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Be more resilient to bad language item definitions in binop inference

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Laurențiu Nicola 2024-08-14 14:38:39 +03:00
parent 78c2bdce86
commit e37df4cd24
2 changed files with 45 additions and 9 deletions
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21
crates/hir-ty/src/infer/expr.rs
View file

@ -793,11 +793,12 @@ impl InferenceContext<'_> {
.trait_data(index_trait)
.method_by_name(&Name::new_symbol_root(sym::index.clone()))
{
let substs = TyBuilder::subst_for_def(self.db, index_trait, None)
.push(self_ty.clone())
.push(index_ty.clone())
.build();
self.write_method_resolution(tgt_expr, func, substs);
let subst = TyBuilder::subst_for_def(self.db, index_trait, None);
if subst.remaining() != 2 {
return self.err_ty();
}
let subst = subst.push(self_ty.clone()).push(index_ty.clone()).build();
self.write_method_resolution(tgt_expr, func, subst);
}
let assoc = self.resolve_ops_index_output();
let res = self.resolve_associated_type_with_params(
@ -1295,10 +1296,12 @@ impl InferenceContext<'_> {
// HACK: We can use this substitution for the function because the function itself doesn't
// have its own generic parameters.
let subst = TyBuilder::subst_for_def(self.db, trait_, None)
.push(lhs_ty.clone())
.push(rhs_ty.clone())
.build();
let subst = TyBuilder::subst_for_def(self.db, trait_, None);
if subst.remaining() != 2 {
return Ty::new(Interner, TyKind::Error);
}
let subst = subst.push(lhs_ty.clone()).push(rhs_ty.clone()).build();
self.write_method_resolution(tgt_expr, func, subst.clone());
let method_ty = self.db.value_ty(func.into()).unwrap().substitute(Interner, &subst);

33
crates/hir-ty/src/tests/simple.rs
View file

@ -3686,3 +3686,36 @@ fn main() {
"#,
);
}
#[test]
fn infer_bad_lang_item() {
check_infer(
r#"
#[lang="eq"]
pub trait Eq {
fn eq(&self, ) -> bool;
}
#[lang="shr"]
pub trait Shr<RHS,Result> {
fn shr(&self, rhs: &RHS) -> Result;
}
fn test() -> bool {
1 >> 1;
1 == 1;
}
"#,
expect![[r#"
39..43 'self': &'? Self
114..118 'self': &'? Self
120..123 'rhs': &'? RHS
163..190 '{ ...= 1; }': bool
169..170 '1': i32
169..175 '1 >> 1': {unknown}
181..182 '1': i32
181..187 '1 == 1': {unknown}
"#]],
);
}