article and descr for closures

2020-01-25 19:31:38 -06:00 · 2020-01-25 19:31:38 -06:00 · c6781037eb
commit c6781037eb
parent 66500effea
1 changed files with 5 additions and 4 deletions
--- a/src/librustc/ty/context.rs
+++ b/src/librustc/ty/context.rs
@ -1520,10 +1520,11 @@ impl<'tcx> TyCtxt<'tcx> {
                let kind = self.def_kind(def_id).unwrap();
                (kind.article(), kind.descr(def_id))
            }
-            DefPathData::ClosureExpr => {
-                // TODO
-                todo!();
-            }
+            DefPathData::ClosureExpr => match self.generator_kind(def_id) {
+                None => ("a", "closure"),
+                Some(rustc_hir::GeneratorKind::Async(..)) => ("an", "async closure"),
+                Some(rustc_hir::GeneratorKind::Gen) => ("a", "generator"),
+            },
            _ => bug!("article_and_description called on def_id {:?}", def_id),
        }
    }