| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| |
| // <functional> |
| |
| // template<Returnable R, class T> unspecified mem_fn(R T::* pm); |
| |
| #include <functional> |
| #include <cassert> |
| |
| struct A |
| { |
| double data_; |
| }; |
| |
| template <class F> |
| void |
| test(F f) |
| { |
| { |
| A a; |
| f(a) = 5; |
| assert(a.data_ == 5); |
| A* ap = &a; |
| f(ap) = 6; |
| assert(a.data_ == 6); |
| const A* cap = ap; |
| assert(f(cap) == f(ap)); |
| f(cap) = 7; |
| } |
| } |
| |
| int main(int, char**) |
| { |
| test(std::mem_fn(&A::data_)); |
| |
| return 0; |
| } |