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