1 files changed, 125 insertions, 0 deletions
diff --git a/src/third_party/boost-1.69.0/boost/iostreams/flush.hpp b/src/third_party/boost-1.69.0/boost/iostreams/flush.hpp
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+++ b/src/third_party/boost-1.69.0/boost/iostreams/flush.hpp
@@ -0,0 +1,125 @@
+// (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