boost/log/detail/native_typeof.hpp
/* * Copyright Andrey Semashev 2007 - 2015. * 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) */ /*! * \file native_typeof.hpp * \author Andrey Semashev * \date 08.03.2009 * * This header is the Boost.Log library implementation, see the library documentation * at http://www.boost.org/doc/libs/release/libs/log/doc/html/index.html. */ #ifndef BOOST_LOG_DETAIL_NATIVE_TYPEOF_HPP_INCLUDED_ #define BOOST_LOG_DETAIL_NATIVE_TYPEOF_HPP_INCLUDED_ #include <boost/log/detail/config.hpp> #ifdef BOOST_HAS_PRAGMA_ONCE #pragma once #endif #if !defined(BOOST_NO_CXX11_DECLTYPE) namespace boost { BOOST_LOG_OPEN_NAMESPACE namespace aux { template< typename T > T get_root_type(T const&); } // namespace aux BOOST_LOG_CLOSE_NAMESPACE // namespace log } // namespace boost #define BOOST_LOG_TYPEOF(x) decltype(::boost::log::aux::get_root_type(x)) #elif defined(__COMO__) && defined(__GNUG__) #define BOOST_LOG_TYPEOF(x) typeof(x) #elif defined(__GNUC__) || defined(__MWERKS__) #define BOOST_LOG_TYPEOF(x) __typeof__(x) #endif #if !defined(BOOST_NO_CXX11_AUTO_DECLARATIONS) #define BOOST_LOG_AUTO(var, expr) auto var = (expr) #endif #if !defined(BOOST_LOG_AUTO) && defined(BOOST_LOG_TYPEOF) #define BOOST_LOG_AUTO(var, expr) BOOST_LOG_TYPEOF((expr)) var = (expr) #endif #endif // BOOST_LOG_DETAIL_NATIVE_TYPEOF_HPP_INCLUDED_