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 
main(int,char **)20 int main(int, char**) {
21   std::pmr::memory_resource* expected = std::pmr::null_memory_resource();
22   std::pmr::set_default_resource(expected);
23   {
24     char buffer[16];
25     std::pmr::monotonic_buffer_resource r1;
26     std::pmr::monotonic_buffer_resource r2(16);
27     std::pmr::monotonic_buffer_resource r3(buffer, sizeof buffer);
28     assert(r1.upstream_resource() == expected);
29     assert(r2.upstream_resource() == expected);
30     assert(r3.upstream_resource() == expected);
31   }
32 
33   expected = std::pmr::new_delete_resource();
34   std::pmr::set_default_resource(expected);
35   {
36     char buffer[16];
37     std::pmr::monotonic_buffer_resource r1;
38     std::pmr::monotonic_buffer_resource r2(16);
39     std::pmr::monotonic_buffer_resource r3(buffer, sizeof buffer);
40     assert(r1.upstream_resource() == expected);
41     assert(r2.upstream_resource() == expected);
42     assert(r3.upstream_resource() == expected);
43   }
44 
45   return 0;
46 }
47