1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 // UNSUPPORTED: c++03, c++11, c++14, c++17
9
10 // <chrono>
11
12 // struct local_t {};
13 // template<class Duration>
14 // using local_time = time_point<system_clock, Duration>;
15 // using local_seconds = sys_time<seconds>;
16 // using local_days = sys_time<days>;
17
18 // [Example:
19 // sys_seconds{sys_days{1970y/January/1}}.time_since_epoch() is 0s.
20 // sys_seconds{sys_days{2000y/January/1}}.time_since_epoch() is 946’684’800s, which is 10’957 * 86’400s.
21 // —end example]
22
23
24 #include <chrono>
25 #include <cassert>
26
27 #include "test_macros.h"
28
main(int,char **)29 int main(int, char**)
30 {
31 using local_t = std::chrono::local_t;
32 using year = std::chrono::year;
33
34 using seconds = std::chrono::seconds;
35 using minutes = std::chrono::minutes;
36 using days = std::chrono::days;
37
38 using local_seconds = std::chrono::local_seconds;
39 using local_minutes = std::chrono::local_time<minutes>;
40 using local_days = std::chrono::local_days;
41
42 constexpr std::chrono::month January = std::chrono::January;
43
44 ASSERT_SAME_TYPE(std::chrono::local_time<seconds>, local_seconds);
45 ASSERT_SAME_TYPE(std::chrono::local_time<days>, local_days);
46
47 // Test the long form, too
48 ASSERT_SAME_TYPE(std::chrono::time_point<local_t, seconds>, local_seconds);
49 ASSERT_SAME_TYPE(std::chrono::time_point<local_t, minutes>, local_minutes);
50 ASSERT_SAME_TYPE(std::chrono::time_point<local_t, days>, local_days);
51
52 // Test some well known values
53 local_days d0 = local_days{year{1970}/January/1};
54 local_days d1 = local_days{year{2000}/January/1};
55 ASSERT_SAME_TYPE(decltype(d0.time_since_epoch()), days);
56 assert( d0.time_since_epoch().count() == 0);
57 assert( d1.time_since_epoch().count() == 10957);
58
59 local_seconds s0{d0};
60 local_seconds s1{d1};
61 ASSERT_SAME_TYPE(decltype(s0.time_since_epoch()), seconds);
62 assert( s0.time_since_epoch().count() == 0);
63 assert( s1.time_since_epoch().count() == 946684800L);
64
65 return 0;
66 }
67