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// is_read_buffered.hpp
// ~~~~~~~~~~~~~~~~~~~~
// Copyright (c) 2003-2021 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


#if defined(_MSC_VER) && (_MSC_VER >= 1200)
# pragma once
#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)

#include <boost/asio/detail/config.hpp>
#include <boost/asio/buffered_read_stream_fwd.hpp>
#include <boost/asio/buffered_stream_fwd.hpp>

#include <boost/asio/detail/push_options.hpp>

namespace boost {
namespace asio {

namespace detail {

template <typename Stream>
char is_read_buffered_helper(buffered_stream<Stream>* s);

template <typename Stream>
char is_read_buffered_helper(buffered_read_stream<Stream>* s);

struct is_read_buffered_big_type { char data[10]; };
is_read_buffered_big_type is_read_buffered_helper(...);

} // namespace detail

/// The is_read_buffered class is a traits class that may be used to determine
/// whether a stream type supports buffering of read data.
template <typename Stream>
class is_read_buffered
  /// The value member is true only if the Stream type supports buffering of
  /// read data.
  static const bool value;
      value = sizeof(detail::is_read_buffered_helper((Stream*)0)) == 1);

} // namespace asio
} // namespace boost

#include <boost/asio/detail/pop_options.hpp>