Enum syn::ReturnType

pub enum ReturnType {
    Default,
    Type(RArrow, Box<Type>),
}

Return type of a function signature.

This type is available only if Syn is built with the "derive" or "full" feature.

Variants

Default

Return type is not specified.

Functions default to () and closures default to type inference.

Type(RArrow, Box<Type>)

A particular type is returned.

Implementations

impl ReturnType

pub fn without_plus(input: ParseStream<'_>) -> Result<Self>

Trait Implementations

impl Clone for ReturnType

fn clone(&self) -> Self

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Parse for ReturnType

fn parse(input: ParseStream<'_>) -> Result<Self>

impl ToTokens for ReturnType

fn to_tokens(&self, tokens: &mut TokenStream)

Write self to the given TokenStream.

fn to_token_stream(&self) -> TokenStream

Convert self directly into a TokenStream object.

fn into_token_stream(self) -> TokenStream

where Self: Sized,

Convert self directly into a TokenStream object.