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[casparcg] / dependencies / boost / boost / iostreams / operations_fwd.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_OPERATIONS_FWD_HPP_INCLUDED
9 #define BOOST_IOSTREAMS_OPERATIONS_FWD_HPP_INCLUDED
10
11 #if defined(_MSC_VER) && (_MSC_VER >= 1020)
12 # pragma once
13 #endif
14
15 #include <boost/mpl/not.hpp>
16 #include <boost/type_traits/is_base_and_derived.hpp>
17
18 namespace boost { namespace iostreams {
19
20 template<typename T>
21 struct operations;
22
23 namespace detail {
24
25 struct custom_tag { };
26
27 template<typename T>
28 struct is_custom
29     : mpl::not_<
30           is_base_and_derived< custom_tag, operations<T> >
31       >
32     { };
33
34 } // End namespace detail.
35
36 template<typename T>
37 struct operations : detail::custom_tag { };
38
39 } } // End namespaces iostreams, boost.
40
41 #endif // #ifndef BOOST_IOSTREAMS_OPERATIONS_FWD_HPP_INCLUDED //--------------//