boost/iostreams/detail/broken_overload_resolution/forward.hpp

   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
   6 // See http://www.boost.org/libs/iostreams for documentation.
   7
   8 #ifndef BOOST_IOSTREAMS_DETAIL_BROKEN_OVERLOAD_RESOLUTION_HPP_INCLUDED
   9 #define BOOST_IOSTREAMS_DETAIL_BROKEN_OVERLOAD_RESOLUTION_HPP_INCLUDED
  10
  11 #include <boost/config.hpp>                     // BOOST_STATIC_CONSANT.
  12 #include <boost/mpl/bool.hpp>
  13 #include <boost/type_traits/is_same.hpp>
  14
  15 namespace boost { namespace iostreams { namespace detail {
  16
  17 template<typename Device, typename U>
  18 struct forward_impl {
  19     BOOST_STATIC_CONSTANT(bool, value =
  20         ( !is_same< U, Device >::value &&
  21           !is_same< U, reference_wrapper<Device> >::value ));
  22 };
  23
  24 template<typename Device, typename U>
  25 struct forward
  26     : mpl::bool_<forward_impl<Device, U>::value>
  27     { };
  28
  29 } } } // End namespaces detail, iostreams, boost.
  30
  31 #endif // #ifndef BOOST_IOSTREAMS_DETAIL_BROKEN_OVERLOAD_RESOLUTION_HPP_INCLUDED