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 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.

impl Eq for ReturnType

impl PartialEq<ReturnType> for ReturnType

fn eq(&self, other: &ReturnType) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &ReturnType) -> bool

This method tests for !=.

impl Debug for ReturnType

fn fmt(&self, f: &mut Formatter) -> Result

Formats the value using the given formatter.

impl Hash for ReturnType

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given [Hasher].

fn hash_slice<H>(data: &[Self], state: &mut H) where
    H: Hasher, 

Feeds a slice of this type into the given [Hasher].

impl StructuralPartialEq for ReturnType

impl StructuralEq for ReturnType

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

Convert self directly into a TokenStream object.