// | |
// is_read_buffered.hpp | |
// ~~~~~~~~~~~~~~~~~~~~ | |
// | |
// Copyright (c) 2003-2011 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 BOOST_ASIO_IS_READ_BUFFERED_HPP | |
#define BOOST_ASIO_IS_READ_BUFFERED_HPP | |
#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 | |
{ | |
public: | |
#if defined(GENERATING_DOCUMENTATION) | |
/// The value member is true only if the Stream type supports buffering of | |
/// read data. | |
static const bool value; | |
#else | |
BOOST_STATIC_CONSTANT(bool, | |
value = sizeof(detail::is_read_buffered_helper((Stream*)0)) == 1); | |
#endif | |
}; | |
} // namespace asio | |
} // namespace boost | |
#include <boost/asio/detail/pop_options.hpp> | |
#endif // BOOST_ASIO_IS_READ_BUFFERED_HPP |