Le calcul de la classe dans class_args_of ne suivait pas celui de class_of

(avec comme conséquence des échecs en cas de beta-redex - cf coercions.v).
Allègements triviaux dans coercion.ml en passant.


git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@9257 85f007b7-540e-0410-9357-904b9bb8a0f7

1 files changed, 20 insertions, 1 deletions

diff --git a/test-suite/success/coercions.v b/test-suite/success/coercions.v
index 750165a55a..d652132e49 100644
--- a/test-suite/success/coercions.v
+++ b/test-suite/success/coercions.v
@@ -31,7 +31,7 @@ Parameter C:> forall n:nat, A n -> nat.
 *)
 
 (* Check coercion between products based on eta-expansion *)
-(* (there was a de Bruijn bug until rev ) *)
+(* (there was a de Bruijn bug until rev 9254) *)
 
 Section P.
 
@@ -42,3 +42,22 @@ Variable G :> forall x, C x -> D x.
 Check fun (H : forall y:E, y = y -> C y) => (H : forall y:E, y = y -> D y).
 
 End P.
+
+(* Check that class arguments are computed the same when looking for a
+   coercion and when applying it (class_args_of) (failed until rev 9255) *)
+
+Section Q.
+
+Variable bool : Set.
+Variables C D : bool -> Prop.
+Variable G :> forall x, C x -> D x.
+Variable f : nat -> bool.
+
+Definition For_all (P : nat -> Prop) := forall x, P x.
+
+Check fun (H : For_all (fun x => C (f x))) => H : forall x, D (f x).
+Check fun (H : For_all (fun x => C (f x))) x => H x : D (f x).
+Check fun (H : For_all (fun x => C (f x))) => H : For_all (fun x => D (f x)).
+
+End Q.
+