/*
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* Copyright Andrey Semashev 2007 - 2015.
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* Distributed under the Boost Software License, Version 1.0.
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* (See accompanying file LICENSE_1_0.txt or copy at
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* http://www.boost.org/LICENSE_1_0.txt)
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*/
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/*!
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* \file parameter_tools.hpp
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* \author Andrey Semashev
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* \date 28.06.2009
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*
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* \brief This header is the Boost.Log library implementation, see the library documentation
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* at http://www.boost.org/doc/libs/release/libs/log/doc/html/index.html.
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*/
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#ifndef BOOST_LOG_DETAIL_PARAMETER_TOOLS_HPP_INCLUDED_
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#define BOOST_LOG_DETAIL_PARAMETER_TOOLS_HPP_INCLUDED_
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#include <boost/mpl/or.hpp>
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#include <boost/core/enable_if.hpp>
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#include <boost/parameter/keyword.hpp>
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#include <boost/type_traits/is_base_of.hpp>
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#include <boost/preprocessor/control/if.hpp>
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#include <boost/preprocessor/comparison/equal.hpp>
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#include <boost/preprocessor/repetition/enum_params.hpp>
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#include <boost/preprocessor/repetition/enum_binary_params.hpp>
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#include <boost/preprocessor/repetition/repeat_from_to.hpp>
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#include <boost/preprocessor/facilities/intercept.hpp>
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#include <boost/preprocessor/arithmetic/dec.hpp>
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#include <boost/preprocessor/tuple/elem.hpp>
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#include <boost/log/detail/config.hpp>
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#include <boost/log/detail/sfinae_tools.hpp>
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#include <boost/log/detail/header.hpp>
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#ifdef BOOST_HAS_PRAGMA_ONCE
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#pragma once
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#endif
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#ifndef BOOST_LOG_MAX_PARAMETER_ARGS
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//! The maximum number of named arguments that are accepted by constructors and functions
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#define BOOST_LOG_MAX_PARAMETER_ARGS 16
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#endif
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// The macro applies the passed macro with the specified arguments BOOST_LOG_MAX_PARAMETER_ARGS times
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#define BOOST_LOG_PARAMETRIZED_CONSTRUCTORS_GEN(macro, args)\
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public:\
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BOOST_PP_REPEAT_FROM_TO(1, BOOST_LOG_MAX_PARAMETER_ARGS, macro, args)
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#define BOOST_LOG_CTOR_FORWARD_1(z, n, types)\
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template< typename T0 >\
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explicit BOOST_PP_TUPLE_ELEM(2, 0, types)(T0 const& arg0, typename boost::log::aux::enable_if_named_parameters< T0, boost::log::aux::sfinae_dummy >::type = boost::log::aux::sfinae_dummy()) :\
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BOOST_PP_TUPLE_ELEM(2, 1, types)((BOOST_PP_ENUM_PARAMS_Z(z, n, arg))) {}
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#define BOOST_LOG_CTOR_FORWARD_N(z, n, types)\
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template< BOOST_PP_ENUM_PARAMS_Z(z, n, typename T) >\
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explicit BOOST_PP_TUPLE_ELEM(2, 0, types)(BOOST_PP_ENUM_BINARY_PARAMS_Z(z, n, T, const& arg)) :\
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BOOST_PP_TUPLE_ELEM(2, 1, types)((BOOST_PP_ENUM_PARAMS_Z(z, n, arg))) {}
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#define BOOST_LOG_CTOR_FORWARD(z, n, types)\
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BOOST_PP_IF(BOOST_PP_EQUAL(n, 1), BOOST_LOG_CTOR_FORWARD_1, BOOST_LOG_CTOR_FORWARD_N)(z, n, types)
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// The macro expands to a number of templated constructors that aggregate their named arguments
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// into an ArgumentsPack and pass it to the base class constructor.
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#define BOOST_LOG_PARAMETRIZED_CONSTRUCTORS_FORWARD(class_type, base_type)\
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BOOST_LOG_PARAMETRIZED_CONSTRUCTORS_GEN(BOOST_LOG_CTOR_FORWARD, (class_type, base_type))
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#define BOOST_LOG_CTOR_CALL_1(z, n, types)\
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template< typename T0 >\
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explicit BOOST_PP_TUPLE_ELEM(2, 0, types)(T0 const& arg0, typename boost::log::aux::enable_if_named_parameters< T0, boost::log::aux::sfinae_dummy >::type = boost::log::aux::sfinae_dummy())\
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{ BOOST_PP_TUPLE_ELEM(2, 1, types)((BOOST_PP_ENUM_PARAMS_Z(z, n, arg))); }
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#define BOOST_LOG_CTOR_CALL_N(z, n, types)\
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template< BOOST_PP_ENUM_PARAMS_Z(z, n, typename T) >\
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explicit BOOST_PP_TUPLE_ELEM(2, 0, types)(BOOST_PP_ENUM_BINARY_PARAMS_Z(z, n, T, const& arg))\
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{ BOOST_PP_TUPLE_ELEM(2, 1, types)((BOOST_PP_ENUM_PARAMS_Z(z, n, arg))); }
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#define BOOST_LOG_CTOR_CALL(z, n, types)\
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BOOST_PP_IF(BOOST_PP_EQUAL(n, 1), BOOST_LOG_CTOR_CALL_1, BOOST_LOG_CTOR_CALL_N)(z, n, types)
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// The macro expands to a number of templated constructors that aggregate their named arguments
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// into an ArgumentsPack and pass it to a function call.
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#define BOOST_LOG_PARAMETRIZED_CONSTRUCTORS_CALL(class_type, fun)\
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BOOST_LOG_PARAMETRIZED_CONSTRUCTORS_GEN(BOOST_LOG_CTOR_CALL, (class_type, fun))
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namespace boost {
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BOOST_LOG_OPEN_NAMESPACE
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namespace aux {
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// Yeah, not too cute. The empty_arg_list class should really be public.
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// https://svn.boost.org/trac/boost/ticket/7247
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typedef boost::parameter::aux::empty_arg_list empty_arg_list;
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#if !(defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES) || defined(BOOST_LOG_NO_CXX11_ARG_PACKS_TO_NON_VARIADIC_ARGS_EXPANSION))
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//! The metafunction generates argument pack
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template< typename ArgT0, typename... ArgsT >
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struct make_arg_list
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{
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typedef boost::parameter::aux::arg_list< ArgT0, typename make_arg_list< ArgsT... >::type > type;
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};
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template< typename ArgT0 >
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struct make_arg_list< ArgT0 >
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{
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typedef boost::parameter::aux::arg_list< ArgT0 > type;
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};
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#else
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//! The metafunction generates argument pack
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template< typename ArgT0, BOOST_PP_ENUM_BINARY_PARAMS(BOOST_PP_DEC(BOOST_LOG_MAX_PARAMETER_ARGS), typename T, = void BOOST_PP_INTERCEPT) >
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struct make_arg_list
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{
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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;
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};
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template< typename ArgT0 >
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struct make_arg_list< ArgT0, BOOST_PP_ENUM_PARAMS(BOOST_PP_DEC(BOOST_LOG_MAX_PARAMETER_ARGS), void BOOST_PP_INTERCEPT) >
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{
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typedef boost::parameter::aux::arg_list< ArgT0 > type;
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};
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#endif
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#if !defined(BOOST_NO_CXX11_TEMPLATE_ALIASES)
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template< typename T, typename R >
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using enable_if_named_parameters = boost::enable_if_c< boost::mpl::or_< boost::is_base_of< boost::parameter::aux::tagged_argument_base, T >, boost::is_base_of< empty_arg_list, T > >::value, R >;
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#else // !defined(BOOST_NO_CXX11_TEMPLATE_ALIASES)
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template< typename T, typename R >
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struct enable_if_named_parameters :
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public boost::enable_if_c< boost::mpl::or_< boost::is_base_of< boost::parameter::aux::tagged_argument_base, T >, boost::is_base_of< empty_arg_list, T > >::value, R >
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{
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};
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#endif // !defined(BOOST_NO_CXX11_TEMPLATE_ALIASES)
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} // namespace aux
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BOOST_LOG_CLOSE_NAMESPACE // namespace log
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} // namespace boost
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#include <boost/log/detail/footer.hpp>
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#endif // BOOST_LOG_DETAIL_PARAMETER_TOOLS_HPP_INCLUDED_
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