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

   1 /*
   2  *          Copyright Andrey Semashev 2007 - 2015.
   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   native_typeof.hpp
   9  * \author Andrey Semashev
  10  * \date   08.03.2009
  11  *
  12  * 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_NATIVE_TYPEOF_HPP_INCLUDED_
  17 #define BOOST_LOG_DETAIL_NATIVE_TYPEOF_HPP_INCLUDED_
  18
  19 #include <boost/log/detail/config.hpp>
  20
  21 #ifdef BOOST_HAS_PRAGMA_ONCE
  22 #pragma once
  23 #endif
  24
  25 #if !defined(BOOST_NO_CXX11_DECLTYPE)
  26
  27 namespace boost {
  28
  29 BOOST_LOG_OPEN_NAMESPACE
  30
  31 namespace aux {
  32
  33 template< typename T >
  34 T get_root_type(T const&);
  35
  36 } // namespace aux
  37
  38 BOOST_LOG_CLOSE_NAMESPACE // namespace log
  39
  40 } // namespace boost
  41
  42 #define BOOST_LOG_TYPEOF(x) decltype(::boost::log::aux::get_root_type(x))
  43
  44 #elif defined(__COMO__) && defined(__GNUG__)
  45
  46 #define BOOST_LOG_TYPEOF(x) typeof(x)
  47
  48 #elif defined(__GNUC__) || defined(__MWERKS__)
  49
  50 #define BOOST_LOG_TYPEOF(x) __typeof__(x)
  51
  52 #endif
  53
  54
  55 #if !defined(BOOST_NO_CXX11_AUTO_DECLARATIONS)
  56 #define BOOST_LOG_AUTO(var, expr) auto var = (expr)
  57 #endif
  58
  59 #if !defined(BOOST_LOG_AUTO) && defined(BOOST_LOG_TYPEOF)
  60 #define BOOST_LOG_AUTO(var, expr) BOOST_LOG_TYPEOF((expr)) var = (expr)
  61 #endif
  62
  63 #endif // BOOST_LOG_DETAIL_NATIVE_TYPEOF_HPP_INCLUDED_