fluent-serde 0.1.0

Serializer implementations for FluentValue and FluentArgs
Documentation 
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use std::marker::PhantomData;

use serde::ser::{
    SerializeMap, SerializeSeq, SerializeStruct, SerializeStructVariant, SerializeTuple,
    SerializeTupleStruct, SerializeTupleVariant,
};

use super::Error;

pub struct Unsupported<Ok> {
    _never: Never,
    _marker: PhantomData<fn() -> Ok>,
}

enum Never {}

impl<Ok> SerializeMap for Unsupported<Ok> {
    type Ok = Ok;
    type Error = Error;

    fn serialize_key<T: ?Sized>(&mut self, _key: &T) -> Result<(), Self::Error>
    where
        T: serde::Serialize,
    {
        unreachable!()
    }

    fn serialize_value<T: ?Sized>(&mut self, _value: &T) -> Result<(), Self::Error>
    where
        T: serde::Serialize,
    {
        unreachable!()
    }

    fn end(self) -> Result<Self::Ok, Self::Error> {
        unreachable!()
    }
}

impl<Ok> SerializeSeq for Unsupported<Ok> {
    type Ok = Ok;
    type Error = Error;

    fn serialize_element<T: ?Sized>(&mut self, _value: &T) -> Result<(), Self::Error>
    where
        T: serde::Serialize,
    {
        unreachable!()
    }

    fn end(self) -> Result<Self::Ok, Self::Error> {
        unreachable!()
    }
}

impl<Ok> SerializeTuple for Unsupported<Ok> {
    type Ok = Ok;
    type Error = Error;

    fn serialize_element<T: ?Sized>(&mut self, _value: &T) -> Result<(), Self::Error>
    where
        T: serde::Serialize,
    {
        unreachable!()
    }

    fn end(self) -> Result<Self::Ok, Self::Error> {
        unreachable!()
    }
}

impl<Ok> SerializeTupleStruct for Unsupported<Ok> {
    type Ok = Ok;
    type Error = Error;

    fn serialize_field<T: ?Sized>(&mut self, _value: &T) -> Result<(), Self::Error>
    where
        T: serde::Serialize,
    {
        unreachable!()
    }

    fn end(self) -> Result<Self::Ok, Self::Error> {
        unreachable!()
    }
}

impl<Ok> SerializeTupleVariant for Unsupported<Ok> {
    type Ok = Ok;
    type Error = Error;

    fn serialize_field<T: ?Sized>(&mut self, _value: &T) -> Result<(), Self::Error>
    where
        T: serde::Serialize,
    {
        unreachable!()
    }

    fn end(self) -> Result<Self::Ok, Self::Error> {
        unreachable!()
    }
}

impl<Ok> SerializeStruct for Unsupported<Ok> {
    type Ok = Ok;
    type Error = Error;
    fn serialize_field<T: ?Sized>(
        &mut self,
        _key: &'static str,
        _value: &T,
    ) -> Result<(), Self::Error>
    where
        T: serde::Serialize,
    {
        unreachable!()
    }

    fn end(self) -> Result<Self::Ok, Self::Error> {
        unreachable!()
    }
}

impl<Ok> SerializeStructVariant for Unsupported<Ok> {
    type Ok = Ok;
    type Error = Error;
    fn serialize_field<T: ?Sized>(
        &mut self,
        _key: &'static str,
        _value: &T,
    ) -> Result<(), Self::Error>
    where
        T: serde::Serialize,
    {
        unreachable!()
    }

    fn end(self) -> Result<Self::Ok, Self::Error> {
        unreachable!()
    }
}