641 lines
16 KiB
Rust
641 lines
16 KiB
Rust
use std::{error::Error, fmt};
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use indexmap::IndexMap;
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use serde::{
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ser::{self, Impossible},
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Serialize,
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};
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use crate::{ConstValue, Name, Number};
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/// This type represents errors that can occur when serializing.
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#[derive(Debug)]
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pub struct SerializerError(String);
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impl fmt::Display for SerializerError {
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fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
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match *self {
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SerializerError(ref s) => fmt.write_str(s),
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}
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}
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}
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impl Error for SerializerError {
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fn description(&self) -> &str {
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"ConstValue serializer error"
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}
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}
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impl ser::Error for SerializerError {
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fn custom<T: fmt::Display>(msg: T) -> SerializerError {
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SerializerError(msg.to_string())
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}
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}
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/// Convert a `T` into `ConstValue` which is an enum that can represent any
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/// valid GraphQL data.
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#[inline]
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pub fn to_value<T: ser::Serialize>(value: T) -> Result<ConstValue, SerializerError> {
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value.serialize(Serializer)
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}
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struct Serializer;
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impl ser::Serializer for Serializer {
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type Ok = ConstValue;
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type Error = SerializerError;
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type SerializeSeq = SerializeSeq;
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type SerializeTuple = SerializeTuple;
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type SerializeTupleStruct = SerializeTupleStruct;
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type SerializeTupleVariant = SerializeTupleVariant;
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type SerializeMap = SerializeMap;
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type SerializeStruct = SerializeStruct;
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type SerializeStructVariant = SerializeStructVariant;
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#[inline]
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fn serialize_bool(self, v: bool) -> Result<Self::Ok, Self::Error> {
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Ok(ConstValue::Boolean(v))
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}
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#[inline]
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fn serialize_i8(self, v: i8) -> Result<Self::Ok, Self::Error> {
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Ok(ConstValue::Number(v.into()))
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}
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#[inline]
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fn serialize_i16(self, v: i16) -> Result<Self::Ok, Self::Error> {
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Ok(ConstValue::Number(v.into()))
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}
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#[inline]
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fn serialize_i32(self, v: i32) -> Result<Self::Ok, Self::Error> {
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Ok(ConstValue::Number(v.into()))
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}
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#[inline]
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fn serialize_i64(self, v: i64) -> Result<Self::Ok, Self::Error> {
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Ok(ConstValue::Number(v.into()))
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}
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#[inline]
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fn serialize_u8(self, v: u8) -> Result<Self::Ok, Self::Error> {
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Ok(ConstValue::Number(v.into()))
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}
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#[inline]
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fn serialize_u16(self, v: u16) -> Result<Self::Ok, Self::Error> {
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Ok(ConstValue::Number(v.into()))
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}
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#[inline]
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fn serialize_u32(self, v: u32) -> Result<Self::Ok, Self::Error> {
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Ok(ConstValue::Number(v.into()))
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}
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#[inline]
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fn serialize_u64(self, v: u64) -> Result<Self::Ok, Self::Error> {
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Ok(ConstValue::Number(v.into()))
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}
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#[inline]
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fn serialize_f32(self, v: f32) -> Result<Self::Ok, Self::Error> {
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self.serialize_f64(v as f64)
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}
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#[inline]
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fn serialize_f64(self, v: f64) -> Result<Self::Ok, Self::Error> {
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match Number::from_f64(v) {
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Some(v) => Ok(ConstValue::Number(v)),
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None => Ok(ConstValue::Null),
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}
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}
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#[inline]
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fn serialize_char(self, _v: char) -> Result<Self::Ok, Self::Error> {
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Err(SerializerError("char is not supported.".to_string()))
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}
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#[inline]
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fn serialize_str(self, v: &str) -> Result<Self::Ok, Self::Error> {
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Ok(ConstValue::String(v.to_string()))
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}
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#[inline]
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fn serialize_bytes(self, v: &[u8]) -> Result<Self::Ok, Self::Error> {
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Ok(ConstValue::Binary(v.to_vec().into()))
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}
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#[inline]
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fn serialize_none(self) -> Result<Self::Ok, Self::Error> {
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Ok(ConstValue::Null)
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}
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#[inline]
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fn serialize_some<T: ?Sized>(self, value: &T) -> Result<Self::Ok, Self::Error>
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where
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T: ser::Serialize,
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{
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value.serialize(self)
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}
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#[inline]
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fn serialize_unit(self) -> Result<Self::Ok, Self::Error> {
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Ok(ConstValue::Null)
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}
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#[inline]
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fn serialize_unit_struct(self, _name: &'static str) -> Result<Self::Ok, Self::Error> {
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Ok(ConstValue::Null)
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}
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#[inline]
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fn serialize_unit_variant(
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self,
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_name: &'static str,
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_variant_index: u32,
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variant: &'static str,
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) -> Result<Self::Ok, Self::Error> {
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Ok(ConstValue::String(variant.to_string()))
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}
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#[inline]
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fn serialize_newtype_struct<T: ?Sized>(
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self,
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_name: &'static str,
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value: &T,
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) -> Result<Self::Ok, Self::Error>
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where
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T: ser::Serialize,
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{
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value.serialize(self)
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}
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#[inline]
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fn serialize_newtype_variant<T: ?Sized>(
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self,
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_name: &'static str,
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_variant_index: u32,
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variant: &'static str,
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value: &T,
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) -> Result<Self::Ok, Self::Error>
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where
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T: ser::Serialize,
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{
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value.serialize(self).map(|v| {
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let mut map = IndexMap::new();
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map.insert(Name::new(variant), v);
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ConstValue::Object(map)
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})
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}
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#[inline]
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fn serialize_seq(self, _len: Option<usize>) -> Result<Self::SerializeSeq, Self::Error> {
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Ok(SerializeSeq(vec![]))
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}
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#[inline]
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fn serialize_tuple(self, _len: usize) -> Result<Self::SerializeTuple, Self::Error> {
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Ok(SerializeTuple(vec![]))
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}
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#[inline]
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fn serialize_tuple_struct(
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self,
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_name: &'static str,
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_len: usize,
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) -> Result<Self::SerializeTupleStruct, Self::Error> {
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Ok(SerializeTupleStruct(vec![]))
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}
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#[inline]
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fn serialize_tuple_variant(
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self,
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_name: &'static str,
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_variant_index: u32,
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variant: &'static str,
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len: usize,
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) -> Result<Self::SerializeTupleVariant, Self::Error> {
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Ok(SerializeTupleVariant(
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Name::new(variant),
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Vec::with_capacity(len),
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))
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}
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#[inline]
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fn serialize_map(self, _len: Option<usize>) -> Result<Self::SerializeMap, Self::Error> {
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Ok(SerializeMap {
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map: IndexMap::new(),
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key: None,
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})
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}
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#[inline]
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fn serialize_struct(
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self,
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_name: &'static str,
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_len: usize,
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) -> Result<Self::SerializeStruct, Self::Error> {
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Ok(SerializeStruct(IndexMap::new()))
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}
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#[inline]
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fn serialize_struct_variant(
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self,
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_name: &'static str,
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_variant_index: u32,
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variant: &'static str,
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_len: usize,
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) -> Result<Self::SerializeStructVariant, Self::Error> {
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Ok(SerializeStructVariant(Name::new(variant), IndexMap::new()))
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}
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#[inline]
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fn is_human_readable(&self) -> bool {
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true
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}
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}
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struct SerializeSeq(Vec<ConstValue>);
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impl ser::SerializeSeq for SerializeSeq {
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type Ok = ConstValue;
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type Error = SerializerError;
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#[inline]
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fn serialize_element<T: ?Sized>(&mut self, value: &T) -> Result<(), Self::Error>
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where
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T: ser::Serialize,
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{
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let value = value.serialize(Serializer)?;
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self.0.push(value);
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Ok(())
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}
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#[inline]
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fn end(self) -> Result<Self::Ok, Self::Error> {
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Ok(ConstValue::List(self.0))
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}
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}
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struct SerializeTuple(Vec<ConstValue>);
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impl ser::SerializeTuple for SerializeTuple {
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type Ok = ConstValue;
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type Error = SerializerError;
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#[inline]
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fn serialize_element<T: ?Sized>(&mut self, value: &T) -> Result<(), Self::Error>
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where
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T: ser::Serialize,
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{
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let value = value.serialize(Serializer)?;
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self.0.push(value);
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Ok(())
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}
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#[inline]
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fn end(self) -> Result<Self::Ok, Self::Error> {
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Ok(ConstValue::List(self.0))
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}
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}
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struct SerializeTupleStruct(Vec<ConstValue>);
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impl ser::SerializeTupleStruct for SerializeTupleStruct {
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type Ok = ConstValue;
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type Error = SerializerError;
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#[inline]
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fn serialize_field<T: ?Sized>(&mut self, value: &T) -> Result<(), Self::Error>
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where
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T: ser::Serialize,
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{
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let value = value.serialize(Serializer)?;
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self.0.push(value);
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Ok(())
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}
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#[inline]
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fn end(self) -> Result<Self::Ok, Self::Error> {
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Ok(ConstValue::List(self.0))
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}
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}
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struct SerializeTupleVariant(Name, Vec<ConstValue>);
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impl ser::SerializeTupleVariant for SerializeTupleVariant {
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type Ok = ConstValue;
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type Error = SerializerError;
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#[inline]
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fn serialize_field<T: ?Sized>(&mut self, value: &T) -> Result<(), Self::Error>
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where
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T: ser::Serialize,
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{
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let value = value.serialize(Serializer)?;
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self.1.push(value);
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Ok(())
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}
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#[inline]
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fn end(self) -> Result<Self::Ok, Self::Error> {
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let mut map = IndexMap::new();
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map.insert(self.0, ConstValue::List(self.1));
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Ok(ConstValue::Object(map))
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}
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}
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struct SerializeMap {
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map: IndexMap<Name, ConstValue>,
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key: Option<Name>,
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}
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impl ser::SerializeMap for SerializeMap {
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type Ok = ConstValue;
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type Error = SerializerError;
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#[inline]
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fn serialize_key<T: ?Sized>(&mut self, key: &T) -> Result<(), Self::Error>
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where
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T: ser::Serialize,
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{
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let key = key.serialize(MapKeySerializer)?;
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self.key = Some(key);
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Ok(())
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}
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#[inline]
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fn serialize_value<T: ?Sized>(&mut self, value: &T) -> Result<(), Self::Error>
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where
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T: ser::Serialize,
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{
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let value = value.serialize(Serializer)?;
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self.map.insert(self.key.take().unwrap(), value);
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Ok(())
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}
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#[inline]
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fn end(self) -> Result<Self::Ok, Self::Error> {
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Ok(ConstValue::Object(self.map))
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}
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}
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struct SerializeStruct(IndexMap<Name, ConstValue>);
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impl ser::SerializeStruct for SerializeStruct {
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type Ok = ConstValue;
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type Error = SerializerError;
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#[inline]
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fn serialize_field<T: ?Sized>(
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&mut self,
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key: &'static str,
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value: &T,
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) -> Result<(), Self::Error>
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where
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T: ser::Serialize,
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{
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let key = Name::new(key);
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let value = value.serialize(Serializer)?;
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self.0.insert(key, value);
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Ok(())
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}
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#[inline]
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fn end(self) -> Result<Self::Ok, Self::Error> {
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Ok(ConstValue::Object(self.0))
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}
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}
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struct SerializeStructVariant(Name, IndexMap<Name, ConstValue>);
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impl ser::SerializeStructVariant for SerializeStructVariant {
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type Ok = ConstValue;
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type Error = SerializerError;
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#[inline]
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fn serialize_field<T: ?Sized>(
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&mut self,
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key: &'static str,
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value: &T,
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) -> Result<(), Self::Error>
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where
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T: ser::Serialize,
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{
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let key = Name::new(key);
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let value = value.serialize(Serializer)?;
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self.1.insert(key, value);
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Ok(())
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}
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#[inline]
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fn end(self) -> Result<Self::Ok, Self::Error> {
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let mut map = IndexMap::new();
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map.insert(self.0, ConstValue::Object(self.1));
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Ok(ConstValue::Object(map))
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}
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}
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#[inline]
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fn key_must_be_a_string() -> SerializerError {
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SerializerError("Key must be a string".to_string())
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}
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struct MapKeySerializer;
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impl serde::Serializer for MapKeySerializer {
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type Ok = Name;
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type Error = SerializerError;
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type SerializeSeq = Impossible<Name, SerializerError>;
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type SerializeTuple = Impossible<Name, SerializerError>;
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type SerializeTupleStruct = Impossible<Name, SerializerError>;
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type SerializeTupleVariant = Impossible<Name, SerializerError>;
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type SerializeMap = Impossible<Name, SerializerError>;
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type SerializeStruct = Impossible<Name, SerializerError>;
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type SerializeStructVariant = Impossible<Name, SerializerError>;
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#[inline]
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fn serialize_bool(self, _v: bool) -> Result<Self::Ok, Self::Error> {
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Err(key_must_be_a_string())
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}
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#[inline]
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fn serialize_i8(self, _v: i8) -> Result<Self::Ok, Self::Error> {
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Err(key_must_be_a_string())
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}
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#[inline]
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fn serialize_i16(self, _v: i16) -> Result<Self::Ok, Self::Error> {
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Err(key_must_be_a_string())
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}
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#[inline]
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fn serialize_i32(self, _v: i32) -> Result<Self::Ok, Self::Error> {
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Err(key_must_be_a_string())
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}
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#[inline]
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fn serialize_i64(self, _v: i64) -> Result<Self::Ok, Self::Error> {
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Err(key_must_be_a_string())
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}
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#[inline]
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fn serialize_u8(self, _v: u8) -> Result<Self::Ok, Self::Error> {
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Err(key_must_be_a_string())
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}
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#[inline]
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fn serialize_u16(self, _v: u16) -> Result<Self::Ok, Self::Error> {
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Err(key_must_be_a_string())
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}
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#[inline]
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fn serialize_u32(self, _v: u32) -> Result<Self::Ok, Self::Error> {
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Err(key_must_be_a_string())
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}
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#[inline]
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fn serialize_u64(self, _v: u64) -> Result<Self::Ok, Self::Error> {
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Err(key_must_be_a_string())
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}
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#[inline]
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fn serialize_f32(self, _v: f32) -> Result<Self::Ok, Self::Error> {
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Err(key_must_be_a_string())
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}
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#[inline]
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fn serialize_f64(self, _v: f64) -> Result<Self::Ok, Self::Error> {
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Err(key_must_be_a_string())
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}
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#[inline]
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fn serialize_char(self, _v: char) -> Result<Self::Ok, Self::Error> {
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Err(key_must_be_a_string())
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}
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#[inline]
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fn serialize_str(self, v: &str) -> Result<Self::Ok, Self::Error> {
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Ok(Name::new(v))
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}
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#[inline]
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fn serialize_bytes(self, _v: &[u8]) -> Result<Self::Ok, Self::Error> {
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Err(key_must_be_a_string())
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}
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#[inline]
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fn serialize_none(self) -> Result<Self::Ok, Self::Error> {
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Err(key_must_be_a_string())
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}
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#[inline]
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fn serialize_some<T: ?Sized>(self, _value: &T) -> Result<Self::Ok, Self::Error>
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where
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T: Serialize,
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{
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Err(key_must_be_a_string())
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}
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#[inline]
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fn serialize_unit(self) -> Result<Self::Ok, Self::Error> {
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Err(key_must_be_a_string())
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}
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#[inline]
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fn serialize_unit_struct(self, _name: &'static str) -> Result<Self::Ok, Self::Error> {
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Err(key_must_be_a_string())
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}
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|
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#[inline]
|
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fn serialize_unit_variant(
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self,
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|
_name: &'static str,
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|
_variant_index: u32,
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|
variant: &'static str,
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) -> Result<Self::Ok, Self::Error> {
|
|
Ok(Name::new(variant))
|
|
}
|
|
|
|
#[inline]
|
|
fn serialize_newtype_struct<T: ?Sized>(
|
|
self,
|
|
_name: &'static str,
|
|
_value: &T,
|
|
) -> Result<Self::Ok, Self::Error>
|
|
where
|
|
T: Serialize,
|
|
{
|
|
Err(key_must_be_a_string())
|
|
}
|
|
|
|
#[inline]
|
|
fn serialize_newtype_variant<T: ?Sized>(
|
|
self,
|
|
_name: &'static str,
|
|
_variant_index: u32,
|
|
_variant: &'static str,
|
|
_value: &T,
|
|
) -> Result<Self::Ok, Self::Error>
|
|
where
|
|
T: Serialize,
|
|
{
|
|
Err(key_must_be_a_string())
|
|
}
|
|
|
|
#[inline]
|
|
fn serialize_seq(self, _len: Option<usize>) -> Result<Self::SerializeSeq, Self::Error> {
|
|
Err(key_must_be_a_string())
|
|
}
|
|
|
|
#[inline]
|
|
fn serialize_tuple(self, _len: usize) -> Result<Self::SerializeTuple, Self::Error> {
|
|
Err(key_must_be_a_string())
|
|
}
|
|
|
|
#[inline]
|
|
fn serialize_tuple_struct(
|
|
self,
|
|
_name: &'static str,
|
|
_len: usize,
|
|
) -> Result<Self::SerializeTupleStruct, Self::Error> {
|
|
Err(key_must_be_a_string())
|
|
}
|
|
|
|
#[inline]
|
|
fn serialize_tuple_variant(
|
|
self,
|
|
_name: &'static str,
|
|
_variant_index: u32,
|
|
_variant: &'static str,
|
|
_len: usize,
|
|
) -> Result<Self::SerializeTupleVariant, Self::Error> {
|
|
Err(key_must_be_a_string())
|
|
}
|
|
|
|
#[inline]
|
|
fn serialize_map(self, _len: Option<usize>) -> Result<Self::SerializeMap, Self::Error> {
|
|
Err(key_must_be_a_string())
|
|
}
|
|
|
|
#[inline]
|
|
fn serialize_struct(
|
|
self,
|
|
_name: &'static str,
|
|
_len: usize,
|
|
) -> Result<Self::SerializeStruct, Self::Error> {
|
|
Err(key_must_be_a_string())
|
|
}
|
|
|
|
#[inline]
|
|
fn serialize_struct_variant(
|
|
self,
|
|
_name: &'static str,
|
|
_variant_index: u32,
|
|
_variant: &'static str,
|
|
_len: usize,
|
|
) -> Result<Self::SerializeStructVariant, Self::Error> {
|
|
Err(key_must_be_a_string())
|
|
}
|
|
}
|