Struct rustc_trait_selection::traits::project::PlaceholderReplacer

pub struct PlaceholderReplacer<'me, 'tcx> {
    infcx: &'me InferCtxt<'tcx>,
    mapped_regions: BTreeMap<PlaceholderRegion, BoundRegion>,
    mapped_types: BTreeMap<PlaceholderType, BoundTy>,
    mapped_consts: BTreeMap<PlaceholderConst<'tcx>, BoundVar>,
    universe_indices: &'me [Option<UniverseIndex>],
    current_index: DebruijnIndex,
}

The inverse of BoundVarReplacer: replaces placeholders with the bound vars from which they came.

Fields

infcx: &'me InferCtxt<'tcx>

mapped_regions: BTreeMap<PlaceholderRegion, BoundRegion>

mapped_types: BTreeMap<PlaceholderType, BoundTy>

mapped_consts: BTreeMap<PlaceholderConst<'tcx>, BoundVar>

universe_indices: &'me [Option<UniverseIndex>]

current_index: DebruijnIndex

Implementations

impl<'me, 'tcx> PlaceholderReplacer<'me, 'tcx>

pub fn replace_placeholders<T: TypeFoldable<'tcx>>(
    infcx: &'me InferCtxt<'tcx>,
    mapped_regions: BTreeMap<PlaceholderRegion, BoundRegion>,
    mapped_types: BTreeMap<PlaceholderType, BoundTy>,
    mapped_consts: BTreeMap<PlaceholderConst<'tcx>, BoundVar>,
    universe_indices: &'me [Option<UniverseIndex>],
    value: T
) -> T

Trait Implementations

impl<'tcx> TypeFolder<'tcx> for PlaceholderReplacer<'_, 'tcx>

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

fn fold_binder<T: TypeFoldable<'tcx>>(
    &mut self,
    t: Binder<'tcx, T>
) -> Binder<'tcx, T>

fn fold_region(&mut self, r0: 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_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: 104 bytes