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-rw-r--r--lib/ur/listPair.urs3
1 files changed, 3 insertions, 0 deletions
diff --git a/lib/ur/listPair.urs b/lib/ur/listPair.urs
index b473e226..9efff405 100644
--- a/lib/ur/listPair.urs
+++ b/lib/ur/listPair.urs
@@ -8,3 +8,6 @@ val all : a ::: Type -> b ::: Type -> (a -> b -> bool) -> list a -> list b -> bo
val mp : a ::: Type -> b ::: Type -> c ::: Type
-> (a -> b -> c) -> list a -> list b -> list c
+
+val mapM : m ::: (Type -> Type) -> monad m -> a ::: Type -> b ::: Type -> c ::: Type
+ -> (a -> b -> m c) -> list a -> list b -> m (list c)