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1 | // Copyright (C) 2019-2020 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 <functional> | |
22 | #include <testsuite_hooks.h> | |
23 | ||
24 | // C++20 [range.cmp] | |
25 | ||
26 | using F = std::ranges::equal_to; | |
27 | static_assert( std::is_default_constructible_v<F> ); | |
28 | static_assert( std::is_copy_constructible_v<F> ); | |
29 | static_assert( std::is_move_constructible_v<F> ); | |
30 | static_assert( std::is_copy_assignable_v<F> ); | |
31 | static_assert( std::is_move_assignable_v<F> ); | |
32 | ||
33 | static_assert( ! std::is_invocable_v<F> ); | |
34 | static_assert( ! std::is_invocable_v<F, int&> ); | |
35 | static_assert( ! std::is_invocable_v<F, int, void> ); | |
36 | static_assert( ! std::is_invocable_v<F, int, void*> ); | |
37 | static_assert( std::is_nothrow_invocable_r_v<bool, F&, int&, int> ); | |
38 | static_assert( std::is_nothrow_invocable_r_v<bool, F, const long&, char> ); | |
39 | static_assert( std::is_nothrow_invocable_r_v<bool, const F&, short, int&> ); | |
40 | static_assert( std::is_nothrow_invocable_r_v<bool, const F, const char, char> ); | |
41 | ||
42 | using T = F::is_transparent; // required typedef | |
43 | ||
44 | static_assert( std::ranges::equal_to{}(99, 99.0) ); | |
45 | static_assert( ! std::ranges::equal_to{}(99, 99.01) ); | |
46 | static_assert( ! std::ranges::equal_to{}(99, 140L) ); | |
47 | ||
48 | void | |
49 | test01() | |
50 | { | |
51 | F f; | |
52 | int a[2]{}; | |
53 | VERIFY( f(&a, (void*)&a[0]) ); | |
54 | VERIFY( ! f(&a, (void*)&a[1]) ); | |
55 | VERIFY( f(&a + 1, (void*)(a + 2)) ); | |
56 | } | |
57 | ||
58 | struct X { }; | |
59 | int operator==(X, X) noexcept { return 2; } | |
60 | int operator!=(X, X) { return 0; } | |
61 | ||
62 | static_assert( std::is_nothrow_invocable_r_v<bool, F&, X, X> ); | |
63 | ||
64 | void | |
65 | test02() | |
66 | { | |
67 | X x; | |
68 | F f; | |
69 | VERIFY( f(x, x) ); | |
70 | } | |
71 | ||
72 | int | |
73 | main() | |
74 | { | |
75 | test01(); | |
76 | test02(); | |
77 | } |