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Use != Positive rather than == Negative

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Feels more complete, and for ImplPolarity has the side-effect of making
sure we also handle reservation impls correctly
This commit is contained in:
Michael Goulet 2024-03-21 15:46:40 -04:00
parent 4b87c0b9c9
commit 127e42d33b
6 changed files with 6 additions and 6 deletions
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2
compiler/rustc_hir_analysis/src/hir_ty_lowering/mod.rs
View File

@ -710,7 +710,7 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ {
// Don't register additional associated type bounds for negative bounds,
// since we should have emitten an error for them earlier, and they will
// not be well-formed!
if polarity == ty::PredicatePolarity::Negative {
if polarity != ty::PredicatePolarity::Positive {
assert!(
self.tcx().dcx().has_errors().is_some(),
"negative trait bounds should not have bindings",

2
compiler/rustc_hir_typeck/src/method/suggest.rs
View File

@ -3367,7 +3367,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
"inherent impls can't be candidates, only trait impls can be",
)
})
.filter(|header| header.polarity == ty::ImplPolarity::Negative)
.filter(|header| header.polarity != ty::ImplPolarity::Positive)
.any(|header| {
let imp = header.trait_ref.instantiate_identity();
let imp_simp =

2
compiler/rustc_infer/src/traits/util.rs
View File

@ -270,7 +270,7 @@ impl<'tcx, O: Elaboratable<'tcx>> Elaborator<'tcx, O> {
match bound_clause.skip_binder() {
ty::ClauseKind::Trait(data) => {
// Negative trait bounds do not imply any supertrait bounds
if data.polarity == ty::PredicatePolarity::Negative {
if data.polarity != ty::PredicatePolarity::Positive {
return;
}
// Get predicates implied by the trait, or only super predicates if we only care about self predicates.

2
compiler/rustc_trait_selection/src/traits/auto_trait.rs
View File

@ -295,7 +295,7 @@ impl<'tcx> AutoTraitFinder<'tcx> {
}) = impl_source
{
// Blame 'tidy' for the weird bracket placement.
if infcx.tcx.impl_polarity(*impl_def_id) == ty::ImplPolarity::Negative {
if infcx.tcx.impl_polarity(*impl_def_id) != ty::ImplPolarity::Positive {
debug!(
"evaluate_nested_obligations: found explicit negative impl\
{:?}, bailing out",

2
compiler/rustc_trait_selection/src/traits/error_reporting/suggestions.rs
View File

@ -245,7 +245,7 @@ impl<'tcx> TypeErrCtxt<'_, 'tcx> {
associated_ty: Option<(&'static str, Ty<'tcx>)>,
mut body_id: LocalDefId,
) {
if trait_pred.skip_binder().polarity == ty::PredicatePolarity::Negative {
if trait_pred.skip_binder().polarity != ty::PredicatePolarity::Positive {
return;
}

2
compiler/rustc_trait_selection/src/traits/error_reporting/type_err_ctxt_ext.rs
View File

@ -1907,7 +1907,7 @@ impl<'tcx> TypeErrCtxt<'_, 'tcx> {
.all_impls(trait_pred.def_id())
.filter_map(|def_id| {
let imp = self.tcx.impl_trait_header(def_id).unwrap();
if imp.polarity == ty::ImplPolarity::Negative
if imp.polarity != ty::ImplPolarity::Positive
|| !self.tcx.is_user_visible_dep(def_id.krate)
{
return None;