Trait MapEmitter 

pub trait MapEmitter: Send {
    // Required methods
    fn next_key(
        &mut self,
        state: &mut State,
    ) -> Result<Option<SerializeHandle<'_>>, Error>;
    fn next_value(
        &mut self,
        state: &mut State,
    ) -> Result<SerializeHandle<'_>, Error>;
}

A map emitter.

Required Methods

fn next_key( &mut self, state: &mut State, ) -> Result<Option<SerializeHandle<'_>>, Error>

Produces the next key in the map.

If this reached the end of the map None shall be returned. The expectation is that this method changes an internal state in the emitter and the next call to next_value returns the corresponding value.

fn next_value( &mut self, state: &mut State, ) -> Result<SerializeHandle<'_>, Error>

Produces the next value in the map.

Panics

This method shall panic if the emitter is not able to produce a value because the emitter is in the wrong state.

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors