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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
// 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
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Swift