1 files changed, 1044 insertions, 0 deletions
diff --git a/third_party/rust/serde_json/src/value/ser.rs b/third_party/rust/serde_json/src/value/ser.rs
new file mode 100644
index 0000000000..a29814e92a
--- /dev/null
+++ b/third_party/rust/serde_json/src/value/ser.rs
@@ -0,0 +1,1044 @@
+use crate::error::{Error, ErrorCode, Result};
+use crate::map::Map;
+use crate::number::Number;
+use crate::value::{to_value, Value};
+use alloc::borrow::ToOwned;
+use alloc::string::{String, ToString};
+use alloc::vec::Vec;
+#[cfg(not(feature = "arbitrary_precision"))]
+use core::convert::TryFrom;
+use core::fmt::Display;
+use core::result;
+use serde::ser::{Impossible, Serialize};
+
+impl Serialize for Value {
+    #[inline]
+    fn serialize<S>(&self, serializer: S) -> result::Result<S::Ok, S::Error>
+    where
+        S: ::serde::Serializer,
+    {
+        match self {
+            Value::Null => serializer.serialize_unit(),
+            Value::Bool(b) => serializer.serialize_bool(*b),
+            Value::Number(n) => n.serialize(serializer),
+            Value::String(s) => serializer.serialize_str(s),
+            Value::Array(v) => v.serialize(serializer),
+            #[cfg(any(feature = "std", feature = "alloc"))]
+            Value::Object(m) => {
+                use serde::ser::SerializeMap;
+                let mut map = tri!(serializer.serialize_map(Some(m.len())));
+                for (k, v) in m {
+                    tri!(map.serialize_entry(k, v));
+                }
+                map.end()
+            }
+        }
+    }
+}
+
+/// Serializer whose output is a `Value`.
+///
+/// This is the serializer that backs [`serde_json::to_value`][crate::to_value].
+/// Unlike the main serde_json serializer which goes from some serializable
+/// value of type `T` to JSON text, this one goes from `T` to
+/// `serde_json::Value`.
+///
+/// The `to_value` function is implementable as:
+///
+/// ```
+/// use serde::Serialize;
+/// use serde_json::{Error, Value};
+///
+/// pub fn to_value<T>(input: T) -> Result<Value, Error>
+/// where
+///     T: Serialize,
+/// {
+///     input.serialize(serde_json::value::Serializer)
+/// }
+/// ```
+pub struct Serializer;
+
+impl serde::Serializer for Serializer {
+    type Ok = Value;
+    type Error = Error;
+
+    type SerializeSeq = SerializeVec;
+    type SerializeTuple = SerializeVec;
+    type SerializeTupleStruct = SerializeVec;
+    type SerializeTupleVariant = SerializeTupleVariant;
+    type SerializeMap = SerializeMap;
+    type SerializeStruct = SerializeMap;
+    type SerializeStructVariant = SerializeStructVariant;
+
+    #[inline]
+    fn serialize_bool(self, value: bool) -> Result<Value> {
+        Ok(Value::Bool(value))
+    }
+
+    #[inline]
+    fn serialize_i8(self, value: i8) -> Result<Value> {
+        self.serialize_i64(value as i64)
+    }
+
+    #[inline]
+    fn serialize_i16(self, value: i16) -> Result<Value> {
+        self.serialize_i64(value as i64)
+    }
+
+    #[inline]
+    fn serialize_i32(self, value: i32) -> Result<Value> {
+        self.serialize_i64(value as i64)
+    }
+
+    fn serialize_i64(self, value: i64) -> Result<Value> {
+        Ok(Value::Number(value.into()))
+    }
+
+    fn serialize_i128(self, value: i128) -> Result<Value> {
+        #[cfg(feature = "arbitrary_precision")]
+        {
+            Ok(Value::Number(value.into()))
+        }
+
+        #[cfg(not(feature = "arbitrary_precision"))]
+        {
+            if let Ok(value) = u64::try_from(value) {
+                Ok(Value::Number(value.into()))
+            } else if let Ok(value) = i64::try_from(value) {
+                Ok(Value::Number(value.into()))
+            } else {
+                Err(Error::syntax(ErrorCode::NumberOutOfRange, 0, 0))
+            }
+        }
+    }
+
+    #[inline]
+    fn serialize_u8(self, value: u8) -> Result<Value> {
+        self.serialize_u64(value as u64)
+    }
+
+    #[inline]
+    fn serialize_u16(self, value: u16) -> Result<Value> {
+        self.serialize_u64(value as u64)
+    }
+
+    #[inline]
+    fn serialize_u32(self, value: u32) -> Result<Value> {
+        self.serialize_u64(value as u64)
+    }
+
+    #[inline]
+    fn serialize_u64(self, value: u64) -> Result<Value> {
+        Ok(Value::Number(value.into()))
+    }
+
+    fn serialize_u128(self, value: u128) -> Result<Value> {
+        #[cfg(feature = "arbitrary_precision")]
+        {
+            Ok(Value::Number(value.into()))
+        }
+
+        #[cfg(not(feature = "arbitrary_precision"))]
+        {
+            if let Ok(value) = u64::try_from(value) {
+                Ok(Value::Number(value.into()))
+            } else {
+                Err(Error::syntax(ErrorCode::NumberOutOfRange, 0, 0))
+            }
+        }
+    }
+
+    #[inline]
+    fn serialize_f32(self, value: f32) -> Result<Value> {
+        self.serialize_f64(value as f64)
+    }
+
+    #[inline]
+    fn serialize_f64(self, value: f64) -> Result<Value> {
+        Ok(Number::from_f64(value).map_or(Value::Null, Value::Number))
+    }
+
+    #[inline]
+    fn serialize_char(self, value: char) -> Result<Value> {
+        let mut s = String::new();
+        s.push(value);
+        Ok(Value::String(s))
+    }
+
+    #[inline]
+    fn serialize_str(self, value: &str) -> Result<Value> {
+        Ok(Value::String(value.to_owned()))
+    }
+
+    fn serialize_bytes(self, value: &[u8]) -> Result<Value> {
+        let vec = value.iter().map(|&b| Value::Number(b.into())).collect();
+        Ok(Value::Array(vec))
+    }
+
+    #[inline]
+    fn serialize_unit(self) -> Result<Value> {
+        Ok(Value::Null)
+    }
+
+    #[inline]
+    fn serialize_unit_struct(self, _name: &'static str) -> Result<Value> {
+        self.serialize_unit()
+    }
+
+    #[inline]
+    fn serialize_unit_variant(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        variant: &'static str,
+    ) -> Result<Value> {
+        self.serialize_str(variant)
+    }
+
+    #[inline]
+    fn serialize_newtype_struct<T>(self, _name: &'static str, value: &T) -> Result<Value>
+    where
+        T: ?Sized + Serialize,
+    {
+        value.serialize(self)
+    }
+
+    fn serialize_newtype_variant<T>(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        variant: &'static str,
+        value: &T,
+    ) -> Result<Value>
+    where
+        T: ?Sized + Serialize,
+    {
+        let mut values = Map::new();
+        values.insert(String::from(variant), tri!(to_value(value)));
+        Ok(Value::Object(values))
+    }
+
+    #[inline]
+    fn serialize_none(self) -> Result<Value> {
+        self.serialize_unit()
+    }
+
+    #[inline]
+    fn serialize_some<T>(self, value: &T) -> Result<Value>
+    where
+        T: ?Sized + Serialize,
+    {
+        value.serialize(self)
+    }
+
+    fn serialize_seq(self, len: Option<usize>) -> Result<Self::SerializeSeq> {
+        Ok(SerializeVec {
+            vec: Vec::with_capacity(len.unwrap_or(0)),
+        })
+    }
+
+    fn serialize_tuple(self, len: usize) -> Result<Self::SerializeTuple> {
+        self.serialize_seq(Some(len))
+    }
+
+    fn serialize_tuple_struct(
+        self,
+        _name: &'static str,
+        len: usize,
+    ) -> Result<Self::SerializeTupleStruct> {
+        self.serialize_seq(Some(len))
+    }
+
+    fn serialize_tuple_variant(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        variant: &'static str,
+        len: usize,
+    ) -> Result<Self::SerializeTupleVariant> {
+        Ok(SerializeTupleVariant {
+            name: String::from(variant),
+            vec: Vec::with_capacity(len),
+        })
+    }
+
+    fn serialize_map(self, _len: Option<usize>) -> Result<Self::SerializeMap> {
+        Ok(SerializeMap::Map {
+            map: Map::new(),
+            next_key: None,
+        })
+    }
+
+    fn serialize_struct(self, name: &'static str, len: usize) -> Result<Self::SerializeStruct> {
+        match name {
+            #[cfg(feature = "arbitrary_precision")]
+            crate::number::TOKEN => Ok(SerializeMap::Number { out_value: None }),
+            #[cfg(feature = "raw_value")]
+            crate::raw::TOKEN => Ok(SerializeMap::RawValue { out_value: None }),
+            _ => self.serialize_map(Some(len)),
+        }
+    }
+
+    fn serialize_struct_variant(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        variant: &'static str,
+        _len: usize,
+    ) -> Result<Self::SerializeStructVariant> {
+        Ok(SerializeStructVariant {
+            name: String::from(variant),
+            map: Map::new(),
+        })
+    }
+
+    fn collect_str<T>(self, value: &T) -> Result<Value>
+    where
+        T: ?Sized + Display,
+    {
+        Ok(Value::String(value.to_string()))
+    }
+}
+
+pub struct SerializeVec {
+    vec: Vec<Value>,
+}
+
+pub struct SerializeTupleVariant {
+    name: String,
+    vec: Vec<Value>,
+}
+
+pub enum SerializeMap {
+    Map {
+        map: Map<String, Value>,
+        next_key: Option<String>,
+    },
+    #[cfg(feature = "arbitrary_precision")]
+    Number { out_value: Option<Value> },
+    #[cfg(feature = "raw_value")]
+    RawValue { out_value: Option<Value> },
+}
+
+pub struct SerializeStructVariant {
+    name: String,
+    map: Map<String, Value>,
+}
+
+impl serde::ser::SerializeSeq for SerializeVec {
+    type Ok = Value;
+    type Error = Error;
+
+    fn serialize_element<T>(&mut self, value: &T) -> Result<()>
+    where
+        T: ?Sized + Serialize,
+    {
+        self.vec.push(tri!(to_value(value)));
+        Ok(())
+    }
+
+    fn end(self) -> Result<Value> {
+        Ok(Value::Array(self.vec))
+    }
+}
+
+impl serde::ser::SerializeTuple for SerializeVec {
+    type Ok = Value;
+    type Error = Error;
+
+    fn serialize_element<T>(&mut self, value: &T) -> Result<()>
+    where
+        T: ?Sized + Serialize,
+    {
+        serde::ser::SerializeSeq::serialize_element(self, value)
+    }
+
+    fn end(self) -> Result<Value> {
+        serde::ser::SerializeSeq::end(self)
+    }
+}
+
+impl serde::ser::SerializeTupleStruct for SerializeVec {
+    type Ok = Value;
+    type Error = Error;
+
+    fn serialize_field<T>(&mut self, value: &T) -> Result<()>
+    where
+        T: ?Sized + Serialize,
+    {
+        serde::ser::SerializeSeq::serialize_element(self, value)
+    }
+
+    fn end(self) -> Result<Value> {
+        serde::ser::SerializeSeq::end(self)
+    }
+}
+
+impl serde::ser::SerializeTupleVariant for SerializeTupleVariant {
+    type Ok = Value;
+    type Error = Error;
+
+    fn serialize_field<T>(&mut self, value: &T) -> Result<()>
+    where
+        T: ?Sized + Serialize,
+    {
+        self.vec.push(tri!(to_value(value)));
+        Ok(())
+    }
+
+    fn end(self) -> Result<Value> {
+        let mut object = Map::new();
+
+        object.insert(self.name, Value::Array(self.vec));
+
+        Ok(Value::Object(object))
+    }
+}
+
+impl serde::ser::SerializeMap for SerializeMap {
+    type Ok = Value;
+    type Error = Error;
+
+    fn serialize_key<T>(&mut self, key: &T) -> Result<()>
+    where
+        T: ?Sized + Serialize,
+    {
+        match self {
+            SerializeMap::Map { next_key, .. } => {
+                *next_key = Some(tri!(key.serialize(MapKeySerializer)));
+                Ok(())
+            }
+            #[cfg(feature = "arbitrary_precision")]
+            SerializeMap::Number { .. } => unreachable!(),
+            #[cfg(feature = "raw_value")]
+            SerializeMap::RawValue { .. } => unreachable!(),
+        }
+    }
+
+    fn serialize_value<T>(&mut self, value: &T) -> Result<()>
+    where
+        T: ?Sized + Serialize,
+    {
+        match self {
+            SerializeMap::Map { map, next_key } => {
+                let key = next_key.take();
+                // Panic because this indicates a bug in the program rather than an
+                // expected failure.
+                let key = key.expect("serialize_value called before serialize_key");
+                map.insert(key, tri!(to_value(value)));
+                Ok(())
+            }
+            #[cfg(feature = "arbitrary_precision")]
+            SerializeMap::Number { .. } => unreachable!(),
+            #[cfg(feature = "raw_value")]
+            SerializeMap::RawValue { .. } => unreachable!(),
+        }
+    }
+
+    fn end(self) -> Result<Value> {
+        match self {
+            SerializeMap::Map { map, .. } => Ok(Value::Object(map)),
+            #[cfg(feature = "arbitrary_precision")]
+            SerializeMap::Number { .. } => unreachable!(),
+            #[cfg(feature = "raw_value")]
+            SerializeMap::RawValue { .. } => unreachable!(),
+        }
+    }
+}
+
+struct MapKeySerializer;
+
+fn key_must_be_a_string() -> Error {
+    Error::syntax(ErrorCode::KeyMustBeAString, 0, 0)
+}
+
+impl serde::Serializer for MapKeySerializer {
+    type Ok = String;
+    type Error = Error;
+
+    type SerializeSeq = Impossible<String, Error>;
+    type SerializeTuple = Impossible<String, Error>;
+    type SerializeTupleStruct = Impossible<String, Error>;
+    type SerializeTupleVariant = Impossible<String, Error>;
+    type SerializeMap = Impossible<String, Error>;
+    type SerializeStruct = Impossible<String, Error>;
+    type SerializeStructVariant = Impossible<String, Error>;
+
+    #[inline]
+    fn serialize_unit_variant(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        variant: &'static str,
+    ) -> Result<String> {
+        Ok(variant.to_owned())
+    }
+
+    #[inline]
+    fn serialize_newtype_struct<T>(self, _name: &'static str, value: &T) -> Result<String>
+    where
+        T: ?Sized + Serialize,
+    {
+        value.serialize(self)
+    }
+
+    fn serialize_bool(self, _value: bool) -> Result<String> {
+        Err(key_must_be_a_string())
+    }
+
+    fn serialize_i8(self, value: i8) -> Result<String> {
+        Ok(value.to_string())
+    }
+
+    fn serialize_i16(self, value: i16) -> Result<String> {
+        Ok(value.to_string())
+    }
+
+    fn serialize_i32(self, value: i32) -> Result<String> {
+        Ok(value.to_string())
+    }
+
+    fn serialize_i64(self, value: i64) -> Result<String> {
+        Ok(value.to_string())
+    }
+
+    fn serialize_u8(self, value: u8) -> Result<String> {
+        Ok(value.to_string())
+    }
+
+    fn serialize_u16(self, value: u16) -> Result<String> {
+        Ok(value.to_string())
+    }
+
+    fn serialize_u32(self, value: u32) -> Result<String> {
+        Ok(value.to_string())
+    }
+
+    fn serialize_u64(self, value: u64) -> Result<String> {
+        Ok(value.to_string())
+    }
+
+    fn serialize_f32(self, _value: f32) -> Result<String> {
+        Err(key_must_be_a_string())
+    }
+
+    fn serialize_f64(self, _value: f64) -> Result<String> {
+        Err(key_must_be_a_string())
+    }
+
+    #[inline]
+    fn serialize_char(self, value: char) -> Result<String> {
+        Ok({
+            let mut s = String::new();
+            s.push(value);
+            s
+        })
+    }
+
+    #[inline]
+    fn serialize_str(self, value: &str) -> Result<String> {
+        Ok(value.to_owned())
+    }
+
+    fn serialize_bytes(self, _value: &[u8]) -> Result<String> {
+        Err(key_must_be_a_string())
+    }
+
+    fn serialize_unit(self) -> Result<String> {
+        Err(key_must_be_a_string())
+    }
+
+    fn serialize_unit_struct(self, _name: &'static str) -> Result<String> {
+        Err(key_must_be_a_string())
+    }
+
+    fn serialize_newtype_variant<T>(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        _variant: &'static str,
+        _value: &T,
+    ) -> Result<String>
+    where
+        T: ?Sized + Serialize,
+    {
+        Err(key_must_be_a_string())
+    }
+
+    fn serialize_none(self) -> Result<String> {
+        Err(key_must_be_a_string())
+    }
+
+    fn serialize_some<T>(self, _value: &T) -> Result<String>
+    where
+        T: ?Sized + Serialize,
+    {
+        Err(key_must_be_a_string())
+    }
+
+    fn serialize_seq(self, _len: Option<usize>) -> Result<Self::SerializeSeq> {
+        Err(key_must_be_a_string())
+    }
+
+    fn serialize_tuple(self, _len: usize) -> Result<Self::SerializeTuple> {
+        Err(key_must_be_a_string())
+    }
+
+    fn serialize_tuple_struct(
+        self,
+        _name: &'static str,
+        _len: usize,
+    ) -> Result<Self::SerializeTupleStruct> {
+        Err(key_must_be_a_string())
+    }
+
+    fn serialize_tuple_variant(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        _variant: &'static str,
+        _len: usize,
+    ) -> Result<Self::SerializeTupleVariant> {
+        Err(key_must_be_a_string())
+    }
+
+    fn serialize_map(self, _len: Option<usize>) -> Result<Self::SerializeMap> {
+        Err(key_must_be_a_string())
+    }
+
+    fn serialize_struct(self, _name: &'static str, _len: usize) -> Result<Self::SerializeStruct> {
+        Err(key_must_be_a_string())
+    }
+
+    fn serialize_struct_variant(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        _variant: &'static str,
+        _len: usize,
+    ) -> Result<Self::SerializeStructVariant> {
+        Err(key_must_be_a_string())
+    }
+
+    fn collect_str<T>(self, value: &T) -> Result<String>
+    where
+        T: ?Sized + Display,
+    {
+        Ok(value.to_string())
+    }
+}
+
+impl serde::ser::SerializeStruct for SerializeMap {
+    type Ok = Value;
+    type Error = Error;
+
+    fn serialize_field<T>(&mut self, key: &'static str, value: &T) -> Result<()>
+    where
+        T: ?Sized + Serialize,
+    {
+        match self {
+            SerializeMap::Map { .. } => serde::ser::SerializeMap::serialize_entry(self, key, value),
+            #[cfg(feature = "arbitrary_precision")]
+            SerializeMap::Number { out_value } => {
+                if key == crate::number::TOKEN {
+                    *out_value = Some(value.serialize(NumberValueEmitter)?);
+                    Ok(())
+                } else {
+                    Err(invalid_number())
+                }
+            }
+            #[cfg(feature = "raw_value")]
+            SerializeMap::RawValue { out_value } => {
+                if key == crate::raw::TOKEN {
+                    *out_value = Some(value.serialize(RawValueEmitter)?);
+                    Ok(())
+                } else {
+                    Err(invalid_raw_value())
+                }
+            }
+        }
+    }
+
+    fn end(self) -> Result<Value> {
+        match self {
+            SerializeMap::Map { .. } => serde::ser::SerializeMap::end(self),
+            #[cfg(feature = "arbitrary_precision")]
+            SerializeMap::Number { out_value, .. } => {
+                Ok(out_value.expect("number value was not emitted"))
+            }
+            #[cfg(feature = "raw_value")]
+            SerializeMap::RawValue { out_value, .. } => {
+                Ok(out_value.expect("raw value was not emitted"))
+            }
+        }
+    }
+}
+
+impl serde::ser::SerializeStructVariant for SerializeStructVariant {
+    type Ok = Value;
+    type Error = Error;
+
+    fn serialize_field<T>(&mut self, key: &'static str, value: &T) -> Result<()>
+    where
+        T: ?Sized + Serialize,
+    {
+        self.map.insert(String::from(key), tri!(to_value(value)));
+        Ok(())
+    }
+
+    fn end(self) -> Result<Value> {
+        let mut object = Map::new();
+
+        object.insert(self.name, Value::Object(self.map));
+
+        Ok(Value::Object(object))
+    }
+}
+
+#[cfg(feature = "arbitrary_precision")]
+struct NumberValueEmitter;
+
+#[cfg(feature = "arbitrary_precision")]
+fn invalid_number() -> Error {
+    Error::syntax(ErrorCode::InvalidNumber, 0, 0)
+}
+
+#[cfg(feature = "arbitrary_precision")]
+impl serde::ser::Serializer for NumberValueEmitter {
+    type Ok = Value;
+    type Error = Error;
+
+    type SerializeSeq = Impossible<Value, Error>;
+    type SerializeTuple = Impossible<Value, Error>;
+    type SerializeTupleStruct = Impossible<Value, Error>;
+    type SerializeTupleVariant = Impossible<Value, Error>;
+    type SerializeMap = Impossible<Value, Error>;
+    type SerializeStruct = Impossible<Value, Error>;
+    type SerializeStructVariant = Impossible<Value, Error>;
+
+    fn serialize_bool(self, _v: bool) -> Result<Value> {
+        Err(invalid_number())
+    }
+
+    fn serialize_i8(self, _v: i8) -> Result<Value> {
+        Err(invalid_number())
+    }
+
+    fn serialize_i16(self, _v: i16) -> Result<Value> {
+        Err(invalid_number())
+    }
+
+    fn serialize_i32(self, _v: i32) -> Result<Value> {
+        Err(invalid_number())
+    }
+
+    fn serialize_i64(self, _v: i64) -> Result<Value> {
+        Err(invalid_number())
+    }
+
+    fn serialize_u8(self, _v: u8) -> Result<Value> {
+        Err(invalid_number())
+    }
+
+    fn serialize_u16(self, _v: u16) -> Result<Value> {
+        Err(invalid_number())
+    }
+
+    fn serialize_u32(self, _v: u32) -> Result<Value> {
+        Err(invalid_number())
+    }
+
+    fn serialize_u64(self, _v: u64) -> Result<Value> {
+        Err(invalid_number())
+    }
+
+    fn serialize_f32(self, _v: f32) -> Result<Value> {
+        Err(invalid_number())
+    }
+
+    fn serialize_f64(self, _v: f64) -> Result<Value> {
+        Err(invalid_number())
+    }
+
+    fn serialize_char(self, _v: char) -> Result<Value> {
+        Err(invalid_number())
+    }
+
+    fn serialize_str(self, value: &str) -> Result<Value> {
+        let n = tri!(value.to_owned().parse());
+        Ok(Value::Number(n))
+    }
+
+    fn serialize_bytes(self, _value: &[u8]) -> Result<Value> {
+        Err(invalid_number())
+    }
+
+    fn serialize_none(self) -> Result<Value> {
+        Err(invalid_number())
+    }
+
+    fn serialize_some<T>(self, _value: &T) -> Result<Value>
+    where
+        T: ?Sized + Serialize,
+    {
+        Err(invalid_number())
+    }
+
+    fn serialize_unit(self) -> Result<Value> {
+        Err(invalid_number())
+    }
+
+    fn serialize_unit_struct(self, _name: &'static str) -> Result<Value> {
+        Err(invalid_number())
+    }
+
+    fn serialize_unit_variant(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        _variant: &'static str,
+    ) -> Result<Value> {
+        Err(invalid_number())
+    }
+
+    fn serialize_newtype_struct<T>(self, _name: &'static str, _value: &T) -> Result<Value>
+    where
+        T: ?Sized + Serialize,
+    {
+        Err(invalid_number())
+    }
+
+    fn serialize_newtype_variant<T>(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        _variant: &'static str,
+        _value: &T,
+    ) -> Result<Value>
+    where
+        T: ?Sized + Serialize,
+    {
+        Err(invalid_number())
+    }
+
+    fn serialize_seq(self, _len: Option<usize>) -> Result<Self::SerializeSeq> {
+        Err(invalid_number())
+    }
+
+    fn serialize_tuple(self, _len: usize) -> Result<Self::SerializeTuple> {
+        Err(invalid_number())
+    }
+
+    fn serialize_tuple_struct(
+        self,
+        _name: &'static str,
+        _len: usize,
+    ) -> Result<Self::SerializeTupleStruct> {
+        Err(invalid_number())
+    }
+
+    fn serialize_tuple_variant(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        _variant: &'static str,
+        _len: usize,
+    ) -> Result<Self::SerializeTupleVariant> {
+        Err(invalid_number())
+    }
+
+    fn serialize_map(self, _len: Option<usize>) -> Result<Self::SerializeMap> {
+        Err(invalid_number())
+    }
+
+    fn serialize_struct(self, _name: &'static str, _len: usize) -> Result<Self::SerializeStruct> {
+        Err(invalid_number())
+    }
+
+    fn serialize_struct_variant(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        _variant: &'static str,
+        _len: usize,
+    ) -> Result<Self::SerializeStructVariant> {
+        Err(invalid_number())
+    }
+}
+
+#[cfg(feature = "raw_value")]
+struct RawValueEmitter;
+
+#[cfg(feature = "raw_value")]
+fn invalid_raw_value() -> Error {
+    Error::syntax(ErrorCode::ExpectedSomeValue, 0, 0)
+}
+
+#[cfg(feature = "raw_value")]
+impl serde::ser::Serializer for RawValueEmitter {
+    type Ok = Value;
+    type Error = Error;
+
+    type SerializeSeq = Impossible<Value, Error>;
+    type SerializeTuple = Impossible<Value, Error>;
+    type SerializeTupleStruct = Impossible<Value, Error>;
+    type SerializeTupleVariant = Impossible<Value, Error>;
+    type SerializeMap = Impossible<Value, Error>;
+    type SerializeStruct = Impossible<Value, Error>;
+    type SerializeStructVariant = Impossible<Value, Error>;
+
+    fn serialize_bool(self, _v: bool) -> Result<Value> {
+        Err(invalid_raw_value())
+    }
+
+    fn serialize_i8(self, _v: i8) -> Result<Value> {
+        Err(invalid_raw_value())
+    }
+
+    fn serialize_i16(self, _v: i16) -> Result<Value> {
+        Err(invalid_raw_value())
+    }
+
+    fn serialize_i32(self, _v: i32) -> Result<Value> {
+        Err(invalid_raw_value())
+    }
+
+    fn serialize_i64(self, _v: i64) -> Result<Value> {
+        Err(invalid_raw_value())
+    }
+
+    fn serialize_u8(self, _v: u8) -> Result<Value> {
+        Err(invalid_raw_value())
+    }
+
+    fn serialize_u16(self, _v: u16) -> Result<Value> {
+        Err(invalid_raw_value())
+    }
+
+    fn serialize_u32(self, _v: u32) -> Result<Value> {
+        Err(invalid_raw_value())
+    }
+
+    fn serialize_u64(self, _v: u64) -> Result<Value> {
+        Err(invalid_raw_value())
+    }
+
+    fn serialize_f32(self, _v: f32) -> Result<Value> {
+        Err(invalid_raw_value())
+    }
+
+    fn serialize_f64(self, _v: f64) -> Result<Value> {
+        Err(invalid_raw_value())
+    }
+
+    fn serialize_char(self, _v: char) -> Result<Value> {
+        Err(invalid_raw_value())
+    }
+
+    fn serialize_str(self, value: &str) -> Result<Value> {
+        crate::from_str(value)
+    }
+
+    fn serialize_bytes(self, _value: &[u8]) -> Result<Value> {
+        Err(invalid_raw_value())
+    }
+
+    fn serialize_none(self) -> Result<Value> {
+        Err(invalid_raw_value())
+    }
+
+    fn serialize_some<T>(self, _value: &T) -> Result<Value>
+    where
+        T: ?Sized + Serialize,
+    {
+        Err(invalid_raw_value())
+    }
+
+    fn serialize_unit(self) -> Result<Value> {
+        Err(invalid_raw_value())
+    }
+
+    fn serialize_unit_struct(self, _name: &'static str) -> Result<Value> {
+        Err(invalid_raw_value())
+    }
+
+    fn serialize_unit_variant(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        _variant: &'static str,
+    ) -> Result<Value> {
+        Err(invalid_raw_value())
+    }
+
+    fn serialize_newtype_struct<T>(self, _name: &'static str, _value: &T) -> Result<Value>
+    where
+        T: ?Sized + Serialize,
+    {
+        Err(invalid_raw_value())
+    }
+
+    fn serialize_newtype_variant<T>(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        _variant: &'static str,
+        _value: &T,
+    ) -> Result<Value>
+    where
+        T: ?Sized + Serialize,
+    {
+        Err(invalid_raw_value())
+    }
+
+    fn serialize_seq(self, _len: Option<usize>) -> Result<Self::SerializeSeq> {
+        Err(invalid_raw_value())
+    }
+
+    fn serialize_tuple(self, _len: usize) -> Result<Self::SerializeTuple> {
+        Err(invalid_raw_value())
+    }
+
+    fn serialize_tuple_struct(
+        self,
+        _name: &'static str,
+        _len: usize,
+    ) -> Result<Self::SerializeTupleStruct> {
+        Err(invalid_raw_value())
+    }
+
+    fn serialize_tuple_variant(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        _variant: &'static str,
+        _len: usize,
+    ) -> Result<Self::SerializeTupleVariant> {
+        Err(invalid_raw_value())
+    }
+
+    fn serialize_map(self, _len: Option<usize>) -> Result<Self::SerializeMap> {
+        Err(invalid_raw_value())
+    }
+
+    fn serialize_struct(self, _name: &'static str, _len: usize) -> Result<Self::SerializeStruct> {
+        Err(invalid_raw_value())
+    }
+
+    fn serialize_struct_variant(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        _variant: &'static str,
+        _len: usize,
+    ) -> Result<Self::SerializeStructVariant> {
+        Err(invalid_raw_value())
+    }
+
+    fn collect_str<T>(self, value: &T) -> Result<Self::Ok>
+    where
+        T: ?Sized + Display,
+    {
+        self.serialize_str(&value.to_string())
+    }
+}