fix false positive for enum with no variants

2020-04-14 16:06:57 -07:00
parent c82e7696e6
commit 360bdf653b
3 changed files with 51 additions and 3 deletions
--- a/crates/ra_hir_ty/src/lib.rs
+++ b/crates/ra_hir_ty/src/lib.rs
@@ -680,6 +680,16 @@ impl Ty {
        }
    }

+    pub fn strip_references(&self) -> &Ty {
+        let mut t: &Ty = self;
+
+        while let Ty::Apply(ApplicationTy { ctor: TypeCtor::Ref(_mutability), parameters }) = t {
+            t = parameters.as_single();
+        }
+
+        t
+    }
+
    pub fn as_adt(&self) -> Option<(AdtId, &Substs)> {
        match self {
            Ty::Apply(ApplicationTy { ctor: TypeCtor::Adt(adt_def), parameters }) => {