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use crate::lib::*;
use crate::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,
variant_ident,
tag,
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,
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::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>(self, _: &T) -> Result<Self::Ok, Self::Error>
where
T: ?Sized + Serialize,
{
Err(self.bad_type(Unsupported::Optional))
}
fn serialize_unit(self) -> Result<Self::Ok, Self::Error> {
let mut map = tri!(self.delegate.serialize_map(Some(1)));
tri!(map.serialize_entry(self.tag, self.variant_name));
map.end()
}
fn serialize_unit_struct(self, _: &'static str) -> Result<Self::Ok, Self::Error> {
let mut map = tri!(self.delegate.serialize_map(Some(1)));
tri!(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 = tri!(self.delegate.serialize_map(Some(2)));
tri!(map.serialize_entry(self.tag, self.variant_name));
tri!(map.serialize_entry(inner_variant, &()));
map.end()
}
fn serialize_newtype_struct<T>(
self,
_: &'static str,
value: &T,
) -> Result<Self::Ok, Self::Error>
where
T: ?Sized + Serialize,
{
value.serialize(self)
}
fn serialize_newtype_variant<T>(
self,
_: &'static str,
_: u32,
inner_variant: &'static str,
inner_value: &T,
) -> Result<Self::Ok, Self::Error>
where
T: ?Sized + Serialize,
{
let mut map = tri!(self.delegate.serialize_map(Some(2)));
tri!(map.serialize_entry(self.tag, self.variant_name));
tri!(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 = tri!(self.delegate.serialize_map(Some(2)));
tri!(map.serialize_entry(self.tag, self.variant_name));
tri!(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 = tri!(self.delegate.serialize_map(len.map(|len| len + 1)));
tri!(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 = tri!(self.delegate.serialize_struct(name, len + 1));
tri!(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 = tri!(self.delegate.serialize_map(Some(2)));
tri!(map.serialize_entry(self.tag, self.variant_name));
tri!(map.serialize_key(inner_variant));
Ok(SerializeStructVariantAsMapValue::new(
map,
inner_variant,
len,
))
}
#[cfg(not(any(feature = "std", feature = "alloc")))]
fn collect_str<T>(self, _: &T) -> Result<Self::Ok, Self::Error>
where
T: ?Sized + Display,
{
Err(self.bad_type(Unsupported::String))
}
}
#[cfg(any(feature = "std", feature = "alloc"))]
mod content {
use crate::lib::*;
use crate::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,
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>(&mut self, value: &T) -> Result<(), M::Error>
where
T: ?Sized + Serialize,
{
let value = tri!(value.serialize(ContentSerializer::<M::Error>::new()));
self.fields.push(value);
Ok(())
}
fn end(mut self) -> Result<M::Ok, M::Error> {
tri!(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,
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>(&mut self, key: &'static str, value: &T) -> Result<(), M::Error>
where
T: ?Sized + Serialize,
{
let value = tri!(value.serialize(ContentSerializer::<M::Error>::new()));
self.fields.push((key, value));
Ok(())
}
fn end(mut self) -> Result<M::Ok, M::Error> {
tri!(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 crate::ser::SerializeTuple;
let mut tuple = tri!(serializer.serialize_tuple(elements.len()));
for e in elements {
tri!(tuple.serialize_element(e));
}
tuple.end()
}
Content::TupleStruct(n, ref fields) => {
use crate::ser::SerializeTupleStruct;
let mut ts = tri!(serializer.serialize_tuple_struct(n, fields.len()));
for f in fields {
tri!(ts.serialize_field(f));
}
ts.end()
}
Content::TupleVariant(n, i, v, ref fields) => {
use crate::ser::SerializeTupleVariant;
let mut tv = tri!(serializer.serialize_tuple_variant(n, i, v, fields.len()));
for f in fields {
tri!(tv.serialize_field(f));
}
tv.end()
}
Content::Map(ref entries) => {
use crate::ser::SerializeMap;
let mut map = tri!(serializer.serialize_map(Some(entries.len())));
for (k, v) in entries {
tri!(map.serialize_entry(k, v));
}
map.end()
}
Content::Struct(n, ref fields) => {
use crate::ser::SerializeStruct;
let mut s = tri!(serializer.serialize_struct(n, fields.len()));
for &(k, ref v) in fields {
tri!(s.serialize_field(k, v));
}
s.end()
}
Content::StructVariant(n, i, v, ref fields) => {
use crate::ser::SerializeStructVariant;
let mut sv = tri!(serializer.serialize_struct_variant(n, i, v, fields.len()));
for &(k, ref v) in fields {
tri!(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>(self, value: &T) -> Result<Content, E>
where
T: ?Sized + Serialize,
{
Ok(Content::Some(Box::new(tri!(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>(self, name: &'static str, value: &T) -> Result<Content, E>
where
T: ?Sized + Serialize,
{
Ok(Content::NewtypeStruct(
name,
Box::new(tri!(value.serialize(self))),
))
}
fn serialize_newtype_variant<T>(
self,
name: &'static str,
variant_index: u32,
variant: &'static str,
value: &T,
) -> Result<Content, E>
where
T: ?Sized + Serialize,
{
Ok(Content::NewtypeVariant(
name,
variant_index,
variant,
Box::new(tri!(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,
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,
variant_index,
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,
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,
variant_index,
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>(&mut self, value: &T) -> Result<(), E>
where
T: ?Sized + Serialize,
{
let value = tri!(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>(&mut self, value: &T) -> Result<(), E>
where
T: ?Sized + Serialize,
{
let value = tri!(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>(&mut self, value: &T) -> Result<(), E>
where
T: ?Sized + Serialize,
{
let value = tri!(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>(&mut self, value: &T) -> Result<(), E>
where
T: ?Sized + Serialize,
{
let value = tri!(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>(&mut self, key: &T) -> Result<(), E>
where
T: ?Sized + Serialize,
{
let key = tri!(key.serialize(ContentSerializer::<E>::new()));
self.key = Some(key);
Ok(())
}
fn serialize_value<T>(&mut self, value: &T) -> Result<(), E>
where
T: ?Sized + Serialize,
{
let key = self
.key
.take()
.expect("serialize_value called before serialize_key");
let value = tri!(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, V>(&mut self, key: &K, value: &V) -> Result<(), E>
where
K: ?Sized + Serialize,
V: ?Sized + Serialize,
{
let key = tri!(key.serialize(ContentSerializer::<E>::new()));
let value = tri!(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>(&mut self, key: &'static str, value: &T) -> Result<(), E>
where
T: ?Sized + Serialize,
{
let value = tri!(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>(&mut self, key: &'static str, value: &T) -> Result<(), E>
where
T: ?Sized + Serialize,
{
let value = tri!(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 = FlatMapSerializeTupleVariantAsMapValue<'a, M>;
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>(self, value: &T) -> Result<Self::Ok, Self::Error>
where
T: ?Sized + 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> {
Ok(())
}
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>(
self,
_: &'static str,
value: &T,
) -> Result<Self::Ok, Self::Error>
where
T: ?Sized + Serialize,
{
value.serialize(self)
}
fn serialize_newtype_variant<T>(
self,
_: &'static str,
_: u32,
variant: &'static str,
value: &T,
) -> Result<Self::Ok, Self::Error>
where
T: ?Sized + Serialize,
{
self.0.serialize_entry(variant, 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,
variant: &'static str,
_: usize,
) -> Result<Self::SerializeTupleVariant, Self::Error> {
tri!(self.0.serialize_key(variant));
Ok(FlatMapSerializeTupleVariantAsMapValue::new(self.0))
}
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> {
tri!(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>(&mut self, key: &T) -> Result<(), Self::Error>
where
T: ?Sized + Serialize,
{
self.0.serialize_key(key)
}
fn serialize_value<T>(&mut self, value: &T) -> Result<(), Self::Error>
where
T: ?Sized + Serialize,
{
self.0.serialize_value(value)
}
fn serialize_entry<K, V>(&mut self, key: &K, value: &V) -> Result<(), Self::Error>
where
K: ?Sized + Serialize,
V: ?Sized + 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>(&mut self, key: &'static str, value: &T) -> Result<(), Self::Error>
where
T: ?Sized + Serialize,
{
self.0.serialize_entry(key, value)
}
fn end(self) -> Result<(), Self::Error> {
Ok(())
}
}
////////////////////////////////////////////////////////////////////////////////////////////////////
#[cfg(any(feature = "std", feature = "alloc"))]
pub struct FlatMapSerializeTupleVariantAsMapValue<'a, M: 'a> {
map: &'a mut M,
fields: Vec<Content>,
}
#[cfg(any(feature = "std", feature = "alloc"))]
impl<'a, M> FlatMapSerializeTupleVariantAsMapValue<'a, M>
where
M: SerializeMap + 'a,
{
fn new(map: &'a mut M) -> Self {
FlatMapSerializeTupleVariantAsMapValue {
map,
fields: Vec::new(),
}
}
}
#[cfg(any(feature = "std", feature = "alloc"))]
impl<'a, M> ser::SerializeTupleVariant for FlatMapSerializeTupleVariantAsMapValue<'a, M>
where
M: SerializeMap + 'a,
{
type Ok = ();
type Error = M::Error;
fn serialize_field<T>(&mut self, value: &T) -> Result<(), Self::Error>
where
T: ?Sized + Serialize,
{
let value = tri!(value.serialize(ContentSerializer::<M::Error>::new()));
self.fields.push(value);
Ok(())
}
fn end(self) -> Result<(), Self::Error> {
tri!(self.map.serialize_value(&Content::Seq(self.fields)));
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,
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>(&mut self, key: &'static str, value: &T) -> Result<(), Self::Error>
where
T: ?Sized + Serialize,
{
let value = tri!(value.serialize(ContentSerializer::<M::Error>::new()));
self.fields.push((key, value));
Ok(())
}
fn end(self) -> Result<(), Self::Error> {
tri!(self
.map
.serialize_value(&Content::Struct(self.name, self.fields)));
Ok(())
}
}
pub struct AdjacentlyTaggedEnumVariant {
pub enum_name: &'static str,
pub variant_index: u32,
pub variant_name: &'static str,
}
impl Serialize for AdjacentlyTaggedEnumVariant {
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where
S: Serializer,
{
serializer.serialize_unit_variant(self.enum_name, self.variant_index, self.variant_name)
}
}
// Error when Serialize for a non_exhaustive remote enum encounters a variant
// that is not recognized.
pub struct CannotSerializeVariant<T>(pub T);
impl<T> Display for CannotSerializeVariant<T>
where
T: Debug,
{
fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
write!(formatter, "enum variant cannot be serialized: {:?}", self.0)
}
}