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_VALUE_TYPE_HPP_INCLUDED
9 #define BOOST_IOSTREAMS_DETAIL_VALUE_TYPE_HPP_INCLUDED
10 
11 #if defined(_MSC_VER) && (_MSC_VER >= 1020)
12 # pragma once
13 #endif
14 
15 #include <boost/iostreams/traits.hpp>
16 #include <boost/mpl/if.hpp>
17 
18 namespace boost { namespace iostreams { namespace detail {
19 
20 template<typename T>
21 struct param_type {
22     typedef typename mpl::if_<is_std_io<T>, T&, const T&>::type type;
23 };
24 
25 template<typename T>
26 struct value_type {
27     typedef typename mpl::if_<is_std_io<T>, T&, T>::type type;
28 };
29 
30 } } } // End namespaces detail, iostreams, boost.
31 
32 #endif // #ifndef BOOST_IOSTREAMS_DETAIL_VALUE_TYPE_HPP_INCLUDED //-----------//
33