pub struct ConstrainOpaqueTypeRegionVisitor<'tcx, OP>{
pub tcx: TyCtxt<'tcx>,
pub op: OP,
}
Expand description
Visitor that requires that (almost) all regions in the type visited outlive
least_region
. We cannot use push_outlives_components
because regions in
closure signatures are not included in their outlives components. We need to
ensure all regions outlive the given bound so that we don’t end up with,
say, ReVar
appearing in a return type and causing ICEs when other
functions end up with region constraints involving regions from other
functions.
We also cannot use for_each_free_region
because for closures it includes
the regions parameters from the enclosing item.
We ignore any type parameters because impl trait values are assumed to capture all the in-scope type parameters.
Fields§
§tcx: TyCtxt<'tcx>
§op: OP
Trait Implementations§
source§impl<'tcx, OP> TypeVisitor<TyCtxt<'tcx>> for ConstrainOpaqueTypeRegionVisitor<'tcx, OP>
impl<'tcx, OP> TypeVisitor<TyCtxt<'tcx>> for ConstrainOpaqueTypeRegionVisitor<'tcx, OP>
fn visit_binder<T>(&mut self, t: &Binder<TyCtxt<'tcx>, T>)where
T: TypeVisitable<TyCtxt<'tcx>>,
fn visit_region(&mut self, r: Region<'tcx>)
fn visit_ty(&mut self, ty: Ty<'tcx>)
type Result = ()
fn visit_const(&mut self, c: <I as Interner>::Const) -> Self::Result
fn visit_predicate(&mut self, p: <I as Interner>::Predicate) -> Self::Result
fn visit_clauses(&mut self, p: <I as Interner>::Clauses) -> Self::Result
fn visit_error( &mut self, _guar: <I as Interner>::ErrorGuaranteed, ) -> Self::Result
Auto Trait Implementations§
impl<'tcx, OP> Freeze for ConstrainOpaqueTypeRegionVisitor<'tcx, OP>where
OP: Freeze,
impl<'tcx, OP> !RefUnwindSafe for ConstrainOpaqueTypeRegionVisitor<'tcx, OP>
impl<'tcx, OP> !Send for ConstrainOpaqueTypeRegionVisitor<'tcx, OP>
impl<'tcx, OP> !Sync for ConstrainOpaqueTypeRegionVisitor<'tcx, OP>
impl<'tcx, OP> Unpin for ConstrainOpaqueTypeRegionVisitor<'tcx, OP>where
OP: Unpin,
impl<'tcx, OP> !UnwindSafe for ConstrainOpaqueTypeRegionVisitor<'tcx, OP>
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
source§impl<T, R> CollectAndApply<T, R> for T
impl<T, R> CollectAndApply<T, R> for T
source§impl<T> Filterable for T
impl<T> Filterable for T
source§fn filterable(
self,
filter_name: &'static str,
) -> RequestFilterDataProvider<T, fn(_: DataRequest<'_>) -> bool>
fn filterable( self, filter_name: &'static str, ) -> RequestFilterDataProvider<T, fn(_: DataRequest<'_>) -> bool>
source§impl<T> Instrument for T
impl<T> Instrument for T
source§fn instrument(self, span: Span) -> Instrumented<Self>
fn instrument(self, span: Span) -> Instrumented<Self>
source§fn in_current_span(self) -> Instrumented<Self>
fn in_current_span(self) -> Instrumented<Self>
source§impl<T> IntoEither for T
impl<T> IntoEither for T
source§fn into_either(self, into_left: bool) -> Either<Self, Self>
fn into_either(self, into_left: bool) -> Either<Self, Self>
self
into a Left
variant of Either<Self, Self>
if into_left
is true
.
Converts self
into a Right
variant of Either<Self, Self>
otherwise. Read moresource§fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
self
into a Left
variant of Either<Self, Self>
if into_left(&self)
returns true
.
Converts self
into a Right
variant of Either<Self, Self>
otherwise. Read moresource§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<I, T, U> Upcast<I, U> for Twhere
U: UpcastFrom<I, T>,
impl<I, T, U> Upcast<I, U> for Twhere
U: UpcastFrom<I, T>,
source§impl<I, T> UpcastFrom<I, T> for T
impl<I, T> UpcastFrom<I, T> for T
fn upcast_from(from: T, _tcx: I) -> 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_error: &CycleError, _guar: ErrorGuaranteed, ) -> T
source§impl<T> WithSubscriber for T
impl<T> WithSubscriber for T
source§fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
source§fn with_current_subscriber(self) -> WithDispatch<Self>
fn with_current_subscriber(self) -> WithDispatch<Self>
impl<'a, T> Captures<'a> for Twhere
T: ?Sized,
impl<T> ErasedDestructor for Twhere
T: 'static,
impl<T> MaybeSendSync for T
Layout§
Note: Unable to compute type layout, possibly due to this type having generic parameters. Layout can only be computed for concrete, fully-instantiated types.