Struct Optional 

pub struct Optional<T>(/* private fields */);

Trait Implementations

impl<T> Value for Optional<T>

where T: Value,

const NAME: &'static str

const KIND: Kind<Definition> = T::KIND

const CARDINALITY: Cardinality = Cardinality::Optional

type Native = Option<<T as Value>::Native>

fn postcard_write(value: &<Optional<T> as Value>::Native, bytes: &mut Vec<u8>)

fn postcard_size(value: &<Optional<T> as Value>::Native) -> usize

fn postcard_memory(input: &mut Reader<'_>) -> Result<usize, MessageError>

fn postcard_read( input: &mut Reader<'_>, ) -> Result<<Optional<T> as Value>::Native, MessageError>