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