is_read_buffered.hpp
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//
// is_read_buffered.hpp
// ~~~~~~~~~~~~~~~~~~~~
//
// Copyright (c) 2003-2020 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_READ_BUFFERED_HPP
#define ASIO_IS_READ_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_read_stream_fwd.hpp"
#include "asio/buffered_stream_fwd.hpp"
#include "asio/detail/push_options.hpp"
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
ASIO_STATIC_CONSTANT(bool,
value = sizeof(detail::is_read_buffered_helper((Stream*)0)) == 1);
#endif
};
} // namespace asio
#include "asio/detail/pop_options.hpp"
#endif // ASIO_IS_READ_BUFFERED_HPP