Struct rustc_middle::ty::visit::LateBoundRegionsCollector
source · struct LateBoundRegionsCollector {
current_index: DebruijnIndex,
regions: FxHashSet<BoundRegionKind>,
just_constrained: bool,
}
Expand description
Collects all the late-bound regions at the innermost binding level into a hash set.
Fields§
§current_index: DebruijnIndex
§regions: FxHashSet<BoundRegionKind>
§just_constrained: bool
true
if we only want regions that are known to be
“constrained” when you equate this type with another type. In
particular, if you have e.g., &'a u32
and &'b u32
, equating
them constraints 'a == 'b
. But if you have <&'a u32 as Trait>::Foo
and <&'b u32 as Trait>::Foo
, normalizing those
types may mean that 'a
and 'b
don’t appear in the results,
so they are not considered constrained.
Implementations§
Trait Implementations§
source§impl<'tcx> TypeVisitor<TyCtxt<'tcx>> for LateBoundRegionsCollector
impl<'tcx> TypeVisitor<TyCtxt<'tcx>> for LateBoundRegionsCollector
fn visit_binder<T: TypeVisitable<TyCtxt<'tcx>>>( &mut self, t: &Binder<'tcx, T> ) -> ControlFlow<Self::BreakTy>
fn visit_ty(&mut self, t: Ty<'tcx>) -> ControlFlow<Self::BreakTy>
fn visit_const(&mut self, c: Const<'tcx>) -> ControlFlow<Self::BreakTy>
fn visit_region(&mut self, r: Region<'tcx>) -> ControlFlow<Self::BreakTy>
type BreakTy = !
Auto Trait Implementations§
impl RefUnwindSafe for LateBoundRegionsCollector
impl Send for LateBoundRegionsCollector
impl Sync for LateBoundRegionsCollector
impl Unpin for LateBoundRegionsCollector
impl UnwindSafe for LateBoundRegionsCollector
Blanket Implementations§
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
source§impl<T, R> CollectAndApply<T, R> for T
impl<T, R> CollectAndApply<T, R> for T
source§impl<P> IntoQueryParam<P> for P
impl<P> IntoQueryParam<P> for P
fn into_query_param(self) -> P
source§impl<T> MaybeResult<T> for T
impl<T> MaybeResult<T> for T
source§impl<'tcx, T> ToPredicate<'tcx, T> for T
impl<'tcx, T> ToPredicate<'tcx, T> for T
fn to_predicate(self, _tcx: TyCtxt<'tcx>) -> T
source§impl<Tcx, T> Value<Tcx> for Twhere
Tcx: DepContext,
impl<Tcx, T> Value<Tcx> for Twhere Tcx: DepContext,
default fn from_cycle_error( tcx: Tcx, cycle: &[QueryInfo], _guar: ErrorGuaranteed ) -> 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: 40 bytes