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
9 // UNSUPPORTED: c++03, c++11, c++14, c++17
10 // UNSUPPORTED: no-localization
11 // UNSUPPORTED: GCC-ALWAYS_INLINE-FIXME
12
13 // TODO FMT This test should not require std::to_chars(floating-point)
14 // XFAIL: availability-fp_to_chars-missing
15
16 // <chrono>
17
18 // class system_clock;
19
20 // template<class charT, class traits, class Duration>
21 // basic_ostream<charT, traits>&
22 // operator<<(basic_ostream<charT, traits>& os, const local_time<Duration>& tp);
23
24 // The function uses the system_clock which has two overloads
25
26 // template<class charT, class traits, class Duration>
27 // basic_ostream<charT, traits>&
28 // operator<<(basic_ostream<charT, traits>& os, const sys_time<Duration>& tp);
29 // Constraints: treat_as_floating_point_v<typename Duration::rep> is false, and Duration{1} < days{1} is true.
30
31 // template<class charT, class traits>
32 // basic_ostream<charT, traits>&
33 // operator<<(basic_ostream<charT, traits>& os, const sys_days& dp);
34
35 // Note local_time's operator<< is specified a
36 // Effects: os << sys_time<Duration>{lt.time_since_epoch()};
37 // since it uses Effects and not Effects: Equivalent to the constrains of
38 // sys_time do not apply to this operator. This means it's not possible to use
39 // a SFINAE test.
40
41 #include <chrono>
42 #include <ratio>
43 #include <sstream>
44 #include <type_traits>
45
test()46 void test() {
47 std::stringstream sstr;
48
49 // floating-point values
50
51 sstr << // expected-error@*:* {{invalid operands to binary expression}}
52 std::chrono::local_time<std::chrono::duration<float, std::ratio<1, 1>>>{
53 std::chrono::duration<float, std::ratio<1, 1>>{0}};
54
55 sstr << // expected-error@*:* {{invalid operands to binary expression}}
56 std::chrono::local_time<std::chrono::duration<double, std::ratio<1, 1>>>{
57 std::chrono::duration<double, std::ratio<1, 1>>{0}};
58
59 sstr << // expected-error@*:* {{invalid operands to binary expression}}
60 std::chrono::local_time<std::chrono::duration<long double, std::ratio<1, 1>>>{
61 std::chrono::duration<long double, std::ratio<1, 1>>{0}};
62
63 // duration >= day
64
65 sstr << // valid since day has its own formatter
66 std::chrono::local_days{std::chrono::days{0}};
67
68 using rep = std::conditional_t<std::is_same_v<std::chrono::days::rep, int>, long, int>;
69 sstr << // a different rep does not matter,
70 std::chrono::local_time<std::chrono::duration<rep, std::ratio<86400>>>{
71 std::chrono::duration<rep, std::ratio<86400>>{0}};
72
73 sstr << // expected-error@*:* {{invalid operands to binary expression}}
74 std::chrono::local_time<std::chrono::duration<typename std::chrono::days::rep, std::ratio<86401>>>{
75 std::chrono::duration<typename std::chrono::days::rep, std::ratio<86401>>{0}};
76
77 sstr << // These are considered days.
78 std::chrono::local_time<std::chrono::weeks>{std::chrono::weeks{3}};
79
80 sstr << // These too.
81 std::chrono::local_time<std::chrono::duration<rep, std::ratio<20 * 86400>>>{
82 std::chrono::duration<rep, std::ratio<20 * 86400>>{0}};
83
84 sstr << // expected-error@*:* {{invalid operands to binary expression}}
85 std::chrono::local_time<std::chrono::months>{std::chrono::months{0}};
86
87 sstr << // expected-error@*:* {{invalid operands to binary expression}}
88 std::chrono::local_time<std::chrono::years>{std::chrono::years{0}};
89 }
90