/* | |
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 | |
// support for function types is currently broken in Boost.Parameter | |
// #define BOOST_SIGNALS2_NAMED_SIGNATURE_PARAMETER | |
#include <boost/signals2/signal.hpp> | |
#if !defined(BOOST_PARAMETER_MAX_ARITY) | |
#define BOOST_PARAMETER_MAX_ARITY 7 | |
#else | |
#if BOOST_PARAMETER_MAX_ARITY < 7 | |
#error This header requires BOOST_PARAMETER_MAX_ARITY to be defined as 7 or greater prior to including Boost.Parameter headers | |
#endif // BOOST_PARAMETER_MAX_ARITY < 7 | |
#endif // !defined(BOOST_PARAMETER_MAX_ARITY) | |
#include <boost/parameter.hpp> | |
#include <boost/type_traits/is_function.hpp> | |
namespace boost | |
{ | |
namespace signals2 | |
{ | |
namespace keywords | |
{ | |
#ifdef BOOST_SIGNALS2_NAMED_SIGNATURE_PARAMETER | |
BOOST_PARAMETER_TEMPLATE_KEYWORD(signature_type) | |
#endif | |
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 < | |
#ifdef BOOST_SIGNALS2_NAMED_SIGNATURE_PARAMETER | |
typename A0, | |
#else | |
typename Signature, | |
#endif | |
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< | |
#ifdef BOOST_SIGNALS2_NAMED_SIGNATURE_PARAMETER | |
parameter::required<keywords::tag::signature_type, is_function<boost::mpl::_> >, | |
#endif | |
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< | |
#ifdef BOOST_SIGNALS2_NAMED_SIGNATURE_PARAMETER | |
A0, | |
#endif | |
A1, A2, A3, A4, A5, A6>::type | |
args; | |
#ifdef BOOST_SIGNALS2_NAMED_SIGNATURE_PARAMETER | |
typedef typename parameter::value_type<args, keywords::tag::signature_type>::type | |
signature_type; | |
#else | |
typedef Signature signature_type; | |
#endif | |
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 |