pub struct ConstrainOpaqueTypeRegionVisitor<'tcx, OP: FnMut(Region<'tcx>)> {
    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.

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§tcx: TyCtxt<'tcx>§op: OP

Trait Implementations§

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impl<'tcx, OP> TypeVisitor<TyCtxt<'tcx>> for ConstrainOpaqueTypeRegionVisitor<'tcx, OP>
where OP: FnMut(Region<'tcx>),

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fn visit_binder<T: TypeVisitable<TyCtxt<'tcx>>>( &mut self, t: &Binder<'tcx, T> ) -> ControlFlow<Self::BreakTy>

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fn visit_region(&mut self, r: Region<'tcx>) -> ControlFlow<Self::BreakTy>

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fn visit_ty(&mut self, ty: Ty<'tcx>) -> ControlFlow<Self::BreakTy>

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type BreakTy = !

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fn visit_const( &mut self, c: <I as Interner>::Const ) -> ControlFlow<Self::BreakTy>

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fn visit_predicate( &mut self, p: <I as Interner>::Predicate ) -> ControlFlow<Self::BreakTy>

Auto Trait Implementations§

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impl<'tcx, OP> DynSend for ConstrainOpaqueTypeRegionVisitor<'tcx, OP>
where OP: DynSend,

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impl<'tcx, OP> DynSync for ConstrainOpaqueTypeRegionVisitor<'tcx, OP>
where OP: DynSync,

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impl<'tcx, OP> !RefUnwindSafe for ConstrainOpaqueTypeRegionVisitor<'tcx, OP>

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impl<'tcx, OP> !Send for ConstrainOpaqueTypeRegionVisitor<'tcx, OP>

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impl<'tcx, OP> !Sync for ConstrainOpaqueTypeRegionVisitor<'tcx, OP>

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impl<'tcx, OP> Unpin for ConstrainOpaqueTypeRegionVisitor<'tcx, OP>
where OP: Unpin,

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impl<'tcx, OP> !UnwindSafe for ConstrainOpaqueTypeRegionVisitor<'tcx, OP>

Blanket Implementations§

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impl<T> Aligned for T

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const ALIGN: Alignment = _

Alignment of Self.
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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T, R> CollectAndApply<T, R> for T

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fn collect_and_apply<I, F>(iter: I, f: F) -> R
where I: Iterator<Item = T>, F: FnOnce(&[T]) -> R,

Equivalent to f(&iter.collect::<Vec<_>>()).

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type Output = R

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impl<T> Filterable for T

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fn filterable( self, filter_name: &'static str ) -> RequestFilterDataProvider<T, fn(_: DataRequest<'_>) -> bool>

Creates a filterable data provider with the given name for debugging. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<P> IntoQueryParam<P> for P

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impl<T> MaybeResult<T> for T

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type Error = !

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fn from(_: Result<T, <T as MaybeResult<T>>::Error>) -> T

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fn to_result(self) -> Result<T, <T as MaybeResult<T>>::Error>

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impl<T> Pointable for T

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const ALIGN: usize = _

The alignment of pointer.
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type Init = T

The type for initializers.
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unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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impl<T> Same for T

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type Output = T

Should always be Self
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impl<'tcx, T> ToPredicate<'tcx, T> for T

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fn to_predicate(self, _tcx: TyCtxt<'tcx>) -> T

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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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fn vzip(self) -> V

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impl<Tcx, T> Value<Tcx> for T
where Tcx: DepContext,

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default fn from_cycle_error( tcx: Tcx, cycle_error: &CycleError, _guar: ErrorGuaranteed ) -> T

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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more
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impl<'a, T> Captures<'a> for T
where T: ?Sized,

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impl<T> ErasedDestructor for T
where T: 'static,

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Note: Unable to compute type layout, possibly due to this type having generic parameters. Layout can only be computed for concrete, fully-instantiated types.