mirror of https://github.com/CGAL/cgal
48 lines
1.5 KiB
C++
48 lines
1.5 KiB
C++
// Copyright (c) 2004 Utrecht University (The Netherlands),
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// ETH Zurich (Switzerland), Freie Universitaet Berlin (Germany),
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// INRIA Sophia-Antipolis (France), Martin-Luther-University Halle-Wittenberg
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// (Germany), Max-Planck-Institute Saarbruecken (Germany), RISC Linz (Austria),
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// and Tel-Aviv University (Israel). All rights reserved.
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//
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// This file is part of CGAL (www.cgal.org); you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public License as
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// published by the Free Software Foundation; version 2.1 of the License.
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// See the file LICENSE.LGPL distributed with CGAL.
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//
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// Licensees holding a valid commercial license may use this file in
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// accordance with the commercial license agreement provided with the software.
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//
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// This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
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// WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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//
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// $URL$
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// $Id$
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//
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//
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// Author(s) : Sylvain Pion
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#ifndef CGAL_KERNEL_MPL_H
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#define CGAL_KERNEL_MPL_H
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#include <CGAL/basic.h>
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// Some tools for basic template metaprogramming.
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// These bits should move to CGAL/mpl.h in STL_Extension, or taken from Boost.
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CGAL_BEGIN_NAMESPACE
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// The additionnal int parameter is to obtain different types.
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template < typename A, typename B, int = 0 >
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struct First_if_different {
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typedef A Type;
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};
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template < typename A, int i >
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struct First_if_different<A, A, i> {
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struct Type{};
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};
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CGAL_END_NAMESPACE
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#endif
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