1 // Copyright (C) 2020-2021 Free Software Foundation, Inc.
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 <chrono>
22 
23 #ifndef __cpp_lib_chrono
24 # error "Feature test macro for chrono is missing in <chrono>"
25 // FIXME
26 // #elif __cpp_lib_chrono < 201907L
27 // # error "Feature test macro for chrono has wrong value in <chrono>"
28 #endif
29 
30 namespace __gnu_test
31 {
32   // Check for the new additions to <chrono> in C++20
33 
34   using std::chrono::is_clock;
35   using std::chrono::is_clock_v;
36 
37   using std::chrono::days;
38   using std::chrono::weeks;
39   using std::chrono::years;
40   using std::chrono::months;
41 
42   using std::chrono::sys_time;
43   using std::chrono::sys_seconds;
44   using std::chrono::sys_days;
45 
46   // FIXME
47 #if 0
48   using std::chrono::utc_clock;
49   using std::chrono::utc_time;
50   using std::chrono::utc_seconds;
51 
52   using std::chrono::leap_second_info;
53   using std::chrono::get_leap_second_info;
54 
55   using std::chrono::tai_clock;
56   using std::chrono::tai_time;
57   using std::chrono::tai_seconds;
58 
59   using std::chrono::gps_clock;
60   using std::chrono::gps_time;
61   using std::chrono::gps_seconds;
62 #endif
63 
64   using std::chrono::file_clock;
65   using std::chrono::file_time;
66 
67   using std::chrono::local_t;
68   using std::chrono::local_time;
69   using std::chrono::local_seconds;
70   using std::chrono::local_days;
71 
72   // FIXME
73 #if 0
74   using std::chrono::clock_time_conversion;
75   using std::chrono::clock_cast;
76 
77   using std::chrono::last_spec;
78 #endif
79 
80   using std::chrono::day;
81   using std::chrono::month;
82   using std::chrono::year;
83   using std::chrono::weekday;
84   using std::chrono::weekday_indexed;
85   using std::chrono::weekday_last;
86   using std::chrono::month_day;
87   using std::chrono::month_day_last;
88   using std::chrono::month_weekday;
89   using std::chrono::month_weekday_last;
90   using std::chrono::year_month;
91   using std::chrono::year_month_day;
92   using std::chrono::year_month_day_last;
93   using std::chrono::year_month_weekday;
94   using std::chrono::year_month_weekday_last;
95   using std::chrono::year_month;
96   using std::chrono::year_month_day;
97 
98   using std::chrono::hh_mm_ss;
99   using std::chrono::is_am;
100   using std::chrono::is_pm;
101   using std::chrono::make12;
102   using std::chrono::make24;
103 
104   // FIXME
105 #if 0
106   using std::chrono::tzdb;
107   using std::chrono::tzdb_list;
108   using std::chrono::get_tzdb;
109   using std::chrono::get_tzdb_list;
110   using std::chrono::locate_zone;
111   using std::chrono::current_zone;
112 
113   using std::chrono::reload_tzdb;
114   using std::chrono::remote_version;
115 
116   using std::chrono::nonexistent_local_time;
117   using std::chrono::ambiguous_local_time;
118 
119   using std::chrono::sys_info;
120   using std::chrono::local_info;
121 
122   using std::chrono::choose;
123   using std::chrono::time_zone;
124 
125   using std::chrono::zoned_traits;
126   using std::chrono::zoned_time;
127   using std::chrono::zoned_seconds;
128 
129   using std::chrono::leap_second;
130 
131   using std::chrono::time_zone_link;
132 
133   using std::chrono::local_time_format;
134 
135   using std::chrono::parse;
136 #endif
137 
138   using std::chrono::last;
139   using std::chrono::Sunday;
140   using std::chrono::Monday;
141   using std::chrono::Tuesday;
142   using std::chrono::Wednesday;
143   using std::chrono::Thursday;
144   using std::chrono::Friday;
145   using std::chrono::Saturday;
146 
147   using std::chrono::January;
148   using std::chrono::February;
149   using std::chrono::March;
150   using std::chrono::April;
151   using std::chrono::May;
152   using std::chrono::June;
153   using std::chrono::July;
154   using std::chrono::August;
155   using std::chrono::September;
156   using std::chrono::October;
157   using std::chrono::November;
158   using std::chrono::December;
159 
160   using std::chrono_literals::operator""d;
161   using std::chrono_literals::operator""y;
162 
163   template<typename>
164     constexpr bool is_duration = false;
165   template<typename R, typename P>
166     constexpr bool is_duration<std::chrono::duration<R, P>> = true;
167 
168   static_assert( is_duration<days> );
169   static_assert( is_duration<weeks> );
170   static_assert( is_duration<years> );
171   static_assert( is_duration<months> );
172 
173   template<typename D, typename P>
174     constexpr bool has_period = std::is_same_v<typename D::period, P>;
175 
176   using std::ratio;
177   using std::ratio_multiply;
178   using std::ratio_divide;
179   using std::chrono::hours;
180   static_assert( has_period<days, ratio_multiply<ratio<24>, hours::period>> );
181   static_assert( has_period<weeks, ratio_multiply<ratio<7>, days::period>> );
182   static_assert( has_period<years,
183 			    ratio_multiply<ratio<146097, 400>, days::period>> );
184   static_assert( has_period<months, ratio_divide<years::period, ratio<12>>> );
185 
186   template<typename>
187     constexpr bool is_time_point = false;
188   template<typename C, typename D>
189     constexpr bool is_time_point<std::chrono::time_point<C, D>> = true;
190 
191   static_assert( is_time_point<sys_time<std::chrono::milliseconds>> );
192   static_assert( is_time_point<sys_seconds> );
193   static_assert( is_time_point<sys_days> );
194 
195   static_assert( std::is_class_v<local_t> );
196   static_assert( is_time_point<local_time<std::chrono::milliseconds>> );
197   static_assert( is_time_point<local_seconds> );
198   static_assert( is_time_point<local_days> );
199 
200   static_assert( std::is_class_v<file_clock> );
201   static_assert( is_time_point<file_time<std::chrono::milliseconds>> );
202 }
203