is_placeholder.hpp

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#ifndef BOOST_IS_PLACEHOLDER_HPP_INCLUDED
#define BOOST_IS_PLACEHOLDER_HPP_INCLUDED
 
// MS compatible compilers support #pragma once
 
#if defined( _MSC_VER ) && ( _MSC_VER >= 1020 )
# pragma once
#endif
 
 
//  is_placeholder.hpp - TR1 is_placeholder metafunction
//
//  Copyright (c) 2006 Peter Dimov
//
//  Distributed under the Boost Software License, Version 1.0.
//
//  See accompanying file LICENSE_1_0.txt or copy at
//  http://www.boost.org/LICENSE_1_0.txt
 
 
namespace boost
{
 
template< class T > struct is_placeholder
{
    enum _vt { value = 0 };
};
 
} // namespace boost
 
#endif // #ifndef BOOST_IS_PLACEHOLDER_HPP_INCLUDED