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authorGravatar Adam Chlipala <adamc@hcoop.net>2008-11-08 14:42:52 -0500
committerGravatar Adam Chlipala <adamc@hcoop.net>2008-11-08 14:42:52 -0500
commit437a207ec01c2ab18bb424cc2d6d36b59f3c8efb (patch)
treea7076475ba537b7e8b99d2133d5f0b6340e55e61 /src/order.sig
parent901b6d55e625be136ddd677a3d8a36e5068de2ae (diff)
Broaden set of possible especializations
Diffstat (limited to 'src/order.sig')
-rw-r--r--src/order.sig3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/order.sig b/src/order.sig
index c648f78b..fcee69ea 100644
--- a/src/order.sig
+++ b/src/order.sig
@@ -31,5 +31,6 @@ signature ORDER = sig
val join : order * (unit -> order) -> order
val joinL : ('a * 'b -> order) -> 'a list * 'b list -> order
-
+ val joinO : ('a * 'b -> order) -> 'a option * 'b option -> order
+
end