diff options
Diffstat (limited to '')
-rw-r--r-- | vendor/serde/src/private/ser.rs | 1310 |
1 files changed, 1310 insertions, 0 deletions
diff --git a/vendor/serde/src/private/ser.rs b/vendor/serde/src/private/ser.rs new file mode 100644 index 000000000..6ee999389 --- /dev/null +++ b/vendor/serde/src/private/ser.rs @@ -0,0 +1,1310 @@ +use lib::*; + +use ser::{self, Impossible, Serialize, SerializeMap, SerializeStruct, Serializer}; + +#[cfg(any(feature = "std", feature = "alloc"))] +use self::content::{ + Content, ContentSerializer, SerializeStructVariantAsMapValue, SerializeTupleVariantAsMapValue, +}; + +/// Used to check that serde(getter) attributes return the expected type. +/// Not public API. +pub fn constrain<T: ?Sized>(t: &T) -> &T { + t +} + +/// Not public API. +pub fn serialize_tagged_newtype<S, T>( + serializer: S, + type_ident: &'static str, + variant_ident: &'static str, + tag: &'static str, + variant_name: &'static str, + value: &T, +) -> Result<S::Ok, S::Error> +where + S: Serializer, + T: Serialize, +{ + value.serialize(TaggedSerializer { + type_ident: type_ident, + variant_ident: variant_ident, + tag: tag, + variant_name: variant_name, + delegate: serializer, + }) +} + +struct TaggedSerializer<S> { + type_ident: &'static str, + variant_ident: &'static str, + tag: &'static str, + variant_name: &'static str, + delegate: S, +} + +enum Unsupported { + Boolean, + Integer, + Float, + Char, + String, + ByteArray, + Optional, + Unit, + #[cfg(any(feature = "std", feature = "alloc"))] + UnitStruct, + Sequence, + Tuple, + TupleStruct, + Enum, +} + +impl Display for Unsupported { + fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result { + match *self { + Unsupported::Boolean => formatter.write_str("a boolean"), + Unsupported::Integer => formatter.write_str("an integer"), + Unsupported::Float => formatter.write_str("a float"), + Unsupported::Char => formatter.write_str("a char"), + Unsupported::String => formatter.write_str("a string"), + Unsupported::ByteArray => formatter.write_str("a byte array"), + Unsupported::Optional => formatter.write_str("an optional"), + Unsupported::Unit => formatter.write_str("unit"), + #[cfg(any(feature = "std", feature = "alloc"))] + Unsupported::UnitStruct => formatter.write_str("unit struct"), + Unsupported::Sequence => formatter.write_str("a sequence"), + Unsupported::Tuple => formatter.write_str("a tuple"), + Unsupported::TupleStruct => formatter.write_str("a tuple struct"), + Unsupported::Enum => formatter.write_str("an enum"), + } + } +} + +impl<S> TaggedSerializer<S> +where + S: Serializer, +{ + fn bad_type(self, what: Unsupported) -> S::Error { + ser::Error::custom(format_args!( + "cannot serialize tagged newtype variant {}::{} containing {}", + self.type_ident, self.variant_ident, what + )) + } +} + +impl<S> Serializer for TaggedSerializer<S> +where + S: Serializer, +{ + type Ok = S::Ok; + type Error = S::Error; + + type SerializeSeq = Impossible<S::Ok, S::Error>; + type SerializeTuple = Impossible<S::Ok, S::Error>; + type SerializeTupleStruct = Impossible<S::Ok, S::Error>; + type SerializeMap = S::SerializeMap; + type SerializeStruct = S::SerializeStruct; + + #[cfg(not(any(feature = "std", feature = "alloc")))] + type SerializeTupleVariant = Impossible<S::Ok, S::Error>; + #[cfg(any(feature = "std", feature = "alloc"))] + type SerializeTupleVariant = SerializeTupleVariantAsMapValue<S::SerializeMap>; + + #[cfg(not(any(feature = "std", feature = "alloc")))] + type SerializeStructVariant = Impossible<S::Ok, S::Error>; + #[cfg(any(feature = "std", feature = "alloc"))] + type SerializeStructVariant = SerializeStructVariantAsMapValue<S::SerializeMap>; + + fn serialize_bool(self, _: bool) -> Result<Self::Ok, Self::Error> { + Err(self.bad_type(Unsupported::Boolean)) + } + + fn serialize_i8(self, _: i8) -> Result<Self::Ok, Self::Error> { + Err(self.bad_type(Unsupported::Integer)) + } + + fn serialize_i16(self, _: i16) -> Result<Self::Ok, Self::Error> { + Err(self.bad_type(Unsupported::Integer)) + } + + fn serialize_i32(self, _: i32) -> Result<Self::Ok, Self::Error> { + Err(self.bad_type(Unsupported::Integer)) + } + + fn serialize_i64(self, _: i64) -> Result<Self::Ok, Self::Error> { + Err(self.bad_type(Unsupported::Integer)) + } + + fn serialize_u8(self, _: u8) -> Result<Self::Ok, Self::Error> { + Err(self.bad_type(Unsupported::Integer)) + } + + fn serialize_u16(self, _: u16) -> Result<Self::Ok, Self::Error> { + Err(self.bad_type(Unsupported::Integer)) + } + + fn serialize_u32(self, _: u32) -> Result<Self::Ok, Self::Error> { + Err(self.bad_type(Unsupported::Integer)) + } + + fn serialize_u64(self, _: u64) -> Result<Self::Ok, Self::Error> { + Err(self.bad_type(Unsupported::Integer)) + } + + fn serialize_f32(self, _: f32) -> Result<Self::Ok, Self::Error> { + Err(self.bad_type(Unsupported::Float)) + } + + fn serialize_f64(self, _: f64) -> Result<Self::Ok, Self::Error> { + Err(self.bad_type(Unsupported::Float)) + } + + fn serialize_char(self, _: char) -> Result<Self::Ok, Self::Error> { + Err(self.bad_type(Unsupported::Char)) + } + + fn serialize_str(self, _: &str) -> Result<Self::Ok, Self::Error> { + Err(self.bad_type(Unsupported::String)) + } + + fn serialize_bytes(self, _: &[u8]) -> Result<Self::Ok, Self::Error> { + Err(self.bad_type(Unsupported::ByteArray)) + } + + fn serialize_none(self) -> Result<Self::Ok, Self::Error> { + Err(self.bad_type(Unsupported::Optional)) + } + + fn serialize_some<T: ?Sized>(self, _: &T) -> Result<Self::Ok, Self::Error> + where + T: Serialize, + { + Err(self.bad_type(Unsupported::Optional)) + } + + fn serialize_unit(self) -> Result<Self::Ok, Self::Error> { + Err(self.bad_type(Unsupported::Unit)) + } + + fn serialize_unit_struct(self, _: &'static str) -> Result<Self::Ok, Self::Error> { + let mut map = try!(self.delegate.serialize_map(Some(1))); + try!(map.serialize_entry(self.tag, self.variant_name)); + map.end() + } + + fn serialize_unit_variant( + self, + _: &'static str, + _: u32, + inner_variant: &'static str, + ) -> Result<Self::Ok, Self::Error> { + let mut map = try!(self.delegate.serialize_map(Some(2))); + try!(map.serialize_entry(self.tag, self.variant_name)); + try!(map.serialize_entry(inner_variant, &())); + map.end() + } + + fn serialize_newtype_struct<T: ?Sized>( + self, + _: &'static str, + value: &T, + ) -> Result<Self::Ok, Self::Error> + where + T: Serialize, + { + value.serialize(self) + } + + fn serialize_newtype_variant<T: ?Sized>( + self, + _: &'static str, + _: u32, + inner_variant: &'static str, + inner_value: &T, + ) -> Result<Self::Ok, Self::Error> + where + T: Serialize, + { + let mut map = try!(self.delegate.serialize_map(Some(2))); + try!(map.serialize_entry(self.tag, self.variant_name)); + try!(map.serialize_entry(inner_variant, inner_value)); + map.end() + } + + fn serialize_seq(self, _: Option<usize>) -> Result<Self::SerializeSeq, Self::Error> { + Err(self.bad_type(Unsupported::Sequence)) + } + + fn serialize_tuple(self, _: usize) -> Result<Self::SerializeTuple, Self::Error> { + Err(self.bad_type(Unsupported::Tuple)) + } + + fn serialize_tuple_struct( + self, + _: &'static str, + _: usize, + ) -> Result<Self::SerializeTupleStruct, Self::Error> { + Err(self.bad_type(Unsupported::TupleStruct)) + } + + #[cfg(not(any(feature = "std", feature = "alloc")))] + fn serialize_tuple_variant( + self, + _: &'static str, + _: u32, + _: &'static str, + _: usize, + ) -> Result<Self::SerializeTupleVariant, Self::Error> { + // Lack of push-based serialization means we need to buffer the content + // of the tuple variant, so it requires std. + Err(self.bad_type(Unsupported::Enum)) + } + + #[cfg(any(feature = "std", feature = "alloc"))] + fn serialize_tuple_variant( + self, + _: &'static str, + _: u32, + inner_variant: &'static str, + len: usize, + ) -> Result<Self::SerializeTupleVariant, Self::Error> { + let mut map = try!(self.delegate.serialize_map(Some(2))); + try!(map.serialize_entry(self.tag, self.variant_name)); + try!(map.serialize_key(inner_variant)); + Ok(SerializeTupleVariantAsMapValue::new( + map, + inner_variant, + len, + )) + } + + fn serialize_map(self, len: Option<usize>) -> Result<Self::SerializeMap, Self::Error> { + let mut map = try!(self.delegate.serialize_map(len.map(|len| len + 1))); + try!(map.serialize_entry(self.tag, self.variant_name)); + Ok(map) + } + + fn serialize_struct( + self, + name: &'static str, + len: usize, + ) -> Result<Self::SerializeStruct, Self::Error> { + let mut state = try!(self.delegate.serialize_struct(name, len + 1)); + try!(state.serialize_field(self.tag, self.variant_name)); + Ok(state) + } + + #[cfg(not(any(feature = "std", feature = "alloc")))] + fn serialize_struct_variant( + self, + _: &'static str, + _: u32, + _: &'static str, + _: usize, + ) -> Result<Self::SerializeStructVariant, Self::Error> { + // Lack of push-based serialization means we need to buffer the content + // of the struct variant, so it requires std. + Err(self.bad_type(Unsupported::Enum)) + } + + #[cfg(any(feature = "std", feature = "alloc"))] + fn serialize_struct_variant( + self, + _: &'static str, + _: u32, + inner_variant: &'static str, + len: usize, + ) -> Result<Self::SerializeStructVariant, Self::Error> { + let mut map = try!(self.delegate.serialize_map(Some(2))); + try!(map.serialize_entry(self.tag, self.variant_name)); + try!(map.serialize_key(inner_variant)); + Ok(SerializeStructVariantAsMapValue::new( + map, + inner_variant, + len, + )) + } + + #[cfg(not(any(feature = "std", feature = "alloc")))] + fn collect_str<T: ?Sized>(self, _: &T) -> Result<Self::Ok, Self::Error> + where + T: Display, + { + Err(self.bad_type(Unsupported::String)) + } +} + +#[cfg(any(feature = "std", feature = "alloc"))] +mod content { + use lib::*; + + use ser::{self, Serialize, Serializer}; + + pub struct SerializeTupleVariantAsMapValue<M> { + map: M, + name: &'static str, + fields: Vec<Content>, + } + + impl<M> SerializeTupleVariantAsMapValue<M> { + pub fn new(map: M, name: &'static str, len: usize) -> Self { + SerializeTupleVariantAsMapValue { + map: map, + name: name, + fields: Vec::with_capacity(len), + } + } + } + + impl<M> ser::SerializeTupleVariant for SerializeTupleVariantAsMapValue<M> + where + M: ser::SerializeMap, + { + type Ok = M::Ok; + type Error = M::Error; + + fn serialize_field<T: ?Sized>(&mut self, value: &T) -> Result<(), M::Error> + where + T: Serialize, + { + let value = try!(value.serialize(ContentSerializer::<M::Error>::new())); + self.fields.push(value); + Ok(()) + } + + fn end(mut self) -> Result<M::Ok, M::Error> { + try!(self + .map + .serialize_value(&Content::TupleStruct(self.name, self.fields))); + self.map.end() + } + } + + pub struct SerializeStructVariantAsMapValue<M> { + map: M, + name: &'static str, + fields: Vec<(&'static str, Content)>, + } + + impl<M> SerializeStructVariantAsMapValue<M> { + pub fn new(map: M, name: &'static str, len: usize) -> Self { + SerializeStructVariantAsMapValue { + map: map, + name: name, + fields: Vec::with_capacity(len), + } + } + } + + impl<M> ser::SerializeStructVariant for SerializeStructVariantAsMapValue<M> + where + M: ser::SerializeMap, + { + type Ok = M::Ok; + type Error = M::Error; + + fn serialize_field<T: ?Sized>( + &mut self, + key: &'static str, + value: &T, + ) -> Result<(), M::Error> + where + T: Serialize, + { + let value = try!(value.serialize(ContentSerializer::<M::Error>::new())); + self.fields.push((key, value)); + Ok(()) + } + + fn end(mut self) -> Result<M::Ok, M::Error> { + try!(self + .map + .serialize_value(&Content::Struct(self.name, self.fields))); + self.map.end() + } + } + + pub enum Content { + Bool(bool), + + U8(u8), + U16(u16), + U32(u32), + U64(u64), + + I8(i8), + I16(i16), + I32(i32), + I64(i64), + + F32(f32), + F64(f64), + + Char(char), + String(String), + Bytes(Vec<u8>), + + None, + Some(Box<Content>), + + Unit, + UnitStruct(&'static str), + UnitVariant(&'static str, u32, &'static str), + NewtypeStruct(&'static str, Box<Content>), + NewtypeVariant(&'static str, u32, &'static str, Box<Content>), + + Seq(Vec<Content>), + Tuple(Vec<Content>), + TupleStruct(&'static str, Vec<Content>), + TupleVariant(&'static str, u32, &'static str, Vec<Content>), + Map(Vec<(Content, Content)>), + Struct(&'static str, Vec<(&'static str, Content)>), + StructVariant( + &'static str, + u32, + &'static str, + Vec<(&'static str, Content)>, + ), + } + + impl Serialize for Content { + fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> + where + S: Serializer, + { + match *self { + Content::Bool(b) => serializer.serialize_bool(b), + Content::U8(u) => serializer.serialize_u8(u), + Content::U16(u) => serializer.serialize_u16(u), + Content::U32(u) => serializer.serialize_u32(u), + Content::U64(u) => serializer.serialize_u64(u), + Content::I8(i) => serializer.serialize_i8(i), + Content::I16(i) => serializer.serialize_i16(i), + Content::I32(i) => serializer.serialize_i32(i), + Content::I64(i) => serializer.serialize_i64(i), + Content::F32(f) => serializer.serialize_f32(f), + Content::F64(f) => serializer.serialize_f64(f), + Content::Char(c) => serializer.serialize_char(c), + Content::String(ref s) => serializer.serialize_str(s), + Content::Bytes(ref b) => serializer.serialize_bytes(b), + Content::None => serializer.serialize_none(), + Content::Some(ref c) => serializer.serialize_some(&**c), + Content::Unit => serializer.serialize_unit(), + Content::UnitStruct(n) => serializer.serialize_unit_struct(n), + Content::UnitVariant(n, i, v) => serializer.serialize_unit_variant(n, i, v), + Content::NewtypeStruct(n, ref c) => serializer.serialize_newtype_struct(n, &**c), + Content::NewtypeVariant(n, i, v, ref c) => { + serializer.serialize_newtype_variant(n, i, v, &**c) + } + Content::Seq(ref elements) => elements.serialize(serializer), + Content::Tuple(ref elements) => { + use ser::SerializeTuple; + let mut tuple = try!(serializer.serialize_tuple(elements.len())); + for e in elements { + try!(tuple.serialize_element(e)); + } + tuple.end() + } + Content::TupleStruct(n, ref fields) => { + use ser::SerializeTupleStruct; + let mut ts = try!(serializer.serialize_tuple_struct(n, fields.len())); + for f in fields { + try!(ts.serialize_field(f)); + } + ts.end() + } + Content::TupleVariant(n, i, v, ref fields) => { + use ser::SerializeTupleVariant; + let mut tv = try!(serializer.serialize_tuple_variant(n, i, v, fields.len())); + for f in fields { + try!(tv.serialize_field(f)); + } + tv.end() + } + Content::Map(ref entries) => { + use ser::SerializeMap; + let mut map = try!(serializer.serialize_map(Some(entries.len()))); + for &(ref k, ref v) in entries { + try!(map.serialize_entry(k, v)); + } + map.end() + } + Content::Struct(n, ref fields) => { + use ser::SerializeStruct; + let mut s = try!(serializer.serialize_struct(n, fields.len())); + for &(k, ref v) in fields { + try!(s.serialize_field(k, v)); + } + s.end() + } + Content::StructVariant(n, i, v, ref fields) => { + use ser::SerializeStructVariant; + let mut sv = try!(serializer.serialize_struct_variant(n, i, v, fields.len())); + for &(k, ref v) in fields { + try!(sv.serialize_field(k, v)); + } + sv.end() + } + } + } + } + + pub struct ContentSerializer<E> { + error: PhantomData<E>, + } + + impl<E> ContentSerializer<E> { + pub fn new() -> Self { + ContentSerializer { error: PhantomData } + } + } + + impl<E> Serializer for ContentSerializer<E> + where + E: ser::Error, + { + type Ok = Content; + type Error = E; + + type SerializeSeq = SerializeSeq<E>; + type SerializeTuple = SerializeTuple<E>; + type SerializeTupleStruct = SerializeTupleStruct<E>; + type SerializeTupleVariant = SerializeTupleVariant<E>; + type SerializeMap = SerializeMap<E>; + type SerializeStruct = SerializeStruct<E>; + type SerializeStructVariant = SerializeStructVariant<E>; + + fn serialize_bool(self, v: bool) -> Result<Content, E> { + Ok(Content::Bool(v)) + } + + fn serialize_i8(self, v: i8) -> Result<Content, E> { + Ok(Content::I8(v)) + } + + fn serialize_i16(self, v: i16) -> Result<Content, E> { + Ok(Content::I16(v)) + } + + fn serialize_i32(self, v: i32) -> Result<Content, E> { + Ok(Content::I32(v)) + } + + fn serialize_i64(self, v: i64) -> Result<Content, E> { + Ok(Content::I64(v)) + } + + fn serialize_u8(self, v: u8) -> Result<Content, E> { + Ok(Content::U8(v)) + } + + fn serialize_u16(self, v: u16) -> Result<Content, E> { + Ok(Content::U16(v)) + } + + fn serialize_u32(self, v: u32) -> Result<Content, E> { + Ok(Content::U32(v)) + } + + fn serialize_u64(self, v: u64) -> Result<Content, E> { + Ok(Content::U64(v)) + } + + fn serialize_f32(self, v: f32) -> Result<Content, E> { + Ok(Content::F32(v)) + } + + fn serialize_f64(self, v: f64) -> Result<Content, E> { + Ok(Content::F64(v)) + } + + fn serialize_char(self, v: char) -> Result<Content, E> { + Ok(Content::Char(v)) + } + + fn serialize_str(self, value: &str) -> Result<Content, E> { + Ok(Content::String(value.to_owned())) + } + + fn serialize_bytes(self, value: &[u8]) -> Result<Content, E> { + Ok(Content::Bytes(value.to_owned())) + } + + fn serialize_none(self) -> Result<Content, E> { + Ok(Content::None) + } + + fn serialize_some<T: ?Sized>(self, value: &T) -> Result<Content, E> + where + T: Serialize, + { + Ok(Content::Some(Box::new(try!(value.serialize(self))))) + } + + fn serialize_unit(self) -> Result<Content, E> { + Ok(Content::Unit) + } + + fn serialize_unit_struct(self, name: &'static str) -> Result<Content, E> { + Ok(Content::UnitStruct(name)) + } + + fn serialize_unit_variant( + self, + name: &'static str, + variant_index: u32, + variant: &'static str, + ) -> Result<Content, E> { + Ok(Content::UnitVariant(name, variant_index, variant)) + } + + fn serialize_newtype_struct<T: ?Sized>( + self, + name: &'static str, + value: &T, + ) -> Result<Content, E> + where + T: Serialize, + { + Ok(Content::NewtypeStruct( + name, + Box::new(try!(value.serialize(self))), + )) + } + + fn serialize_newtype_variant<T: ?Sized>( + self, + name: &'static str, + variant_index: u32, + variant: &'static str, + value: &T, + ) -> Result<Content, E> + where + T: Serialize, + { + Ok(Content::NewtypeVariant( + name, + variant_index, + variant, + Box::new(try!(value.serialize(self))), + )) + } + + fn serialize_seq(self, len: Option<usize>) -> Result<Self::SerializeSeq, E> { + Ok(SerializeSeq { + elements: Vec::with_capacity(len.unwrap_or(0)), + error: PhantomData, + }) + } + + fn serialize_tuple(self, len: usize) -> Result<Self::SerializeTuple, E> { + Ok(SerializeTuple { + elements: Vec::with_capacity(len), + error: PhantomData, + }) + } + + fn serialize_tuple_struct( + self, + name: &'static str, + len: usize, + ) -> Result<Self::SerializeTupleStruct, E> { + Ok(SerializeTupleStruct { + name: name, + fields: Vec::with_capacity(len), + error: PhantomData, + }) + } + + fn serialize_tuple_variant( + self, + name: &'static str, + variant_index: u32, + variant: &'static str, + len: usize, + ) -> Result<Self::SerializeTupleVariant, E> { + Ok(SerializeTupleVariant { + name: name, + variant_index: variant_index, + variant: variant, + fields: Vec::with_capacity(len), + error: PhantomData, + }) + } + + fn serialize_map(self, len: Option<usize>) -> Result<Self::SerializeMap, E> { + Ok(SerializeMap { + entries: Vec::with_capacity(len.unwrap_or(0)), + key: None, + error: PhantomData, + }) + } + + fn serialize_struct( + self, + name: &'static str, + len: usize, + ) -> Result<Self::SerializeStruct, E> { + Ok(SerializeStruct { + name: name, + fields: Vec::with_capacity(len), + error: PhantomData, + }) + } + + fn serialize_struct_variant( + self, + name: &'static str, + variant_index: u32, + variant: &'static str, + len: usize, + ) -> Result<Self::SerializeStructVariant, E> { + Ok(SerializeStructVariant { + name: name, + variant_index: variant_index, + variant: variant, + fields: Vec::with_capacity(len), + error: PhantomData, + }) + } + } + + pub struct SerializeSeq<E> { + elements: Vec<Content>, + error: PhantomData<E>, + } + + impl<E> ser::SerializeSeq for SerializeSeq<E> + where + E: ser::Error, + { + type Ok = Content; + type Error = E; + + fn serialize_element<T: ?Sized>(&mut self, value: &T) -> Result<(), E> + where + T: Serialize, + { + let value = try!(value.serialize(ContentSerializer::<E>::new())); + self.elements.push(value); + Ok(()) + } + + fn end(self) -> Result<Content, E> { + Ok(Content::Seq(self.elements)) + } + } + + pub struct SerializeTuple<E> { + elements: Vec<Content>, + error: PhantomData<E>, + } + + impl<E> ser::SerializeTuple for SerializeTuple<E> + where + E: ser::Error, + { + type Ok = Content; + type Error = E; + + fn serialize_element<T: ?Sized>(&mut self, value: &T) -> Result<(), E> + where + T: Serialize, + { + let value = try!(value.serialize(ContentSerializer::<E>::new())); + self.elements.push(value); + Ok(()) + } + + fn end(self) -> Result<Content, E> { + Ok(Content::Tuple(self.elements)) + } + } + + pub struct SerializeTupleStruct<E> { + name: &'static str, + fields: Vec<Content>, + error: PhantomData<E>, + } + + impl<E> ser::SerializeTupleStruct for SerializeTupleStruct<E> + where + E: ser::Error, + { + type Ok = Content; + type Error = E; + + fn serialize_field<T: ?Sized>(&mut self, value: &T) -> Result<(), E> + where + T: Serialize, + { + let value = try!(value.serialize(ContentSerializer::<E>::new())); + self.fields.push(value); + Ok(()) + } + + fn end(self) -> Result<Content, E> { + Ok(Content::TupleStruct(self.name, self.fields)) + } + } + + pub struct SerializeTupleVariant<E> { + name: &'static str, + variant_index: u32, + variant: &'static str, + fields: Vec<Content>, + error: PhantomData<E>, + } + + impl<E> ser::SerializeTupleVariant for SerializeTupleVariant<E> + where + E: ser::Error, + { + type Ok = Content; + type Error = E; + + fn serialize_field<T: ?Sized>(&mut self, value: &T) -> Result<(), E> + where + T: Serialize, + { + let value = try!(value.serialize(ContentSerializer::<E>::new())); + self.fields.push(value); + Ok(()) + } + + fn end(self) -> Result<Content, E> { + Ok(Content::TupleVariant( + self.name, + self.variant_index, + self.variant, + self.fields, + )) + } + } + + pub struct SerializeMap<E> { + entries: Vec<(Content, Content)>, + key: Option<Content>, + error: PhantomData<E>, + } + + impl<E> ser::SerializeMap for SerializeMap<E> + where + E: ser::Error, + { + type Ok = Content; + type Error = E; + + fn serialize_key<T: ?Sized>(&mut self, key: &T) -> Result<(), E> + where + T: Serialize, + { + let key = try!(key.serialize(ContentSerializer::<E>::new())); + self.key = Some(key); + Ok(()) + } + + fn serialize_value<T: ?Sized>(&mut self, value: &T) -> Result<(), E> + where + T: Serialize, + { + let key = self + .key + .take() + .expect("serialize_value called before serialize_key"); + let value = try!(value.serialize(ContentSerializer::<E>::new())); + self.entries.push((key, value)); + Ok(()) + } + + fn end(self) -> Result<Content, E> { + Ok(Content::Map(self.entries)) + } + + fn serialize_entry<K: ?Sized, V: ?Sized>(&mut self, key: &K, value: &V) -> Result<(), E> + where + K: Serialize, + V: Serialize, + { + let key = try!(key.serialize(ContentSerializer::<E>::new())); + let value = try!(value.serialize(ContentSerializer::<E>::new())); + self.entries.push((key, value)); + Ok(()) + } + } + + pub struct SerializeStruct<E> { + name: &'static str, + fields: Vec<(&'static str, Content)>, + error: PhantomData<E>, + } + + impl<E> ser::SerializeStruct for SerializeStruct<E> + where + E: ser::Error, + { + type Ok = Content; + type Error = E; + + fn serialize_field<T: ?Sized>(&mut self, key: &'static str, value: &T) -> Result<(), E> + where + T: Serialize, + { + let value = try!(value.serialize(ContentSerializer::<E>::new())); + self.fields.push((key, value)); + Ok(()) + } + + fn end(self) -> Result<Content, E> { + Ok(Content::Struct(self.name, self.fields)) + } + } + + pub struct SerializeStructVariant<E> { + name: &'static str, + variant_index: u32, + variant: &'static str, + fields: Vec<(&'static str, Content)>, + error: PhantomData<E>, + } + + impl<E> ser::SerializeStructVariant for SerializeStructVariant<E> + where + E: ser::Error, + { + type Ok = Content; + type Error = E; + + fn serialize_field<T: ?Sized>(&mut self, key: &'static str, value: &T) -> Result<(), E> + where + T: Serialize, + { + let value = try!(value.serialize(ContentSerializer::<E>::new())); + self.fields.push((key, value)); + Ok(()) + } + + fn end(self) -> Result<Content, E> { + Ok(Content::StructVariant( + self.name, + self.variant_index, + self.variant, + self.fields, + )) + } + } +} + +#[cfg(any(feature = "std", feature = "alloc"))] +pub struct FlatMapSerializer<'a, M: 'a>(pub &'a mut M); + +#[cfg(any(feature = "std", feature = "alloc"))] +impl<'a, M> FlatMapSerializer<'a, M> +where + M: SerializeMap + 'a, +{ + fn bad_type(what: Unsupported) -> M::Error { + ser::Error::custom(format_args!( + "can only flatten structs and maps (got {})", + what + )) + } +} + +#[cfg(any(feature = "std", feature = "alloc"))] +impl<'a, M> Serializer for FlatMapSerializer<'a, M> +where + M: SerializeMap + 'a, +{ + type Ok = (); + type Error = M::Error; + + type SerializeSeq = Impossible<Self::Ok, M::Error>; + type SerializeTuple = Impossible<Self::Ok, M::Error>; + type SerializeTupleStruct = Impossible<Self::Ok, M::Error>; + type SerializeMap = FlatMapSerializeMap<'a, M>; + type SerializeStruct = FlatMapSerializeStruct<'a, M>; + type SerializeTupleVariant = Impossible<Self::Ok, M::Error>; + type SerializeStructVariant = FlatMapSerializeStructVariantAsMapValue<'a, M>; + + fn serialize_bool(self, _: bool) -> Result<Self::Ok, Self::Error> { + Err(Self::bad_type(Unsupported::Boolean)) + } + + fn serialize_i8(self, _: i8) -> Result<Self::Ok, Self::Error> { + Err(Self::bad_type(Unsupported::Integer)) + } + + fn serialize_i16(self, _: i16) -> Result<Self::Ok, Self::Error> { + Err(Self::bad_type(Unsupported::Integer)) + } + + fn serialize_i32(self, _: i32) -> Result<Self::Ok, Self::Error> { + Err(Self::bad_type(Unsupported::Integer)) + } + + fn serialize_i64(self, _: i64) -> Result<Self::Ok, Self::Error> { + Err(Self::bad_type(Unsupported::Integer)) + } + + fn serialize_u8(self, _: u8) -> Result<Self::Ok, Self::Error> { + Err(Self::bad_type(Unsupported::Integer)) + } + + fn serialize_u16(self, _: u16) -> Result<Self::Ok, Self::Error> { + Err(Self::bad_type(Unsupported::Integer)) + } + + fn serialize_u32(self, _: u32) -> Result<Self::Ok, Self::Error> { + Err(Self::bad_type(Unsupported::Integer)) + } + + fn serialize_u64(self, _: u64) -> Result<Self::Ok, Self::Error> { + Err(Self::bad_type(Unsupported::Integer)) + } + + fn serialize_f32(self, _: f32) -> Result<Self::Ok, Self::Error> { + Err(Self::bad_type(Unsupported::Float)) + } + + fn serialize_f64(self, _: f64) -> Result<Self::Ok, Self::Error> { + Err(Self::bad_type(Unsupported::Float)) + } + + fn serialize_char(self, _: char) -> Result<Self::Ok, Self::Error> { + Err(Self::bad_type(Unsupported::Char)) + } + + fn serialize_str(self, _: &str) -> Result<Self::Ok, Self::Error> { + Err(Self::bad_type(Unsupported::String)) + } + + fn serialize_bytes(self, _: &[u8]) -> Result<Self::Ok, Self::Error> { + Err(Self::bad_type(Unsupported::ByteArray)) + } + + fn serialize_none(self) -> Result<Self::Ok, Self::Error> { + Ok(()) + } + + fn serialize_some<T: ?Sized>(self, value: &T) -> Result<Self::Ok, Self::Error> + where + T: Serialize, + { + value.serialize(self) + } + + fn serialize_unit(self) -> Result<Self::Ok, Self::Error> { + Ok(()) + } + + fn serialize_unit_struct(self, _: &'static str) -> Result<Self::Ok, Self::Error> { + Err(Self::bad_type(Unsupported::UnitStruct)) + } + + fn serialize_unit_variant( + self, + _: &'static str, + _: u32, + _: &'static str, + ) -> Result<Self::Ok, Self::Error> { + Err(Self::bad_type(Unsupported::Enum)) + } + + fn serialize_newtype_struct<T: ?Sized>( + self, + _: &'static str, + value: &T, + ) -> Result<Self::Ok, Self::Error> + where + T: Serialize, + { + value.serialize(self) + } + + fn serialize_newtype_variant<T: ?Sized>( + self, + _: &'static str, + _: u32, + variant: &'static str, + value: &T, + ) -> Result<Self::Ok, Self::Error> + where + T: Serialize, + { + try!(self.0.serialize_key(variant)); + self.0.serialize_value(value) + } + + fn serialize_seq(self, _: Option<usize>) -> Result<Self::SerializeSeq, Self::Error> { + Err(Self::bad_type(Unsupported::Sequence)) + } + + fn serialize_tuple(self, _: usize) -> Result<Self::SerializeTuple, Self::Error> { + Err(Self::bad_type(Unsupported::Tuple)) + } + + fn serialize_tuple_struct( + self, + _: &'static str, + _: usize, + ) -> Result<Self::SerializeTupleStruct, Self::Error> { + Err(Self::bad_type(Unsupported::TupleStruct)) + } + + fn serialize_tuple_variant( + self, + _: &'static str, + _: u32, + _: &'static str, + _: usize, + ) -> Result<Self::SerializeTupleVariant, Self::Error> { + Err(Self::bad_type(Unsupported::Enum)) + } + + fn serialize_map(self, _: Option<usize>) -> Result<Self::SerializeMap, Self::Error> { + Ok(FlatMapSerializeMap(self.0)) + } + + fn serialize_struct( + self, + _: &'static str, + _: usize, + ) -> Result<Self::SerializeStruct, Self::Error> { + Ok(FlatMapSerializeStruct(self.0)) + } + + fn serialize_struct_variant( + self, + _: &'static str, + _: u32, + inner_variant: &'static str, + _: usize, + ) -> Result<Self::SerializeStructVariant, Self::Error> { + try!(self.0.serialize_key(inner_variant)); + Ok(FlatMapSerializeStructVariantAsMapValue::new( + self.0, + inner_variant, + )) + } +} + +#[cfg(any(feature = "std", feature = "alloc"))] +pub struct FlatMapSerializeMap<'a, M: 'a>(&'a mut M); + +#[cfg(any(feature = "std", feature = "alloc"))] +impl<'a, M> ser::SerializeMap for FlatMapSerializeMap<'a, M> +where + M: SerializeMap + 'a, +{ + type Ok = (); + type Error = M::Error; + + fn serialize_key<T: ?Sized>(&mut self, key: &T) -> Result<(), Self::Error> + where + T: Serialize, + { + self.0.serialize_key(key) + } + + fn serialize_value<T: ?Sized>(&mut self, value: &T) -> Result<(), Self::Error> + where + T: Serialize, + { + self.0.serialize_value(value) + } + + fn serialize_entry<K: ?Sized, V: ?Sized>( + &mut self, + key: &K, + value: &V, + ) -> Result<(), Self::Error> + where + K: Serialize, + V: Serialize, + { + self.0.serialize_entry(key, value) + } + + fn end(self) -> Result<(), Self::Error> { + Ok(()) + } +} + +#[cfg(any(feature = "std", feature = "alloc"))] +pub struct FlatMapSerializeStruct<'a, M: 'a>(&'a mut M); + +#[cfg(any(feature = "std", feature = "alloc"))] +impl<'a, M> ser::SerializeStruct for FlatMapSerializeStruct<'a, M> +where + M: SerializeMap + 'a, +{ + type Ok = (); + type Error = M::Error; + + fn serialize_field<T: ?Sized>( + &mut self, + key: &'static str, + value: &T, + ) -> Result<(), Self::Error> + where + T: Serialize, + { + self.0.serialize_entry(key, value) + } + + fn end(self) -> Result<(), Self::Error> { + Ok(()) + } +} + +#[cfg(any(feature = "std", feature = "alloc"))] +pub struct FlatMapSerializeStructVariantAsMapValue<'a, M: 'a> { + map: &'a mut M, + name: &'static str, + fields: Vec<(&'static str, Content)>, +} + +#[cfg(any(feature = "std", feature = "alloc"))] +impl<'a, M> FlatMapSerializeStructVariantAsMapValue<'a, M> +where + M: SerializeMap + 'a, +{ + fn new(map: &'a mut M, name: &'static str) -> FlatMapSerializeStructVariantAsMapValue<'a, M> { + FlatMapSerializeStructVariantAsMapValue { + map: map, + name: name, + fields: Vec::new(), + } + } +} + +#[cfg(any(feature = "std", feature = "alloc"))] +impl<'a, M> ser::SerializeStructVariant for FlatMapSerializeStructVariantAsMapValue<'a, M> +where + M: SerializeMap + 'a, +{ + type Ok = (); + type Error = M::Error; + + fn serialize_field<T: ?Sized>( + &mut self, + key: &'static str, + value: &T, + ) -> Result<(), Self::Error> + where + T: Serialize, + { + let value = try!(value.serialize(ContentSerializer::<M::Error>::new())); + self.fields.push((key, value)); + Ok(()) + } + + fn end(self) -> Result<(), Self::Error> { + try!(self + .map + .serialize_value(&Content::Struct(self.name, self.fields))); + Ok(()) + } +} |