Struct rustc_middle::ty::opaque_types::ReverseMapper

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

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

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

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>

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