call_traits.hpp 981 B

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  1. // (C) Copyright 2008 CodeRage, LLC (turkanis at coderage dot com)
  2. // (C) Copyright 2003-2007 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_VALUE_TYPE_HPP_INCLUDED
  7. #define BOOST_IOSTREAMS_DETAIL_VALUE_TYPE_HPP_INCLUDED
  8. #if defined(_MSC_VER)
  9. # pragma once
  10. #endif
  11. #include <boost/iostreams/traits.hpp>
  12. #include <boost/mpl/if.hpp>
  13. namespace boost { namespace iostreams { namespace detail {
  14. template<typename T>
  15. struct param_type {
  16. typedef typename mpl::if_<is_std_io<T>, T&, const T&>::type type;
  17. };
  18. template<typename T>
  19. struct value_type {
  20. typedef typename mpl::if_<is_std_io<T>, T&, T>::type type;
  21. };
  22. } } } // End namespaces detail, iostreams, boost.
  23. #endif // #ifndef BOOST_IOSTREAMS_DETAIL_VALUE_TYPE_HPP_INCLUDED //-----------//