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_OUTPUT_SEQUENCE_HPP_INCLUDED 9 #define BOOST_IOSTREAMS_OUTPUT_SEQUENCE_HPP_INCLUDED 10 11 #if defined(_MSC_VER) 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 output_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 > output_sequence(T & t)40output_sequence(T& t) 41 { return detail::output_sequence_impl<T>::output_sequence(t); } 42 43 namespace detail { 44 45 //------------------Definition of output_sequence_impl------------------------// 46 47 template<typename T> 48 struct output_sequence_impl 49 : mpl::if_< 50 detail::is_custom<T>, 51 operations<T>, 52 output_sequence_impl<direct_tag> 53 >::type 54 { }; 55 56 template<> 57 struct output_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 > output_sequenceboost::iostreams::detail::output_sequence_impl63 output_sequence(U& u) { return u.output_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_OUTPUT_SEQUENCE_HPP_INCLUDED 73