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1 // { dg-options "-std=gnu++0x" }
2
3 // Copyright (C) 2008, 2009 Free Software Foundation
4 //
5 // This file is part of the GNU ISO C++ Library. This library is free
6 // software; you can redistribute it and/or modify it under the
7 // terms of the GNU General Public License as published by the
8 // Free Software Foundation; either version 3, or (at your option)
9 // any later version.
10
11 // This library is distributed in the hope that it will be useful,
12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 // GNU General Public License for more details.
15
16 // You should have received a copy of the GNU General Public License along
17 // with this library; see the file COPYING3. If not see
18 // <http://www.gnu.org/licenses/>.
19
20 // 20.8.13.4 Template class owner_less [util.smartptr.ownerless]
21
22 #include <memory>
23 #include <algorithm>
24 #include <testsuite_hooks.h>
25
26 struct A { };
27
28 struct B { A a[2]; };
29
30 // 20.8.13.4 Template class owner_less [util.smartptr.ownerless]
31
32 int
33 test01()
34 {
35 bool test __attribute__((unused)) = true;
36
37 // test empty shared_ptrs compare equivalent
38 std::owner_less<std::shared_ptr<A>> less;
39 std::owner_less<std::weak_ptr<A>> wless;
40 std::shared_ptr<A> p1;
41 std::shared_ptr<A> p2;
42 VERIFY( !less(p1, p2) && !less(p2, p1) );
43 std::weak_ptr<A> p3;
44 VERIFY( !less(p1, p3) && !less(p3, p1) );
45 VERIFY( !wless(p1, p3) && !wless(p3, p1) );
46 return 0;
47 }
48
49
50 // Construction from pointer
51 int
52 test02()
53 {
54 bool test __attribute__((unused)) = true;
55
56 std::owner_less<std::shared_ptr<A>> less;
57 std::owner_less<std::weak_ptr<A>> wless;
58
59 std::shared_ptr<A> empty;
60
61 std::shared_ptr<A> a1(new A);
62 VERIFY( less(empty, a1) || less(a1, empty) );
63
64 std::shared_ptr<A> a2(new A);
65 VERIFY( less(a1, a2) || less(a2, a1) );
66
67 std::weak_ptr<A> w1(a1);
68 VERIFY( !less(a1, w1) && !less(w1, a1) );
69
70 std::weak_ptr<A> w2(a2);
71 VERIFY( wless(w1, w2) || wless(w2, w1) );
72
73 a1.reset();
74 VERIFY( !less(empty, a1) && !less(a1, empty) );
75 VERIFY( less(a1, w1) || less(w1, a1) );
76
77 a2.reset();
78 VERIFY( !less(a2, a1) && !less(a1, a2) );
79
80 return 0;
81 }
82
83 // aliasing
84 int
85 test03()
86 {
87 bool test __attribute__((unused)) = true;
88
89 std::owner_less<std::shared_ptr<A>> less;
90 std::owner_less<std::weak_ptr<A>> wless;
91
92 std::shared_ptr<B> b(new B);
93 std::shared_ptr<A> a0(b, &b->a[0]);
94 std::shared_ptr<A> a1(b, &b->a[1]);
95 // values are different but owners are equivalent:
96 VERIFY( a0 < a1 && !less(a0, a1) && !less(a1, a0) );
97
98 std::weak_ptr<A> w0(a0);
99 std::weak_ptr<A> w1(a1);
100 VERIFY( !wless(w0, w1) && !wless(w1, w0) );
101 VERIFY( !less(a0, w1) && !less(w1, a0) );
102 VERIFY( !wless(w0, a1) && !wless(a1, w0) );
103
104 return 0;
105 }
106
107 // strict weak ordering
108 int
109 test04()
110 {
111 bool test __attribute__((unused)) = true;
112
113 std::owner_less<std::shared_ptr<A>> less;
114
115 std::shared_ptr<A> a[3];
116 a[0].reset(new A);
117 a[1].reset(new A);
118 a[2].reset(new A);
119 std::sort(a, a+3, less);
120 VERIFY( !less(a[0], a[0]) );
121 VERIFY( less(a[0], a[1]) && !less(a[1], a[0]) );
122 VERIFY( less(a[0], a[1]) && less(a[1], a[2]) && less(a[0], a[2]) );
123
124 return 0;
125 }
126
127 int
128 main()
129 {
130 test01();
131 test02();
132 test03();
133 test04();
134 return 0;
135 }