default_arg.hpp 860 B

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  1. // (C) Copyright 2008 CodeRage, LLC (turkanis at coderage dot com)
  2. // (C) Copyright 2005-2007 Jonathan Turkanis
  3. // Distributed under the Boost Software License, Version 1.0. (See accompanying
  4. // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt.)
  5. // See http://www.boost.org/libs/iostreams for documentation.
  6. #ifndef BOOST_IOSTREAMS_DETAIL_DEFAULT_ARG_HPP_INCLUDED
  7. #define BOOST_IOSTREAMS_DETAIL_DEFAULT_ARG_HPP_INCLUDED
  8. #if defined(_MSC_VER) && (_MSC_VER >= 1020)
  9. # pragma once
  10. #endif
  11. #include <boost/config.hpp>
  12. #include <boost/detail/workaround.hpp>
  13. #if BOOST_WORKAROUND(BOOST_MSVC, < 1300)
  14. # include <boost/mpl/identity.hpp>
  15. # define BOOST_IOSTREAMS_DEFAULT_ARG(arg) mpl::identity< arg >::type
  16. #else
  17. # define BOOST_IOSTREAMS_DEFAULT_ARG(arg) arg
  18. #endif
  19. #endif // #ifndef BOOST_IOSTREAMS_DETAIL_DEFAULT_ARG_HPP_INCLUDED