Trait VariantDecoder

pub trait VariantDecoder<'de> {
    type Cx: ?Sized + Context;
    type DecodeTag<'this>: Decoder<'de, Cx = Self::Cx, Error = <Self::Cx as Context>::Error, Mode = <Self::Cx as Context>::Mode>
       where Self: 'this;
    type DecodeValue<'this>: Decoder<'de, Cx = Self::Cx, Error = <Self::Cx as Context>::Error, Mode = <Self::Cx as Context>::Mode>
       where Self: 'this;

    // Required methods
    fn decode_tag(
        &mut self,
    ) -> Result<Self::DecodeTag<'_>, <Self::Cx as Context>::Error>;
    fn decode_value(
        &mut self,
    ) -> Result<Self::DecodeValue<'_>, <Self::Cx as Context>::Error>;
}

Trait governing how to decode a variant.

Required Associated Types

type Cx: ?Sized + Context

Context associated with the decoder.

type DecodeTag<'this>: Decoder<'de, Cx = Self::Cx, Error = <Self::Cx as Context>::Error, Mode = <Self::Cx as Context>::Mode> where Self: 'this

The decoder to use for the variant tag.

type DecodeValue<'this>: Decoder<'de, Cx = Self::Cx, Error = <Self::Cx as Context>::Error, Mode = <Self::Cx as Context>::Mode> where Self: 'this

The decoder to use for the variant value.

Required Methods

fn decode_tag( &mut self, ) -> Result<Self::DecodeTag<'_>, <Self::Cx as Context>::Error>

Return the decoder for the first value in the pair.

If this is a map the first value would be the key of the map, if this is a struct the first value would be the field of the struct.

fn decode_value( &mut self, ) -> Result<Self::DecodeValue<'_>, <Self::Cx as Context>::Error>

Decode the second value in the pair..

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors