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52066eae | 1 | // { dg-do run { target c++11 } } |
7cc9022f | 2 | // { dg-require-effective-target hosted } |
8dd5e93a | 3 | |
83ffe9cd | 4 | // Copyright (C) 2008-2023 Free Software Foundation, Inc. |
8dd5e93a JW |
5 | // |
6 | // This file is part of the GNU ISO C++ Library. This library is free | |
7 | // software; you can redistribute it and/or modify it under the | |
8 | // terms of the GNU General Public License as published by the | |
748086b7 | 9 | // Free Software Foundation; either version 3, or (at your option) |
8dd5e93a JW |
10 | // any later version. |
11 | ||
12 | // This library is distributed in the hope that it will be useful, | |
13 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | // GNU General Public License for more details. | |
16 | ||
17 | // You should have received a copy of the GNU General Public License along | |
748086b7 JJ |
18 | // with this library; see the file COPYING3. If not see |
19 | // <http://www.gnu.org/licenses/>. | |
8dd5e93a JW |
20 | |
21 | // 20.8.13.4 Template class owner_less [util.smartptr.ownerless] | |
22 | ||
23 | #include <memory> | |
24 | #include <algorithm> | |
25 | #include <testsuite_hooks.h> | |
26 | ||
27 | struct A { }; | |
28 | ||
29 | struct B { A a[2]; }; | |
30 | ||
31 | // 20.8.13.4 Template class owner_less [util.smartptr.ownerless] | |
32 | ||
33 | int | |
34 | test01() | |
35 | { | |
2ea25939 JW |
36 | // test empty shared_ptrs compare equivalent |
37 | std::owner_less<std::shared_ptr<A>> less; | |
38 | std::owner_less<std::weak_ptr<A>> wless; | |
39 | std::shared_ptr<A> p1; | |
40 | std::shared_ptr<A> p2; | |
41 | VERIFY( !less(p1, p2) && !less(p2, p1) ); | |
42 | std::weak_ptr<A> p3; | |
43 | VERIFY( !less(p1, p3) && !less(p3, p1) ); | |
44 | VERIFY( !wless(p1, p3) && !wless(p3, p1) ); | |
45 | return 0; | |
8dd5e93a JW |
46 | } |
47 | ||
48 | ||
49 | // Construction from pointer | |
50 | int | |
51 | test02() | |
52 | { | |
53 | std::owner_less<std::shared_ptr<A>> less; | |
54 | std::owner_less<std::weak_ptr<A>> wless; | |
55 | ||
56 | std::shared_ptr<A> empty; | |
57 | ||
58 | std::shared_ptr<A> a1(new A); | |
59 | VERIFY( less(empty, a1) || less(a1, empty) ); | |
60 | ||
61 | std::shared_ptr<A> a2(new A); | |
62 | VERIFY( less(a1, a2) || less(a2, a1) ); | |
63 | ||
64 | std::weak_ptr<A> w1(a1); | |
65 | VERIFY( !less(a1, w1) && !less(w1, a1) ); | |
66 | ||
67 | std::weak_ptr<A> w2(a2); | |
68 | VERIFY( wless(w1, w2) || wless(w2, w1) ); | |
69 | ||
70 | a1.reset(); | |
71 | VERIFY( !less(empty, a1) && !less(a1, empty) ); | |
72 | VERIFY( less(a1, w1) || less(w1, a1) ); | |
73 | ||
74 | a2.reset(); | |
75 | VERIFY( !less(a2, a1) && !less(a1, a2) ); | |
76 | ||
77 | return 0; | |
78 | } | |
79 | ||
80 | // aliasing | |
81 | int | |
82 | test03() | |
83 | { | |
84 | std::owner_less<std::shared_ptr<A>> less; | |
85 | std::owner_less<std::weak_ptr<A>> wless; | |
86 | ||
87 | std::shared_ptr<B> b(new B); | |
88 | std::shared_ptr<A> a0(b, &b->a[0]); | |
89 | std::shared_ptr<A> a1(b, &b->a[1]); | |
90 | // values are different but owners are equivalent: | |
91 | VERIFY( a0 < a1 && !less(a0, a1) && !less(a1, a0) ); | |
92 | ||
93 | std::weak_ptr<A> w0(a0); | |
94 | std::weak_ptr<A> w1(a1); | |
95 | VERIFY( !wless(w0, w1) && !wless(w1, w0) ); | |
96 | VERIFY( !less(a0, w1) && !less(w1, a0) ); | |
97 | VERIFY( !wless(w0, a1) && !wless(a1, w0) ); | |
98 | ||
99 | return 0; | |
100 | } | |
101 | ||
102 | // strict weak ordering | |
103 | int | |
104 | test04() | |
105 | { | |
106 | std::owner_less<std::shared_ptr<A>> less; | |
107 | ||
108 | std::shared_ptr<A> a[3]; | |
109 | a[0].reset(new A); | |
110 | a[1].reset(new A); | |
111 | a[2].reset(new A); | |
112 | std::sort(a, a+3, less); | |
113 | VERIFY( !less(a[0], a[0]) ); | |
114 | VERIFY( less(a[0], a[1]) && !less(a[1], a[0]) ); | |
115 | VERIFY( less(a[0], a[1]) && less(a[1], a[2]) && less(a[0], a[2]) ); | |
116 | ||
117 | return 0; | |
118 | } | |
119 | ||
120 | int | |
121 | main() | |
122 | { | |
123 | test01(); | |
124 | test02(); | |
125 | test03(); | |
126 | test04(); | |
127 | return 0; | |
128 | } |