Enum syn::ReturnType
source · [−]Available on crate features
full
or derive
only.Expand description
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
sourceimpl ReturnType
impl ReturnType
pub fn without_plus(input: ParseStream<'_>) -> Result<Self>
Available on crate feature
parsing
only.Trait Implementations
sourceimpl Clone for ReturnType
Available on crate feature clone-impls
only.
impl Clone for ReturnType
Available on crate feature
clone-impls
only.sourceimpl Debug for ReturnType
Available on crate feature extra-traits
only.
impl Debug for ReturnType
Available on crate feature
extra-traits
only.sourceimpl Hash for ReturnType
Available on crate feature extra-traits
only.
impl Hash for ReturnType
Available on crate feature
extra-traits
only.sourceimpl 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>
sourceimpl PartialEq<ReturnType> for ReturnType
Available on crate feature extra-traits
only.
impl PartialEq<ReturnType> for ReturnType
Available on crate feature
extra-traits
only.sourceimpl ToTokens for ReturnType
Available on crate feature printing
only.
impl ToTokens for ReturnType
Available on crate feature
printing
only.sourcefn to_tokens(&self, tokens: &mut TokenStream)
fn to_tokens(&self, tokens: &mut TokenStream)
sourcefn to_token_stream(&self) -> TokenStream
fn to_token_stream(&self) -> TokenStream
sourcefn into_token_stream(self) -> TokenStream
fn into_token_stream(self) -> TokenStream
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
sourceimpl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
const: unstable · sourcefn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
sourceimpl<T> Spanned for Twhere
T: Spanned + ?Sized,
impl<T> Spanned for Twhere
T: Spanned + ?Sized,
sourcefn 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. Read more