Enum syn::ReturnType
source · pub enum ReturnType {
Default,
Type(RArrow, Box<Type>),
}
Available on crate features
full
or derive
only.Expand description
Return type of a function signature.
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§
source§impl ReturnType
impl ReturnType
pub fn without_plus(input: ParseStream<'_>) -> Result<Self>
Available on crate feature
parsing
only.Trait Implementations§
source§impl Clone for ReturnType
Available on crate feature clone-impls
only.
impl Clone for ReturnType
Available on crate feature
clone-impls
only.source§impl Debug for ReturnType
Available on crate feature extra-traits
only.
impl Debug for ReturnType
Available on crate feature
extra-traits
only.source§impl Hash for ReturnType
Available on crate feature extra-traits
only.
impl Hash for ReturnType
Available on crate feature
extra-traits
only.source§impl Parse for ReturnType
Available on crate feature parsing
only.
impl Parse for ReturnType
Available on crate feature
parsing
only.fn parse(input: ParseStream<'_>) -> Result<Self>
source§impl PartialEq<ReturnType> for ReturnType
Available on crate feature extra-traits
only.
impl PartialEq<ReturnType> for ReturnType
Available on crate feature
extra-traits
only.source§impl ToTokens for ReturnType
Available on crate feature printing
only.
impl ToTokens for ReturnType
Available on crate feature
printing
only.source§fn to_tokens(&self, tokens: &mut TokenStream)
fn to_tokens(&self, tokens: &mut TokenStream)
source§fn to_token_stream(&self) -> TokenStream
fn to_token_stream(&self) -> TokenStream
source§fn into_token_stream(self) -> TokenStreamwhere
Self: Sized,
fn into_token_stream(self) -> TokenStreamwhere Self: Sized,
impl Eq for ReturnType
Available on crate feature
extra-traits
only.Auto Trait Implementations§
impl RefUnwindSafe for ReturnType
impl !Send for ReturnType
impl !Sync for ReturnType
impl Unpin for ReturnType
impl UnwindSafe for ReturnType
Blanket Implementations§
source§impl<T> Spanned for Twhere
T: Spanned + ?Sized,
impl<T> Spanned for Twhere T: Spanned + ?Sized,
source§fn span(&self) -> Span
fn span(&self) -> Span
Available on crate features
parsing
and printing
only.Returns a
Span
covering the complete contents of this syntax tree
node, or Span::call_site()
if this node is empty.