1 files changed, 59 insertions, 0 deletions
diff --git a/lib/asio/is_write_buffered.hpp b/lib/asio/is_write_buffered.hpp
new file mode 100644
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+++ b/lib/asio/is_write_buffered.hpp
@@ -0,0 +1,59 @@
+//
+// is_write_buffered.hpp
+// ~~~~~~~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2003-2018 Christopher M. Kohlhoff (chris at kohlhoff dot com)
+//
+// 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)
+//
+
+#ifndef ASIO_IS_WRITE_BUFFERED_HPP
+#define ASIO_IS_WRITE_BUFFERED_HPP
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1200)
+# pragma once
+#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
+
+#include "asio/detail/config.hpp"
+#include "asio/buffered_stream_fwd.hpp"
+#include "asio/buffered_write_stream_fwd.hpp"
+
+#include "asio/detail/push_options.hpp"
+
+namespace asio {
+
+namespace detail {
+
+template <typename Stream>
+char is_write_buffered_helper(buffered_stream<Stream>* s);
+
+template <typename Stream>
+char is_write_buffered_helper(buffered_write_stream<Stream>* s);
+
+struct is_write_buffered_big_type { char data[10]; };
+is_write_buffered_big_type is_write_buffered_helper(...);
+
+} // namespace detail
+
+/// The is_write_buffered class is a traits class that may be used to determine
+/// whether a stream type supports buffering of written data.
+template <typename Stream>
+class is_write_buffered
+{
+public:
+#if defined(GENERATING_DOCUMENTATION)
+  /// The value member is true only if the Stream type supports buffering of
+  /// written data.
+  static const bool value;
+#else
+  ASIO_STATIC_CONSTANT(bool,
+      value = sizeof(detail::is_write_buffered_helper((Stream*)0)) == 1);
+#endif
+};
+
+} // namespace asio
+
+#include "asio/detail/pop_options.hpp"
+
+#endif // ASIO_IS_WRITE_BUFFERED_HPP