Note that trait aliases cannot be recursive

2021-08-21 14:19:59 -07:00
parent bf360dc272
commit c861964735
3 changed files with 21 additions and 9 deletions
--- a/compiler/rustc_query_impl/src/keys.rs
+++ b/compiler/rustc_query_impl/src/keys.rs
@@ -178,6 +178,10 @@ impl Key for (DefId, Option<Ident>) {
    fn default_span(&self, tcx: TyCtxt<'_>) -> Span {
        tcx.def_span(self.0)
    }
+    #[inline(always)]
+    fn key_as_def_id(&self) -> Option<DefId> {
+        Some(self.0)
+    }
 }

 impl Key for (DefId, LocalDefId, Ident) {