From e52bfd221b6a28fd74a70daa92ff71c74c55ec22 Mon Sep 17 00:00:00 2001
From: filliatr
Date: Fri, 26 Nov 1999 09:28:05 +0000
Subject: module Termast

git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@149 85f007b7-540e-0410-9357-904b9bb8a0f7
---
 lib/util.ml | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'lib/util.ml')

diff --git a/lib/util.ml b/lib/util.ml
index ed56f06d76..77d26ecf4d 100644
--- a/lib/util.ml
+++ b/lib/util.ml
@@ -62,6 +62,13 @@ let stringmap_dom m = Stringmap.fold (fun s _ l -> s::l) m []
 let list_intersect l1 l2 = 
   List.filter (fun x -> List.mem x l2) l1
 
+let list_union l1 l2 = 
+  let rec urec = function
+    | [] -> l2
+    | a::l -> if List.mem a l2 then urec l else a::urec l
+  in 
+  urec l1
+
 let list_unionq l1 l2 = 
   let rec urec = function
     | [] -> l2
-- 
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