Struct rustc_middle::ty::opaque_types::ReverseMapper
source · 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.
Fields§
§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§
source§impl<'tcx> ReverseMapper<'tcx>
impl<'tcx> ReverseMapper<'tcx>
pub(super) fn new(
tcx: TyCtxt<'tcx>,
map: FxHashMap<GenericArg<'tcx>, GenericArg<'tcx>>,
span: Span,
ignore_errors: bool
) -> Self
fn fold_kind_no_missing_regions_error(
&mut self,
kind: GenericArg<'tcx>
) -> GenericArg<'tcx>
fn fold_kind_normally(&mut self, kind: GenericArg<'tcx>) -> GenericArg<'tcx>
Trait Implementations§
source§impl<'tcx> TypeFolder<'tcx> for ReverseMapper<'tcx>
impl<'tcx> TypeFolder<'tcx> for ReverseMapper<'tcx>
fn tcx(&self) -> TyCtxt<'tcx>
fn fold_region(&mut self, r: Region<'tcx>) -> Region<'tcx>
fn fold_ty(&mut self, ty: Ty<'tcx>) -> Ty<'tcx>
fn fold_const(&mut self, ct: Const<'tcx>) -> Const<'tcx>
fn fold_binder<T>(&mut self, t: Binder<'tcx, T>) -> Binder<'tcx, T>where
T: TypeFoldable<'tcx>,
fn fold_predicate(&mut self, p: Predicate<'tcx>) -> Predicate<'tcx>
Auto Trait Implementations§
impl<'tcx> !RefUnwindSafe for ReverseMapper<'tcx>
impl<'tcx> !Send for ReverseMapper<'tcx>
impl<'tcx> !Sync for ReverseMapper<'tcx>
impl<'tcx> Unpin for ReverseMapper<'tcx>
impl<'tcx> !UnwindSafe for ReverseMapper<'tcx>
Blanket Implementations§
source§impl<'tcx, F> FallibleTypeFolder<'tcx> for Fwhere
F: TypeFolder<'tcx>,
impl<'tcx, F> FallibleTypeFolder<'tcx> for Fwhere
F: TypeFolder<'tcx>,
type Error = !
fn tcx<'a>(&'a self) -> TyCtxt<'tcx>
fn try_fold_binder<T>(
&mut self,
t: Binder<'tcx, T>
) -> Result<Binder<'tcx, T>, !>where
T: TypeFoldable<'tcx>,
fn try_fold_ty(&mut self, t: Ty<'tcx>) -> Result<Ty<'tcx>, !>
fn try_fold_region(&mut self, r: Region<'tcx>) -> Result<Region<'tcx>, !>
fn try_fold_const(&mut self, c: Const<'tcx>) -> Result<Const<'tcx>, !>
fn try_fold_predicate(
&mut self,
p: Predicate<'tcx>
) -> Result<Predicate<'tcx>, !>
source§impl<T, R> InternIteratorElement<T, R> for T
impl<T, R> InternIteratorElement<T, R> for T
type Output = R
fn intern_with<I, F>(iter: I, f: F) -> <T as InternIteratorElement<T, R>>::Outputwhere
I: Iterator<Item = T>,
F: FnOnce(&[T]) -> R,
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, _: &[QueryInfo]) -> 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