// Copyright Frank Mori Hess 2009
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//
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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_DETAIL_VARIADIC_ARG_TYPE_HPP
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#define BOOST_SIGNALS2_DETAIL_VARIADIC_ARG_TYPE_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 detail
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{
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template<unsigned, typename ... Args> class variadic_arg_type;
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template<typename T, typename ... Args> class variadic_arg_type<0, T, Args...>
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{
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public:
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typedef T type;
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};
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template<unsigned n, typename T, typename ... Args> class variadic_arg_type<n, T, Args...>
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{
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public:
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typedef typename variadic_arg_type<n - 1, Args...>::type type;
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};
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template <typename ... Args>
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struct std_functional_base
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{};
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template <typename T1>
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struct std_functional_base<T1>
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{
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typedef T1 argument_type;
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};
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template <typename T1, typename T2>
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struct std_functional_base<T1, T2>
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{
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typedef T1 first_argument_type;
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typedef T2 second_argument_type;
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};
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} // namespace detail
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} // namespace signals2
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} // namespace boost
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#endif // BOOST_SIGNALS2_DETAIL_VARIADIC_ARG_TYPE_HPP
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