mirror of
https://github.com/pezkuwichain/serde.git
synced 2026-04-25 18:37:55 +00:00
Erick Tryzelaar
1292 lines
34 KiB
Rust
1292 lines
34 KiB
Rust
use std::collections::{BTreeMap, BTreeSet, HashMap, HashSet};
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use std::collections::hash_state::HashState;
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use std::hash::{Hash, Hasher};
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use std::rc::Rc;
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use std::str;
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use std::sync::Arc;
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///////////////////////////////////////////////////////////////////////////////
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pub trait Serialize {
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fn visit<
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V: Visitor,
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>(&self, visitor: &mut V) -> Result<V::Value, V::Error>;
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}
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///////////////////////////////////////////////////////////////////////////////
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pub trait Serializer {
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type Value;
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type Error;
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fn visit<T>(&mut self, value: &T) -> Result<Self::Value, Self::Error>
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where T: Serialize;
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}
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///////////////////////////////////////////////////////////////////////////////
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pub trait Visitor {
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type Value;
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type Error;
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fn visit_bool(&mut self, v: bool) -> Result<Self::Value, Self::Error>;
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#[inline]
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fn visit_isize(&mut self, v: isize) -> Result<Self::Value, Self::Error> {
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self.visit_i64(v as i64)
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}
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#[inline]
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fn visit_i8(&mut self, v: i8) -> Result<Self::Value, Self::Error> {
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self.visit_i64(v as i64)
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}
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#[inline]
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fn visit_i16(&mut self, v: i16) -> Result<Self::Value, Self::Error> {
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self.visit_i64(v as i64)
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}
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#[inline]
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fn visit_i32(&mut self, v: i32) -> Result<Self::Value, Self::Error> {
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self.visit_i64(v as i64)
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}
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#[inline]
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fn visit_i64(&mut self, v: i64) -> Result<Self::Value, Self::Error>;
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#[inline]
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fn visit_usize(&mut self, v: usize) -> Result<Self::Value, Self::Error> {
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self.visit_u64(v as u64)
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}
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#[inline]
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fn visit_u8(&mut self, v: u8) -> Result<Self::Value, Self::Error> {
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self.visit_u64(v as u64)
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}
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#[inline]
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fn visit_u16(&mut self, v: u16) -> Result<Self::Value, Self::Error> {
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self.visit_u64(v as u64)
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}
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#[inline]
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fn visit_u32(&mut self, v: u32) -> Result<Self::Value, Self::Error> {
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self.visit_u64(v as u64)
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}
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#[inline]
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fn visit_u64(&mut self, v: u64) -> Result<Self::Value, Self::Error>;
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#[inline]
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fn visit_f32(&mut self, v: f32) -> Result<Self::Value, Self::Error> {
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self.visit_f64(v as f64)
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}
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fn visit_f64(&mut self, v: f64) -> Result<Self::Value, Self::Error>;
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#[inline]
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fn visit_char(&mut self, v: char) -> Result<Self::Value, Self::Error> {
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// The unwraps in here should be safe.
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let mut s = &mut [0; 4];
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let len = v.encode_utf8(s).unwrap();
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self.visit_str(str::from_utf8(&s[..len]).unwrap())
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}
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fn visit_str(&mut self, value: &str) -> Result<Self::Value, Self::Error>;
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fn visit_unit(&mut self) -> Result<Self::Value, Self::Error>;
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#[inline]
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fn visit_named_unit(&mut self, _name: &str) -> Result<Self::Value, Self::Error> {
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self.visit_unit()
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}
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#[inline]
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fn visit_enum_unit(&mut self,
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_name: &str,
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_variant: &str) -> Result<Self::Value, Self::Error> {
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self.visit_unit()
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}
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fn visit_none(&mut self) -> Result<Self::Value, Self::Error>;
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fn visit_some<V>(&mut self, value: V) -> Result<Self::Value, Self::Error>
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where V: Serialize;
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fn visit_seq<V>(&mut self, visitor: V) -> Result<Self::Value, Self::Error>
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where V: SeqVisitor;
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#[inline]
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fn visit_named_seq<V>(&mut self,
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_name: &'static str,
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visitor: V) -> Result<Self::Value, Self::Error>
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where V: SeqVisitor,
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{
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self.visit_seq(visitor)
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}
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#[inline]
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fn visit_enum_seq<V>(&mut self,
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_name: &'static str,
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_variant: &'static str,
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visitor: V) -> Result<Self::Value, Self::Error>
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where V: SeqVisitor,
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{
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self.visit_seq(visitor)
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}
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fn visit_seq_elt<T>(&mut self,
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first: bool,
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value: T) -> Result<Self::Value, Self::Error>
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where T: Serialize;
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fn visit_map<V>(&mut self, visitor: V) -> Result<Self::Value, Self::Error>
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where V: MapVisitor;
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#[inline]
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fn visit_named_map<V>(&mut self,
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_name: &'static str,
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visitor: V) -> Result<Self::Value, Self::Error>
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where V: MapVisitor,
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{
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self.visit_map(visitor)
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}
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#[inline]
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fn visit_enum_map<V>(&mut self,
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_name: &'static str,
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_variant: &'static str,
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visitor: V) -> Result<Self::Value, Self::Error>
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where V: MapVisitor,
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{
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self.visit_map(visitor)
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}
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fn visit_map_elt<K, V>(&mut self,
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first: bool,
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key: K,
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value: V) -> Result<Self::Value, Self::Error>
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where K: Serialize,
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V: Serialize;
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}
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pub trait SeqVisitor {
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fn visit<
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V: Visitor,
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>(&mut self, visitor: &mut V) -> Result<Option<V::Value>, V::Error>;
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#[inline]
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fn size_hint(&self) -> (usize, Option<usize>) {
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(0, None)
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}
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}
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pub trait MapVisitor {
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fn visit<
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V: Visitor,
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>(&mut self, visitor: &mut V) -> Result<Option<V::Value>, V::Error>;
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#[inline]
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fn size_hint(&self) -> (usize, Option<usize>) {
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(0, None)
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}
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}
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///////////////////////////////////////////////////////////////////////////////
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macro_rules! impl_visit {
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($ty:ty, $method:ident) => {
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impl Serialize for $ty {
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#[inline]
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fn visit<
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V: Visitor,
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>(&self, visitor: &mut V) -> Result<V::Value, V::Error> {
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visitor.$method(*self)
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}
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}
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}
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}
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impl_visit!(bool, visit_bool);
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impl_visit!(isize, visit_isize);
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impl_visit!(i8, visit_i8);
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impl_visit!(i16, visit_i16);
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impl_visit!(i32, visit_i32);
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impl_visit!(i64, visit_i64);
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impl_visit!(usize, visit_usize);
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impl_visit!(u8, visit_u8);
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impl_visit!(u16, visit_u16);
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impl_visit!(u32, visit_u32);
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impl_visit!(u64, visit_u64);
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impl_visit!(f32, visit_f32);
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impl_visit!(f64, visit_f64);
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impl_visit!(char, visit_char);
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///////////////////////////////////////////////////////////////////////////////
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impl<'a> Serialize for &'a str {
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#[inline]
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fn visit<
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V: Visitor,
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>(&self, visitor: &mut V) -> Result<V::Value, V::Error> {
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visitor.visit_str(*self)
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}
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}
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impl Serialize for String {
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#[inline]
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fn visit<
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V: Visitor,
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>(&self, visitor: &mut V) -> Result<V::Value, V::Error> {
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(&self[]).visit(visitor)
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}
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}
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///////////////////////////////////////////////////////////////////////////////
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impl<T> Serialize for Option<T> where T: Serialize {
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#[inline]
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fn visit<
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V: Visitor,
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>(&self, visitor: &mut V) -> Result<V::Value, V::Error> {
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match *self {
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Some(ref value) => visitor.visit_some(value),
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None => visitor.visit_none(),
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}
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}
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}
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///////////////////////////////////////////////////////////////////////////////
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pub struct SeqIteratorVisitor<Iter> {
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iter: Iter,
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first: bool,
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}
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impl<T, Iter: Iterator<Item=T>> SeqIteratorVisitor<Iter> {
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#[inline]
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pub fn new(iter: Iter) -> SeqIteratorVisitor<Iter> {
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SeqIteratorVisitor {
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iter: iter,
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first: true,
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}
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}
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}
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impl<
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T: Serialize,
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Iter: Iterator<Item=T>,
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> SeqVisitor for SeqIteratorVisitor<Iter> {
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#[inline]
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fn visit<
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V: Visitor,
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>(&mut self, visitor: &mut V) -> Result<Option<V::Value>, V::Error> {
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let first = self.first;
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self.first = false;
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match self.iter.next() {
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Some(value) => {
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let value = try!(visitor.visit_seq_elt(first, value));
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Ok(Some(value))
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}
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None => Ok(None),
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}
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}
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#[inline]
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fn size_hint(&self) -> (usize, Option<usize>) {
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self.iter.size_hint()
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}
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}
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///////////////////////////////////////////////////////////////////////////////
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impl<
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'a,
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T: Serialize,
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> Serialize for &'a [T] {
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#[inline]
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fn visit<
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V: Visitor,
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>(&self, visitor: &mut V) -> Result<V::Value, V::Error> {
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visitor.visit_seq(SeqIteratorVisitor::new(self.iter()))
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}
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}
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impl<
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T: Serialize,
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> Serialize for Vec<T> {
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#[inline]
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fn visit<
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V: Visitor,
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>(&self, visitor: &mut V) -> Result<V::Value, V::Error> {
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(&self[]).visit(visitor)
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}
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}
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impl<T> Serialize for BTreeSet<T> where T: Serialize {
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#[inline]
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fn visit<
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V: Visitor,
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>(&self, visitor: &mut V) -> Result<V::Value, V::Error> {
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visitor.visit_seq(SeqIteratorVisitor::new(self.iter()))
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}
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}
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impl<T, S, H> Serialize for HashSet<T, S>
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where T: Serialize + Eq + Hash<H>,
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S: HashState<Hasher=H>,
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H: Hasher<Output=u64>,
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{
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#[inline]
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fn visit<V: Visitor>(&self, visitor: &mut V) -> Result<V::Value, V::Error> {
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visitor.visit_seq(SeqIteratorVisitor::new(self.iter()))
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}
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}
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///////////////////////////////////////////////////////////////////////////////
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impl Serialize for () {
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#[inline]
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fn visit<
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V: Visitor,
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>(&self, visitor: &mut V) -> Result<V::Value, V::Error> {
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visitor.visit_unit()
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}
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}
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///////////////////////////////////////////////////////////////////////////////
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// FIXME(rust #19630) Remove this work-around
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macro_rules! e {
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($e:expr) => { $e }
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}
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macro_rules! tuple_impls {
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($(
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$TupleVisitor:ident ($len:expr, $($T:ident),+) {
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$($state:pat => $idx:tt,)+
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}
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)+) => {
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$(
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pub struct $TupleVisitor<'a, $($T: 'a),+> {
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tuple: &'a ($($T,)+),
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state: u8,
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first: bool,
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}
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impl<'a, $($T: 'a),+> $TupleVisitor<'a, $($T),+> {
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pub fn new(tuple: &'a ($($T,)+)) -> $TupleVisitor<'a, $($T),+> {
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$TupleVisitor {
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tuple: tuple,
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state: 0,
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first: true,
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}
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}
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}
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impl<
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'a,
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$($T: Serialize),+
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> SeqVisitor for $TupleVisitor<'a, $($T),+> {
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fn visit<
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V: Visitor,
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>(&mut self, visitor: &mut V) -> Result<Option<V::Value>, V::Error> {
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let first = self.first;
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self.first = false;
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match self.state {
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$(
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$state => {
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self.state += 1;
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Ok(Some(try!(visitor.visit_seq_elt(first, &e!(self.tuple.$idx)))))
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}
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)+
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_ => {
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Ok(None)
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}
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}
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}
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fn size_hint(&self) -> (usize, Option<usize>) {
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($len, Some($len))
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}
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}
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impl<
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$($T: Serialize),+
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> Serialize for ($($T,)+) {
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#[inline]
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fn visit<V: Visitor>(&self, visitor: &mut V) -> Result<V::Value, V::Error> {
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visitor.visit_seq($TupleVisitor::new(self))
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}
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}
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)+
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}
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}
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tuple_impls! {
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TupleVisitor1 (1, T0) {
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0 => 0,
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}
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TupleVisitor2 (2, T0, T1) {
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0 => 0,
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1 => 1,
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}
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TupleVisitor3 (3, T0, T1, T2) {
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0 => 0,
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1 => 1,
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2 => 2,
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}
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TupleVisitor4 (4, T0, T1, T2, T3) {
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0 => 0,
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1 => 1,
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2 => 2,
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3 => 3,
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}
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TupleVisitor5 (5, T0, T1, T2, T3, T4) {
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0 => 0,
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1 => 1,
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2 => 2,
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3 => 3,
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4 => 4,
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}
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TupleVisitor6 (6, T0, T1, T2, T3, T4, T5) {
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0 => 0,
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1 => 1,
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2 => 2,
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3 => 3,
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4 => 4,
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5 => 5,
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}
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TupleVisitor7 (7, T0, T1, T2, T3, T4, T5, T6) {
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0 => 0,
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1 => 1,
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2 => 2,
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3 => 3,
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4 => 4,
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5 => 5,
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6 => 6,
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}
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TupleVisitor8 (8, T0, T1, T2, T3, T4, T5, T6, T7) {
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0 => 0,
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1 => 1,
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2 => 2,
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3 => 3,
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4 => 4,
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5 => 5,
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6 => 6,
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7 => 7,
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}
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TupleVisitor9 (9, T0, T1, T2, T3, T4, T5, T6, T7, T8) {
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0 => 0,
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1 => 1,
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2 => 2,
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|
3 => 3,
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4 => 4,
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5 => 5,
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6 => 6,
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7 => 7,
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8 => 8,
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}
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TupleVisitor10 (10, T0, T1, T2, T3, T4, T5, T6, T7, T8, T9) {
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0 => 0,
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1 => 1,
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2 => 2,
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3 => 3,
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|
4 => 4,
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5 => 5,
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6 => 6,
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7 => 7,
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8 => 8,
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9 => 9,
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}
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TupleVisitor11 (11, T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10) {
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0 => 0,
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1 => 1,
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2 => 2,
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|
3 => 3,
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|
4 => 4,
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|
5 => 5,
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|
6 => 6,
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7 => 7,
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8 => 8,
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9 => 9,
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10 => 10,
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}
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TupleVisitor12 (12, T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11) {
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0 => 0,
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1 => 1,
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2 => 2,
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|
3 => 3,
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4 => 4,
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5 => 5,
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6 => 6,
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7 => 7,
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8 => 8,
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9 => 9,
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10 => 10,
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11 => 11,
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}
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}
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|
///////////////////////////////////////////////////////////////////////////////
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|
|
|
pub struct MapIteratorVisitor<Iter> {
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iter: Iter,
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first: bool,
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}
|
|
|
|
impl<K, V, Iter: Iterator<Item=(K, V)>> MapIteratorVisitor<Iter> {
|
|
#[inline]
|
|
pub fn new(iter: Iter) -> MapIteratorVisitor<Iter> {
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MapIteratorVisitor {
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iter: iter,
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first: true,
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|
}
|
|
}
|
|
}
|
|
|
|
impl<K, V, I> MapVisitor for MapIteratorVisitor<I>
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|
where K: Serialize,
|
|
V: Serialize,
|
|
I: Iterator<Item=(K, V)>,
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|
{
|
|
#[inline]
|
|
fn visit<
|
|
V_: Visitor,
|
|
>(&mut self, visitor: &mut V_) -> Result<Option<V_::Value>, V_::Error> {
|
|
let first = self.first;
|
|
self.first = false;
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|
|
|
match self.iter.next() {
|
|
Some((key, value)) => {
|
|
let value = try!(visitor.visit_map_elt(first, key, value));
|
|
Ok(Some(value))
|
|
}
|
|
None => Ok(None)
|
|
}
|
|
}
|
|
|
|
#[inline]
|
|
fn size_hint(&self) -> (usize, Option<usize>) {
|
|
self.iter.size_hint()
|
|
}
|
|
}
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
|
|
impl<K, V> Serialize for BTreeMap<K, V>
|
|
where K: Serialize + Ord,
|
|
V: Serialize,
|
|
{
|
|
#[inline]
|
|
fn visit<V_: Visitor>(&self, visitor: &mut V_) -> Result<V_::Value, V_::Error> {
|
|
visitor.visit_map(MapIteratorVisitor::new(self.iter()))
|
|
}
|
|
}
|
|
|
|
impl<K, V, S, H> Serialize for HashMap<K, V, S>
|
|
where K: Serialize + Eq + Hash<H>,
|
|
V: Serialize,
|
|
S: HashState<Hasher=H>,
|
|
H: Hasher<Output=u64>,
|
|
{
|
|
#[inline]
|
|
fn visit<V_: Visitor>(&self, visitor: &mut V_) -> Result<V_::Value, V_::Error> {
|
|
visitor.visit_map(MapIteratorVisitor::new(self.iter()))
|
|
}
|
|
}
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
|
|
impl<'a, T> Serialize for &'a T where T: Serialize {
|
|
#[inline]
|
|
fn visit<
|
|
V: Visitor,
|
|
>(&self, visitor: &mut V) -> Result<V::Value, V::Error> {
|
|
(**self).visit(visitor)
|
|
}
|
|
}
|
|
|
|
impl<'a, T> Serialize for Box<T> where T: Serialize {
|
|
#[inline]
|
|
fn visit<
|
|
V: Visitor,
|
|
>(&self, visitor: &mut V) -> Result<V::Value, V::Error> {
|
|
(**self).visit(visitor)
|
|
}
|
|
}
|
|
|
|
impl<
|
|
'a,
|
|
T: Serialize,
|
|
> Serialize for Rc<T> {
|
|
#[inline]
|
|
fn visit<
|
|
V: Visitor,
|
|
>(&self, visitor: &mut V) -> Result<V::Value, V::Error> {
|
|
(**self).visit(visitor)
|
|
}
|
|
}
|
|
|
|
impl<
|
|
'a,
|
|
T: Serialize,
|
|
> Serialize for Arc<T> {
|
|
#[inline]
|
|
fn visit<
|
|
V: Visitor,
|
|
>(&self, visitor: &mut V) -> Result<V::Value, V::Error> {
|
|
(**self).visit(visitor)
|
|
}
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
|
|
#[cfg(test)]
|
|
mod tests {
|
|
use super::{Serialize, Serializer, Visitor, SeqVisitor, MapVisitor};
|
|
use std::vec;
|
|
use std::collections::BTreeMap;
|
|
|
|
#[derive(Clone, PartialEq, Debug)]
|
|
pub enum Token<'a> {
|
|
Bool(bool),
|
|
Isize(isize),
|
|
I8(i8),
|
|
I16(i16),
|
|
I32(i32),
|
|
I64(i64),
|
|
Usize(usize),
|
|
U8(u8),
|
|
U16(u16),
|
|
U32(u32),
|
|
U64(u64),
|
|
F32(f32),
|
|
F64(f64),
|
|
Char(char),
|
|
Str(&'a str),
|
|
|
|
Option(bool),
|
|
|
|
Unit,
|
|
NamedUnit(&'a str),
|
|
EnumUnit(&'a str, &'a str),
|
|
|
|
SeqStart(usize),
|
|
NamedSeqStart(&'a str, usize),
|
|
EnumSeqStart(&'a str, &'a str, usize),
|
|
SeqSep(bool),
|
|
SeqEnd,
|
|
|
|
MapStart(usize),
|
|
NamedMapStart(&'a str, usize),
|
|
EnumMapStart(&'a str, &'a str, usize),
|
|
MapSep(bool),
|
|
MapEnd,
|
|
}
|
|
|
|
struct AssertSerializer<'a> {
|
|
iter: vec::IntoIter<Token<'a>>,
|
|
}
|
|
|
|
impl<'a> AssertSerializer<'a> {
|
|
fn new(values: Vec<Token<'a>>) -> AssertSerializer {
|
|
AssertSerializer {
|
|
iter: values.into_iter(),
|
|
}
|
|
}
|
|
|
|
fn visit_sequence<V>(&mut self, mut visitor: V) -> Result<(), ()>
|
|
where V: SeqVisitor
|
|
{
|
|
while let Some(()) = try!(visitor.visit(self)) { }
|
|
|
|
assert_eq!(self.iter.next(), Some(Token::SeqEnd));
|
|
|
|
Ok(())
|
|
}
|
|
|
|
fn visit_mapping<V>(&mut self, mut visitor: V) -> Result<(), ()>
|
|
where V: MapVisitor
|
|
{
|
|
while let Some(()) = try!(visitor.visit(self)) { }
|
|
|
|
assert_eq!(self.iter.next(), Some(Token::MapEnd));
|
|
|
|
Ok(())
|
|
}
|
|
}
|
|
|
|
impl<'a> Serializer for AssertSerializer<'a> {
|
|
type Value = ();
|
|
type Error = ();
|
|
|
|
fn visit<T: Serialize>(&mut self, value: &T) -> Result<(), ()> {
|
|
value.visit(self)
|
|
}
|
|
}
|
|
|
|
impl<'a> Visitor for AssertSerializer<'a> {
|
|
type Value = ();
|
|
type Error = ();
|
|
|
|
fn visit_unit(&mut self) -> Result<(), ()> {
|
|
assert_eq!(self.iter.next(), Some(Token::Unit));
|
|
Ok(())
|
|
}
|
|
|
|
fn visit_named_unit(&mut self, name: &str) -> Result<(), ()> {
|
|
assert_eq!(self.iter.next().unwrap(), Token::NamedUnit(name));
|
|
Ok(())
|
|
}
|
|
|
|
fn visit_enum_unit(&mut self, name: &str, variant: &str) -> Result<(), ()> {
|
|
assert_eq!(self.iter.next().unwrap(), Token::EnumUnit(name, variant));
|
|
Ok(())
|
|
}
|
|
|
|
fn visit_bool(&mut self, v: bool) -> Result<(), ()> {
|
|
assert_eq!(self.iter.next(), Some(Token::Bool(v)));
|
|
Ok(())
|
|
}
|
|
|
|
fn visit_isize(&mut self, v: isize) -> Result<(), ()> {
|
|
assert_eq!(self.iter.next(), Some(Token::Isize(v)));
|
|
Ok(())
|
|
}
|
|
|
|
fn visit_i8(&mut self, v: i8) -> Result<(), ()> {
|
|
assert_eq!(self.iter.next(), Some(Token::I8(v)));
|
|
Ok(())
|
|
}
|
|
|
|
fn visit_i16(&mut self, v: i16) -> Result<(), ()> {
|
|
assert_eq!(self.iter.next(), Some(Token::I16(v)));
|
|
Ok(())
|
|
}
|
|
|
|
fn visit_i32(&mut self, v: i32) -> Result<(), ()> {
|
|
assert_eq!(self.iter.next(), Some(Token::I32(v)));
|
|
Ok(())
|
|
}
|
|
|
|
fn visit_i64(&mut self, v: i64) -> Result<(), ()> {
|
|
assert_eq!(self.iter.next(), Some(Token::I64(v)));
|
|
Ok(())
|
|
}
|
|
|
|
fn visit_usize(&mut self, v: usize) -> Result<(), ()> {
|
|
assert_eq!(self.iter.next(), Some(Token::Usize(v)));
|
|
Ok(())
|
|
}
|
|
|
|
fn visit_u8(&mut self, v: u8) -> Result<(), ()> {
|
|
assert_eq!(self.iter.next(), Some(Token::U8(v)));
|
|
Ok(())
|
|
}
|
|
|
|
fn visit_u16(&mut self, v: u16) -> Result<(), ()> {
|
|
assert_eq!(self.iter.next(), Some(Token::U16(v)));
|
|
Ok(())
|
|
}
|
|
|
|
fn visit_u32(&mut self, v: u32) -> Result<(), ()> {
|
|
assert_eq!(self.iter.next(), Some(Token::U32(v)));
|
|
Ok(())
|
|
}
|
|
|
|
fn visit_u64(&mut self, v: u64) -> Result<(), ()> {
|
|
assert_eq!(self.iter.next(), Some(Token::U64(v)));
|
|
Ok(())
|
|
}
|
|
|
|
fn visit_f32(&mut self, v: f32) -> Result<(), ()> {
|
|
assert_eq!(self.iter.next(), Some(Token::F32(v)));
|
|
Ok(())
|
|
}
|
|
|
|
fn visit_f64(&mut self, v: f64) -> Result<(), ()> {
|
|
assert_eq!(self.iter.next(), Some(Token::F64(v)));
|
|
Ok(())
|
|
}
|
|
|
|
fn visit_char(&mut self, v: char) -> Result<(), ()> {
|
|
assert_eq!(self.iter.next(), Some(Token::Char(v)));
|
|
Ok(())
|
|
}
|
|
|
|
fn visit_str(&mut self, v: &str) -> Result<(), ()> {
|
|
assert_eq!(self.iter.next().unwrap(), Token::Str(v));
|
|
Ok(())
|
|
}
|
|
|
|
fn visit_none(&mut self) -> Result<(), ()> {
|
|
assert_eq!(self.iter.next(), Some(Token::Option(false)));
|
|
Ok(())
|
|
}
|
|
|
|
fn visit_some<V>(&mut self, value: V) -> Result<(), ()>
|
|
where V: Serialize,
|
|
{
|
|
assert_eq!(self.iter.next(), Some(Token::Option(true)));
|
|
value.visit(self)
|
|
}
|
|
|
|
|
|
fn visit_seq<V>(&mut self, visitor: V) -> Result<(), ()>
|
|
where V: SeqVisitor
|
|
{
|
|
let (len, _) = visitor.size_hint();
|
|
|
|
assert_eq!(self.iter.next(), Some(Token::SeqStart(len)));
|
|
|
|
self.visit_sequence(visitor)
|
|
}
|
|
|
|
fn visit_named_seq<V>(&mut self, name: &str, visitor: V) -> Result<(), ()>
|
|
where V: SeqVisitor
|
|
{
|
|
let (len, _) = visitor.size_hint();
|
|
|
|
assert_eq!(self.iter.next().unwrap(), Token::NamedSeqStart(name, len));
|
|
|
|
self.visit_sequence(visitor)
|
|
}
|
|
|
|
fn visit_enum_seq<V>(&mut self,
|
|
name: &str,
|
|
variant: &str,
|
|
visitor: V) -> Result<(), ()>
|
|
where V: SeqVisitor
|
|
{
|
|
let (len, _) = visitor.size_hint();
|
|
|
|
assert_eq!(self.iter.next().unwrap(), Token::EnumSeqStart(name, variant, len));
|
|
|
|
self.visit_sequence(visitor)
|
|
}
|
|
|
|
fn visit_seq_elt<T>(&mut self, first: bool, value: T) -> Result<(), ()>
|
|
where T: Serialize
|
|
{
|
|
assert_eq!(self.iter.next(), Some(Token::SeqSep(first)));
|
|
value.visit(self)
|
|
}
|
|
|
|
fn visit_map<V>(&mut self, visitor: V) -> Result<(), ()>
|
|
where V: MapVisitor
|
|
{
|
|
let (len, _) = visitor.size_hint();
|
|
|
|
assert_eq!(self.iter.next(), Some(Token::MapStart(len)));
|
|
|
|
self.visit_mapping(visitor)
|
|
}
|
|
|
|
fn visit_named_map<V>(&mut self, name: &str, visitor: V) -> Result<(), ()>
|
|
where V: MapVisitor
|
|
{
|
|
let (len, _) = visitor.size_hint();
|
|
|
|
assert_eq!(self.iter.next().unwrap(), Token::NamedMapStart(name, len));
|
|
|
|
self.visit_mapping(visitor)
|
|
}
|
|
|
|
fn visit_enum_map<V>(&mut self,
|
|
name: &str,
|
|
variant: &str,
|
|
visitor: V) -> Result<(), ()>
|
|
where V: MapVisitor
|
|
{
|
|
let (len, _) = visitor.size_hint();
|
|
|
|
assert_eq!(self.iter.next().unwrap(), Token::EnumMapStart(name, variant, len));
|
|
|
|
self.visit_mapping(visitor)
|
|
}
|
|
|
|
fn visit_map_elt<K, V>(&mut self,
|
|
first: bool,
|
|
key: K,
|
|
value: V) -> Result<(), ()>
|
|
where K: Serialize,
|
|
V: Serialize,
|
|
{
|
|
assert_eq!(self.iter.next(), Some(Token::MapSep(first)));
|
|
|
|
try!(key.visit(self));
|
|
value.visit(self)
|
|
}
|
|
}
|
|
|
|
struct NamedUnit;
|
|
|
|
impl Serialize for NamedUnit {
|
|
fn visit<
|
|
V: Visitor,
|
|
>(&self, visitor: &mut V) -> Result<V::Value, V::Error> {
|
|
visitor.visit_named_unit("NamedUnit")
|
|
}
|
|
}
|
|
|
|
struct NamedSeq(i32, i32, i32);
|
|
|
|
impl Serialize for NamedSeq {
|
|
fn visit<
|
|
V: Visitor,
|
|
>(&self, visitor: &mut V) -> Result<V::Value, V::Error> {
|
|
visitor.visit_named_seq("NamedSeq", NamedSeqVisitor {
|
|
tuple: self,
|
|
state: 0,
|
|
})
|
|
}
|
|
}
|
|
|
|
struct NamedSeqVisitor<'a> {
|
|
tuple: &'a NamedSeq,
|
|
state: u8,
|
|
}
|
|
|
|
impl<'a> SeqVisitor for NamedSeqVisitor<'a> {
|
|
fn visit<
|
|
V: Visitor,
|
|
>(&mut self, visitor: &mut V) -> Result<Option<V::Value>, V::Error> {
|
|
match self.state {
|
|
0 => {
|
|
self.state += 1;
|
|
Ok(Some(try!(visitor.visit_seq_elt(true, &self.tuple.0))))
|
|
}
|
|
1 => {
|
|
self.state += 1;
|
|
Ok(Some(try!(visitor.visit_seq_elt(false, &self.tuple.1))))
|
|
}
|
|
2 => {
|
|
self.state += 1;
|
|
Ok(Some(try!(visitor.visit_seq_elt(false, &self.tuple.2))))
|
|
}
|
|
_ => Ok(None)
|
|
}
|
|
}
|
|
|
|
fn size_hint(&self) -> (usize, Option<usize>) {
|
|
(3, Some(3))
|
|
}
|
|
}
|
|
|
|
enum Enum {
|
|
Unit,
|
|
Seq(i32, i32),
|
|
Map { a: i32, b: i32 },
|
|
}
|
|
|
|
impl Serialize for Enum {
|
|
fn visit<
|
|
V: Visitor,
|
|
>(&self, visitor: &mut V) -> Result<V::Value, V::Error> {
|
|
match *self {
|
|
Enum::Unit => {
|
|
visitor.visit_enum_unit("Enum", "Unit")
|
|
}
|
|
Enum::Seq(ref a, ref b) => {
|
|
visitor.visit_enum_seq("Enum", "Seq", EnumSeqVisitor {
|
|
a: a,
|
|
b: b,
|
|
state: 0,
|
|
})
|
|
}
|
|
Enum::Map { ref a, ref b } => {
|
|
visitor.visit_enum_map("Enum", "Map", EnumMapVisitor {
|
|
a: a,
|
|
b: b,
|
|
state: 0,
|
|
})
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
struct EnumSeqVisitor<'a> {
|
|
a: &'a i32,
|
|
b: &'a i32,
|
|
state: u8,
|
|
}
|
|
|
|
impl<'a> SeqVisitor for EnumSeqVisitor<'a> {
|
|
fn visit<
|
|
V: Visitor,
|
|
>(&mut self, visitor: &mut V) -> Result<Option<V::Value>, V::Error> {
|
|
match self.state {
|
|
0 => {
|
|
self.state += 1;
|
|
Ok(Some(try!(visitor.visit_seq_elt(true, self.a))))
|
|
}
|
|
1 => {
|
|
self.state += 1;
|
|
Ok(Some(try!(visitor.visit_seq_elt(false, self.b))))
|
|
}
|
|
_ => {
|
|
Ok(None)
|
|
}
|
|
}
|
|
}
|
|
|
|
fn size_hint(&self) -> (usize, Option<usize>) {
|
|
(2, Some(2))
|
|
}
|
|
}
|
|
|
|
struct EnumMapVisitor<'a> {
|
|
a: &'a i32,
|
|
b: &'a i32,
|
|
state: u8,
|
|
}
|
|
|
|
impl<'a> MapVisitor for EnumMapVisitor<'a> {
|
|
fn visit<
|
|
V: Visitor,
|
|
>(&mut self, visitor: &mut V) -> Result<Option<V::Value>, V::Error> {
|
|
match self.state {
|
|
0 => {
|
|
self.state += 1;
|
|
Ok(Some(try!(visitor.visit_map_elt(true, "a", self.a))))
|
|
}
|
|
1 => {
|
|
self.state += 1;
|
|
Ok(Some(try!(visitor.visit_map_elt(false, "b", self.b))))
|
|
}
|
|
_ => {
|
|
Ok(None)
|
|
}
|
|
}
|
|
}
|
|
|
|
fn size_hint(&self) -> (usize, Option<usize>) {
|
|
(2, Some(2))
|
|
}
|
|
}
|
|
|
|
macro_rules! btreemap {
|
|
() => {
|
|
BTreeMap::new()
|
|
};
|
|
($($key:expr => $value:expr),+) => {
|
|
{
|
|
let mut map = BTreeMap::new();
|
|
$(map.insert($key, $value);)+
|
|
map
|
|
}
|
|
}
|
|
}
|
|
|
|
macro_rules! declare_test {
|
|
($name:ident { $($value:expr => $tokens:expr,)+ }) => {
|
|
#[test]
|
|
fn $name() {
|
|
$(
|
|
let mut ser = AssertSerializer::new($tokens);
|
|
assert_eq!(ser.visit(&$value), Ok(()));
|
|
)+
|
|
}
|
|
}
|
|
}
|
|
|
|
macro_rules! declare_tests {
|
|
($($name:ident { $($value:expr => $tokens:expr,)+ })+) => {
|
|
$(
|
|
declare_test!($name { $($value => $tokens,)+ });
|
|
)+
|
|
}
|
|
}
|
|
|
|
declare_tests! {
|
|
test_unit {
|
|
() => vec![Token::Unit],
|
|
}
|
|
test_bool {
|
|
true => vec![Token::Bool(true)],
|
|
false => vec![Token::Bool(false)],
|
|
}
|
|
test_isizes {
|
|
0is => vec![Token::Isize(0)],
|
|
0i8 => vec![Token::I8(0)],
|
|
0i16 => vec![Token::I16(0)],
|
|
0i32 => vec![Token::I32(0)],
|
|
0i64 => vec![Token::I64(0)],
|
|
}
|
|
test_usizes {
|
|
0us => vec![Token::Usize(0)],
|
|
0u8 => vec![Token::U8(0)],
|
|
0u16 => vec![Token::U16(0)],
|
|
0u32 => vec![Token::U32(0)],
|
|
0u64 => vec![Token::U64(0)],
|
|
}
|
|
test_floats {
|
|
0f32 => vec![Token::F32(0.)],
|
|
0f64 => vec![Token::F64(0.)],
|
|
}
|
|
test_char {
|
|
'a' => vec![Token::Char('a')],
|
|
}
|
|
test_str {
|
|
"abc" => vec![Token::Str("abc")],
|
|
"abc".to_string() => vec![Token::Str("abc")],
|
|
}
|
|
test_option {
|
|
None::<i32> => vec![Token::Option(false)],
|
|
Some(1) => vec![
|
|
Token::Option(true),
|
|
Token::I32(1),
|
|
],
|
|
}
|
|
test_slice {
|
|
&[0][..0] => vec![
|
|
Token::SeqStart(0),
|
|
Token::SeqEnd,
|
|
],
|
|
&[1, 2, 3][] => vec![
|
|
Token::SeqStart(3),
|
|
Token::SeqSep(true),
|
|
Token::I32(1),
|
|
|
|
Token::SeqSep(false),
|
|
Token::I32(2),
|
|
|
|
Token::SeqSep(false),
|
|
Token::I32(3),
|
|
Token::SeqEnd,
|
|
],
|
|
}
|
|
test_vec {
|
|
Vec::<isize>::new() => vec![
|
|
Token::SeqStart(0),
|
|
Token::SeqEnd,
|
|
],
|
|
vec![vec![], vec![1], vec![2, 3]] => vec![
|
|
Token::SeqStart(3),
|
|
Token::SeqSep(true),
|
|
Token::SeqStart(0),
|
|
Token::SeqEnd,
|
|
|
|
Token::SeqSep(false),
|
|
Token::SeqStart(1),
|
|
Token::SeqSep(true),
|
|
Token::I32(1),
|
|
Token::SeqEnd,
|
|
|
|
Token::SeqSep(false),
|
|
Token::SeqStart(2),
|
|
Token::SeqSep(true),
|
|
Token::I32(2),
|
|
|
|
Token::SeqSep(false),
|
|
Token::I32(3),
|
|
Token::SeqEnd,
|
|
Token::SeqEnd,
|
|
],
|
|
}
|
|
test_tuple {
|
|
(1,) => vec![
|
|
Token::SeqStart(1),
|
|
Token::SeqSep(true),
|
|
Token::I32(1),
|
|
Token::SeqEnd,
|
|
],
|
|
(1, 2, 3) => vec![
|
|
Token::SeqStart(3),
|
|
Token::SeqSep(true),
|
|
Token::I32(1),
|
|
|
|
Token::SeqSep(false),
|
|
Token::I32(2),
|
|
|
|
Token::SeqSep(false),
|
|
Token::I32(3),
|
|
Token::SeqEnd,
|
|
],
|
|
}
|
|
test_btreemap {
|
|
btreemap![1 => 2] => vec![
|
|
Token::MapStart(1),
|
|
Token::MapSep(true),
|
|
Token::I32(1),
|
|
Token::I32(2),
|
|
Token::MapEnd,
|
|
],
|
|
btreemap![1 => 2, 3 => 4] => vec![
|
|
Token::MapStart(2),
|
|
Token::MapSep(true),
|
|
Token::I32(1),
|
|
Token::I32(2),
|
|
|
|
Token::MapSep(false),
|
|
Token::I32(3),
|
|
Token::I32(4),
|
|
Token::MapEnd,
|
|
],
|
|
btreemap![1 => btreemap![], 2 => btreemap![3 => 4, 5 => 6]] => vec![
|
|
Token::MapStart(2),
|
|
Token::MapSep(true),
|
|
Token::I32(1),
|
|
Token::MapStart(0),
|
|
Token::MapEnd,
|
|
|
|
Token::MapSep(false),
|
|
Token::I32(2),
|
|
Token::MapStart(2),
|
|
Token::MapSep(true),
|
|
Token::I32(3),
|
|
Token::I32(4),
|
|
|
|
Token::MapSep(false),
|
|
Token::I32(5),
|
|
Token::I32(6),
|
|
Token::MapEnd,
|
|
Token::MapEnd,
|
|
],
|
|
}
|
|
test_named_unit {
|
|
NamedUnit => vec![Token::NamedUnit("NamedUnit")],
|
|
}
|
|
test_named_seq {
|
|
NamedSeq(1, 2, 3) => vec![
|
|
Token::NamedSeqStart("NamedSeq", 3),
|
|
Token::SeqSep(true),
|
|
Token::I32(1),
|
|
|
|
Token::SeqSep(false),
|
|
Token::I32(2),
|
|
|
|
Token::SeqSep(false),
|
|
Token::I32(3),
|
|
Token::SeqEnd,
|
|
],
|
|
}
|
|
test_enum {
|
|
Enum::Unit => vec![Token::EnumUnit("Enum", "Unit")],
|
|
Enum::Seq(1, 2) => vec![
|
|
Token::EnumSeqStart("Enum", "Seq", 2),
|
|
Token::SeqSep(true),
|
|
Token::I32(1),
|
|
|
|
Token::SeqSep(false),
|
|
Token::I32(2),
|
|
Token::SeqEnd,
|
|
],
|
|
Enum::Map { a: 1, b: 2 } => vec![
|
|
Token::EnumMapStart("Enum", "Map", 2),
|
|
Token::MapSep(true),
|
|
Token::Str("a"),
|
|
Token::I32(1),
|
|
|
|
Token::MapSep(false),
|
|
Token::Str("b"),
|
|
Token::I32(2),
|
|
Token::MapEnd,
|
|
],
|
|
}
|
|
}
|
|
}
|