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a945c346 | 1 | // Copyright (C) 2020-2024 Free Software Foundation, Inc. |
93843da6 JW |
2 | // |
3 | // This file is part of the GNU ISO C++ Library. This library is free | |
4 | // software; you can redistribute it and/or modify it under the | |
5 | // terms of the GNU General Public License as published by the | |
6 | // Free Software Foundation; either version 3, or (at your option) | |
7 | // any later version. | |
8 | ||
9 | // This library is distributed in the hope that it will be useful, | |
10 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | // GNU General Public License for more details. | |
13 | ||
14 | // You should have received a copy of the GNU General Public License along | |
15 | // with this library; see the file COPYING3. If not see | |
16 | // <http://www.gnu.org/licenses/>. | |
17 | ||
b9a2dce8 | 18 | // { dg-do run { target c++20 } } |
93843da6 JW |
19 | |
20 | #include <set> | |
21 | #include <testsuite_hooks.h> | |
22 | ||
23 | void | |
24 | test01() | |
25 | { | |
26 | std::set<int> c1{ 1, 2, 3 }, c2{ 1, 2, 3, 4 }, c3{ 1, 2, 4 }; | |
27 | VERIFY( c1 == c1 ); | |
28 | VERIFY( std::is_eq(c1 <=> c1) ); | |
29 | VERIFY( c1 < c2 ); | |
30 | VERIFY( std::is_lt(c1 <=> c2) ); | |
31 | VERIFY( c1 < c3 ); | |
32 | VERIFY( std::is_lt(c1 <=> c3) ); | |
33 | VERIFY( c2 < c3 ); | |
34 | VERIFY( std::is_lt(c2 <=> c3) ); | |
35 | ||
36 | static_assert( std::totally_ordered<std::set<int>> ); | |
37 | ||
38 | static_assert( std::three_way_comparable<std::set<int>, | |
39 | std::strong_ordering> ); | |
40 | static_assert( ! std::three_way_comparable<std::set<float>, | |
41 | std::strong_ordering> ); | |
42 | static_assert( ! std::three_way_comparable<std::set<float>, | |
43 | std::weak_ordering> ); | |
44 | static_assert( std::three_way_comparable<std::set<float>, | |
45 | std::partial_ordering> ); | |
46 | ||
47 | struct E | |
48 | { | |
49 | bool operator==(E) { return true; } | |
50 | }; | |
c123096c JW |
51 | struct Cmp |
52 | { | |
53 | bool operator()(E, E) const { return false; } | |
54 | }; | |
55 | static_assert( ! std::totally_ordered<std::set<E, Cmp>> ); | |
93843da6 | 56 | static_assert( ! std::three_way_comparable<E> ); |
c123096c | 57 | static_assert( ! std::three_way_comparable<std::set<E, Cmp>> ); |
93843da6 JW |
58 | } |
59 | ||
60 | void | |
61 | test02() | |
62 | { | |
63 | struct W | |
64 | { | |
65 | int value = 0; | |
66 | ||
67 | bool operator==(W rhs) const noexcept | |
68 | { return (value | 1) == (rhs.value | 1); } | |
69 | ||
70 | std::weak_ordering | |
71 | operator<=>(W rhs) const noexcept | |
72 | { return (value | 1) <=> (rhs.value | 1); } | |
73 | }; | |
74 | ||
75 | static_assert( std::totally_ordered<std::set<W>> ); | |
76 | ||
77 | std::set<W> c1{ {1}, {2}, {3} }, c2{ {0}, {3}, {3} }; | |
78 | static_assert( std::same_as<decltype(c1 <=> c1), std::weak_ordering> ); | |
79 | VERIFY( c1 == c2 ); | |
80 | VERIFY( std::is_eq(c1 <=> c2) ); | |
81 | } | |
82 | ||
83 | void | |
84 | test04() | |
85 | { | |
86 | struct L | |
87 | { | |
88 | int value = 0; | |
89 | ||
90 | bool operator<(L rhs) const noexcept { return value < rhs.value; } | |
91 | }; | |
92 | ||
93 | static_assert( std::totally_ordered<std::set<L>> ); | |
94 | ||
95 | std::set<L> c{ {1}, {2}, {3} }, d{ {1}, {2}, {3}, {4} }; | |
96 | static_assert( std::same_as<decltype(c <=> c), std::weak_ordering> ); | |
97 | VERIFY( std::is_lt(c <=> d) ); | |
98 | } | |
99 | ||
100 | // Associative container iterators are not random access | |
101 | static_assert( ! std::totally_ordered<std::set<int>::iterator> ); | |
102 | static_assert( ! std::three_way_comparable<std::set<int>::iterator> ); | |
103 | ||
104 | int | |
105 | main() | |
106 | { | |
107 | test01(); | |
108 | test02(); | |
109 | test04(); | |
110 | } |