bjoernager/rust
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Add polarity to TraitPredicate

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This commit is contained in:
Santiago Pastorino 2021-10-11 18:10:35 -03:00
parent 72d66064e7
commit 6975afd141
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GPG key ID: 8131A24E0C79EFAF
15 changed files with 105 additions and 12 deletions
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2
compiler/rustc_trait_selection/src/traits/auto_trait.rs
View file

@ -286,6 +286,8 @@ impl AutoTraitFinder<'tcx> {
substs: infcx.tcx.mk_substs_trait(ty, &[]),
},
constness: ty::BoundConstness::NotConst,
// Auto traits are positive
polarity: ty::ImplPolarity::Positive,
}));
let computed_preds = param_env.caller_bounds().iter();

1
compiler/rustc_trait_selection/src/traits/mod.rs
View file

@ -804,6 +804,7 @@ pub fn vtable_trait_upcasting_coercion_new_vptr_slot(
ty::Binder::dummy(ty::TraitPredicate {
trait_ref,
constness: ty::BoundConstness::NotConst,
polarity: ty::ImplPolarity::Positive,
}),
);

1
compiler/rustc_trait_selection/src/traits/relationships.rs
View file

@ -44,6 +44,7 @@ pub(crate) fn update<'tcx, T>(
ty::PredicateKind::Trait(ty::TraitPredicate {
trait_ref,
constness: predicate.constness,
polarity: predicate.polarity,
})
})
.to_predicate(infcx.tcx),

1
compiler/rustc_trait_selection/src/traits/select/candidate_assembly.rs
View file

@ -915,6 +915,7 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
substs: self.tcx().mk_substs_trait(ty, &[]),
},
constness: ty::BoundConstness::NotConst,
polarity: ty::ImplPolarity::Positive,
}));
copy_obligation.recursion_depth = depth + 1;
self.assemble_candidates_from_impls(&copy_obligation, &mut copy_candidates);