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Make predicate filter in probe_ty_param_bounds_in_generics more explicit

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This commit is contained in:
Michael Goulet 2024-10-26 19:01:27 +00:00
parent 75eff9a574
commit ac67d295b9
1 changed files with 17 additions and 17 deletions
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34
compiler/rustc_hir_analysis/src/collect/predicates_of.rs
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@ -606,12 +606,8 @@ pub(super) fn implied_predicates_with_filter<'tcx>(
let mut bounds = Bounds::default();
icx.lowerer().lower_bounds(self_param_ty, superbounds, &mut bounds, ty::List::empty(), filter);
let where_bounds_that_match = icx.probe_ty_param_bounds_in_generics(
generics,
item.owner_id.def_id,
self_param_ty,
filter,
);
let where_bounds_that_match =
icx.probe_ty_param_bounds_in_generics(generics, item.owner_id.def_id, filter);
// Combine the two lists to form the complete set of superbounds:
let implied_bounds =
@ -768,7 +764,6 @@ pub(super) fn type_param_predicates<'tcx>(
}
use rustc_hir::*;
use rustc_middle::ty::Ty;
// In the HIR, bounds can derive from two places. Either
// written inline like `<T: Foo>` or in a where-clause like
@ -778,7 +773,6 @@ pub(super) fn type_param_predicates<'tcx>(
let param_owner = tcx.hir().ty_param_owner(def_id);
let generics = tcx.generics_of(param_owner);
let index = generics.param_def_id_to_index[&def_id.to_def_id()];
let ty = Ty::new_param(tcx, index, tcx.hir().ty_param_name(def_id));
// Don't look for bounds where the type parameter isn't in scope.
let parent = if item_def_id == param_owner {
@ -815,7 +809,6 @@ pub(super) fn type_param_predicates<'tcx>(
icx.probe_ty_param_bounds_in_generics(
hir_generics,
def_id,
ty,
PredicateFilter::SelfThatDefines(assoc_name),
)
.into_iter()
@ -841,7 +834,6 @@ fn probe_ty_param_bounds_in_generics(
&self,
hir_generics: &'tcx hir::Generics<'tcx>,
param_def_id: LocalDefId,
ty: Ty<'tcx>,
filter: PredicateFilter,
) -> Vec<(ty::Clause<'tcx>, Span)> {
let mut bounds = Bounds::default();
@ -851,13 +843,21 @@ fn probe_ty_param_bounds_in_generics(
continue;
};
let bound_ty = if predicate.is_param_bound(param_def_id.to_def_id()) {
ty
} else if matches!(filter, PredicateFilter::All) {
self.lowerer().lower_ty_maybe_return_type_notation(predicate.bounded_ty)
} else {
continue;
};
match filter {
_ if predicate.is_param_bound(param_def_id.to_def_id()) => {
// Ok
}
PredicateFilter::All => {
// Ok
}
PredicateFilter::SelfOnly
| PredicateFilter::SelfThatDefines(_)
| PredicateFilter::SelfConstIfConst
| PredicateFilter::SelfAndAssociatedTypeBounds => continue,
PredicateFilter::ConstIfConst => unreachable!(),
}
let bound_ty = self.lowerer().lower_ty_maybe_return_type_notation(predicate.bounded_ty);
let bound_vars = self.tcx.late_bound_vars(predicate.hir_id);
self.lowerer().lower_bounds(