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
10
11// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_ENABLE_CXX20_REMOVED_TEMPORARY_BUFFER
12// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS
13
14// <memory>
15
16// template <class T>
17// pair<T*, ptrdiff_t>
18// get_temporary_buffer(ptrdiff_t n);
19//
20// template <class T>
21// void
22// return_temporary_buffer(T* p);
23
24#include <cassert>
25#include <cstddef>
26#include <cstdint>
27#include <memory>
28#include <utility>
29
30struct alignas(32) A {
31 int field;
32};
33
34int main(int, char**)
35{
36 std::pair<A*, std::ptrdiff_t> ip = std::get_temporary_buffer<A>(len: 5);
37 assert(!(ip.first == nullptr) ^ (ip.second == 0));
38 assert(reinterpret_cast<std::uintptr_t>(ip.first) % alignof(A) == 0);
39 std::return_temporary_buffer(p: ip.first);
40
41 return 0;
42}
43

source code of libcxx/test/std/utilities/memory/temporary.buffer/overaligned.pass.cpp