2 * Copyright Andrey Semashev 2016.
3 * Distributed under the Boost Software License, Version 1.0.
4 * (See accompanying file LICENSE_1_0.txt or copy at
5 * http://www.boost.org/LICENSE_1_0.txt)
8 * \file sfinae_tools.hpp
9 * \author Andrey Semashev
12 * \brief This header is the Boost.Log library implementation, see the library documentation
13 * at http://www.boost.org/doc/libs/release/libs/log/doc/html/index.html.
16 #ifndef BOOST_LOG_DETAIL_SFINAE_TOOLS_HPP_INCLUDED_
17 #define BOOST_LOG_DETAIL_SFINAE_TOOLS_HPP_INCLUDED_
19 #include <boost/log/detail/config.hpp>
20 #include <boost/core/enable_if.hpp>
21 #include <boost/log/detail/header.hpp>
23 #ifdef BOOST_HAS_PRAGMA_ONCE
29 BOOST_LOG_OPEN_NAMESPACE
33 //! A distinct type that can be used as a fake argument type in constructors filtered by SFINAE
34 struct sfinae_dummy {};
38 BOOST_LOG_CLOSE_NAMESPACE // namespace log
42 #include <boost/log/detail/footer.hpp>
44 #endif // BOOST_LOG_DETAIL_SFINAE_TOOLS_HPP_INCLUDED_