| //===----------------------------------------------------------------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is dual licensed under the MIT and the University of Illinois Open |
| // Source Licenses. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // <functional> |
| |
| // template<Returnable R, CopyConstructible... ArgTypes> |
| // class function<R(ArgTypes...)> |
| // : public unary_function<T1, R> // iff sizeof...(ArgTypes) == 1 and |
| // // ArgTypes contains T1 |
| // : public binary_function<T1, T2, R> // iff sizeof...(ArgTypes) == 2 and |
| // // ArgTypes contains T1 and T2 |
| // { |
| // public: |
| // typedef R result_type; |
| // ... |
| // }; |
| |
| #include <functional> |
| #include <type_traits> |
| |
| int main() |
| { |
| static_assert((!std::is_base_of<std::unary_function <int, int>, |
| std::function<int()> >::value), ""); |
| static_assert((!std::is_base_of<std::binary_function<int, int, int>, |
| std::function<int()> >::value), ""); |
| static_assert(( std::is_same< std::function<int()>::result_type, |
| int>::value), ""); |
| |
| static_assert(( std::is_base_of<std::unary_function <int, double>, |
| std::function<double(int)> >::value), ""); |
| static_assert((!std::is_base_of<std::binary_function<int, int, double>, |
| std::function<double(int)> >::value), ""); |
| static_assert(( std::is_same< std::function<double(int)>::result_type, |
| double>::value), ""); |
| |
| static_assert((!std::is_base_of<std::unary_function <int, double>, |
| std::function<double(int, char)> >::value), ""); |
| static_assert(( std::is_base_of<std::binary_function<int, char, double>, |
| std::function<double(int, char)> >::value), ""); |
| static_assert(( std::is_same< std::function<double(int, char)>::result_type, |
| double>::value), ""); |
| } |