Struct rustc_trait_selection::traits::project::BoundVarReplacer

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

Fields

infcx: &'me InferCtxt<'me, 'tcx>

mapped_regions: BTreeMap<PlaceholderRegion, BoundRegion>

mapped_types: BTreeMap<PlaceholderType, BoundTy>

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

current_index: DebruijnIndex

universe_indices: &'me mut Vec<Option<UniverseIndex>>

Implementations

impl<'me, 'tcx> BoundVarReplacer<'me, 'tcx>

pub fn replace_bound_vars<T: TypeFoldable<'tcx>>(
    infcx: &'me InferCtxt<'me, 'tcx>,
    universe_indices: &'me mut Vec<Option<UniverseIndex>>,
    value: T
) -> (T, BTreeMap<PlaceholderRegion, BoundRegion>, BTreeMap<PlaceholderType, BoundTy>, BTreeMap<PlaceholderConst<'tcx>, BoundVar>)

Returns Some if we were able to replace bound vars. If there are any bound vars that use a binding level above universe_indices.len(), we fail.

fn universe_for(&mut self, debruijn: DebruijnIndex) -> UniverseIndex

Trait Implementations

impl<'tcx> TypeFolder<'tcx> for BoundVarReplacer<'_, '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, r: Region<'tcx>) -> Region<'tcx>

fn fold_ty(&mut self, t: Ty<'tcx>) -> Ty<'tcx>

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

type Error = !

fn fold_predicate(&mut self, p: Predicate) -> Predicate where
    Self: TypeFolder<'tcx, Error = !>, 

fn fold_mir_const(&mut self, c: ConstantKind) -> ConstantKind where
    Self: TypeFolder<'tcx, Error = !>, 

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: 96 bytes