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| -rw-r--r-- | src/Util/Curry.v | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/src/Util/Curry.v b/src/Util/Curry.v index 0e1c0d635..fe92baa30 100644 --- a/src/Util/Curry.v +++ b/src/Util/Curry.v @@ -1,2 +1,16 @@ Definition curry2 {A B C} (f : A -> B -> C) (x : A * B) : C := let '(a, b) := x in f a b. + +Ltac change_with_curried f := + cbv beta in f; (* work around https://coq.inria.fr/bugs/show_bug.cgi?id=5430 *) + lazymatch type of f with + | ?A -> ?B -> ?C + => let f' := fresh f in + rename f into f'; + pose (fun (ab : A * B) => f' (fst ab) (snd ab)) as f; + change f' with (fun (a : A) (b : B) => f (a, b)); + subst f'; + cbv beta; + change_with_curried f + | _ => idtac + end. |