1 /*
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)
6  */
7 /*!
8  * \file   sfinae_tools.hpp
9  * \author Andrey Semashev
10  * \date   23.02.2016
11  *
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.
14  */
15 
16 #ifndef BOOST_LOG_DETAIL_SFINAE_TOOLS_HPP_INCLUDED_
17 #define BOOST_LOG_DETAIL_SFINAE_TOOLS_HPP_INCLUDED_
18 
19 #include <boost/log/detail/config.hpp>
20 #include <boost/core/enable_if.hpp>
21 #include <boost/log/detail/header.hpp>
22 
23 #ifdef BOOST_HAS_PRAGMA_ONCE
24 #pragma once
25 #endif
26 
27 namespace boost {
28 
29 BOOST_LOG_OPEN_NAMESPACE
30 
31 namespace aux {
32 
33 //! A distinct type that can be used as a fake argument type in constructors filtered by SFINAE
34 struct sfinae_dummy {};
35 
36 } // namespace aux
37 
38 BOOST_LOG_CLOSE_NAMESPACE // namespace log
39 
40 } // namespace boost
41 
42 #include <boost/log/detail/footer.hpp>
43 
44 #endif // BOOST_LOG_DETAIL_SFINAE_TOOLS_HPP_INCLUDED_
45