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internal: add implicit : Sized bound to type parameters.

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This commit is contained in:
Dawer 2021-09-07 12:36:15 +05:00
parent 3dae94bf2b
commit 9ce3c075ad
2 changed files with 34 additions and 11 deletions
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12
crates/hir_ty/src/lower.rs
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@ -1024,7 +1024,7 @@ pub(crate) fn generic_predicates_for_param_query(
let ctx =
TyLoweringContext::new(db, &resolver).with_type_param_mode(TypeParamLoweringMode::Variable);
let generics = generics(db.upcast(), param_id.parent);
resolver
let mut predicates: Vec<_> = resolver
.where_predicates_in_scope()
// we have to filter out all other predicates *first*, before attempting to lower them
.filter(|pred| match pred {
@ -1038,7 +1038,15 @@ pub(crate) fn generic_predicates_for_param_query(
WherePredicate::Lifetime { .. } => false,
})
.flat_map(|pred| ctx.lower_where_predicate(pred, true).map(|p| make_binders(&generics, p)))
.collect()
.collect();
let subst = generics.bound_vars_subst(DebruijnIndex::INNERMOST);
let explicitly_unsized_tys = ctx.unsized_types.into_inner();
let implicitly_sized_predicates =
implicitly_sized_clauses(db, param_id.parent, &explicitly_unsized_tys, &subst, &resolver)
.map(|p| make_binders(&generics, crate::wrap_empty_binders(p)));
predicates.extend(implicitly_sized_predicates);
predicates.into()
}
pub(crate) fn generic_predicates_for_param_recover(