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
32