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Filter out error predicates in type bounds as well

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This commit is contained in:
Florian Diebold 2019-12-21 19:15:06 +01:00
parent 4053fcfca0
commit 1f7f4578f7
2 changed files with 29 additions and 2 deletions
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17
crates/ra_hir_ty/src/tests/traits.rs
View file

@ -958,6 +958,23 @@ fn test() {
);
}
#[test]
fn error_bound_chalk() {
let t = type_at(
r#"
//- /main.rs
trait Trait {
fn foo(&self) -> u32 {}
}
fn test(x: (impl Trait + UnknownTrait)) {
x.foo()<|>;
}
"#,
);
assert_eq!(t, "u32");
}
#[test]
fn assoc_type_bindings() {
assert_snapshot!(

14
crates/ra_hir_ty/src/traits/chalk.rs
View file

@ -129,12 +129,22 @@ impl ToChalk for Ty {
Ty::Bound(idx) => chalk_ir::TyData::BoundVar(idx as usize).intern(),
Ty::Infer(_infer_ty) => panic!("uncanonicalized infer ty"),
Ty::Dyn(predicates) => {
let where_clauses = predicates.iter().cloned().map(|p| p.to_chalk(db)).collect();
let where_clauses = predicates
.iter()
.filter(|p| !p.is_error())
.cloned()
.map(|p| p.to_chalk(db))
.collect();
let bounded_ty = chalk_ir::BoundedTy { bounds: make_binders(where_clauses, 1) };
chalk_ir::TyData::Dyn(bounded_ty).intern()
}
Ty::Opaque(predicates) => {
let where_clauses = predicates.iter().cloned().map(|p| p.to_chalk(db)).collect();
let where_clauses = predicates
.iter()
.filter(|p| !p.is_error())
.cloned()
.map(|p| p.to_chalk(db))
.collect();
let bounded_ty = chalk_ir::BoundedTy { bounds: make_binders(where_clauses, 1) };
chalk_ir::TyData::Opaque(bounded_ty).intern()
}