Enum rustc_resolve::late::LifetimeRibKind
source · enum LifetimeRibKind {
Item,
Generics {
binder: NodeId,
span: Span,
kind: LifetimeBinderKind,
},
ConstGeneric,
AnonConst,
AnonymousCreateParameter {
binder: NodeId,
report_in_path: bool,
},
AnonymousReportError,
Elided(LifetimeRes),
ElisionFailure,
}
Variants
Item
This rib acts as a barrier to forbid reference to lifetimes of a parent item.
Generics
This rib declares generic parameters.
ConstGeneric
FIXME(const_generics): This patches over an ICE caused by non-’static lifetimes in const generics. We are disallowing this until we can decide on how we want to handle non-’static lifetimes in const generics. See issue #74052 for discussion.
AnonConst
Non-static lifetimes are prohibited in anonymous constants under min_const_generics
.
This function will emit an error if generic_const_exprs
is not enabled, the body identified by
body_id
is an anonymous constant and lifetime_ref
is non-static.
AnonymousCreateParameter
Create a new anonymous lifetime parameter and reference it.
If report_in_path
, report an error when encountering lifetime elision in a path:
struct Foo<'a> { x: &'a () }
async fn foo(x: Foo) {}
Note: the error should not trigger when the elided lifetime is in a pattern or expression-position path:
struct Foo<'a> { x: &'a () }
async fn foo(Foo { x: _ }: Foo<'_>) {}
AnonymousReportError
Give a hard error when either &
or '_
is written. Used to
rule out things like where T: Foo<'_>
. Does not imply an
error on default object bounds (e.g., Box<dyn Foo>
).
Elided(LifetimeRes)
Replace all anonymous lifetimes by provided lifetime.
ElisionFailure
Signal we cannot find which should be the anonymous lifetime.
Trait Implementations
sourceimpl Clone for LifetimeRibKind
impl Clone for LifetimeRibKind
sourcefn clone(&self) -> LifetimeRibKind
fn clone(&self) -> LifetimeRibKind
1.0.0 · sourcefn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresourceimpl Debug for LifetimeRibKind
impl Debug for LifetimeRibKind
impl Copy for LifetimeRibKind
Auto Trait Implementations
impl RefUnwindSafe for LifetimeRibKind
impl !Send for LifetimeRibKind
impl !Sync for LifetimeRibKind
impl Unpin for LifetimeRibKind
impl UnwindSafe for LifetimeRibKind
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
Layout
Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...)
attributes. Please see the Rust Reference’s “Type Layout” chapter for details on type layout guarantees.
Size: 16 bytes
Size for each variant:
Item
: 0 bytesGenerics
: 15 bytesConstGeneric
: 0 bytesAnonConst
: 0 bytesAnonymousCreateParameter
: 7 bytesAnonymousReportError
: 0 bytesElided
: 15 bytesElisionFailure
: 0 bytes