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435e56fb | 1 | // { dg-options "-std=gnu++17" } |
47df7e19 | 2 | // { dg-do compile { target c++17 } } |
435e56fb | 3 | |
a5544970 | 4 | // Copyright (C) 2013-2019 Free Software Foundation, Inc. |
435e56fb VV |
5 | // |
6 | // This file is part of the GNU ISO C++ Library. This library is free | |
7 | // software; you can redistribute it and/or modify it under the | |
8 | // terms of the GNU General Public License as published by the | |
9 | // Free Software Foundation; either version 3, or (at your option) | |
10 | // any later version. | |
11 | ||
12 | // This library is distributed in the hope that it will be useful, | |
13 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | // GNU General Public License for more details. | |
16 | ||
c7cbb4da | 17 | // You should have received a copy of the GNU General Public License along |
435e56fb VV |
18 | // with this library; see the file COPYING3. If not see |
19 | // <http://www.gnu.org/licenses/>. | |
20 | ||
21 | #include <optional> | |
22 | #include <testsuite_hooks.h> | |
23 | ||
24 | namespace ns | |
25 | { | |
26 | struct value_type | |
27 | { | |
28 | int i; | |
29 | const char* s; | |
30 | }; | |
31 | ||
32 | constexpr bool | |
33 | strcmp(const char* lhs, const char* rhs) | |
34 | { | |
35 | return *lhs == *rhs && (!*lhs || strcmp(lhs + 1, rhs + 1)); | |
36 | } | |
37 | ||
38 | constexpr bool | |
39 | strrel(const char* lhs, const char* rhs) | |
40 | { | |
41 | return (*rhs && (!*lhs || (*lhs < *rhs))) | |
42 | || ((*lhs && *rhs && !(*rhs < *lhs)) && strrel(lhs + 1, rhs + 1)); | |
43 | } | |
44 | ||
45 | constexpr bool | |
46 | operator==(value_type const& lhs, value_type const& rhs) | |
47 | { return (lhs.i == rhs.i) && strcmp(lhs.s, rhs.s); } | |
48 | ||
49 | constexpr bool | |
50 | operator!=(value_type const& lhs, value_type const& rhs) | |
51 | { return !(lhs == rhs); } | |
52 | ||
53 | constexpr bool | |
54 | operator<(value_type const& lhs, value_type const& rhs) | |
55 | { return (lhs.i < rhs.i) || (!(rhs.i < lhs.i) && strrel(lhs.s, rhs.s)); } | |
56 | ||
57 | } // namespace ns | |
58 | ||
59 | int main() | |
60 | { | |
61 | using ns::value_type; | |
62 | using O = std::optional<value_type>; | |
63 | ||
64 | { | |
65 | constexpr O o, p; | |
66 | static_assert( o == p, "" ); | |
67 | static_assert( !(o != p), "" ); | |
68 | } | |
69 | ||
70 | { | |
71 | constexpr O o { value_type { 42, "forty-two" } }, p; | |
72 | static_assert( !(o == p), "" ); | |
73 | static_assert( o != p, "" ); | |
74 | } | |
75 | ||
76 | { | |
77 | constexpr O o, p { value_type { 42, "forty-two" } }; | |
78 | static_assert( !(o == p), "" ); | |
79 | static_assert( o != p, "" ); | |
80 | } | |
81 | ||
82 | { | |
83 | constexpr O o { value_type { 11, "eleventy" } }, p { value_type { 42, "forty-two" } }; | |
84 | static_assert( !(o == p), "" ); | |
85 | static_assert( o != p, "" ); | |
86 | } | |
87 | ||
88 | { | |
89 | constexpr O o { value_type { 42, "forty-two" } }, p { value_type { 11, "eleventy" } }; | |
90 | static_assert( !(o == p), "" ); | |
91 | static_assert( o != p, "" ); | |
92 | } | |
93 | ||
94 | { | |
95 | constexpr O o { value_type { 42, "forty-two" } }, p { value_type { 42, "forty-two" } }; | |
96 | static_assert( o == p, "" ); | |
97 | static_assert( !(o != p), "" ); | |
98 | } | |
99 | } |