X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=nodestack.h;h=0e952417b16c87a484712a94de4953bebc984d96;hb=2ebb0b5a772c0bc5366c41c4980f3fd06f8081ae;hp=5351d6c7e7b4eb693f6af5bbecc8c4c41f1094ff;hpb=4e8626fa3721aededd84133382625e20ae6490cf;p=model-checker.git

diff --git a/nodestack.h b/nodestack.h
index 5351d6c..0e95241 100644
--- a/nodestack.h
+++ b/nodestack.h
@@ -13,7 +13,7 @@
 
 class ModelAction;
 
-typedef std::list< ModelAction *, MyAlloc< ModelAction * > > action_set_t;
+typedef std::list< const ModelAction *, MyAlloc< const ModelAction * > > readfrom_set_t;
 
 /**
  * @brief A single node in a NodeStack
@@ -43,7 +43,7 @@ public:
 	 * occurred previously in the stack. */
 	Node * get_parent() const { return parent; }
 
-	void add_read_from(ModelAction *act);
+	void add_read_from(const ModelAction *act);
 
 	void print();
 
@@ -60,7 +60,7 @@ private:
 
 	/** The set of ModelActions that this the action at this Node may read
 	 *  from. Only meaningful if this Node represents a 'read' action. */
-	action_set_t may_read_from;
+	readfrom_set_t may_read_from;
 };
 
 typedef std::list< Node *, MyAlloc< Node * > > node_list_t;