1 #ifndef BOOST_IS_PLACEHOLDER_HPP_INCLUDED

     2 #define BOOST_IS_PLACEHOLDER_HPP_INCLUDED

     3 

     4 // MS compatible compilers support #pragma once

     5 

     6 #if defined( _MSC_VER ) && ( _MSC_VER >= 1020 )

     7 # pragma once

     8 #endif

     9 

    10 

    11 //  is_placeholder.hpp - TR1 is_placeholder metafunction

    12 //

    13 //  Copyright (c) 2006 Peter Dimov

    14 //

    15 //  Distributed under the Boost Software License, Version 1.0.

    16 //

    17 //  See accompanying file LICENSE_1_0.txt or copy at

    18 //  http://www.boost.org/LICENSE_1_0.txt

    19 

    20 

    21 namespace boost

    22 {

    23 

    24 template< class T > struct is_placeholder

    25 {

    26     enum _vt { value = 0 };

    27 };

    28 

    29 } // namespace boost

    30 

    31 #endif // #ifndef BOOST_IS_PLACEHOLDER_HPP_INCLUDED