// (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_FLUSH_HPP_INCLUDED #define BOOST_IOSTREAMS_FLUSH_HPP_INCLUDED #if defined(_MSC_VER) # pragma once #endif #include <boost/config.hpp> // DEDUCED_TYPENAME, MSVC. #include <boost/detail/workaround.hpp> #include <boost/iostreams/detail/dispatch.hpp> #include <boost/iostreams/detail/streambuf.hpp> #include <boost/iostreams/detail/wrap_unwrap.hpp> #include <boost/iostreams/operations_fwd.hpp> #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 flush_device_impl; template<typename T> struct flush_filter_impl; } // End namespace detail. template<typename T> bool flush(T& t) { return detail::flush_device_impl<T>::flush(detail::unwrap(t)); } template<typename T, typename Sink> bool flush(T& t, Sink& snk) { return detail::flush_filter_impl<T>::flush(detail::unwrap(t), snk); } namespace detail { //------------------Definition of flush_device_impl---------------------------// template<typename T> struct flush_device_impl : mpl::if_< is_custom<T>, operations<T>, flush_device_impl< BOOST_DEDUCED_TYPENAME dispatch< T, ostream_tag, streambuf_tag, flushable_tag, any_tag >::type > >::type { }; template<> struct flush_device_impl<ostream_tag> { template<typename T> static bool flush(T& t) { return t.rdbuf()->BOOST_IOSTREAMS_PUBSYNC() == 0; } }; template<> struct flush_device_impl<streambuf_tag> { template<typename T> static bool flush(T& t) { return t.BOOST_IOSTREAMS_PUBSYNC() == 0; } }; template<> struct flush_device_impl<flushable_tag> { template<typename T> static bool flush(T& t) { return t.flush(); } }; template<> struct flush_device_impl<any_tag> { template<typename T> static bool flush(T&) { return true; } }; //------------------Definition of flush_filter_impl---------------------------// template<typename T> struct flush_filter_impl : mpl::if_< is_custom<T>, operations<T>, flush_filter_impl< BOOST_DEDUCED_TYPENAME dispatch< T, flushable_tag, any_tag >::type > >::type { }; template<> struct flush_filter_impl<flushable_tag> { template<typename T, typename Sink> static bool flush(T& t, Sink& snk) { return t.flush(snk); } }; template<> struct flush_filter_impl<any_tag> { template<typename T, typename Sink> static bool flush(T&, Sink&) { return false; } }; } // End namespace detail. } } // End namespaces iostreams, boost. #include <boost/iostreams/detail/config/enable_warnings.hpp> #endif // #ifndef BOOST_IOSTREAMS_FLUSH_HPP_INCLUDED