mirror of https://github.com/CGAL/cgal
49 lines
1.7 KiB
C++
49 lines
1.7 KiB
C++
// Copyright (c) 2007 INRIA Sophia-Antipolis (France). 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: svn+ssh://scm.gforge.inria.fr/svn/cgal/trunk/Kernel_23/include/CGAL/basic.h $
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// $Id: basic.h 28567 2006-02-16 14:30:13Z lsaboret $
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//
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// Author(s) : Sylvain Pion
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#ifndef CGAL_DEFAULT_ARGUMENT_H
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#define CGAL_DEFAULT_ARGUMENT_H
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// Default_argument is a tag that can be used to shrink mangled names and
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// error messages in place of the default value of template arguments.
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// It could also be used by users to specify default values to arguments which
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// are not at the end of the argument list.
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// It can also be useful to easily break cyclic dependencies in templates.
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// Maybe we should provide a macro to disable it so as to show the arguments?
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// Maybe we could document it?
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// If_default_argument is a helper class which helps using this scheme.
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namespace CGAL {
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struct Default_argument;
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template < typename Argument, typename Default >
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struct If_default_argument {
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typedef Argument type;
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};
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template < typename Default >
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struct If_default_argument <Default_argument, Default> {
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typedef Default type;
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};
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}
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#endif // CGAL_DEFAULT_ARGUMENT_H
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