Enum rustc_hir::hir::LifetimeName
source · pub enum LifetimeName {
Param(LocalDefId, ParamName),
ImplicitObjectLifetimeDefault,
Error,
Infer,
Static,
}
Variants
Param(LocalDefId, ParamName)
User-given names or fresh (synthetic) names.
ImplicitObjectLifetimeDefault
Implicit lifetime in a context like dyn Foo
. This is
distinguished from implicit lifetimes elsewhere because the
lifetime that they default to must appear elsewhere within the
enclosing type. This means that, in an impl Trait
context, we
don’t have to create a parameter for them. That is, impl Trait<Item = &u32>
expands to an opaque type like type Foo<'a> = impl Trait<Item = &'a u32>
, but impl Trait<item = dyn Bar>
expands to type Foo = impl Trait<Item = dyn Bar + 'static>
. The latter uses ImplicitObjectLifetimeDefault
so
that surrounding code knows not to create a lifetime
parameter.
Error
Indicates an error during lowering (usually '_
in wrong place)
that was already reported.
Infer
User wrote an anonymous lifetime, either '_
or nothing.
The semantics of this lifetime should be inferred by typechecking code.
Static
User wrote 'static
.
Implementations
sourceimpl LifetimeName
impl LifetimeName
pub fn ident(&self) -> Ident
pub fn is_anonymous(&self) -> bool
pub fn is_elided(&self) -> bool
fn is_static(&self) -> bool
pub fn normalize_to_macros_2_0(&self) -> LifetimeName
Trait Implementations
sourceimpl Clone for LifetimeName
impl Clone for LifetimeName
sourcefn clone(&self) -> LifetimeName
fn clone(&self) -> LifetimeName
1.0.0 · sourcefn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresourceimpl Debug for LifetimeName
impl Debug for LifetimeName
sourceimpl Hash for LifetimeName
impl Hash for LifetimeName
sourceimpl<__CTX> HashStable<__CTX> for LifetimeNamewhere
__CTX: HashStableContext,
impl<__CTX> HashStable<__CTX> for LifetimeNamewhere
__CTX: HashStableContext,
fn hash_stable(&self, __hcx: &mut __CTX, __hasher: &mut StableHasher)
sourceimpl PartialEq<LifetimeName> for LifetimeName
impl PartialEq<LifetimeName> for LifetimeName
sourcefn eq(&self, other: &LifetimeName) -> bool
fn eq(&self, other: &LifetimeName) -> bool
impl Copy for LifetimeName
impl Eq for LifetimeName
impl StructuralEq for LifetimeName
impl StructuralPartialEq for LifetimeName
Auto Trait Implementations
impl RefUnwindSafe for LifetimeName
impl !Send for LifetimeName
impl !Sync for LifetimeName
impl Unpin for LifetimeName
impl UnwindSafe for LifetimeName
Blanket Implementations
sourceimpl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for Twhere
T: Copy,
impl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for Twhere
T: Copy,
fn allocate_on(self, arena: &'a Arena<'tcx>) -> &'a mut T
fn allocate_from_iter(
arena: &'a Arena<'tcx>,
iter: impl IntoIterator<Item = T>
) -> &'a mut [T]ⓘNotable traits for &[u8]impl Read for &[u8]impl Write for &mut [u8]
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:
Param
: 16 bytesImplicitObjectLifetimeDefault
: 0 bytesError
: 0 bytesInfer
: 0 bytesStatic
: 0 bytes