Enum syn::ReturnType

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

Return type of a function signature.

This type is available 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.

Methods

impl ReturnType

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

pub fn parse(input: ParseStream, allow_plus: bool) -> Result<Self>

Trait Implementations

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 into_token_stream(self) -> TokenStream

Convert self directly into a TokenStream object.

impl Clone for ReturnType

fn clone(&self) -> ReturnType

Returns a copy of the value.

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

Performs copy-assignment from source.