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
22template <bool IsArray>
23TEST_CONSTEXPR_CXX23 void test_basic() {
24 typedef typename std::conditional<IsArray, A[], A>::type VT;
25 const int expect_alive = IsArray ? 5 : 1;
26 {
27 std::unique_ptr<VT> s2(newValue<VT>(expect_alive));
28 if (!TEST_IS_CONSTANT_EVALUATED)
29 assert(A::count == expect_alive);
30 s2 = NULL;
31 if (!TEST_IS_CONSTANT_EVALUATED)
32 assert(A::count == 0);
33 assert(s2.get() == 0);
34 }
35 if (!TEST_IS_CONSTANT_EVALUATED)
36 assert(A::count == 0);
37}
38
39TEST_CONSTEXPR_CXX23 bool test() {
40 test_basic</*IsArray*/ false>();
41 test_basic<true>();
42
43 return true;
44}
45
46int main(int, char**) {
47 test();
48#if TEST_STD_VER >= 23
49 static_assert(test());
50#endif
51
52 return 0;
53}
54

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