X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Flambda-delta%2Fcommon%2Fmarks.ml;fp=helm%2Fsoftware%2Flambda-delta%2Fcommon%2Fmarks.ml;h=026414e2a2e2c1bc80cb5840bc648f87bef2d627;hb=2b1375e4b44e2ef351a6341a5bb0a4823e8daae5;hp=0000000000000000000000000000000000000000;hpb=a3b9fc77770f42070632bcb575546678025e09b2;p=helm.git

diff --git a/helm/software/lambda-delta/common/marks.ml b/helm/software/lambda-delta/common/marks.ml
new file mode 100644
index 000000000..026414e2a
--- /dev/null
+++ b/helm/software/lambda-delta/common/marks.ml
@@ -0,0 +1,21 @@
+(*
+    ||M||  This file is part of HELM, an Hypertextual, Electronic        
+    ||A||  Library of Mathematics, developed at the Computer Science     
+    ||T||  Department, University of Bologna, Italy.                     
+    ||I||                                                                
+    ||T||  HELM is free software; you can redistribute it and/or         
+    ||A||  modify it under the terms of the GNU General Public License   
+    \   /  version 2 or (at your option) any later version.              
+     \ /   This software is distributed as is, NO WARRANTY.              
+      V_______________________________________________________________ *)
+
+module Y = Entity
+
+(* interface functions ******************************************************)
+
+let new_location =
+   let location = ref 0 in
+   fun () -> incr location; !location
+
+let new_mark () =
+   Y.Mark (new_location ())