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-rw-r--r--demo/listFun.urs2
1 files changed, 2 insertions, 0 deletions
diff --git a/demo/listFun.urs b/demo/listFun.urs
index 8fd6eb0d..909bbcf6 100644
--- a/demo/listFun.urs
+++ b/demo/listFun.urs
@@ -1,5 +1,7 @@
functor Make(M : sig
type t
+ val toString : t -> string
+ val fromString : string -> option t
end) : sig
val main : unit -> transaction page
end