1 // Copyright (C) 2020-2021 Free Software Foundation, Inc.
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
18 // { dg-options "-std=gnu++2a" }
19 // { dg-do run { target c++2a } }
20
21 #include <vector>
22 #include <testsuite_hooks.h>
23
24 void
test01()25 test01()
26 {
27 std::vector<bool> c1{ 1, 0, 1 }, c2{ 1, 0, 1, 0 }, c3{ 1, 1, 1 };
28 VERIFY( c1 == c1 );
29 VERIFY( std::is_eq(c1 <=> c1) );
30 VERIFY( c1 < c2 );
31 VERIFY( std::is_lt(c1 <=> c2) );
32 VERIFY( c1 < c3 );
33 VERIFY( std::is_lt(c1 <=> c3) );
34 VERIFY( c2 < c3 );
35 VERIFY( std::is_lt(c2 <=> c3) );
36
37 static_assert( std::totally_ordered<std::vector<bool>> );
38
39 static_assert( std::three_way_comparable<std::vector<bool>,
40 std::strong_ordering> );
41 }
42
43 void
test05()44 test05()
45 {
46 // vector<bool> iterators are random access, so should support <=>
47
48 std::vector<bool> c{ 1, 1, 1 };
49 VERIFY( c.begin() == c.cbegin() );
50 VERIFY( std::is_eq(c.begin() <=> c.cbegin()) );
51
52 VERIFY( c.begin() < c.end() );
53 VERIFY( std::is_lt(c.begin() <=> c.end()) );
54
55 VERIFY( c.begin() < c.cend() );
56 VERIFY( std::is_lt(c.begin() <=> c.cend()) );
57
58 VERIFY( c.crbegin() == c.rbegin() );
59 VERIFY( std::is_eq(c.crbegin() <=> c.rbegin()) );
60
61 VERIFY( c.rend() > c.rbegin() );
62 VERIFY( std::is_gt(c.rend() <=> c.rbegin()) );
63
64 static_assert( std::same_as<decltype(c.begin() <=> c.begin()),
65 std::strong_ordering> );
66 }
67
68 int
main()69 main()
70 {
71 test01();
72 test05();
73 }
74