diff -r cd72eae05bdf -r 3c00344f49c9 lemon/concepts/path.h
--- a/lemon/concepts/path.h	Mon Jul 16 16:21:40 2018 +0200
+++ b/lemon/concepts/path.h	Wed Oct 17 19:14:07 2018 +0200
@@ -2,7 +2,7 @@
  *
  * This file is a part of LEMON, a generic C++ optimization library.
  *
- * Copyright (C) 2003-2009
+ * Copyright (C) 2003-2013
  * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
  * (Egervary Research Group on Combinatorial Optimization, EGRES).
  *
@@ -75,7 +75,7 @@
       /// \brief Template assigment operator
       template <typename CPath>
       Path& operator=(const CPath& cpath) {
-        ignore_unused_variable_warning(cpath);
+        ::lemon::ignore_unused_variable_warning(cpath);
         return *this;
       }
 
@@ -135,12 +135,12 @@
           e = (i != ii);
           e = (i < ii);
 
-          ignore_unused_variable_warning(l);
-          ignore_unused_variable_warning(pp);
-          ignore_unused_variable_warning(e);
-          ignore_unused_variable_warning(id);
-          ignore_unused_variable_warning(ii);
-          ignore_unused_variable_warning(ed);
+          ::lemon::ignore_unused_variable_warning(l);
+          ::lemon::ignore_unused_variable_warning(pp);
+          ::lemon::ignore_unused_variable_warning(e);
+          ::lemon::ignore_unused_variable_warning(id);
+          ::lemon::ignore_unused_variable_warning(ii);
+          ::lemon::ignore_unused_variable_warning(ed);
         }
       };
 
@@ -162,10 +162,10 @@
           e = (i == INVALID);
           e = (i != INVALID);
 
-          ignore_unused_variable_warning(l);
-          ignore_unused_variable_warning(e);
-          ignore_unused_variable_warning(id);
-          ignore_unused_variable_warning(ed);
+          ::lemon::ignore_unused_variable_warning(l);
+          ::lemon::ignore_unused_variable_warning(e);
+          ::lemon::ignore_unused_variable_warning(id);
+          ::lemon::ignore_unused_variable_warning(ed);
         }
         _Path& p;
         PathDumperConstraints() {}
@@ -188,10 +188,10 @@
           e = (i == INVALID);
           e = (i != INVALID);
 
-          ignore_unused_variable_warning(l);
-          ignore_unused_variable_warning(e);
-          ignore_unused_variable_warning(id);
-          ignore_unused_variable_warning(ed);
+          ::lemon::ignore_unused_variable_warning(l);
+          ::lemon::ignore_unused_variable_warning(e);
+          ::lemon::ignore_unused_variable_warning(id);
+          ::lemon::ignore_unused_variable_warning(ed);
         }
         _Path& p;
         PathDumperConstraints() {}