New macro CGAL_USE(x) to help killing "unused variable" warnings.

Testsuite/include/CGAL/Testsuite/use.h

@@ -0,0 +1,34 @@
+// Copyright (c) 2007   INRIA Sophia-Antipolis (France).
+// All rights reserved.
+//
+// This file is part of CGAL (www.cgal.org); you can redistribute it and/or
+// modify it under the terms of the GNU Lesser General Public License as
+// published by the Free Software Foundation; version 2.1 of the License.
+// See the file LICENSE.LGPL distributed with CGAL.
+//
+// Licensees holding a valid commercial license may use this file in
+// accordance with the commercial license agreement provided with the software.
+//
+// This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
+// WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+//
+// $URL$
+// $Id$
+//
+// Author(s)     : Sylvain Pion
+
+#ifndef CGAL_TESTSUITE_USE_H
+#define CGAL_TESTSUITE_USE_H
+
+namespace CGAL { namespace CGALi {
+
+template < typename T > inline
+void use(const T&) {}
+
+} }
+
+// CGAL_USE() is a macro which aims at removing "variable is unused" warnings.
+
+#define CGAL_USE(x) ::CGAL::CGALi::use(x)
+
+#endif // CGAL_TESTSUITE_USE_H