ceph/src/boost/boost/log/detail/sfinae_tools.hpp

   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_