diff options
| author |  Pierre-Marie Pédrot <pierre-marie.pedrot@inria.fr> | 2015-07-28 17:32:30 +0200 |
|---|---|---|
| committer | Pierre-Marie Pédrot <pierre-marie.pedrot@inria.fr> | 2015-07-28 17:32:30 +0200 |
| commit | 524bff66f40908dc3d17b6a18ee4253a2e61093e (patch) | |
| tree | 17b442df07fa622dc2a600e278d6844262276ab3 /test-suite/bugs/closed/4280.v | |
| parent | 0621891c4ba7606d91e614408378af17d3b0aee3 (diff) | |
Adding a test for bug #4280.
Diffstat (limited to 'test-suite/bugs/closed/4280.v')
| -rw-r--r-- | test-suite/bugs/closed/4280.v | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/test-suite/bugs/closed/4280.v b/test-suite/bugs/closed/4280.v new file mode 100644 index 000000000..fd7897509 --- /dev/null +++ b/test-suite/bugs/closed/4280.v @@ -0,0 +1,24 @@ +Require Import ZArith. +Require Import Eqdep_dec. +Local Open Scope Z_scope. + +Definition t := { n: Z | n > 1 }. + +Program Definition two : t := 2. +Next Obligation. omega. Qed. + +Program Definition t_eq (x y: t) : {x=y} + {x<>y} := + if Z.eq_dec (proj1_sig x) (proj1_sig y) then left _ else right _. +Next Obligation. + destruct x as [x Px], y as [y Py]. simpl in H; subst y. + f_equal. apply UIP_dec. decide equality. +Qed. +Next Obligation. + congruence. +Qed. + +Definition t_list_eq: forall (x y: list t), {x=y} + {x<>y}. +Proof. decide equality. apply t_eq. Defined. + +Goal match t_list_eq (two::nil) (two::nil) with left _ => True | right _ => False end. +Proof. exact I. Qed. |