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Rollup merge of #92710 - jackh726:issue-92280, r=nikomatsakis

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Include Projections when elaborating TypeOutlives

Fixes #92280

In `Elaborator`, we elaborate that `Foo<<Bar as Baz>::Assoc>: 'a` -> `<Bar as Baz>::Assoc: 'a`. This is the same rule that would be applied to any other `Param`. If there are escaping vars, we continue to do nothing.

r? `@nikomatsakis`
This commit is contained in:
Matthias Krüger 2022-01-16 16:58:17 +01:00 • committed by GitHub
commit 9835b90c91
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6 changed files with 92 additions and 6 deletions
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4
compiler/rustc_trait_selection/src/traits/select/confirmation.rs
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@ -206,7 +206,9 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
})?);
if let ty::Projection(..) = placeholder_self_ty.kind() {
for predicate in tcx.predicates_of(def_id).instantiate_own(tcx, substs).predicates {
let predicates = tcx.predicates_of(def_id).instantiate_own(tcx, substs).predicates;
debug!(?predicates, "projection predicates");
for predicate in predicates {
let normalized = normalize_with_depth_to(
self,
obligation.param_env,