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
|
// Copyright (C) 2019-2023 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 compile { target c++2a } }
#include <concepts>
#include <testsuite_hooks.h>
#include <testsuite_iterators.h>
static_assert(__gnu_test::is_customization_point_object(std::ranges::swap));
namespace nu
{
struct S { bool swapped = false; };
constexpr void swap(S& l, S& r) { l.swapped = r.swapped = true; }
struct T { int i; };
union U { char c; int i; };
constexpr void swap(U& l, U& r) { l.i = r.i = 99; }
}
constexpr bool check_struct_with_adl_swap(int)
{
nu::S s1, s2;
std::ranges::swap(s1, s2);
return s1.swapped && s2.swapped;
}
static_assert(check_struct_with_adl_swap(1));
constexpr bool check_array_with_adl_swap(int)
{
nu::S s1[2], s2[2];
std::ranges::swap(s1, s2);
return s1[0].swapped && s2[0].swapped && s1[1].swapped && s2[1].swapped;
}
static_assert(check_array_with_adl_swap(1));
constexpr bool check_struct_without_adl_swap(int i)
{
nu::T t1{i}, t2{2*i};
std::ranges::swap(t1, t2);
return t1.i == 2*i && t2.i == i;
}
static_assert(check_struct_without_adl_swap(1));
constexpr bool check_array_without_adl_swap(int i)
{
nu::T t1[2]{i, 2*i}, t2[2]{3*i, 4*i};
std::ranges::swap(t1, t2);
return t1[0].i == 3*i && t2[0].i == i && t1[1].i == 4*i && t2[1].i == 2*i;
}
static_assert(check_array_without_adl_swap(1));
constexpr bool check_union_with_adl_swap(int i)
{
nu::U u1{}, u2{};
u1.i = u2.i = i;
std::ranges::swap(u1, u2);
return u1.i == 99 && u2.i == 99;
}
static_assert(check_union_with_adl_swap(1));
|
