Struct rustc_traits::chalk::lowering::ParamsSubstitutor

pub(crate) struct ParamsSubstitutor<'tcx> {
    tcx: TyCtxt<'tcx>,
    binder_index: DebruijnIndex,
    list: Vec<ParamTy>,
    next_ty_placeholder: usize,
    pub(crate) params: FxHashMap<usize, ParamTy>,
    pub(crate) named_regions: BTreeMap<DefId, u32>,
}

Used to substitute Params with placeholders. We do this since Chalk have a notion of Params.

Fields

tcx: TyCtxt<'tcx>

binder_index: DebruijnIndex

list: Vec<ParamTy>

next_ty_placeholder: usize

params: FxHashMap<usize, ParamTy>

named_regions: BTreeMap<DefId, u32>

Implementations

impl<'tcx> ParamsSubstitutor<'tcx>

pub(crate) fn new(tcx: TyCtxt<'tcx>, next_ty_placeholder: usize) -> Self

Trait Implementations

impl<'tcx> TypeFolder<'tcx> for ParamsSubstitutor<'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_ty(&mut self, t: Ty<'tcx>) -> Ty<'tcx>

fn fold_region(&mut self, r: Region<'tcx>) -> Region<'tcx>

fn fold_const(&mut self, c: 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