// 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_DETAIL_VARIADIC_ARG_TYPE_HPP
#define BOOST_SIGNALS2_DETAIL_VARIADIC_ARG_TYPE_HPP
#include <functional>
namespace boost
{
namespace signals2
{
namespace detail
{
template<unsigned, typename ... Args> class variadic_arg_type;
template<typename T, typename ... Args> class variadic_arg_type<0, T, Args...>
{
public:
typedef T type;
};
template<unsigned n, typename T, typename ... Args> class variadic_arg_type<n, T, Args...>
{
public:
typedef typename variadic_arg_type<n - 1, Args...>::type type;
};
template <typename ... Args>
struct std_functional_base
{};
template <typename T1>
struct std_functional_base<T1>
{
typedef T1 argument_type;
};
template <typename T1, typename T2>
struct std_functional_base<T1, T2>
{
typedef T1 first_argument_type;
typedef T2 second_argument_type;
};
} // namespace detail
} // namespace signals2
} // namespace boost
#endif // BOOST_SIGNALS2_DETAIL_VARIADIC_ARG_TYPE_HPP