| // 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 R, typename ... Args> |
| struct std_functional_base |
| {}; |
| template <typename R, typename T1> |
| struct std_functional_base<R, T1>: public std::unary_function<T1, R> |
| {}; |
| template <typename R, typename T1, typename T2> |
| struct std_functional_base<R, T1, T2>: public std::binary_function<T1, T2, R> |
| {}; |
| } // namespace detail |
| } // namespace signals2 |
| } // namespace boost |
| |
| |
| #endif // BOOST_SIGNALS2_DETAIL_VARIADIC_ARG_TYPE_HPP |