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41cd9d4d | 1 | // { dg-do compile { target c++20 } } |
03d5044b | 2 | |
a945c346 | 3 | // Copyright (C) 2020-2024 Free Software Foundation, Inc. |
03d5044b PP |
4 | // |
5 | // This file is part of the GNU ISO C++ Library. This library is free | |
6 | // software; you can redistribute it and/or modify it under the | |
7 | // terms of the GNU General Public License as published by the | |
8 | // Free Software Foundation; either version 3, or (at your option) | |
9 | // any later version. | |
10 | ||
11 | // This library is distributed in the hope that it will be useful, | |
12 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | // GNU General Public License for more details. | |
15 | ||
16 | // You should have received a copy of the GNU General Public License along | |
17 | // with this library; see the file COPYING3. If not see | |
18 | // <http://www.gnu.org/licenses/>. | |
19 | ||
20 | // Class template day [time.cal.weekday] | |
21 | ||
22 | #include <chrono> | |
f6ce081d | 23 | #include <limits> |
03d5044b PP |
24 | |
25 | constexpr void | |
26 | constexpr_weekday() | |
27 | { | |
28 | using namespace std::chrono; | |
29 | ||
30 | weekday dwd{}; | |
31 | ++dwd; | |
32 | dwd++; | |
33 | --dwd; | |
34 | dwd--; | |
35 | dwd += days{3}; | |
36 | dwd -= days{3}; | |
37 | ||
38 | static_assert(weekday{3}[2].weekday() == weekday{3}); | |
39 | static_assert(weekday{3}[last].weekday() == weekday{3}); | |
40 | ||
f6ce081d CN |
41 | // Test for UB (overflow). |
42 | { | |
43 | using rep = days::rep; | |
44 | using std::numeric_limits; | |
45 | constexpr weekday max{sys_days{days{numeric_limits<rep>::max()}}}; | |
46 | constexpr weekday min{sys_days{days{numeric_limits<rep>::min()}}}; | |
47 | } | |
48 | ||
03d5044b PP |
49 | static_assert(weekday{sys_days{1900y/January/1}} == Monday); |
50 | static_assert(weekday{sys_days{1970y/January/1}} == Thursday); | |
51 | static_assert(weekday{sys_days{2020y/August/21}} == Friday); | |
52 | ||
53 | static_assert(weekday{local_days{1900y/January/1}} == Monday); | |
54 | static_assert(weekday{local_days{1970y/January/1}} == Thursday); | |
55 | static_assert(weekday{local_days{2020y/August/21}} == Friday); | |
56 | ||
57 | static_assert(++weekday{3} == weekday{4}); | |
58 | static_assert(weekday{3}++ == weekday{3}); | |
59 | static_assert(--weekday{3} == weekday{2}); | |
60 | static_assert(weekday{3}-- == weekday{3}); | |
61 | static_assert((weekday{3} += days{3}) == weekday{6}); | |
62 | static_assert((weekday{3} -= days{3}) == weekday{0}); | |
63 | ||
64 | static_assert(Monday + days{7000} == Monday); | |
65 | static_assert(Monday + days{-7000} == Monday); | |
66 | static_assert(days{7001} + Monday == Tuesday); | |
67 | static_assert(days{-7001} + Monday == Sunday); | |
68 | static_assert(Monday - days{7000} == Monday); | |
69 | static_assert(Monday - days{-7000} == Monday); | |
70 | static_assert(Monday - days{7001} == Sunday); | |
71 | ||
72 | static_assert([] { | |
73 | constexpr unsigned diff_tbl[7][7] | |
74 | = { { 0, 6, 5, 4, 3, 2, 1}, | |
75 | { 1, 0, 6, 5, 4, 3, 2}, | |
76 | { 2, 1, 0, 6, 5, 4, 3}, | |
77 | { 3, 2, 1, 0, 6, 5, 4}, | |
78 | { 4, 3, 2, 1, 0, 6, 5}, | |
79 | { 5, 4, 3, 2, 1, 0, 6}, | |
80 | { 6, 5, 4, 3, 2, 1, 0} }; | |
81 | for (unsigned x = 0; x < 7; x++) | |
82 | for (unsigned y = 0; y < 7; y++) | |
83 | { | |
84 | if (weekday{x} - weekday{y} != days{diff_tbl[x][y]}) | |
85 | return false; | |
86 | if (weekday{x} - days{diff_tbl[x][y]} != weekday{y}) | |
87 | return false; | |
88 | if (weekday{x} != weekday{y} + days{diff_tbl[x][y]}) | |
89 | return false; | |
90 | if (weekday{x} != days{diff_tbl[x][y]} + weekday{y}) | |
91 | return false; | |
92 | } | |
93 | return true; | |
94 | }()); | |
95 | ||
96 | static_assert(Sunday.c_encoding() == 0); | |
97 | static_assert(Sunday.iso_encoding() == 7); | |
98 | static_assert(Monday.c_encoding() == 1); | |
99 | static_assert(Monday.iso_encoding() == 1); | |
100 | ||
101 | static_assert(!weekday{127}.ok()); | |
102 | static_assert(weekday{0}.ok()); | |
103 | static_assert(weekday{6}.ok()); | |
104 | static_assert(weekday{7}.ok()); // Ctor wraps 7 to 0. | |
105 | static_assert(!weekday{8}.ok()); | |
106 | ||
107 | static_assert(weekday{7} == weekday{0}); | |
108 | static_assert(!(weekday{0} == weekday{1})); | |
109 | static_assert( (weekday{0} != weekday{2})); | |
110 | } |