Struct rustc_traits::chalk::lowering::ParamsSubstitutor
source · 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>,
}
Expand description
Used to substitute Param
s with placeholders. We do this since Chalk
have a notion of Param
s.
Fields
tcx: TyCtxt<'tcx>
binder_index: DebruijnIndex
list: Vec<ParamTy>
next_ty_placeholder: usize
params: FxHashMap<usize, ParamTy>
named_regions: BTreeMap<DefId, u32>
Implementations
Trait Implementations
sourceimpl<'tcx> TypeFolder<'tcx> for ParamsSubstitutor<'tcx>
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_unevaluated(
&mut self,
uv: Unevaluated<'tcx, Option<Promoted>>
) -> Unevaluated<'tcx, Option<Promoted>>
fn fold_predicate(&mut self, p: Predicate<'tcx>) -> Predicate<'tcx>
fn fold_mir_const(&mut self, c: ConstantKind<'tcx>) -> ConstantKind<'tcx>
Auto Trait Implementations
impl<'tcx> !RefUnwindSafe for ParamsSubstitutor<'tcx>
impl<'tcx> !Send for ParamsSubstitutor<'tcx>
impl<'tcx> !Sync for ParamsSubstitutor<'tcx>
impl<'tcx> Unpin for ParamsSubstitutor<'tcx>
impl<'tcx> !UnwindSafe for ParamsSubstitutor<'tcx>
Blanket Implementations
sourceimpl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
const: unstable · sourcefn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
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