/*
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A meta function which supports using named template type parameters
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via Boost.Parameter to specify the template type parameters for
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the boost::signals2::signal class.
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Author: Frank Mori Hess <fmhess@users.sourceforge.net>
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Begin: 2009-01-22
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*/
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// Copyright Frank Mori Hess 2009
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// Use, modification and
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// distribution is subject to the Boost Software License, Version
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// 1.0. (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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// For more information, see http://www.boost.org
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#ifndef BOOST_SIGNALS2_SIGNAL_TYPE_HPP
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#define BOOST_SIGNALS2_SIGNAL_TYPE_HPP
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#include <boost/parameter/config.hpp>
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#if BOOST_PARAMETER_MAX_ARITY < 7
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#error Define BOOST_PARAMETER_MAX_ARITY as 7 or greater.
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#endif
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#include <boost/parameter/template_keyword.hpp>
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#include <boost/parameter/parameters.hpp>
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#include <boost/parameter/required.hpp>
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#include <boost/parameter/optional.hpp>
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#include <boost/parameter/value_type.hpp>
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#include <boost/type_traits/is_function.hpp>
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#include <boost/type_traits/function_traits.hpp>
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#include <boost/signals2/signal.hpp>
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#include <functional>
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namespace boost
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{
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namespace signals2
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{
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namespace keywords
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{
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BOOST_PARAMETER_TEMPLATE_KEYWORD(signature_type)
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BOOST_PARAMETER_TEMPLATE_KEYWORD(combiner_type)
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BOOST_PARAMETER_TEMPLATE_KEYWORD(group_type)
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BOOST_PARAMETER_TEMPLATE_KEYWORD(group_compare_type)
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BOOST_PARAMETER_TEMPLATE_KEYWORD(slot_function_type)
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BOOST_PARAMETER_TEMPLATE_KEYWORD(extended_slot_function_type)
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BOOST_PARAMETER_TEMPLATE_KEYWORD(mutex_type)
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} // namespace keywords
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template <
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typename A0,
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typename A1 = parameter::void_,
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typename A2 = parameter::void_,
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typename A3 = parameter::void_,
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typename A4 = parameter::void_,
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typename A5 = parameter::void_,
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typename A6 = parameter::void_
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>
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class signal_type
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{
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typedef parameter::parameters<
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parameter::required<keywords::tag::signature_type, is_function<boost::mpl::_> >,
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parameter::optional<keywords::tag::combiner_type>,
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parameter::optional<keywords::tag::group_type>,
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parameter::optional<keywords::tag::group_compare_type>,
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parameter::optional<keywords::tag::slot_function_type>,
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parameter::optional<keywords::tag::extended_slot_function_type>,
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parameter::optional<keywords::tag::mutex_type>
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> parameter_spec;
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public:
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// ArgumentPack
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typedef typename parameter_spec::bind<A0, A1, A2, A3, A4, A5, A6>::type
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args;
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typedef typename parameter::value_type<args, keywords::tag::signature_type>::type
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signature_type;
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typedef typename parameter::value_type
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<
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args,
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keywords::tag::combiner_type,
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optional_last_value
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<
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typename boost::function_traits<signature_type>::result_type
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>
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>::type combiner_type;
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typedef typename
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parameter::value_type<args, keywords::tag::group_type, int>::type group_type;
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typedef typename
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parameter::value_type<args, keywords::tag::group_compare_type, std::less<group_type> >::type
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group_compare_type;
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typedef typename
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parameter::value_type<args, keywords::tag::slot_function_type, function<signature_type> >::type
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slot_function_type;
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typedef typename
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parameter::value_type
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<
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args,
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keywords::tag::extended_slot_function_type,
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typename detail::extended_signature<function_traits<signature_type>::arity, signature_type>::function_type
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>::type
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extended_slot_function_type;
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typedef typename
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parameter::value_type<args, keywords::tag::mutex_type, mutex>::type mutex_type;
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typedef signal
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<
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signature_type,
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combiner_type,
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group_type,
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group_compare_type,
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slot_function_type,
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extended_slot_function_type,
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mutex_type
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> type;
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};
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} // namespace signals2
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} // namespace boost
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#endif // BOOST_SIGNALS2_SIGNAL_TYPE_HPP
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