598bfd3f
 Hu Chunming
提交_GLIBCXX_USE_CX...
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// (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
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