// // is_write_buffered.hpp // ~~~~~~~~~~~~~~~~~~~~~ // // Copyright (c) 2003-2014 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_WRITE_BUFFERED_HPP #define BOOST_ASIO_IS_WRITE_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_stream_fwd.hpp> #include <boost/asio/buffered_write_stream_fwd.hpp> #include <boost/asio/detail/push_options.hpp> namespace boost { 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 BOOST_ASIO_STATIC_CONSTANT(bool, value = sizeof(detail::is_write_buffered_helper((Stream*)0)) == 1); #endif }; } // namespace asio } // namespace boost #include <boost/asio/detail/pop_options.hpp> #endif // BOOST_ASIO_IS_WRITE_BUFFERED_HPP