Struct rustc_middle::ty::opaque_types::ReverseMapper

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pub(super) struct ReverseMapper<'tcx> {
    tcx: TyCtxt<'tcx>,
    map: FxHashMap<GenericArg<'tcx>, GenericArg<'tcx>>,
    do_not_error: bool,
    ignore_errors: bool,
    span: Span,
}
Expand description

Converts generic params of a TypeFoldable from one item’s generics to another. Usually from a function’s generics list to the opaque type’s own generics.

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§tcx: TyCtxt<'tcx>§map: FxHashMap<GenericArg<'tcx>, GenericArg<'tcx>>§do_not_error: bool

see call sites to fold_kind_no_missing_regions_error for an explanation of this field.

§ignore_errors: bool

We do not want to emit any errors in typeck because the spans in typeck are subpar at the moment. Borrowck will do the same work again (this time with lifetime information) and thus report better errors.

§span: Span

Span of function being checked.

Implementations§

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impl<'tcx> ReverseMapper<'tcx>

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pub(super) fn new( tcx: TyCtxt<'tcx>, map: FxHashMap<GenericArg<'tcx>, GenericArg<'tcx>>, span: Span, ignore_errors: bool, ) -> Self

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fn fold_kind_no_missing_regions_error( &mut self, kind: GenericArg<'tcx>, ) -> GenericArg<'tcx>

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fn fold_kind_normally(&mut self, kind: GenericArg<'tcx>) -> GenericArg<'tcx>

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fn fold_closure_args( &mut self, def_id: DefId, args: GenericArgsRef<'tcx>, ) -> GenericArgsRef<'tcx>

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impl<'tcx> TypeFolder<TyCtxt<'tcx>> for ReverseMapper<'tcx>

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fn interner(&self) -> TyCtxt<'tcx>

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fn fold_region(&mut self, r: Region<'tcx>) -> Region<'tcx>

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fn fold_ty(&mut self, ty: Ty<'tcx>) -> Ty<'tcx>

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fn fold_const(&mut self, ct: Const<'tcx>) -> Const<'tcx>

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fn fold_binder<T>(&mut self, t: Binder<I, T>) -> Binder<I, T>
where T: TypeFoldable<I>,

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fn fold_predicate( &mut self, p: <I as Interner>::Predicate, ) -> <I as Interner>::Predicate

Auto Trait Implementations§

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impl<'tcx> DynSend for ReverseMapper<'tcx>

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impl<'tcx> DynSync for ReverseMapper<'tcx>

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impl<'tcx> Freeze for ReverseMapper<'tcx>

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impl<'tcx> !RefUnwindSafe for ReverseMapper<'tcx>

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impl<'tcx> !Send for ReverseMapper<'tcx>

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impl<'tcx> !Sync for ReverseMapper<'tcx>

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impl<'tcx> Unpin for ReverseMapper<'tcx>

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impl<'tcx> !UnwindSafe for ReverseMapper<'tcx>

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<I, F> FallibleTypeFolder<I> for F
where I: Interner, F: TypeFolder<I>,

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type Error = !

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fn interner(&self) -> I

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fn try_fold_binder<T>(&mut self, t: Binder<I, T>) -> Result<Binder<I, T>, !>
where T: TypeFoldable<I>,

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fn try_fold_ty( &mut self, t: <I as Interner>::Ty, ) -> Result<<I as Interner>::Ty, !>

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fn try_fold_region( &mut self, r: <I as Interner>::Region, ) -> Result<<I as Interner>::Region, !>

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fn try_fold_const( &mut self, c: <I as Interner>::Const, ) -> Result<<I as Interner>::Const, !>

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fn try_fold_predicate( &mut self, p: <I as Interner>::Predicate, ) -> Result<<I as Interner>::Predicate, !>

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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<T> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts 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 more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts 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 more
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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<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<I, T, U> Upcast<I, U> for T
where U: UpcastFrom<I, T>,

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fn upcast(self, interner: I) -> U

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impl<I, T> UpcastFrom<I, T> for T

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fn upcast_from(from: T, _tcx: I) -> T

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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: 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: 56 bytes