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 swap
14
15#include <memory>
16#include <cassert>
17
18#include "test_macros.h"
19#include "unique_ptr_test_helper.h"
20
21struct TT {
22 int state_;
23 static int count;
24 TEST_CONSTEXPR_CXX23 TT() : state_(-1) {
25 if (!TEST_IS_CONSTANT_EVALUATED)
26 ++count;
27 }
28 TEST_CONSTEXPR_CXX23 explicit TT(int i) : state_(i) {
29 if (!TEST_IS_CONSTANT_EVALUATED)
30 ++count;
31 }
32 TEST_CONSTEXPR_CXX23 TT(const TT& a) : state_(a.state_) {
33 if (!TEST_IS_CONSTANT_EVALUATED)
34 ++count;
35 }
36 TEST_CONSTEXPR_CXX23 TT& operator=(const TT& a) {
37 state_ = a.state_;
38 return *this;
39 }
40 TEST_CONSTEXPR_CXX23 ~TT() {
41 if (!TEST_IS_CONSTANT_EVALUATED)
42 --count;
43 }
44
45 friend TEST_CONSTEXPR_CXX23 bool operator==(const TT& x, const TT& y) { return x.state_ == y.state_; }
46};
47
48int TT::count = 0;
49
50template <class T>
51TEST_CONSTEXPR_CXX23 typename std::remove_all_extents<T>::type* newValueInit(int size, int new_value) {
52 typedef typename std::remove_all_extents<T>::type VT;
53 VT* p = newValue<T>(size);
54 for (int i = 0; i < size; ++i)
55 (p + i)->state_ = new_value;
56 return p;
57}
58
59template <bool IsArray>
60TEST_CONSTEXPR_CXX23 void test_basic() {
61 typedef typename std::conditional<IsArray, TT[], TT>::type VT;
62 const int expect_alive = IsArray ? 5 : 1;
63#if TEST_STD_VER >= 11
64 {
65 using U = std::unique_ptr<VT, Deleter<VT> >;
66 U u; ((void)u);
67 ASSERT_NOEXCEPT(u.swap(u));
68 }
69#endif
70 {
71 TT* p1 = newValueInit<VT>(expect_alive, 1);
72 std::unique_ptr<VT, Deleter<VT> > s1(p1, Deleter<VT>(1));
73 TT* p2 = newValueInit<VT>(expect_alive, 2);
74 std::unique_ptr<VT, Deleter<VT> > s2(p2, Deleter<VT>(2));
75 assert(s1.get() == p1);
76 assert(*s1.get() == TT(1));
77 assert(s1.get_deleter().state() == 1);
78 assert(s2.get() == p2);
79 assert(*s2.get() == TT(2));
80 assert(s2.get_deleter().state() == 2);
81 s1.swap(s2);
82 assert(s1.get() == p2);
83 assert(*s1.get() == TT(2));
84 assert(s1.get_deleter().state() == 2);
85 assert(s2.get() == p1);
86 assert(*s2.get() == TT(1));
87 assert(s2.get_deleter().state() == 1);
88 if (!TEST_IS_CONSTANT_EVALUATED)
89 assert(TT::count == (expect_alive * 2));
90 }
91 if (!TEST_IS_CONSTANT_EVALUATED)
92 assert(TT::count == 0);
93}
94
95TEST_CONSTEXPR_CXX23 bool test() {
96 test_basic</*IsArray*/ false>();
97 test_basic<true>();
98
99 return true;
100}
101
102int main(int, char**) {
103 test();
104#if TEST_STD_VER >= 23
105 static_assert(test());
106#endif
107
108 return 0;
109}
110

source code of libcxx/test/std/utilities/smartptr/unique.ptr/unique.ptr.class/unique.ptr.modifiers/swap.pass.cpp