nodestack: don't use C++ references

[model-checker.git] / nodestack.h

diff --git a/nodestack.h b/nodestack.h
index 47c72678aa13cffb9294e6a7d842860136e37baf..cd34ba42189977d25ed52e0a57b60c3ca25839ed 100644 (file)
--- a/nodestack.h
+++ b/nodestack.h
@@ -71,7 +71,7 @@ public:
         * occurred previously in the stack. */
        Node * get_parent() const { return parent; }
 
-       bool add_future_value(struct future_value& fv);
+       bool add_future_value(struct future_value fv);
        struct future_value get_future_value() const;
        bool increment_future_value();
        bool future_value_empty() const;