]>
Commit | Line | Data |
---|---|---|
7adcbafe | 1 | // Copyright (C) 2020-2022 Free Software Foundation, Inc. |
389cd88c 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 compile { target c++2a } } | |
20 | ||
21 | #include <span> | |
22 | ||
23 | template<typename T, int N, typename U> | |
24 | constexpr bool is_static_span(const U&) | |
25 | { | |
26 | return std::is_same_v<std::span<T, N>, U> && N != std::dynamic_extent; | |
27 | } | |
28 | ||
29 | template<typename T, typename U> | |
30 | constexpr bool is_dynamic_span(const U&) | |
31 | { | |
32 | return std::is_same_v<std::span<T>, U>; | |
33 | } | |
34 | ||
35 | struct Range | |
36 | { | |
37 | float* begin() const; | |
38 | float* end() const; | |
39 | }; | |
40 | ||
41 | void | |
42 | test01() | |
43 | { | |
44 | const char c[] = ""; | |
45 | int i[2]{}; | |
46 | std::array<long, 3> a; | |
47 | Range r; | |
48 | ||
49 | std::span s1(c); | |
50 | static_assert( is_static_span<const char, 1>(s1) ); | |
51 | ||
52 | std::span s2(i); | |
53 | static_assert( is_static_span<int, 2>(s2) ); | |
54 | ||
55 | std::span s3(a); | |
56 | static_assert( is_static_span<long, 3>(s3) ); | |
57 | ||
58 | std::span s4(const_cast<const std::array<long, 3>&>(a)); | |
59 | static_assert( is_static_span<const long, 3>(s4) ); | |
60 | ||
61 | std::span s5(std::begin(i), std::end(i)); | |
62 | static_assert( is_dynamic_span<int>(s5) ); | |
63 | ||
64 | std::span s6(std::cbegin(i), std::cend(i)); | |
65 | static_assert( is_dynamic_span<const int>(s6) ); | |
66 | ||
67 | std::span s7(r); | |
68 | static_assert( is_dynamic_span<float>(s7) ); | |
69 | ||
70 | std::span s8(s1); | |
71 | static_assert( is_static_span<const char, 1>(s8) ); | |
72 | ||
73 | std::span s9(s2); | |
74 | static_assert( is_static_span<int, 2>(s9) ); | |
75 | ||
66ae31eb | 76 | std::span s10(const_cast<const std::span<int, 2>&>(s2)); |
389cd88c JW |
77 | static_assert( is_static_span<int, 2>(s10) ); |
78 | ||
79 | std::span s11(s5); | |
80 | static_assert( is_dynamic_span<int>(s11) ); | |
81 | ||
82 | std::span s12(const_cast<const std::span<int>&>(s5)); | |
83 | static_assert( is_dynamic_span<int>(s12) ); | |
84 | } |