2014-02-05 10:52:54 -06:00
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// Copyright 2012-2014 The Rust Project Developers. See the COPYRIGHT
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2012-12-10 22:37:21 -06:00
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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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//! Support code for encoding and decoding types.
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/*
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Core encoding and decoding interfaces.
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*/
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2014-03-10 22:47:47 -05:00
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use std::path;
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2013-11-25 12:35:03 -06:00
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use std::rc::Rc;
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2012-12-23 16:41:37 -06:00
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2014-03-18 12:58:26 -05:00
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pub trait Encoder<E> {
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// Primitive types:
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fn emit_nil(&mut self) -> Result<(), E>;
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fn emit_uint(&mut self, v: uint) -> Result<(), E>;
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fn emit_u64(&mut self, v: u64) -> Result<(), E>;
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fn emit_u32(&mut self, v: u32) -> Result<(), E>;
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fn emit_u16(&mut self, v: u16) -> Result<(), E>;
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fn emit_u8(&mut self, v: u8) -> Result<(), E>;
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fn emit_int(&mut self, v: int) -> Result<(), E>;
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fn emit_i64(&mut self, v: i64) -> Result<(), E>;
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fn emit_i32(&mut self, v: i32) -> Result<(), E>;
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fn emit_i16(&mut self, v: i16) -> Result<(), E>;
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fn emit_i8(&mut self, v: i8) -> Result<(), E>;
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fn emit_bool(&mut self, v: bool) -> Result<(), E>;
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fn emit_f64(&mut self, v: f64) -> Result<(), E>;
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fn emit_f32(&mut self, v: f32) -> Result<(), E>;
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fn emit_char(&mut self, v: char) -> Result<(), E>;
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fn emit_str(&mut self, v: &str) -> Result<(), E>;
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// Compound types:
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fn emit_enum(&mut self, name: &str, f: |&mut Self| -> Result<(), E>) -> Result<(), E>;
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fn emit_enum_variant(&mut self,
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v_name: &str,
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v_id: uint,
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len: uint,
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f: |&mut Self| -> Result<(), E>) -> Result<(), E>;
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fn emit_enum_variant_arg(&mut self,
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a_idx: uint,
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f: |&mut Self| -> Result<(), E>) -> Result<(), E>;
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fn emit_enum_struct_variant(&mut self,
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v_name: &str,
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v_id: uint,
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len: uint,
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f: |&mut Self| -> Result<(), E>) -> Result<(), E>;
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fn emit_enum_struct_variant_field(&mut self,
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f_name: &str,
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f_idx: uint,
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f: |&mut Self| -> Result<(), E>) -> Result<(), E>;
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fn emit_struct(&mut self,
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name: &str,
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len: uint,
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f: |&mut Self| -> Result<(), E>) -> Result<(), E>;
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fn emit_struct_field(&mut self,
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f_name: &str,
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f_idx: uint,
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f: |&mut Self| -> Result<(), E>) -> Result<(), E>;
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fn emit_tuple(&mut self, len: uint, f: |&mut Self| -> Result<(), E>) -> Result<(), E>;
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fn emit_tuple_arg(&mut self, idx: uint, f: |&mut Self| -> Result<(), E>) -> Result<(), E>;
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fn emit_tuple_struct(&mut self,
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name: &str,
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len: uint,
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f: |&mut Self| -> Result<(), E>) -> Result<(), E>;
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fn emit_tuple_struct_arg(&mut self,
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f_idx: uint,
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f: |&mut Self| -> Result<(), E>) -> Result<(), E>;
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// Specialized types:
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fn emit_option(&mut self, f: |&mut Self| -> Result<(), E>) -> Result<(), E>;
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fn emit_option_none(&mut self) -> Result<(), E>;
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fn emit_option_some(&mut self, f: |&mut Self| -> Result<(), E>) -> Result<(), E>;
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fn emit_seq(&mut self, len: uint, f: |this: &mut Self| -> Result<(), E>) -> Result<(), E>;
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fn emit_seq_elt(&mut self, idx: uint, f: |this: &mut Self| -> Result<(), E>) -> Result<(), E>;
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fn emit_map(&mut self, len: uint, f: |&mut Self| -> Result<(), E>) -> Result<(), E>;
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fn emit_map_elt_key(&mut self, idx: uint, f: |&mut Self| -> Result<(), E>) -> Result<(), E>;
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fn emit_map_elt_val(&mut self, idx: uint, f: |&mut Self| -> Result<(), E>) -> Result<(), E>;
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}
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pub trait Decoder<E> {
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// Primitive types:
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fn read_nil(&mut self) -> Result<(), E>;
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fn read_uint(&mut self) -> Result<uint, E>;
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fn read_u64(&mut self) -> Result<u64, E>;
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fn read_u32(&mut self) -> Result<u32, E>;
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fn read_u16(&mut self) -> Result<u16, E>;
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fn read_u8(&mut self) -> Result<u8, E>;
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fn read_int(&mut self) -> Result<int, E>;
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fn read_i64(&mut self) -> Result<i64, E>;
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fn read_i32(&mut self) -> Result<i32, E>;
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fn read_i16(&mut self) -> Result<i16, E>;
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fn read_i8(&mut self) -> Result<i8, E>;
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fn read_bool(&mut self) -> Result<bool, E>;
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fn read_f64(&mut self) -> Result<f64, E>;
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fn read_f32(&mut self) -> Result<f32, E>;
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fn read_char(&mut self) -> Result<char, E>;
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fn read_str(&mut self) -> Result<~str, E>;
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// Compound types:
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fn read_enum<T>(&mut self, name: &str, f: |&mut Self| -> Result<T, E>) -> Result<T, E>;
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fn read_enum_variant<T>(&mut self,
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names: &[&str],
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f: |&mut Self, uint| -> Result<T, E>)
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-> Result<T, E>;
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fn read_enum_variant_arg<T>(&mut self,
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a_idx: uint,
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f: |&mut Self| -> Result<T, E>)
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-> Result<T, E>;
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fn read_enum_struct_variant<T>(&mut self,
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names: &[&str],
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f: |&mut Self, uint| -> Result<T, E>)
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-> Result<T, E>;
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fn read_enum_struct_variant_field<T>(&mut self,
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&f_name: &str,
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f_idx: uint,
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f: |&mut Self| -> Result<T, E>)
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-> Result<T, E>;
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fn read_struct<T>(&mut self, s_name: &str, len: uint, f: |&mut Self| -> Result<T, E>)
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-> Result<T, E>;
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fn read_struct_field<T>(&mut self,
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f_name: &str,
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f_idx: uint,
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f: |&mut Self| -> Result<T, E>)
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-> Result<T, E>;
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fn read_tuple<T>(&mut self, f: |&mut Self, uint| -> Result<T, E>) -> Result<T, E>;
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fn read_tuple_arg<T>(&mut self, a_idx: uint, f: |&mut Self| -> Result<T, E>) -> Result<T, E>;
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fn read_tuple_struct<T>(&mut self,
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s_name: &str,
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f: |&mut Self, uint| -> Result<T, E>)
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-> Result<T, E>;
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fn read_tuple_struct_arg<T>(&mut self,
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a_idx: uint,
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f: |&mut Self| -> Result<T, E>)
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-> Result<T, E>;
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// Specialized types:
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fn read_option<T>(&mut self, f: |&mut Self, bool| -> Result<T, E>) -> Result<T, E>;
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fn read_seq<T>(&mut self, f: |&mut Self, uint| -> Result<T, E>) -> Result<T, E>;
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fn read_seq_elt<T>(&mut self, idx: uint, f: |&mut Self| -> Result<T, E>) -> Result<T, E>;
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fn read_map<T>(&mut self, f: |&mut Self, uint| -> Result<T, E>) -> Result<T, E>;
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fn read_map_elt_key<T>(&mut self, idx: uint, f: |&mut Self| -> Result<T, E>) -> Result<T, E>;
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fn read_map_elt_val<T>(&mut self, idx: uint, f: |&mut Self| -> Result<T, E>) -> Result<T, E>;
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}
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pub trait Encodable<S:Encoder<E>, E> {
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fn encode(&self, s: &mut S) -> Result<(), E>;
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}
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pub trait Decodable<D:Decoder<E>, E> {
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fn decode(d: &mut D) -> Result<Self, E>;
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}
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macro_rules! try ( ($e:expr) => (
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match $e { Ok(v) => v, Err(e) => return Err(e) }
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))
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impl<E, S:Encoder<E>> Encodable<S, E> for uint {
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fn encode(&self, s: &mut S) -> Result<(), E> {
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s.emit_uint(*self)
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}
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}
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impl<E, D:Decoder<E>> Decodable<D, E> for uint {
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fn decode(d: &mut D) -> Result<uint, E> {
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d.read_uint()
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}
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}
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impl<E, S:Encoder<E>> Encodable<S, E> for u8 {
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fn encode(&self, s: &mut S) -> Result<(), E> {
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s.emit_u8(*self)
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}
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2012-12-10 22:37:21 -06:00
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}
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impl<E, D:Decoder<E>> Decodable<D, E> for u8 {
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fn decode(d: &mut D) -> Result<u8, E> {
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d.read_u8()
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}
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}
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impl<E, S:Encoder<E>> Encodable<S, E> for u16 {
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fn encode(&self, s: &mut S) -> Result<(), E> {
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s.emit_u16(*self)
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}
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}
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impl<E, D:Decoder<E>> Decodable<D, E> for u16 {
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fn decode(d: &mut D) -> Result<u16, E> {
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d.read_u16()
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}
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}
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impl<E, S:Encoder<E>> Encodable<S, E> for u32 {
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fn encode(&self, s: &mut S) -> Result<(), E> {
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s.emit_u32(*self)
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}
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}
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impl<E, D:Decoder<E>> Decodable<D, E> for u32 {
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fn decode(d: &mut D) -> Result<u32, E> {
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d.read_u32()
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}
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}
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impl<E, S:Encoder<E>> Encodable<S, E> for u64 {
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fn encode(&self, s: &mut S) -> Result<(), E> {
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s.emit_u64(*self)
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}
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}
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impl<E, D:Decoder<E>> Decodable<D, E> for u64 {
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fn decode(d: &mut D) -> Result<u64, E> {
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d.read_u64()
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}
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}
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impl<E, S:Encoder<E>> Encodable<S, E> for int {
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fn encode(&self, s: &mut S) -> Result<(), E> {
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s.emit_int(*self)
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}
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}
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impl<E, D:Decoder<E>> Decodable<D, E> for int {
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fn decode(d: &mut D) -> Result<int, E> {
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d.read_int()
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}
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}
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impl<E, S:Encoder<E>> Encodable<S, E> for i8 {
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fn encode(&self, s: &mut S) -> Result<(), E> {
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s.emit_i8(*self)
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}
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}
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impl<E, D:Decoder<E>> Decodable<D, E> for i8 {
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fn decode(d: &mut D) -> Result<i8, E> {
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d.read_i8()
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}
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}
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impl<E, S:Encoder<E>> Encodable<S, E> for i16 {
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fn encode(&self, s: &mut S) -> Result<(), E> {
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s.emit_i16(*self)
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}
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2012-12-10 22:37:21 -06:00
|
|
|
}
|
|
|
|
|
2014-03-18 12:58:26 -05:00
|
|
|
impl<E, D:Decoder<E>> Decodable<D, E> for i16 {
|
|
|
|
fn decode(d: &mut D) -> Result<i16, E> {
|
2013-05-01 19:54:54 -05:00
|
|
|
d.read_i16()
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-03-18 12:58:26 -05:00
|
|
|
impl<E, S:Encoder<E>> Encodable<S, E> for i32 {
|
|
|
|
fn encode(&self, s: &mut S) -> Result<(), E> {
|
2013-05-01 19:54:54 -05:00
|
|
|
s.emit_i32(*self)
|
|
|
|
}
|
2012-12-10 22:37:21 -06:00
|
|
|
}
|
|
|
|
|
2014-03-18 12:58:26 -05:00
|
|
|
impl<E, D:Decoder<E>> Decodable<D, E> for i32 {
|
|
|
|
fn decode(d: &mut D) -> Result<i32, E> {
|
2013-05-01 19:54:54 -05:00
|
|
|
d.read_i32()
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-03-18 12:58:26 -05:00
|
|
|
impl<E, S:Encoder<E>> Encodable<S, E> for i64 {
|
|
|
|
fn encode(&self, s: &mut S) -> Result<(), E> {
|
2013-05-01 19:54:54 -05:00
|
|
|
s.emit_i64(*self)
|
|
|
|
}
|
2012-12-10 22:37:21 -06:00
|
|
|
}
|
|
|
|
|
2014-03-18 12:58:26 -05:00
|
|
|
impl<E, D:Decoder<E>> Decodable<D, E> for i64 {
|
|
|
|
fn decode(d: &mut D) -> Result<i64, E> {
|
2013-05-01 19:54:54 -05:00
|
|
|
d.read_i64()
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-03-18 12:58:26 -05:00
|
|
|
impl<'a, E, S:Encoder<E>> Encodable<S, E> for &'a str {
|
|
|
|
fn encode(&self, s: &mut S) -> Result<(), E> {
|
2013-05-01 19:54:54 -05:00
|
|
|
s.emit_str(*self)
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-03-18 12:58:26 -05:00
|
|
|
impl<E, S:Encoder<E>> Encodable<S, E> for ~str {
|
|
|
|
fn encode(&self, s: &mut S) -> Result<(), E> {
|
2013-05-01 19:54:54 -05:00
|
|
|
s.emit_str(*self)
|
|
|
|
}
|
2012-12-10 22:37:21 -06:00
|
|
|
}
|
|
|
|
|
2014-03-18 12:58:26 -05:00
|
|
|
impl<E, D:Decoder<E>> Decodable<D, E> for ~str {
|
|
|
|
fn decode(d: &mut D) -> Result<~str, E> {
|
2013-05-01 19:54:54 -05:00
|
|
|
d.read_str()
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-03-18 12:58:26 -05:00
|
|
|
impl<E, S:Encoder<E>> Encodable<S, E> for f32 {
|
|
|
|
fn encode(&self, s: &mut S) -> Result<(), E> {
|
2013-05-01 19:54:54 -05:00
|
|
|
s.emit_f32(*self)
|
|
|
|
}
|
2012-12-10 22:37:21 -06:00
|
|
|
}
|
|
|
|
|
2014-03-18 12:58:26 -05:00
|
|
|
impl<E, D:Decoder<E>> Decodable<D, E> for f32 {
|
|
|
|
fn decode(d: &mut D) -> Result<f32, E> {
|
2013-05-01 19:54:54 -05:00
|
|
|
d.read_f32()
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-03-18 12:58:26 -05:00
|
|
|
impl<E, S:Encoder<E>> Encodable<S, E> for f64 {
|
|
|
|
fn encode(&self, s: &mut S) -> Result<(), E> {
|
2013-05-01 19:54:54 -05:00
|
|
|
s.emit_f64(*self)
|
|
|
|
}
|
2012-12-10 22:37:21 -06:00
|
|
|
}
|
|
|
|
|
2014-03-18 12:58:26 -05:00
|
|
|
impl<E, D:Decoder<E>> Decodable<D, E> for f64 {
|
|
|
|
fn decode(d: &mut D) -> Result<f64, E> {
|
2013-05-01 19:54:54 -05:00
|
|
|
d.read_f64()
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-03-18 12:58:26 -05:00
|
|
|
impl<E, S:Encoder<E>> Encodable<S, E> for bool {
|
|
|
|
fn encode(&self, s: &mut S) -> Result<(), E> {
|
2013-05-01 19:54:54 -05:00
|
|
|
s.emit_bool(*self)
|
|
|
|
}
|
2012-12-10 22:37:21 -06:00
|
|
|
}
|
|
|
|
|
2014-03-18 12:58:26 -05:00
|
|
|
impl<E, D:Decoder<E>> Decodable<D, E> for bool {
|
|
|
|
fn decode(d: &mut D) -> Result<bool, E> {
|
2013-05-01 19:54:54 -05:00
|
|
|
d.read_bool()
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-03-18 12:58:26 -05:00
|
|
|
impl<E, S:Encoder<E>> Encodable<S, E> for char {
|
|
|
|
fn encode(&self, s: &mut S) -> Result<(), E> {
|
2013-05-30 23:42:00 -05:00
|
|
|
s.emit_char(*self)
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-03-18 12:58:26 -05:00
|
|
|
impl<E, D:Decoder<E>> Decodable<D, E> for char {
|
|
|
|
fn decode(d: &mut D) -> Result<char, E> {
|
2013-05-30 23:42:00 -05:00
|
|
|
d.read_char()
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-03-18 12:58:26 -05:00
|
|
|
impl<E, S:Encoder<E>> Encodable<S, E> for () {
|
|
|
|
fn encode(&self, s: &mut S) -> Result<(), E> {
|
2013-05-01 19:54:54 -05:00
|
|
|
s.emit_nil()
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-03-18 12:58:26 -05:00
|
|
|
impl<E, D:Decoder<E>> Decodable<D, E> for () {
|
|
|
|
fn decode(d: &mut D) -> Result<(), E> {
|
2013-05-01 19:54:54 -05:00
|
|
|
d.read_nil()
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-03-18 12:58:26 -05:00
|
|
|
impl<'a, E, S:Encoder<E>,T:Encodable<S, E>> Encodable<S, E> for &'a T {
|
|
|
|
fn encode(&self, s: &mut S) -> Result<(), E> {
|
2013-05-01 19:54:54 -05:00
|
|
|
(**self).encode(s)
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-03-18 12:58:26 -05:00
|
|
|
impl<E, S:Encoder<E>,T:Encodable<S, E>> Encodable<S, E> for ~T {
|
|
|
|
fn encode(&self, s: &mut S) -> Result<(), E> {
|
2013-05-01 19:54:54 -05:00
|
|
|
(**self).encode(s)
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-03-18 12:58:26 -05:00
|
|
|
impl<E, D:Decoder<E>,T:Decodable<D, E>> Decodable<D, E> for ~T {
|
|
|
|
fn decode(d: &mut D) -> Result<~T, E> {
|
|
|
|
Ok(~try!(Decodable::decode(d)))
|
2013-05-01 19:54:54 -05:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-03-18 12:58:26 -05:00
|
|
|
impl<E, S:Encoder<E>,T:Encodable<S, E>> Encodable<S, E> for @T {
|
|
|
|
fn encode(&self, s: &mut S) -> Result<(), E> {
|
2013-05-01 19:54:54 -05:00
|
|
|
(**self).encode(s)
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-03-18 12:58:26 -05:00
|
|
|
impl<E, S:Encoder<E>,T:Encodable<S, E>> Encodable<S, E> for Rc<T> {
|
2013-11-25 12:35:03 -06:00
|
|
|
#[inline]
|
2014-03-18 12:58:26 -05:00
|
|
|
fn encode(&self, s: &mut S) -> Result<(), E> {
|
2014-03-21 00:10:44 -05:00
|
|
|
(**self).encode(s)
|
2013-11-25 12:35:03 -06:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-03-18 12:58:26 -05:00
|
|
|
impl<E, D:Decoder<E>,T:Decodable<D, E>> Decodable<D, E> for Rc<T> {
|
2013-11-25 12:35:03 -06:00
|
|
|
#[inline]
|
2014-03-18 12:58:26 -05:00
|
|
|
fn decode(d: &mut D) -> Result<Rc<T>, E> {
|
|
|
|
Ok(Rc::new(try!(Decodable::decode(d))))
|
2013-11-25 12:35:03 -06:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-03-18 12:58:26 -05:00
|
|
|
impl<E, D:Decoder<E>,T:Decodable<D, E> + 'static> Decodable<D, E> for @T {
|
|
|
|
fn decode(d: &mut D) -> Result<@T, E> {
|
|
|
|
Ok(@try!(Decodable::decode(d)))
|
2013-05-01 19:54:54 -05:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-03-18 12:58:26 -05:00
|
|
|
impl<'a, E, S:Encoder<E>,T:Encodable<S, E>> Encodable<S, E> for &'a [T] {
|
|
|
|
fn encode(&self, s: &mut S) -> Result<(), E> {
|
2013-11-20 17:46:49 -06:00
|
|
|
s.emit_seq(self.len(), |s| {
|
2013-08-03 11:45:23 -05:00
|
|
|
for (i, e) in self.iter().enumerate() {
|
2014-03-18 12:58:26 -05:00
|
|
|
try!(s.emit_seq_elt(i, |s| e.encode(s)))
|
2013-05-01 19:54:54 -05:00
|
|
|
}
|
2014-03-18 12:58:26 -05:00
|
|
|
Ok(())
|
2013-11-20 17:46:49 -06:00
|
|
|
})
|
2013-05-01 19:54:54 -05:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-03-18 12:58:26 -05:00
|
|
|
impl<E, S:Encoder<E>,T:Encodable<S, E>> Encodable<S, E> for ~[T] {
|
|
|
|
fn encode(&self, s: &mut S) -> Result<(), E> {
|
2013-11-20 17:46:49 -06:00
|
|
|
s.emit_seq(self.len(), |s| {
|
2013-08-03 11:45:23 -05:00
|
|
|
for (i, e) in self.iter().enumerate() {
|
2014-03-18 12:58:26 -05:00
|
|
|
try!(s.emit_seq_elt(i, |s| e.encode(s)))
|
2013-05-01 19:54:54 -05:00
|
|
|
}
|
2014-03-18 12:58:26 -05:00
|
|
|
Ok(())
|
2013-11-20 17:46:49 -06:00
|
|
|
})
|
2013-05-01 19:54:54 -05:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-03-18 12:58:26 -05:00
|
|
|
impl<E, D:Decoder<E>,T:Decodable<D, E>> Decodable<D, E> for ~[T] {
|
|
|
|
fn decode(d: &mut D) -> Result<~[T], E> {
|
2013-11-20 17:46:49 -06:00
|
|
|
d.read_seq(|d, len| {
|
2014-04-17 17:59:07 -05:00
|
|
|
let mut v: Vec<T> = Vec::with_capacity(len);
|
2014-03-18 12:58:26 -05:00
|
|
|
for i in range(0, len) {
|
|
|
|
v.push(try!(d.read_seq_elt(i, |d| Decodable::decode(d))));
|
|
|
|
}
|
2014-04-17 17:59:07 -05:00
|
|
|
let k = v.move_iter().collect::<~[T]>();
|
|
|
|
Ok(k)
|
2013-11-20 17:46:49 -06:00
|
|
|
})
|
2013-05-01 19:54:54 -05:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-03-18 12:58:26 -05:00
|
|
|
impl<E, S:Encoder<E>,T:Encodable<S, E>> Encodable<S, E> for Vec<T> {
|
|
|
|
fn encode(&self, s: &mut S) -> Result<(), E> {
|
2014-02-18 23:36:51 -06:00
|
|
|
s.emit_seq(self.len(), |s| {
|
|
|
|
for (i, e) in self.iter().enumerate() {
|
2014-03-18 12:58:26 -05:00
|
|
|
try!(s.emit_seq_elt(i, |s| e.encode(s)))
|
2014-02-18 23:36:51 -06:00
|
|
|
}
|
2014-03-18 12:58:26 -05:00
|
|
|
Ok(())
|
2014-02-18 23:36:51 -06:00
|
|
|
})
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-03-18 12:58:26 -05:00
|
|
|
impl<E, D:Decoder<E>,T:Decodable<D, E>> Decodable<D, E> for Vec<T> {
|
|
|
|
fn decode(d: &mut D) -> Result<Vec<T>, E> {
|
2014-02-18 23:36:51 -06:00
|
|
|
d.read_seq(|d, len| {
|
2014-03-18 12:58:26 -05:00
|
|
|
let mut v = Vec::with_capacity(len);
|
|
|
|
for i in range(0, len) {
|
|
|
|
v.push(try!(d.read_seq_elt(i, |d| Decodable::decode(d))));
|
|
|
|
}
|
|
|
|
Ok(v)
|
2014-02-18 23:36:51 -06:00
|
|
|
})
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-03-18 12:58:26 -05:00
|
|
|
impl<E, S:Encoder<E>,T:Encodable<S, E>> Encodable<S, E> for Option<T> {
|
|
|
|
fn encode(&self, s: &mut S) -> Result<(), E> {
|
2013-11-20 17:46:49 -06:00
|
|
|
s.emit_option(|s| {
|
2013-05-01 19:54:54 -05:00
|
|
|
match *self {
|
|
|
|
None => s.emit_option_none(),
|
|
|
|
Some(ref v) => s.emit_option_some(|s| v.encode(s)),
|
|
|
|
}
|
2013-11-20 17:46:49 -06:00
|
|
|
})
|
2013-05-01 19:54:54 -05:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-03-18 12:58:26 -05:00
|
|
|
impl<E, D:Decoder<E>,T:Decodable<D, E>> Decodable<D, E> for Option<T> {
|
|
|
|
fn decode(d: &mut D) -> Result<Option<T>, E> {
|
2013-11-20 17:46:49 -06:00
|
|
|
d.read_option(|d, b| {
|
2013-05-04 16:25:41 -05:00
|
|
|
if b {
|
2014-03-18 12:58:26 -05:00
|
|
|
Ok(Some(try!(Decodable::decode(d))))
|
2013-05-04 16:25:41 -05:00
|
|
|
} else {
|
2014-03-18 12:58:26 -05:00
|
|
|
Ok(None)
|
2012-12-10 22:37:21 -06:00
|
|
|
}
|
2013-11-20 17:46:49 -06:00
|
|
|
})
|
2012-12-10 22:37:21 -06:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-03-22 23:58:51 -05:00
|
|
|
macro_rules! peel(($name:ident, $($other:ident,)*) => (tuple!($($other,)*)))
|
|
|
|
|
|
|
|
macro_rules! tuple (
|
|
|
|
() => ();
|
|
|
|
( $($name:ident,)+ ) => (
|
2014-03-18 12:58:26 -05:00
|
|
|
impl<E, D:Decoder<E>,$($name:Decodable<D, E>),*> Decodable<D,E> for ($($name,)*) {
|
2014-03-22 23:58:51 -05:00
|
|
|
#[allow(uppercase_variables)]
|
2014-03-18 12:58:26 -05:00
|
|
|
fn decode(d: &mut D) -> Result<($($name,)*), E> {
|
2014-03-22 23:58:51 -05:00
|
|
|
d.read_tuple(|d, amt| {
|
|
|
|
let mut i = 0;
|
2014-03-18 12:58:26 -05:00
|
|
|
let ret = ($(try!(d.read_tuple_arg({ i+=1; i-1 }, |d| -> Result<$name,E> {
|
2014-03-22 23:58:51 -05:00
|
|
|
Decodable::decode(d)
|
2014-03-18 12:58:26 -05:00
|
|
|
})),)*);
|
2014-03-22 23:58:51 -05:00
|
|
|
assert!(amt == i,
|
|
|
|
"expected tuple of length `{}`, found tuple \
|
|
|
|
of length `{}`", i, amt);
|
2014-03-18 12:58:26 -05:00
|
|
|
return Ok(ret);
|
2013-11-20 17:46:49 -06:00
|
|
|
})
|
2013-05-01 19:54:54 -05:00
|
|
|
}
|
|
|
|
}
|
2014-03-18 12:58:26 -05:00
|
|
|
impl<E, S:Encoder<E>,$($name:Encodable<S, E>),*> Encodable<S, E> for ($($name,)*) {
|
2014-03-22 23:58:51 -05:00
|
|
|
#[allow(uppercase_variables)]
|
2014-03-18 12:58:26 -05:00
|
|
|
fn encode(&self, s: &mut S) -> Result<(), E> {
|
2014-03-22 23:58:51 -05:00
|
|
|
let ($(ref $name,)*) = *self;
|
|
|
|
let mut n = 0;
|
|
|
|
$(let $name = $name; n += 1;)*
|
|
|
|
s.emit_tuple(n, |s| {
|
|
|
|
let mut i = 0;
|
2014-03-18 12:58:26 -05:00
|
|
|
$(try!(s.emit_seq_elt({ i+=1; i-1 }, |s| $name.encode(s)));)*
|
|
|
|
Ok(())
|
2013-11-20 17:46:49 -06:00
|
|
|
})
|
2013-05-01 19:54:54 -05:00
|
|
|
}
|
|
|
|
}
|
2014-03-22 23:58:51 -05:00
|
|
|
peel!($($name,)*)
|
|
|
|
)
|
|
|
|
)
|
2013-05-01 19:54:54 -05:00
|
|
|
|
2014-03-22 23:58:51 -05:00
|
|
|
tuple! { T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, }
|
2013-05-01 19:54:54 -05:00
|
|
|
|
2014-03-18 12:58:26 -05:00
|
|
|
impl<E, S: Encoder<E>> Encodable<S, E> for path::posix::Path {
|
|
|
|
fn encode(&self, e: &mut S) -> Result<(), E> {
|
2014-03-10 22:47:47 -05:00
|
|
|
self.as_vec().encode(e)
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-03-18 12:58:26 -05:00
|
|
|
impl<E, D: Decoder<E>> Decodable<D, E> for path::posix::Path {
|
|
|
|
fn decode(d: &mut D) -> Result<path::posix::Path, E> {
|
|
|
|
let bytes: ~[u8] = try!(Decodable::decode(d));
|
|
|
|
Ok(path::posix::Path::new(bytes))
|
2014-03-10 22:47:47 -05:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-03-18 12:58:26 -05:00
|
|
|
impl<E, S: Encoder<E>> Encodable<S, E> for path::windows::Path {
|
|
|
|
fn encode(&self, e: &mut S) -> Result<(), E> {
|
2014-03-10 22:47:47 -05:00
|
|
|
self.as_vec().encode(e)
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-03-18 12:58:26 -05:00
|
|
|
impl<E, D: Decoder<E>> Decodable<D, E> for path::windows::Path {
|
|
|
|
fn decode(d: &mut D) -> Result<path::windows::Path, E> {
|
|
|
|
let bytes: ~[u8] = try!(Decodable::decode(d));
|
|
|
|
Ok(path::windows::Path::new(bytes))
|
2014-03-10 22:47:47 -05:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2012-12-10 22:37:21 -06:00
|
|
|
// ___________________________________________________________________________
|
|
|
|
// Helper routines
|
|
|
|
//
|
|
|
|
// In some cases, these should eventually be coded as traits.
|
|
|
|
|
2014-03-18 12:58:26 -05:00
|
|
|
pub trait EncoderHelpers<E> {
|
|
|
|
fn emit_from_vec<T>(&mut self,
|
|
|
|
v: &[T],
|
|
|
|
f: |&mut Self, v: &T| -> Result<(), E>) -> Result<(), E>;
|
2013-05-01 19:54:54 -05:00
|
|
|
}
|
|
|
|
|
2014-03-18 12:58:26 -05:00
|
|
|
impl<E, S:Encoder<E>> EncoderHelpers<E> for S {
|
|
|
|
fn emit_from_vec<T>(&mut self, v: &[T], f: |&mut S, &T| -> Result<(), E>) -> Result<(), E> {
|
2013-11-20 17:46:49 -06:00
|
|
|
self.emit_seq(v.len(), |this| {
|
2013-08-03 11:45:23 -05:00
|
|
|
for (i, e) in v.iter().enumerate() {
|
2014-03-18 12:58:26 -05:00
|
|
|
try!(this.emit_seq_elt(i, |this| {
|
2013-05-01 19:54:54 -05:00
|
|
|
f(this, e)
|
2014-03-18 12:58:26 -05:00
|
|
|
}));
|
2013-05-01 19:54:54 -05:00
|
|
|
}
|
2014-03-18 12:58:26 -05:00
|
|
|
Ok(())
|
2013-11-20 17:46:49 -06:00
|
|
|
})
|
2013-05-01 19:54:54 -05:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-03-18 12:58:26 -05:00
|
|
|
pub trait DecoderHelpers<E> {
|
|
|
|
fn read_to_vec<T>(&mut self, f: |&mut Self| -> Result<T, E>) -> Result<~[T], E>;
|
2013-05-01 19:54:54 -05:00
|
|
|
}
|
|
|
|
|
2014-03-18 12:58:26 -05:00
|
|
|
impl<E, D:Decoder<E>> DecoderHelpers<E> for D {
|
|
|
|
fn read_to_vec<T>(&mut self, f: |&mut D| -> Result<T, E>) -> Result<~[T], E> {
|
2013-11-20 17:46:49 -06:00
|
|
|
self.read_seq(|this, len| {
|
2014-04-17 17:59:07 -05:00
|
|
|
let mut v = Vec::with_capacity(len);
|
2014-03-18 12:58:26 -05:00
|
|
|
for i in range(0, len) {
|
|
|
|
v.push(try!(this.read_seq_elt(i, |this| f(this))));
|
|
|
|
}
|
2014-04-17 17:59:07 -05:00
|
|
|
Ok(v.move_iter().collect())
|
2013-11-20 17:46:49 -06:00
|
|
|
})
|
2013-05-01 19:54:54 -05:00
|
|
|
}
|
|
|
|
}
|