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Auto merge of #87375 - fee1-dead:move-constness-to-traitpred, r=oli-obk

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Try filtering out non-const impls when we expect const impls

**TL;DR**: Associated types on const impls are now bounded; we now disallow calling a const function with bounds when the specified type param only has a non-const impl.

r? `@oli-obk`
This commit is contained in:
bors 2021-08-14 12:06:34 +00:00
commit 136eaa1b25
68 changed files with 517 additions and 211 deletions
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2
compiler/rustc_lint/src/traits.rs
View file

@ -87,7 +87,7 @@ impl<'tcx> LateLintPass<'tcx> for DropTraitConstraints {
let predicates = cx.tcx.explicit_predicates_of(item.def_id);
for &(predicate, span) in predicates.predicates {
let trait_predicate = match predicate.kind().skip_binder() {
Trait(trait_predicate, _constness) => trait_predicate,
Trait(trait_predicate) => trait_predicate,
_ => continue,
};
let def_id = trait_predicate.trait_ref.def_id;

2
compiler/rustc_lint/src/unused.rs
View file

@ -211,7 +211,7 @@ impl<'tcx> LateLintPass<'tcx> for UnusedResults {
let mut has_emitted = false;
for &(predicate, _) in cx.tcx.explicit_item_bounds(def) {
// We only look at the `DefId`, so it is safe to skip the binder here.
if let ty::PredicateKind::Trait(ref poly_trait_predicate, _) =
if let ty::PredicateKind::Trait(ref poly_trait_predicate) =
predicate.kind().skip_binder()
{
let def_id = poly_trait_predicate.trait_ref.def_id;