Chris@16: /*
Chris@101:  *          Copyright Andrey Semashev 2007 - 2015.
Chris@16:  * Distributed under the Boost Software License, Version 1.0.
Chris@16:  *    (See accompanying file LICENSE_1_0.txt or copy at
Chris@16:  *          http://www.boost.org/LICENSE_1_0.txt)
Chris@16:  */
Chris@16: /*!
Chris@16:  * \file   parameter_tools.hpp
Chris@16:  * \author Andrey Semashev
Chris@16:  * \date   28.06.2009
Chris@16:  *
Chris@16:  * \brief  This header is the Boost.Log library implementation, see the library documentation
Chris@16:  *         at http://www.boost.org/doc/libs/release/libs/log/doc/html/index.html.
Chris@16:  */
Chris@16: 
Chris@16: #ifndef BOOST_LOG_DETAIL_PARAMETER_TOOLS_HPP_INCLUDED_
Chris@16: #define BOOST_LOG_DETAIL_PARAMETER_TOOLS_HPP_INCLUDED_
Chris@16: 
Chris@16: #include <boost/parameter/keyword.hpp>
Chris@16: #include <boost/preprocessor/repetition/enum_params.hpp>
Chris@16: #include <boost/preprocessor/repetition/enum_binary_params.hpp>
Chris@16: #include <boost/preprocessor/repetition/repeat_from_to.hpp>
Chris@16: #include <boost/preprocessor/facilities/intercept.hpp>
Chris@16: #include <boost/preprocessor/arithmetic/dec.hpp>
Chris@16: #include <boost/preprocessor/tuple/elem.hpp>
Chris@16: #include <boost/log/detail/config.hpp>
Chris@16: #include <boost/log/detail/header.hpp>
Chris@16: 
Chris@16: #ifdef BOOST_HAS_PRAGMA_ONCE
Chris@16: #pragma once
Chris@16: #endif
Chris@16: 
Chris@16: #ifndef BOOST_LOG_MAX_PARAMETER_ARGS
Chris@16: //! The maximum number of named arguments that are accepted by constructors and functions
Chris@16: #define BOOST_LOG_MAX_PARAMETER_ARGS 16
Chris@16: #endif
Chris@16: 
Chris@16: // The macro applies the passed macro with the specified arguments BOOST_LOG_MAX_PARAMETER_ARGS times
Chris@16: #define BOOST_LOG_PARAMETRIZED_CONSTRUCTORS_GEN(macro, args)\
Chris@16:     public:\
Chris@16:         BOOST_PP_REPEAT_FROM_TO(1, BOOST_LOG_MAX_PARAMETER_ARGS, macro, args)
Chris@16: 
Chris@16: 
Chris@16: #define BOOST_LOG_CTOR_FORWARD(z, n, types)\
Chris@16:     template< BOOST_PP_ENUM_PARAMS(n, typename T) >\
Chris@16:     explicit BOOST_PP_TUPLE_ELEM(2, 0, types)(BOOST_PP_ENUM_BINARY_PARAMS(n, T, const& arg)) :\
Chris@16:         BOOST_PP_TUPLE_ELEM(2, 1, types)((BOOST_PP_ENUM_PARAMS(n, arg))) {}
Chris@16: 
Chris@16: // The macro expands to a number of templated constructors that aggregate their named arguments
Chris@16: // into an ArgumentsPack and pass it to the base class constructor.
Chris@16: #define BOOST_LOG_PARAMETRIZED_CONSTRUCTORS_FORWARD(class_type, base_type)\
Chris@16:     BOOST_LOG_PARAMETRIZED_CONSTRUCTORS_GEN(BOOST_LOG_CTOR_FORWARD, (class_type, base_type))
Chris@16: 
Chris@16: 
Chris@16: #define BOOST_LOG_CTOR_CALL(z, n, types)\
Chris@16:     template< BOOST_PP_ENUM_PARAMS(n, typename T) >\
Chris@16:     explicit BOOST_PP_TUPLE_ELEM(2, 0, types)(BOOST_PP_ENUM_BINARY_PARAMS(n, T, const& arg))\
Chris@16:     { BOOST_PP_TUPLE_ELEM(2, 1, types)((BOOST_PP_ENUM_PARAMS(n, arg))); }
Chris@16: 
Chris@16: // The macro expands to a number of templated constructors that aggregate their named arguments
Chris@16: // into an ArgumentsPack and pass it to a function call.
Chris@16: #define BOOST_LOG_PARAMETRIZED_CONSTRUCTORS_CALL(class_type, fun)\
Chris@16:     BOOST_LOG_PARAMETRIZED_CONSTRUCTORS_GEN(BOOST_LOG_CTOR_CALL, (class_type, fun))
Chris@16: 
Chris@16: namespace boost {
Chris@16: 
Chris@16: BOOST_LOG_OPEN_NAMESPACE
Chris@16: 
Chris@16: namespace aux {
Chris@16: 
Chris@16: // Yeah, not too cute. The empty_arg_list class should really be public.
Chris@16: typedef boost::parameter::aux::empty_arg_list empty_arg_list;
Chris@16: 
Chris@16: #if !(defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES) || defined(BOOST_LOG_NO_CXX11_ARG_PACKS_TO_NON_VARIADIC_ARGS_EXPANSION))
Chris@16: 
Chris@16: //! The metafunction generates argument pack
Chris@16: template< typename ArgT0, typename... ArgsT >
Chris@16: struct make_arg_list
Chris@16: {
Chris@16:     typedef boost::parameter::aux::arg_list< ArgT0, typename make_arg_list< ArgsT... >::type > type;
Chris@16: };
Chris@16: 
Chris@16: template< typename ArgT0 >
Chris@16: struct make_arg_list< ArgT0 >
Chris@16: {
Chris@16:     typedef boost::parameter::aux::arg_list< ArgT0 > type;
Chris@16: };
Chris@16: 
Chris@16: #else
Chris@16: 
Chris@16: //! The metafunction generates argument pack
Chris@16: template< typename ArgT0, BOOST_PP_ENUM_BINARY_PARAMS(BOOST_PP_DEC(BOOST_LOG_MAX_PARAMETER_ARGS), typename T, = void BOOST_PP_INTERCEPT) >
Chris@16: struct make_arg_list
Chris@16: {
Chris@16:     typedef boost::parameter::aux::arg_list< ArgT0, typename make_arg_list< BOOST_PP_ENUM_PARAMS(BOOST_PP_DEC(BOOST_LOG_MAX_PARAMETER_ARGS), T) >::type > type;
Chris@16: };
Chris@16: 
Chris@16: template< typename ArgT0 >
Chris@16: struct make_arg_list< ArgT0, BOOST_PP_ENUM_PARAMS(BOOST_PP_DEC(BOOST_LOG_MAX_PARAMETER_ARGS), void BOOST_PP_INTERCEPT) >
Chris@16: {
Chris@16:     typedef boost::parameter::aux::arg_list< ArgT0 > type;
Chris@16: };
Chris@16: 
Chris@16: #endif
Chris@16: 
Chris@16: } // namespace aux
Chris@16: 
Chris@16: BOOST_LOG_CLOSE_NAMESPACE // namespace log
Chris@16: 
Chris@16: } // namespace boost
Chris@16: 
Chris@16: #include <boost/log/detail/footer.hpp>
Chris@16: 
Chris@16: #endif // BOOST_LOG_DETAIL_PARAMETER_TOOLS_HPP_INCLUDED_