diff -r 2c2e8df67ddc -r b9887ae63df0 test/edge_set_test.cc
--- a/test/edge_set_test.cc	Tue Aug 06 12:21:06 2013 +0200
+++ b/test/edge_set_test.cc	Wed Aug 07 07:09:31 2013 +0200
@@ -44,12 +44,12 @@
     n2 = digraph.addNode();
 
   Digraph::Arc ga1 = digraph.addArc(n1, n2);
-  ignore_unused_variable_warning(ga1);
+  ::lemon::ignore_unused_variable_warning(ga1);
 
   ArcSet arc_set(digraph);
 
   Digraph::Arc ga2 = digraph.addArc(n2, n1);
-  ignore_unused_variable_warning(ga2);
+  ::lemon::ignore_unused_variable_warning(ga2);
 
   checkGraphNodeList(arc_set, 2);
   checkGraphArcList(arc_set, 0);
@@ -77,7 +77,7 @@
   ArcSet::Arc a2 = arc_set.addArc(n2, n1),
     a3 = arc_set.addArc(n2, n3),
     a4 = arc_set.addArc(n2, n3);
-  ignore_unused_variable_warning(a2,a3,a4);
+  ::lemon::ignore_unused_variable_warning(a2,a3,a4);
 
   checkGraphNodeList(arc_set, 3);
   checkGraphArcList(arc_set, 4);
@@ -114,12 +114,12 @@
     n2 = digraph.addNode();
 
   Digraph::Arc ga1 = digraph.addArc(n1, n2);
-  ignore_unused_variable_warning(ga1);
+  ::lemon::ignore_unused_variable_warning(ga1);
 
   ArcSet arc_set(digraph);
 
   Digraph::Arc ga2 = digraph.addArc(n2, n1);
-  ignore_unused_variable_warning(ga2);
+  ::lemon::ignore_unused_variable_warning(ga2);
 
   checkGraphNodeList(arc_set, 2);
   checkGraphArcList(arc_set, 0);
@@ -147,7 +147,7 @@
   ArcSet::Arc a2 = arc_set.addArc(n2, n1),
     a3 = arc_set.addArc(n2, n3),
     a4 = arc_set.addArc(n2, n3);
-  ignore_unused_variable_warning(a2,a3,a4);
+  ::lemon::ignore_unused_variable_warning(a2,a3,a4);
 
   checkGraphNodeList(arc_set, 3);
   checkGraphArcList(arc_set, 4);
@@ -198,12 +198,12 @@
     n2 = digraph.addNode();
 
   Digraph::Arc ga1 = digraph.addArc(n1, n2);
-  ignore_unused_variable_warning(ga1);
+  ::lemon::ignore_unused_variable_warning(ga1);
 
   EdgeSet edge_set(digraph);
 
   Digraph::Arc ga2 = digraph.addArc(n2, n1);
-  ignore_unused_variable_warning(ga2);
+  ::lemon::ignore_unused_variable_warning(ga2);
 
   checkGraphNodeList(edge_set, 2);
   checkGraphArcList(edge_set, 0);
@@ -240,7 +240,7 @@
   EdgeSet::Edge e2 = edge_set.addEdge(n2, n1),
     e3 = edge_set.addEdge(n2, n3),
     e4 = edge_set.addEdge(n2, n3);
-  ignore_unused_variable_warning(e2,e3,e4);
+  ::lemon::ignore_unused_variable_warning(e2,e3,e4);
 
   checkGraphNodeList(edge_set, 3);
   checkGraphEdgeList(edge_set, 4);
@@ -286,12 +286,12 @@
     n2 = digraph.addNode();
 
   Digraph::Arc ga1 = digraph.addArc(n1, n2);
-  ignore_unused_variable_warning(ga1);
+  ::lemon::ignore_unused_variable_warning(ga1);
 
   EdgeSet edge_set(digraph);
 
   Digraph::Arc ga2 = digraph.addArc(n2, n1);
-  ignore_unused_variable_warning(ga2);
+  ::lemon::ignore_unused_variable_warning(ga2);
 
   checkGraphNodeList(edge_set, 2);
   checkGraphArcList(edge_set, 0);
@@ -328,7 +328,7 @@
   EdgeSet::Edge e2 = edge_set.addEdge(n2, n1),
     e3 = edge_set.addEdge(n2, n3),
     e4 = edge_set.addEdge(n2, n3);
-  ignore_unused_variable_warning(e2,e3,e4);
+  ::lemon::ignore_unused_variable_warning(e2,e3,e4);
 
   checkGraphNodeList(edge_set, 3);
   checkGraphEdgeList(edge_set, 4);