pub enum ParamName {
Plain(Ident),
Fresh,
Error,
}
Variants§
Plain(Ident)
Some user-given name like T
or 'x
.
Fresh
Synthetic name generated when user elided a lifetime in an impl header.
E.g., the lifetimes in cases like these:
ⓘ
impl Foo for &u32
impl Foo<'_> for u32
in that case, we rewrite to
ⓘ
impl<'f> Foo for &'f u32
impl<'f> Foo<'f> for u32
where 'f
is something like Fresh(0)
. The indices are
unique per impl, but not necessarily continuous.
Error
Indicates an illegal name was given and an error has been
reported (so we should squelch other derived errors). Occurs
when, e.g., '_
is used in the wrong place.
Implementations§
Trait Implementations§
source§impl<__CTX> HashStable<__CTX> for ParamNamewhere
__CTX: HashStableContext,
impl<__CTX> HashStable<__CTX> for ParamNamewhere __CTX: HashStableContext,
fn hash_stable(&self, __hcx: &mut __CTX, __hasher: &mut StableHasher)
impl Copy for ParamName
Auto Trait Implementations§
impl RefUnwindSafe for ParamName
impl !Send for ParamName
impl !Sync for ParamName
impl Unpin for ParamName
impl UnwindSafe for ParamName
Blanket Implementations§
source§impl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for Twhere
T: Copy,
impl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for Twhere T: Copy,
fn allocate_on<'a>(self, arena: &'a Arena<'tcx>) -> &'a mut T
fn allocate_from_iter<'a>( arena: &'a Arena<'tcx>, iter: impl IntoIterator<Item = T> ) -> &'a mut [T]
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
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: 12 bytes
Size for each variant:
Plain
: 12 bytesFresh
: 0 bytesError
: 0 bytes