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>

Trait Implementations§

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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: <I as Interner>::Binder<T> ) -> <I as Interner>::Binder<T>where T: TypeFoldable<I>, <I as Interner>::Binder<T>: TypeSuperFoldable<I>,

Auto Trait Implementations§

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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 Twhere 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 Twhere 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 Twhere 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) -> Rwhere 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 Fwhere 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: <I as Interner>::Binder<T> ) -> Result<<I as Interner>::Binder<T>, !>where T: TypeFoldable<I>, <I as Interner>::Binder<T>: TypeSuperFoldable<I>,

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

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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, !>where <I as Interner>::Const: TypeSuperFoldable<I>,

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

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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, U> Into<U> for Twhere 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<'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 Twhere 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 Twhere 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<Tcx, T> Value<Tcx> for Twhere Tcx: DepContext,

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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: 56 bytes