boost/is_placeholder.hpp

   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