| //===----------------------------------------------------------------------===// |
| // |
| // 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> |
| |
| // class function<R(ArgTypes...)> |
| |
| // template<typename T> |
| // requires Callable<T, ArgTypes...> && Convertible<Callable<T, ArgTypes...>::result_type, R> |
| // T* |
| // target(); |
| // template<typename T> |
| // requires Callable<T, ArgTypes...> && Convertible<Callable<T, ArgTypes...>::result_type, R> |
| // const T* |
| // target() const; |
| |
| #include <functional> |
| #include <new> |
| #include <cstdlib> |
| #include <cassert> |
| |
| class A |
| { |
| int data_[10]; |
| public: |
| static int count; |
| |
| A() |
| { |
| ++count; |
| for (int i = 0; i < 10; ++i) |
| data_[i] = i; |
| } |
| |
| A(const A&) {++count;} |
| |
| ~A() {--count;} |
| |
| int operator()(int i) const |
| { |
| for (int j = 0; j < 10; ++j) |
| i += data_[j]; |
| return i; |
| } |
| |
| int foo(int) const {return 1;} |
| }; |
| |
| int A::count = 0; |
| |
| int g(int) {return 0;} |
| |
| int main() |
| { |
| { |
| std::function<int(int)> f = A(); |
| assert(A::count == 1); |
| assert(f.target<A>()); |
| assert(f.target<int(*)(int)>() == 0); |
| } |
| assert(A::count == 0); |
| { |
| std::function<int(int)> f = g; |
| assert(A::count == 0); |
| assert(f.target<int(*)(int)>()); |
| assert(f.target<A>() == 0); |
| } |
| assert(A::count == 0); |
| { |
| const std::function<int(int)> f = A(); |
| assert(A::count == 1); |
| assert(f.target<A>()); |
| assert(f.target<int(*)(int)>() == 0); |
| } |
| assert(A::count == 0); |
| { |
| const std::function<int(int)> f = g; |
| assert(A::count == 0); |
| assert(f.target<int(*)(int)>()); |
| assert(f.target<A>() == 0); |
| } |
| assert(A::count == 0); |
| } |