diff options
Diffstat (limited to 'test-suite/success')
-rw-r--r-- | test-suite/success/rewrite.v | 17 | ||||
-rw-r--r-- | test-suite/success/vm_evars.v | 23 |
2 files changed, 39 insertions, 1 deletions
diff --git a/test-suite/success/rewrite.v b/test-suite/success/rewrite.v index 62249666b..448d0082d 100644 --- a/test-suite/success/rewrite.v +++ b/test-suite/success/rewrite.v @@ -151,10 +151,25 @@ Abort. (* Check that rewriting within evars still work (was broken in 8.5beta1) *) - Goal forall (a: unit) (H: a = tt), exists x y:nat, x = y. intros; eexists; eexists. rewrite H. Undo. subst. Abort. + +(* Check that iterated rewriting does not rewrite in the side conditions *) +(* Example from Sigurd Schneider, extracted from contrib containers *) + +Lemma EQ + : forall (e e' : nat), True -> e = e'. +Admitted. + +Lemma test (v1 v2 v3: nat) (v' : v1 = v2) : v2 = v1. +Proof. + rewrite <- (EQ v1 v2) in *. + exact v'. + (* There should be only two side conditions *) + exact I. + exact I. +Qed. diff --git a/test-suite/success/vm_evars.v b/test-suite/success/vm_evars.v new file mode 100644 index 000000000..2c8b099ef --- /dev/null +++ b/test-suite/success/vm_evars.v @@ -0,0 +1,23 @@ +Fixpoint iter {A} (n : nat) (f : A -> A) (x : A) := +match n with +| 0 => x +| S n => iter n f (f x) +end. + +Goal nat -> True. +Proof. +intros n. +evar (f : nat -> nat). +cut (iter 10 f 0 = 0). +vm_compute. +intros; constructor. +instantiate (f := (fun x => x)). +reflexivity. +Qed. + +Goal exists x, x = 5 + 5. +Proof. + eexists. + vm_compute. + reflexivity. +Qed. |