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7adcbafe | 1 | // Copyright (C) 2019-2022 Free Software Foundation, Inc. |
6d0dff49 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 | ||
18 | // { dg-options "-std=gnu++2a" } | |
19 | // { dg-do run { target c++2a } } | |
20 | ||
328b52d6 | 21 | #include <ranges> |
6d0dff49 | 22 | #include <testsuite_hooks.h> |
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23 | #include <testsuite_iterators.h> |
24 | ||
25 | static_assert(__gnu_test::is_customization_point_object(std::ranges::cdata)); | |
6d0dff49 | 26 | |
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27 | template<typename T> |
28 | concept has_cdata | |
29 | = requires (T&& t) { std::ranges::cdata(std::forward<T>(t)); }; | |
30 | ||
6d0dff49 JW |
31 | void |
32 | test01() | |
33 | { | |
34 | struct R | |
35 | { | |
36 | int i = 0; | |
37 | int j = 0; | |
38 | int* data() { return &j; } | |
39 | const R* data() const noexcept { return nullptr; } | |
40 | }; | |
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41 | static_assert( has_cdata<R&> ); |
42 | static_assert( has_cdata<const R&> ); | |
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43 | R r; |
44 | const R& c = r; | |
45 | VERIFY( std::ranges::cdata(r) == (R*)nullptr ); | |
46 | static_assert( noexcept(std::ranges::cdata(r)) ); | |
47 | VERIFY( std::ranges::cdata(c) == (R*)nullptr ); | |
48 | static_assert( noexcept(std::ranges::cdata(c)) ); | |
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49 | |
50 | // not lvalues and not borrowed ranges | |
51 | static_assert( !has_cdata<R> ); | |
52 | static_assert( !has_cdata<const R> ); | |
6d0dff49 JW |
53 | } |
54 | ||
55 | void | |
56 | test02() | |
57 | { | |
58 | int a[] = { 0, 1 }; | |
59 | VERIFY( std::ranges::cdata(a) == a + 0 ); | |
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60 | |
61 | static_assert( has_cdata<int(&)[2]> ); | |
62 | static_assert( !has_cdata<int(&&)[2]> ); | |
6d0dff49 JW |
63 | } |
64 | ||
ee9548b3 | 65 | struct R3 |
6d0dff49 | 66 | { |
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67 | static inline int i = 0; |
68 | static inline long l = 0; | |
6d0dff49 | 69 | |
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70 | int* data() &; // this function is not defined |
71 | friend long* begin(R3&& r); // not defined | |
72 | friend const long* begin(const R3& r) { return &r.l; } | |
73 | friend const short* begin(const R3&&); // not defined | |
6d0dff49 JW |
74 | }; |
75 | ||
ee9548b3 | 76 | template<> constexpr bool std::ranges::enable_borrowed_range<R3> = true; |
b5b2e387 | 77 | |
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78 | void |
79 | test03() | |
80 | { | |
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81 | static_assert( has_cdata<R3&> ); |
82 | static_assert( has_cdata<R3> ); // borrowed range | |
83 | static_assert( has_cdata<const R3&> ); | |
84 | static_assert( has_cdata<const R3> ); // borrowed range | |
85 | ||
86 | R3 r; | |
87 | const R3& c = r; | |
b5b2e387 | 88 | VERIFY( std::ranges::cdata(r) == std::ranges::data(c) ); |
ee9548b3 | 89 | VERIFY( std::ranges::cdata(std::move(r)) == std::ranges::data(c) ); |
b5b2e387 | 90 | VERIFY( std::ranges::cdata(std::move(c)) == std::ranges::begin(c) ); |
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91 | } |
92 | ||
93 | int | |
94 | main() | |
95 | { | |
96 | test01(); | |
97 | test02(); | |
98 | test03(); | |
99 | } |