| 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_INPUT_SEQUENCE_HPP_INCLUDED |
| 9 | #define BOOST_IOSTREAMS_INPUT_SEQUENCE_HPP_INCLUDED |
| 10 | |
| 11 | #if defined(_MSC_VER) && (_MSC_VER >= 1020) |
| 12 | # pragma once |
| 13 | #endif |
| 14 | |
| 15 | #include <utility> // pair. |
| 16 | #include <boost/config.hpp> // DEDUCED_TYPENAME, MSVC. |
| 17 | #include <boost/detail/workaround.hpp> |
| 18 | #include <boost/iostreams/detail/wrap_unwrap.hpp> |
| 19 | #include <boost/iostreams/operations_fwd.hpp> // is_custom |
| 20 | #include <boost/iostreams/traits.hpp> |
| 21 | #include <boost/mpl/if.hpp> |
| 22 | |
| 23 | // Must come last. |
| 24 | #include <boost/iostreams/detail/config/disable_warnings.hpp> |
| 25 | |
| 26 | namespace boost { namespace iostreams { |
| 27 | |
| 28 | namespace detail { |
| 29 | |
| 30 | template<typename T> |
| 31 | struct input_sequence_impl; |
| 32 | |
| 33 | } // End namespace detail. |
| 34 | |
| 35 | template<typename T> |
| 36 | inline std::pair< |
| 37 | BOOST_DEDUCED_TYPENAME char_type_of<T>::type*, |
| 38 | BOOST_DEDUCED_TYPENAME char_type_of<T>::type* |
| 39 | > |
| 40 | input_sequence(T& t) |
| 41 | { return detail::input_sequence_impl<T>::input_sequence(t); } |
| 42 | |
| 43 | namespace detail { |
| 44 | |
| 45 | //------------------Definition of direct_impl-------------------------------// |
| 46 | |
| 47 | template<typename T> |
| 48 | struct input_sequence_impl |
| 49 | : mpl::if_< |
| 50 | detail::is_custom<T>, |
| 51 | operations<T>, |
| 52 | input_sequence_impl<direct_tag> |
| 53 | >::type |
| 54 | { }; |
| 55 | |
| 56 | template<> |
| 57 | struct input_sequence_impl<direct_tag> { |
| 58 | template<typename U> |
| 59 | static std::pair< |
| 60 | BOOST_DEDUCED_TYPENAME char_type_of<U>::type*, |
| 61 | BOOST_DEDUCED_TYPENAME char_type_of<U>::type* |
| 62 | > |
| 63 | input_sequence(U& u) { return u.input_sequence(); } |
| 64 | }; |
| 65 | |
| 66 | } // End namespace detail. |
| 67 | |
| 68 | } } // End namespaces iostreams, boost. |
| 69 | |
| 70 | #include <boost/iostreams/detail/config/enable_warnings.hpp> |
| 71 | |
| 72 | #endif // #ifndef BOOST_IOSTREAMS_INPUT_SEQUENCE_HPP_INCLUDED |
| 73 |