wip lower impl trait to type args

2020-01-24 19:35:09 +01:00
parent 9dec65d3b1
commit 93aa166748
8 changed files with 97 additions and 14 deletions
--- a/crates/ra_hir_ty/src/utils.rs
+++ b/crates/ra_hir_ty/src/utils.rs
@@ -127,7 +127,8 @@ impl Generics {
        self.find_param(param).0
    }
    pub(crate) fn param_name(&self, param: TypeParamId) -> Name {
-        self.find_param(param).1.name.clone()
+        // FIXME make this return Option
+        self.find_param(param).1.name.clone().unwrap_or_else(Name::missing)
    }
    fn find_param(&self, param: TypeParamId) -> (u32, &TypeParamData) {
        if param.parent == self.def {