Merge PR#544: Anonymous universes

1 files changed, 31 insertions, 1 deletions

diff --git a/test-suite/success/polymorphism.v b/test-suite/success/polymorphism.v
index 878875bd9..66ff55edc 100644
--- a/test-suite/success/polymorphism.v
+++ b/test-suite/success/polymorphism.v
@@ -321,4 +321,34 @@ Definition unwrap' := fun (X : Type) (b : box X) => let (unw) := b in unw.
 Fail Definition bad : False := TypeNeqSmallType.paradox (unwrap' Type (wrap _
 Type)) eq_refl.
 
-End Hurkens'.
\ No newline at end of file
+End Hurkens'.
+
+Module Anonymous.
+  Set Universe Polymorphism.
+
+  Definition defaultid := (fun x => x) : Type -> Type.
+  Definition collapseid := defaultid@{_ _}.
+  Check collapseid@{_}.
+
+  Definition anonid := (fun x => x) : Type -> Type@{_}.
+  Check anonid@{_}.
+
+  Definition defaultalg := (fun x : Type => x) (Type : Type).
+  Definition usedefaultalg := defaultalg@{_ _ _}.
+  Check usedefaultalg@{_ _}.
+
+  Definition anonalg := (fun x : Type@{_} => x) (Type : Type).
+  Check anonalg@{_ _}.
+
+  Definition unrelated@{i j} := nat.
+  Definition useunrelated := unrelated@{_ _}.
+  Check useunrelated@{_ _}.
+
+  Definition inthemiddle@{i j k} :=
+    let _ := defaultid@{i j} in
+    anonalg@{k j}.
+  (* i <= j < k *)
+  Definition collapsethemiddle := inthemiddle@{i _ j}.
+  Check collapsethemiddle@{_ _}.
+
+End Anonymous.