|
|
);
|
|
|
|
let mut serializer = AssertSerializer::new(tokens.move_iter());
|
|
().serialize(&mut serializer).unwrap();
|
|
assert_eq!(serializer.iter.next(), None);
|
|
}
|
|
|
|
#[test]
|
|
fn test_tokens_option_none() {
|
|
let tokens = vec!(
|
|
Option(false),
|
|
);
|
|
|
|
let mut serializer = AssertSerializer::new(tokens.move_iter());
|
|
None::<int>.serialize(&mut serializer).unwrap();
|
|
assert_eq!(serializer.iter.next(), None);
|
|
}
|
|
|
|
#[test]
|
|
fn test_tokens_option_some() {
|
|
let tokens = vec!(
|
|
Option(true),
|
|
Int(5),
|
|
);
|
|
|
|
let mut serializer = AssertSerializer::new(tokens.move_iter());
|
|
Some(5).serialize(&mut serializer).unwrap();
|
|
assert_eq!(serializer.iter.next(), None);
|
|
}
|
|
|
|
#[test]
|
|
fn test_tokens_tuple() {
|
|
let tokens = vec!(
|
|
TupleStart(2),
|
|
TupleSep,
|
|
Int(5),
|
|
|
|
TupleSep,
|
|
Str("a"),
|
|
TupleEnd,
|
|
);
|
|
|
|
let mut serializer = AssertSerializer::new(tokens.move_iter());
|
|
(5, "a").serialize(&mut serializer).unwrap();
|
|
assert_eq!(serializer.iter.next(), None);
|
|
}
|
|
|
|
#[test]
|
|
fn test_tokens_tuple_compound() {
|
|
let tokens = vec!(
|
|
TupleStart(3),
|
|
TupleSep,
|
|
Null,
|
|
|
|
TupleSep,
|
|
Null,
|
|
|
|
TupleSep,
|
|
TupleStart(2),
|
|
TupleSep,
|
|
Int(5),
|
|
|
|
TupleSep,
|
|
Str("a"),
|
|
TupleEnd,
|
|
TupleEnd,
|
|
);
|
|
|
|
let mut serializer = AssertSerializer::new(tokens.move_iter());
|
|
((), (), (5, "a")).serialize(&mut serializer).unwrap();
|
|
assert_eq!(serializer.iter.next(), None);
|
|
}
|
|
|
|
#[test]
|
|
fn test_tokens_struct_empty() {
|
|
let tokens = vec!(
|
|
StructStart("Outer", 1),
|
|
StructSep("inner"),
|
|
SeqStart(0),
|
|
SeqEnd,
|
|
StructEnd,
|
|
);
|
|
|
|
let mut serializer = AssertSerializer::new(tokens.move_iter());
|
|
Outer { inner: vec!() }.serialize(&mut serializer).unwrap();
|
|
assert_eq!(serializer.iter.next(), None);
|
|
}
|
|
|
|
#[test]
|
|
fn test_tokens_struct() {
|
|
let tokens = vec!(
|
|
StructStart("Outer", 1),
|
|
StructSep("inner"),
|
|
SeqStart(1),
|
|
StructStart("Inner", 3),
|
|
StructSep("a"),
|
|
Null,
|
|
|
|
StructSep("b"),
|
|
Uint(5),
|
|
|
|
StructSep("c"),
|
|
MapStart(1),
|
|
Str("abc"),
|
|
Option(true),
|
|
Char('c'),
|
|
MapEnd,
|
|
StructEnd,
|
|
SeqEnd,
|
|
StructEnd,
|
|
);
|
|
|
|
let mut serializer = AssertSerializer::new(tokens.move_iter());
|
|
|
|
let mut map = HashMap::new();
|
|
map.insert("abc".to_string(), Some('c'));
|
|
|
|
Outer {
|
|
inner: vec!(
|
|
Inner {
|
|
a: (),
|
|
b: 5,
|
|
c: map,
|
|
},
|
|
)
|
|
}.serialize(&mut serializer).unwrap();
|
|
assert_eq!(serializer.iter.next(), None);
|
|
}
|
|
|
|
#[test]
|
|
fn test_tokens_enum() {
|
|
let tokens = vec!(
|
|
EnumStart("Animal", "Dog", 0),
|
|
EnumEnd,
|
|
);
|
|
|
|
let mut serializer = AssertSerializer::new(tokens.move_iter());
|
|
Dog.serialize(&mut serializer).unwrap();
|
|
assert_eq!(serializer.iter.next(), None);
|
|
|
|
let tokens = vec!(
|
|
EnumStart("Animal", "Frog", 2),
|
|
EnumSep,
|
|
Str("Henry"),
|
|
|
|
EnumSep,
|
|
Int(349),
|
|
EnumEnd,
|
|
);
|
|
|
|
let mut serializer = AssertSerializer::new(tokens.move_iter());
|
|
Frog("Henry".to_string(), 349).serialize(&mut serializer).unwrap();
|
|
assert_eq!(serializer.iter.next(), None);
|
|
}
|
|
|
|
#[test]
|
|
fn test_tokens_vec_empty() {
|
|
let tokens = vec!(
|
|
SeqStart(0),
|
|
SeqEnd,
|
|
);
|
|
|
|
let mut serializer = AssertSerializer::new(tokens.move_iter());
|
|
let v: Vec<int> = vec!();
|
|
v.serialize(&mut serializer).unwrap();
|
|
assert_eq!(serializer.iter.next(), None);
|
|
}
|
|
|
|
#[test]
|
|
fn test_tokens_vec() {
|
|
let tokens = vec!(
|
|
SeqStart(3),
|
|
Int(5),
|
|
Int(6),
|
|
Int(7),
|
|
SeqEnd,
|
|
);
|
|
|
|
let mut serializer = AssertSerializer::new(tokens.move_iter());
|
|
(vec!(5, 6, 7)).serialize(&mut serializer).unwrap();
|
|
assert_eq!(serializer.iter.next(), None);
|
|
}
|
|
|
|
#[test]
|
|
fn test_tokens_vec_compound() {
|
|
let tokens = vec!(
|
|
SeqStart(3),
|
|
SeqStart(1),
|
|
Int(1),
|
|
SeqEnd,
|
|
|
|
SeqStart(2),
|
|
Int(2),
|
|
Int(3),
|
|
SeqEnd,
|
|
|
|
SeqStart(3),
|
|
Int(4),
|
|
Int(5),
|
|
Int(6),
|
|
SeqEnd,
|
|
SeqEnd,
|
|
);
|
|
|
|
let mut serializer = AssertSerializer::new(tokens.move_iter());
|
|
(vec!(vec!(1), vec!(2, 3), vec!(4, 5, 6))).serialize(&mut serializer).unwrap();
|
|
assert_eq!(serializer.iter.next(), None);
|
|
}
|
|
|
|
#[test]
|
|
fn test_tokens_treemap() {
|
|
let tokens = vec!(
|
|
MapStart(2),
|
|
Int(5),
|
|
Str("a"),
|
|
|
|
Int(6),
|
|
Str("b"),
|
|
MapEnd,
|
|
);
|
|
|
|
let mut serializer = AssertSerializer::new(tokens.move_iter());
|
|
|
|
let mut map = TreeMap::new();
|
|
map.insert(5, "a".to_string());
|
|
map.insert(6, "b".to_string());
|
|
|
|
map.serialize(&mut serializer).unwrap();
|
|
assert_eq!(serializer.iter.next(), None);
|
|
}
|
|
}
|