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83ffe9cd | 1 | // Copyright (C) 2019-2023 Free Software Foundation, Inc. |
328b52d6 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 <ranges> | |
22 | #include <testsuite_iterators.h> | |
23 | ||
24 | static_assert( std::ranges::sized_range<int(&)[1]> ); | |
25 | static_assert( std::ranges::sized_range<const int(&)[1]> ); | |
26 | static_assert( std::ranges::sized_range<int[1]> ); | |
27 | static_assert( !std::ranges::sized_range<int*> ); | |
28 | ||
29 | using namespace __gnu_test; | |
30 | ||
31 | // ranges::size(r) uses (end(r) - begin(r)) | |
32 | static_assert( std::ranges::sized_range<test_contiguous_range<int>> ); | |
33 | static_assert( std::ranges::sized_range<test_contiguous_range<int>&> ); | |
34 | static_assert( std::ranges::sized_range<test_random_access_range<int>> ); | |
35 | static_assert( std::ranges::sized_range<test_random_access_range<int>&> ); | |
36 | // ranges::size(r) is invalid, (end(r) - begin(r)) requires sized sentinel | |
37 | static_assert(!std::ranges::sized_range<test_bidirectional_range<int>> ); | |
38 | static_assert(!std::ranges::sized_range<test_bidirectional_range<int>&> ); | |
39 | static_assert(!std::ranges::sized_range<test_forward_range<int>> ); | |
40 | static_assert(!std::ranges::sized_range<test_forward_range<int>&> ); | |
41 | static_assert(!std::ranges::sized_range<test_input_range<int>> ); | |
42 | static_assert(!std::ranges::sized_range<test_input_range<int>&> ); | |
43 | static_assert(!std::ranges::sized_range<test_output_range<int>> ); | |
44 | static_assert(!std::ranges::sized_range<test_output_range<int>&> ); | |
45 | ||
46 | // ranges::size(r) uses r.size() | |
47 | static_assert( std::ranges::sized_range<test_contiguous_sized_range<int>> ); | |
48 | static_assert( std::ranges::sized_range<test_contiguous_sized_range<int>&> ); | |
49 | static_assert( std::ranges::sized_range<test_random_access_sized_range<int>> ); | |
50 | static_assert( std::ranges::sized_range<test_random_access_sized_range<int>&> ); | |
51 | static_assert( std::ranges::sized_range<test_bidirectional_sized_range<int>> ); | |
52 | static_assert( std::ranges::sized_range<test_bidirectional_sized_range<int>&> ); | |
53 | static_assert( std::ranges::sized_range<test_forward_sized_range<int>> ); | |
54 | static_assert( std::ranges::sized_range<test_forward_sized_range<int>&> ); | |
55 | static_assert( std::ranges::sized_range<test_input_sized_range<int>> ); | |
56 | static_assert( std::ranges::sized_range<test_input_sized_range<int>&> ); | |
57 | static_assert( std::ranges::sized_range<test_output_sized_range<int>> ); | |
58 | static_assert( std::ranges::sized_range<test_output_sized_range<int>&> ); | |
59 | ||
60 | using long_range = __gnu_test::test_random_access_sized_range<long>; | |
61 | template<> constexpr bool std::ranges::disable_sized_range<long_range> = true; | |
62 | ||
63 | // Despite being disabled, this is still a sized_range because ranges::size(r) | |
64 | // works, by using (ranges::end(r) - ranges::begin(r)). | |
65 | static_assert( std::ranges::sized_range<long_range> ); | |
66 | static_assert( std::ranges::sized_range<long_range&> ); | |
67 | ||
68 | using short_range = __gnu_test::test_bidirectional_sized_range<short>; | |
69 | template<> constexpr bool std::ranges::disable_sized_range<short_range> = true; | |
70 | ||
71 | // This is not a sized range because ranges::size(r) cannot use member size, | |
72 | // or ADL size, and (ranges::end(r) - ranges::begin(r)) is ill-formed for | |
73 | // bidirectional iterators. | |
74 | static_assert( !std::ranges::sized_range<short_range> ); | |
75 | static_assert( !std::ranges::sized_range<short_range&> ); |