boost/iostreams/output_sequence.hpp
// (C) Copyright 2008 CodeRage, LLC (turkanis at coderage dot com) // (C) Copyright 2003-2007 Jonathan Turkanis // Distributed under the Boost Software License, Version 1.0. (See accompanying // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt.) // See http://www.boost.org/libs/iostreams for documentation. #ifndef BOOST_IOSTREAMS_OUTPUT_SEQUENCE_HPP_INCLUDED #define BOOST_IOSTREAMS_OUTPUT_SEQUENCE_HPP_INCLUDED #if defined(_MSC_VER) && (_MSC_VER >= 1020) # pragma once #endif #include <utility> // pair. #include <boost/config.hpp> // DEDUCED_TYPENAME, MSVC. #include <boost/detail/workaround.hpp> #include <boost/iostreams/detail/wrap_unwrap.hpp> #include <boost/iostreams/operations_fwd.hpp> // is_custom #include <boost/iostreams/traits.hpp> #include <boost/mpl/if.hpp> // Must come last. #include <boost/iostreams/detail/config/disable_warnings.hpp> namespace boost { namespace iostreams { namespace detail { template<typename T> struct output_sequence_impl; } // End namespace detail. template<typename T> inline std::pair< BOOST_DEDUCED_TYPENAME char_type_of<T>::type*, BOOST_DEDUCED_TYPENAME char_type_of<T>::type* > output_sequence(T& t) { return detail::output_sequence_impl<T>::output_sequence(t); } namespace detail { //------------------Definition of output_sequence_impl------------------------// template<typename T> struct output_sequence_impl : mpl::if_< detail::is_custom<T>, operations<T>, output_sequence_impl<direct_tag> >::type { }; template<> struct output_sequence_impl<direct_tag> { template<typename U> static std::pair< BOOST_DEDUCED_TYPENAME char_type_of<U>::type*, BOOST_DEDUCED_TYPENAME char_type_of<U>::type* > output_sequence(U& u) { return u.output_sequence(); } }; } // End namespace detail. } } // End namespaces iostreams, boost. #include <boost/iostreams/detail/config/enable_warnings.hpp> #endif // #ifndef BOOST_IOSTREAMS_OUTPUT_SEQUENCE_HPP_INCLUDED