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Diffstat (limited to 'src/Util/Sum.v')
| -rw-r--r-- | src/Util/Sum.v | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/src/Util/Sum.v b/src/Util/Sum.v index 2f03639b2..915f58df9 100644 --- a/src/Util/Sum.v +++ b/src/Util/Sum.v @@ -16,3 +16,12 @@ Proof. Qed. Arguments sumwise {A B} _ _ _ _. + +Ltac congruence_sum_step := + match goal with + | [ H : inl _ = inr _ |- _ ] => solve [ inversion H ] + | [ H : inr _ = inl _ |- _ ] => solve [ inversion H ] + | [ H : inl _ = inl _ |- _ ] => inversion H; clear H + | [ H : inr _ = inr _ |- _ ] => inversion H; clear H + end. +Ltac congruence_sum := repeat congruence_sum_step. |