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83ffe9cd | 1 | // Copyright (C) 2019-2023 Free Software Foundation, Inc. |
0cb78ef4 JW |
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 | ||
0cb78ef4 JW |
18 | // { dg-do run { target c++17 } } |
19 | ||
20 | #include <string> | |
21 | #include <memory_resource> | |
22 | #include <testsuite_hooks.h> | |
b370ed0b | 23 | #include <testsuite_allocator.h> |
0cb78ef4 JW |
24 | |
25 | // C++17 24.3.5 [basic.string.hash] | |
26 | // If S is one of these string types, SV is the corresponding string view type, | |
27 | // and s is an object of type S, then hash<S>()(s) == hash<SV>()(SV(s)). | |
28 | ||
29 | template<typename S> | |
30 | bool | |
31 | test(const S& s) | |
32 | { | |
33 | using std::hash; | |
34 | using SV = std::basic_string_view<typename S::value_type>; | |
35 | return hash<S>()(s) == hash<SV>()(SV(s)); | |
36 | } | |
37 | ||
38 | void | |
39 | test01() | |
40 | { | |
41 | VERIFY( test(std::string("a narrow string")) ); | |
0cb78ef4 | 42 | VERIFY( test(std::u16string(u"a utf-16 string")) ); |
0cb78ef4 | 43 | VERIFY( test(std::u32string(U"a utf-32 string")) ); |
0cb78ef4 | 44 | VERIFY( test(std::wstring(L"a wide string")) ); |
53e69273 JW |
45 | } |
46 | ||
47 | void | |
48 | test02() | |
49 | { | |
50 | #if _GLIBCXX_USE_CXX11_ABI | |
51 | VERIFY( test(std::pmr::string("a narrow string, but with PMR!")) ); | |
52 | VERIFY( test(std::pmr::u16string(u"a utf-16 string, but with PMR!")) ); | |
53 | VERIFY( test(std::pmr::u32string(U"a utf-32 string, but with PMR!")) ); | |
0cb78ef4 JW |
54 | VERIFY( test(std::pmr::wstring(L"a wide string, but with PMR!")) ); |
55 | #endif | |
56 | } | |
57 | ||
b370ed0b JW |
58 | template<typename C> |
59 | using String | |
60 | = std::basic_string<C, std::char_traits<C>, __gnu_test::SimpleAllocator<C>>; | |
61 | ||
62 | void | |
63 | test03() | |
64 | { | |
65 | // LWG 3705. Hashability shouldn't depend on basic_string's allocator | |
66 | VERIFY( test(String<char>("a narrow string")) ); | |
67 | VERIFY( test(String<char16_t>(u"a utf-16 string")) ); | |
68 | VERIFY( test(String<char32_t>(U"a utf-32 string")) ); | |
69 | VERIFY( test(String<wchar_t>(L"a wide string")) ); | |
70 | } | |
71 | ||
0cb78ef4 JW |
72 | int |
73 | main() | |
74 | { | |
75 | test01(); | |
53e69273 | 76 | test02(); |
b370ed0b | 77 | test03(); |
0cb78ef4 | 78 | } |