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// Test unique_ptr move assignment
14
15#include <memory>
16#include <cassert>
17
18#include "test_macros.h"
19#include "unique_ptr_test_helper.h"
20
21// test assignment from null
22
23template <bool IsArray>
24TEST_CONSTEXPR_CXX23 void test_basic() {
25 typedef typename std::conditional<IsArray, A[], A>::type VT;
26 const int expect_alive = IsArray ? 5 : 1;
27 {
28 std::unique_ptr<VT> s2(newValue<VT>(expect_alive));
29 if (!TEST_IS_CONSTANT_EVALUATED)
30 assert(A::count == expect_alive);
31 s2 = nullptr;
32 if (!TEST_IS_CONSTANT_EVALUATED)
33 assert(A::count == 0);
34 assert(s2.get() == 0);
35 }
36 if (!TEST_IS_CONSTANT_EVALUATED)
37 assert(A::count == 0);
38}
39
40TEST_CONSTEXPR_CXX23 bool test() {
41 test_basic</*IsArray*/ false>();
42 test_basic<true>();
43
44 return true;
45}
46
47int main(int, char**) {
48 test();
49#if TEST_STD_VER >= 23
50 static_assert(test());
51#endif
52
53 return 0;
54}
55

source code of libcxx/test/std/utilities/smartptr/unique.ptr/unique.ptr.class/unique.ptr.asgn/nullptr.pass.cpp