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125 lines
3.1 KiB
125 lines
3.1 KiB
// (C) Copyright 2008 CodeRage, LLC (turkanis at coderage dot com) |
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// (C) Copyright 2003-2007 Jonathan Turkanis |
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// Distributed under the Boost Software License, Version 1.0. (See accompanying |
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt.) |
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// See http://www.boost.org/libs/iostreams for documentation. |
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#ifndef BOOST_IOSTREAMS_FLUSH_HPP_INCLUDED |
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#define BOOST_IOSTREAMS_FLUSH_HPP_INCLUDED |
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#if defined(_MSC_VER) |
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# pragma once |
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#endif |
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#include <boost/config.hpp> // DEDUCED_TYPENAME, MSVC. |
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#include <boost/detail/workaround.hpp> |
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#include <boost/iostreams/detail/dispatch.hpp> |
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#include <boost/iostreams/detail/streambuf.hpp> |
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#include <boost/iostreams/detail/wrap_unwrap.hpp> |
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#include <boost/iostreams/operations_fwd.hpp> |
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#include <boost/iostreams/traits.hpp> |
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#include <boost/mpl/if.hpp> |
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// Must come last. |
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#include <boost/iostreams/detail/config/disable_warnings.hpp> |
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namespace boost { namespace iostreams { |
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namespace detail { |
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template<typename T> |
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struct flush_device_impl; |
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template<typename T> |
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struct flush_filter_impl; |
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} // End namespace detail. |
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template<typename T> |
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bool flush(T& t) |
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{ return detail::flush_device_impl<T>::flush(detail::unwrap(t)); } |
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template<typename T, typename Sink> |
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bool flush(T& t, Sink& snk) |
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{ return detail::flush_filter_impl<T>::flush(detail::unwrap(t), snk); } |
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namespace detail { |
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//------------------Definition of flush_device_impl---------------------------// |
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template<typename T> |
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struct flush_device_impl |
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: mpl::if_< |
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is_custom<T>, |
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operations<T>, |
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flush_device_impl< |
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BOOST_DEDUCED_TYPENAME |
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dispatch< |
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T, ostream_tag, streambuf_tag, flushable_tag, any_tag |
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>::type |
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> |
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>::type |
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{ }; |
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template<> |
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struct flush_device_impl<ostream_tag> { |
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template<typename T> |
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static bool flush(T& t) |
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{ return t.rdbuf()->BOOST_IOSTREAMS_PUBSYNC() == 0; } |
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}; |
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template<> |
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struct flush_device_impl<streambuf_tag> { |
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template<typename T> |
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static bool flush(T& t) |
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{ return t.BOOST_IOSTREAMS_PUBSYNC() == 0; } |
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}; |
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template<> |
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struct flush_device_impl<flushable_tag> { |
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template<typename T> |
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static bool flush(T& t) { return t.flush(); } |
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}; |
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template<> |
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struct flush_device_impl<any_tag> { |
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template<typename T> |
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static bool flush(T&) { return true; } |
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}; |
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//------------------Definition of flush_filter_impl---------------------------// |
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template<typename T> |
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struct flush_filter_impl |
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: mpl::if_< |
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is_custom<T>, |
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operations<T>, |
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flush_filter_impl< |
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BOOST_DEDUCED_TYPENAME |
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dispatch< |
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T, flushable_tag, any_tag |
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>::type |
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> |
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>::type |
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{ }; |
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template<> |
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struct flush_filter_impl<flushable_tag> { |
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template<typename T, typename Sink> |
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static bool flush(T& t, Sink& snk) { return t.flush(snk); } |
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}; |
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template<> |
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struct flush_filter_impl<any_tag> { |
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template<typename T, typename Sink> |
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static bool flush(T&, Sink&) { return false; } |
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}; |
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} // End namespace detail. |
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} } // End namespaces iostreams, boost. |
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#include <boost/iostreams/detail/config/enable_warnings.hpp> |
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#endif // #ifndef BOOST_IOSTREAMS_FLUSH_HPP_INCLUDED
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