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, c++17, c++20
10
11// <memory>
12
13// [out.ptr.t], class template out_ptr_t
14// template<class Smart, class Pointer, class... Args>
15// class out_ptr_t; // since c++23
16
17// operator Pointer*() const noexcept;
18// operator void**() const noexcept;
19
20#include <cassert>
21#include <concepts>
22#include <memory>
23
24int main(int, char**) {
25 // operator Pointer*()
26 {
27 std::unique_ptr<int> uPtr;
28
29 const std::out_ptr_t<std::unique_ptr<int>, int*> oPtr{uPtr};
30
31 static_assert(noexcept(oPtr.operator int**()));
32 std::same_as<int**> decltype(auto) pPtr = oPtr.operator int**();
33
34 assert(*pPtr == nullptr);
35 }
36
37 {
38 std::unique_ptr<int, std::default_delete<int>> uPtr;
39
40 const std::out_ptr_t<decltype(uPtr), int*, std::default_delete<int>> oPtr{uPtr, std::default_delete<int>{}};
41
42 static_assert(noexcept(oPtr.operator int**()));
43 std::same_as<int**> decltype(auto) pPtr = oPtr.operator int**();
44
45 assert(*pPtr == nullptr);
46 }
47
48 // operator void**()
49 {
50 std::unique_ptr<int> uPtr;
51
52 const std::out_ptr_t<std::unique_ptr<int>, void*> oPtr{uPtr};
53
54 static_assert(noexcept(oPtr.operator void**()));
55 std::same_as<void**> decltype(auto) pPtr = oPtr.operator void**();
56
57 assert(*pPtr == nullptr);
58 }
59
60 return 0;
61}
62

source code of libcxx/test/std/utilities/smartptr/adapt/out_ptr/out_ptr_t.convert.pass.cpp