diff options
| -rw-r--r-- | tactics/equality.ml | 2 | ||||
| -rw-r--r-- | test-suite/modules/injection_discriminate_inversion.v | 34 |
2 files changed, 35 insertions, 1 deletions
diff --git a/tactics/equality.ml b/tactics/equality.ml index b1f0360c43..b7a428e2aa 100644 --- a/tactics/equality.ml +++ b/tactics/equality.ml @@ -282,7 +282,7 @@ let find_positions env sigma t1 t2 = let sorts = list_intersect sorts (allowed_sorts env (fst sp1)) in (* both sides are fully applied constructors, so either we descend, or we can discriminate here. *) - if sp1 = sp2 then + if is_conv env sigma hd1 hd2 then let nrealargs = constructor_nrealargs env sp1 in let rargs1 = list_lastn nrealargs args1 in let rargs2 = list_lastn nrealargs args2 in diff --git a/test-suite/modules/injection_discriminate_inversion.v b/test-suite/modules/injection_discriminate_inversion.v new file mode 100644 index 0000000000..88c19cb1a6 --- /dev/null +++ b/test-suite/modules/injection_discriminate_inversion.v @@ -0,0 +1,34 @@ +Module M. + Inductive I : Set := C : nat -> I. +End M. + +Module M1 := M. + + +Goal forall x, M.C x = M1.C 0 -> x = 0 . + intros x H. + (* + injection sur deux constructeurs egaux mais appeles + par des modules differents + *) + injection H. + tauto. +Qed. + +Goal M.C 0 <> M1.C 1. + (* + Discriminate sur deux constructeurs egaux mais appeles + par des modules differents + *) + intro H;discriminate H. +Qed. + + +Goal forall x, M.C x = M1.C 0 -> x = 0. + intros x H. + (* + inversion sur deux constructeurs egaux mais appeles + par des modules differents + *) + inversion H. reflexivity. +Qed.
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