| 1 | //===----------------------------------------------------------------------===// |
|---|---|
| 2 | // |
| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| 4 | // See https://llvm.org/LICENSE.txt for license information. |
| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | |
| 9 | // UNSUPPORTED: c++03, c++11, c++14 |
| 10 | // TODO: Change to XFAIL once https://github.com/llvm/llvm-project/issues/40340 is fixed |
| 11 | // UNSUPPORTED: availability-pmr-missing |
| 12 | |
| 13 | // <memory_resource> |
| 14 | |
| 15 | // class monotonic_buffer_resource |
| 16 | |
| 17 | #include <memory_resource> |
| 18 | #include <cassert> |
| 19 | #include <cstddef> // size_t |
| 20 | |
| 21 | struct assert_on_compare : public std::pmr::memory_resource { |
| 22 | void* do_allocate(std::size_t, size_t) override { |
| 23 | assert(false); |
| 24 | return nullptr; |
| 25 | } |
| 26 | |
| 27 | void do_deallocate(void*, std::size_t, size_t) override { assert(false); } |
| 28 | |
| 29 | bool do_is_equal(const std::pmr::memory_resource&) const noexcept override { |
| 30 | assert(false); |
| 31 | return true; |
| 32 | } |
| 33 | }; |
| 34 | |
| 35 | int main(int, char**) { |
| 36 | // Same object |
| 37 | { |
| 38 | std::pmr::monotonic_buffer_resource r1; |
| 39 | std::pmr::monotonic_buffer_resource r2; |
| 40 | assert(r1 == r1); |
| 41 | assert(r1 != r2); |
| 42 | |
| 43 | std::pmr::memory_resource& p1 = r1; |
| 44 | std::pmr::memory_resource& p2 = r2; |
| 45 | assert(p1 == p1); |
| 46 | assert(p1 != p2); |
| 47 | assert(p1 == r1); |
| 48 | assert(r1 == p1); |
| 49 | assert(p1 != r2); |
| 50 | assert(r2 != p1); |
| 51 | } |
| 52 | // Different types |
| 53 | { |
| 54 | std::pmr::monotonic_buffer_resource mono1; |
| 55 | std::pmr::memory_resource& r1 = mono1; |
| 56 | assert_on_compare c; |
| 57 | std::pmr::memory_resource& r2 = c; |
| 58 | assert(r1 != r2); |
| 59 | assert(!(r1 == r2)); |
| 60 | } |
| 61 | |
| 62 | return 0; |
| 63 | } |
| 64 |