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-rw-r--r--lib/ur/listPair.urs2
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/ur/listPair.urs b/lib/ur/listPair.urs
index 9efff405..91d8807d 100644
--- a/lib/ur/listPair.urs
+++ b/lib/ur/listPair.urs
@@ -11,3 +11,5 @@ val mp : a ::: Type -> b ::: Type -> c ::: Type
val mapM : m ::: (Type -> Type) -> monad m -> a ::: Type -> b ::: Type -> c ::: Type
-> (a -> b -> m c) -> list a -> list b -> m (list c)
+
+val unzip : a ::: Type -> b ::: Type -> list (a * b) -> list a * list b