include/boost/is_placeholder.hpp

0001 #ifndef BOOST_IS_PLACEHOLDER_HPP_INCLUDED
0002 #define BOOST_IS_PLACEHOLDER_HPP_INCLUDED
0003
0004 // MS compatible compilers support #pragma once
0005
0006 #if defined( _MSC_VER ) && ( _MSC_VER >= 1020 )
0007 # pragma once
0008 #endif
0009
0010
0011 //  is_placeholder.hpp - TR1 is_placeholder metafunction
0012 //
0013 //  Copyright (c) 2006 Peter Dimov
0014 //
0015 //  Distributed under the Boost Software License, Version 1.0.
0016 //
0017 //  See accompanying file LICENSE_1_0.txt or copy at
0018 //  http://www.boost.org/LICENSE_1_0.txt
0019
0020
0021 namespace boost
0022 {
0023
0024 template< class T > struct is_placeholder
0025 {
0026     enum _vt { value = 0 };
0027 };
0028
0029 } // namespace boost
0030
0031 #endif // #ifndef BOOST_IS_PLACEHOLDER_HPP_INCLUDED