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-rw-r--r--lib/util.ml7
1 files changed, 6 insertions, 1 deletions
diff --git a/lib/util.ml b/lib/util.ml
index b7364cbc53..2db11131da 100644
--- a/lib/util.ml
+++ b/lib/util.ml
@@ -69,6 +69,10 @@ module Array : CArray.ExtS = CArray
module Map = CMap
+(* Stacks *)
+
+module Stack = CStack
+
(* Matrices *)
let matrix_transpose mat =
@@ -118,7 +122,8 @@ let delayed_force f = f ()
(* Misc *)
-type ('a,'b) union = Inl of 'a | Inr of 'b
+type ('a, 'b) union = ('a, 'b) CSig.union = Inl of 'a | Inr of 'b
+type ('a, 'b) seek = ('a, 'b) CSig.seek = Stop of 'a | Next of 'b
(*s interruption *)