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// <memory>
10
11// unique_ptr
12
13// The deleter is not called if get() == 0
14
15#include <memory>
16#include <cassert>
17
18#include "test_macros.h"
19
20class Deleter {
21 int state_;
22
23 Deleter(Deleter&);
24 Deleter& operator=(Deleter&);
25
26public:
27 TEST_CONSTEXPR_CXX23 Deleter() : state_(0) {}
28
29 TEST_CONSTEXPR_CXX23 int state() const { return state_; }
30
31 TEST_CONSTEXPR_CXX23 void operator()(void*) { ++state_; }
32};
33
34template <class T>
35TEST_CONSTEXPR_CXX23 void test_basic() {
36 Deleter d;
37 assert(d.state() == 0);
38 {
39 std::unique_ptr<T, Deleter&> p(nullptr, d);
40 assert(p.get() == nullptr);
41 assert(&p.get_deleter() == &d);
42 }
43 assert(d.state() == 0);
44}
45
46TEST_CONSTEXPR_CXX23 bool test() {
47 test_basic<int>();
48 test_basic<int[]>();
49
50 return true;
51}
52
53int main(int, char**) {
54 test();
55#if TEST_STD_VER >= 23
56 static_assert(test());
57#endif
58
59 return 0;
60}
61

source code of libcxx/test/std/utilities/smartptr/unique.ptr/unique.ptr.class/unique.ptr.dtor/null.pass.cpp