1 // { dg-do run { target c++11 } }
2
3 // Copyright (C) 2008-2018 Free Software Foundation, Inc.
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 // 20.8.13.2 Template class shared_ptr [util.smartptr.shared]
21
22 #include <memory>
23 #include <testsuite_hooks.h>
24
25 struct A { };
26
27 namespace std
28 {
29 template<>
30 struct less<A*> : binary_function<A*,A*,bool>
31 {
32 static int count;
operator ()std::less33 bool operator()(A* l, A* r) { ++count; return l < r; }
34 };
35 int less<A*>::count = 0;
36 }
37
38 // 20.8.13.2.7 shared_ptr comparison [util.smartptr.shared.cmp]
39
40
41 int
test01()42 test01()
43 {
44 std::less<std::shared_ptr<A>> less;
45 // test empty shared_ptrs compare equivalent
46 std::shared_ptr<A> p1;
47 std::shared_ptr<A> p2;
48 VERIFY( !less(p1, p2) && !less(p2, p1) );
49 VERIFY( std::less<A*>::count == 2 );
50 return 0;
51 }
52
53
54 // Construction from pointer
55 int
test02()56 test02()
57 {
58 std::less<std::shared_ptr<A>> less;
59
60 std::shared_ptr<A> empty;
61 std::shared_ptr<A> p1(new A);
62 std::shared_ptr<A> p2(new A);
63
64 VERIFY( less(p1, p2) || less(p2, p1) );
65 VERIFY( !(less(p1, p2) && less(p2, p1)) );
66
67 p1.reset();
68 VERIFY( !less(p1, empty) && !less(empty, p1) );
69
70 p2.reset();
71 VERIFY( !less(p1, p2) && !less(p2, p1) );
72
73 return 0;
74 }
75
76 // Aliasing
77 int
test03()78 test03()
79 {
80 std::less<std::shared_ptr<A>> less;
81
82 A a;
83 std::shared_ptr<A> p1(new A);
84 std::shared_ptr<A> p2(p1, &a);
85 VERIFY( less(p1, p2) || less(p2, p1) );
86
87 return 0;
88 }
89 int
main()90 main()
91 {
92 test01();
93 test02();
94 test03();
95 return 0;
96 }
97