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-rw-r--r--lib/ur/list.urs2
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/ur/list.urs b/lib/ur/list.urs
index 66007a39..55068935 100644
--- a/lib/ur/list.urs
+++ b/lib/ur/list.urs
@@ -54,6 +54,8 @@ val filterM : m ::: (Type -> Type) -> monad m -> a ::: Type
val foldlMap : a ::: Type -> b ::: Type -> c ::: Type
-> (a -> b -> c * b) -> b -> t a -> t c * b
+val mem : a ::: Type -> eq a -> a -> t a -> bool
+
val find : a ::: Type -> (a -> bool) -> t a -> option a
val search : a ::: Type -> b ::: Type -> (a -> option b) -> t a -> option b