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Stop calling impl_polarity when impl_trait_ref was also called

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This commit is contained in:
Oli Scherer
2024-02-10 22:27:03 +00:00
parent ab0e8b3145
commit b43fbe63e7
12 changed files with 96 additions and 77 deletions
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19
compiler/rustc_hir_analysis/src/astconv/mod.rs
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@@ -1671,9 +1671,9 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
.is_accessible_from(self.item_def_id(), tcx)
&& tcx.all_impls(*trait_def_id)
.any(|impl_def_id| {
let trait_ref = tcx.impl_trait_ref(impl_def_id);
trait_ref.is_some_and(|trait_ref| {
let impl_ = trait_ref.instantiate(
let impl_header = tcx.impl_trait_header(impl_def_id);
impl_header.is_some_and(|header| {
let header = header.instantiate(
tcx,
infcx.fresh_args_for_item(DUMMY_SP, impl_def_id),
);
@@ -1685,11 +1685,10 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
infcx
.can_eq(
ty::ParamEnv::empty(),
impl_.self_ty(),
header.trait_ref.self_ty(),
value,
)
) && header.polarity != ty::ImplPolarity::Negative
})
&& tcx.impl_polarity(impl_def_id) != ty::ImplPolarity::Negative
})
})
.map(|trait_def_id| tcx.def_path_str(trait_def_id))
@@ -1735,13 +1734,13 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
} else {
// Find all the types that have an `impl` for the trait.
tcx.all_impls(trait_def_id)
.filter(|impl_def_id| {
.filter_map(|impl_def_id| tcx.impl_trait_header(impl_def_id))
.filter(|header| {
// Consider only accessible traits
tcx.visibility(trait_def_id).is_accessible_from(self.item_def_id(), tcx)
&& tcx.impl_polarity(impl_def_id) != ty::ImplPolarity::Negative
&& header.skip_binder().polarity != ty::ImplPolarity::Negative
})
.filter_map(|impl_def_id| tcx.impl_trait_ref(impl_def_id))
.map(|impl_| impl_.instantiate_identity().self_ty())
.map(|header| header.instantiate_identity().trait_ref.self_ty())
// We don't care about blanket impls.
.filter(|self_ty| !self_ty.has_non_region_param())
.map(|self_ty| tcx.erase_regions(self_ty).to_string())