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Rollup merge of #104595 - compiler-errors:poly-existential-predicate, r=lcnr

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Add `PolyExistentialPredicate` type alias

Wrapping `ExistentialPredicate`s in a binder is very common, and this alias already exists for the `PolyExistential{TraitRef,Projection}` types.
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Matthias Krüger 2022-11-21 14:11:11 +01:00 • committed by GitHub
commit 844e3fb928
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20 changed files with 48 additions and 53 deletions
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4
compiler/rustc_trait_selection/src/traits/wf.rs
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@ -758,7 +758,7 @@ impl<'tcx> WfPredicates<'tcx> {
fn from_object_ty(
&mut self,
ty: Ty<'tcx>,
data: &'tcx ty::List<ty::Binder<'tcx, ty::ExistentialPredicate<'tcx>>>,
data: &'tcx ty::List<ty::PolyExistentialPredicate<'tcx>>,
region: ty::Region<'tcx>,
) {
// Imagine a type like this:
@ -822,7 +822,7 @@ impl<'tcx> WfPredicates<'tcx> {
/// `infer::required_region_bounds`, see that for more information.
pub fn object_region_bounds<'tcx>(
tcx: TyCtxt<'tcx>,
existential_predicates: &'tcx ty::List<ty::Binder<'tcx, ty::ExistentialPredicate<'tcx>>>,
existential_predicates: &'tcx ty::List<ty::PolyExistentialPredicate<'tcx>>,
) -> Vec<ty::Region<'tcx>> {
// Since we don't actually *know* the self type for an object,
// this "open(err)" serves as a kind of dummy standin -- basically