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comparison dep/toml11/toml/datetime.hpp @ 318:3b355fa948c7

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config: use TOML instead of INI unfortunately, INI is not enough, and causes some paths including semicolons to break with our current storage of the library folders. so, I decided to switch to TOML which does support real arrays...
author Paper <paper@paper.us.eu.org>
date Wed, 12 Jun 2024 05:25:41 -0400
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317:b1f4d1867ab1 318:3b355fa948c7
1 // Copyright Toru Niina 2017.
2 // Distributed under the MIT License.
3 #ifndef TOML11_DATETIME_HPP
4 #define TOML11_DATETIME_HPP
5 #include <cstdint>
6 #include <cstdlib>
7 #include <ctime>
8
9 #include <array>
10 #include <chrono>
11 #include <iomanip>
12 #include <ostream>
13 #include <tuple>
14
15 namespace toml
16 {
17
18 // To avoid non-threadsafe std::localtime. In C11 (not C++11!), localtime_s is
19 // provided in the absolutely same purpose, but C++11 is actually not compatible
20 // with C11. We need to dispatch the function depending on the OS.
21 namespace detail
22 {
23 // TODO: find more sophisticated way to handle this
24 #if defined(_MSC_VER)
25 inline std::tm localtime_s(const std::time_t* src)
26 {
27 std::tm dst;
28 const auto result = ::localtime_s(&dst, src);
29 if (result) { throw std::runtime_error("localtime_s failed."); }
30 return dst;
31 }
32 inline std::tm gmtime_s(const std::time_t* src)
33 {
34 std::tm dst;
35 const auto result = ::gmtime_s(&dst, src);
36 if (result) { throw std::runtime_error("gmtime_s failed."); }
37 return dst;
38 }
39 #elif (defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE >= 1) || defined(_XOPEN_SOURCE) || defined(_BSD_SOURCE) || defined(_SVID_SOURCE) || defined(_POSIX_SOURCE)
40 inline std::tm localtime_s(const std::time_t* src)
41 {
42 std::tm dst;
43 const auto result = ::localtime_r(src, &dst);
44 if (!result) { throw std::runtime_error("localtime_r failed."); }
45 return dst;
46 }
47 inline std::tm gmtime_s(const std::time_t* src)
48 {
49 std::tm dst;
50 const auto result = ::gmtime_r(src, &dst);
51 if (!result) { throw std::runtime_error("gmtime_r failed."); }
52 return dst;
53 }
54 #else // fallback. not threadsafe
55 inline std::tm localtime_s(const std::time_t* src)
56 {
57 const auto result = std::localtime(src);
58 if (!result) { throw std::runtime_error("localtime failed."); }
59 return *result;
60 }
61 inline std::tm gmtime_s(const std::time_t* src)
62 {
63 const auto result = std::gmtime(src);
64 if (!result) { throw std::runtime_error("gmtime failed."); }
65 return *result;
66 }
67 #endif
68 } // detail
69
70 enum class month_t : std::uint8_t
71 {
72 Jan = 0,
73 Feb = 1,
74 Mar = 2,
75 Apr = 3,
76 May = 4,
77 Jun = 5,
78 Jul = 6,
79 Aug = 7,
80 Sep = 8,
81 Oct = 9,
82 Nov = 10,
83 Dec = 11
84 };
85
86 struct local_date
87 {
88 std::int16_t year{}; // A.D. (like, 2018)
89 std::uint8_t month{}; // [0, 11]
90 std::uint8_t day{}; // [1, 31]
91
92 local_date(int y, month_t m, int d)
93 : year (static_cast<std::int16_t>(y)),
94 month(static_cast<std::uint8_t>(m)),
95 day (static_cast<std::uint8_t>(d))
96 {}
97
98 explicit local_date(const std::tm& t)
99 : year (static_cast<std::int16_t>(t.tm_year + 1900)),
100 month(static_cast<std::uint8_t>(t.tm_mon)),
101 day (static_cast<std::uint8_t>(t.tm_mday))
102 {}
103
104 explicit local_date(const std::chrono::system_clock::time_point& tp)
105 {
106 const auto t = std::chrono::system_clock::to_time_t(tp);
107 const auto time = detail::localtime_s(&t);
108 *this = local_date(time);
109 }
110
111 explicit local_date(const std::time_t t)
112 : local_date(std::chrono::system_clock::from_time_t(t))
113 {}
114
115 operator std::chrono::system_clock::time_point() const
116 {
117 // std::mktime returns date as local time zone. no conversion needed
118 std::tm t;
119 t.tm_sec = 0;
120 t.tm_min = 0;
121 t.tm_hour = 0;
122 t.tm_mday = static_cast<int>(this->day);
123 t.tm_mon = static_cast<int>(this->month);
124 t.tm_year = static_cast<int>(this->year) - 1900;
125 t.tm_wday = 0; // the value will be ignored
126 t.tm_yday = 0; // the value will be ignored
127 t.tm_isdst = -1;
128 return std::chrono::system_clock::from_time_t(std::mktime(&t));
129 }
130
131 operator std::time_t() const
132 {
133 return std::chrono::system_clock::to_time_t(
134 std::chrono::system_clock::time_point(*this));
135 }
136
137 local_date() = default;
138 ~local_date() = default;
139 local_date(local_date const&) = default;
140 local_date(local_date&&) = default;
141 local_date& operator=(local_date const&) = default;
142 local_date& operator=(local_date&&) = default;
143 };
144
145 inline bool operator==(const local_date& lhs, const local_date& rhs)
146 {
147 return std::make_tuple(lhs.year, lhs.month, lhs.day) ==
148 std::make_tuple(rhs.year, rhs.month, rhs.day);
149 }
150 inline bool operator!=(const local_date& lhs, const local_date& rhs)
151 {
152 return !(lhs == rhs);
153 }
154 inline bool operator< (const local_date& lhs, const local_date& rhs)
155 {
156 return std::make_tuple(lhs.year, lhs.month, lhs.day) <
157 std::make_tuple(rhs.year, rhs.month, rhs.day);
158 }
159 inline bool operator<=(const local_date& lhs, const local_date& rhs)
160 {
161 return (lhs < rhs) || (lhs == rhs);
162 }
163 inline bool operator> (const local_date& lhs, const local_date& rhs)
164 {
165 return !(lhs <= rhs);
166 }
167 inline bool operator>=(const local_date& lhs, const local_date& rhs)
168 {
169 return !(lhs < rhs);
170 }
171
172 template<typename charT, typename traits>
173 std::basic_ostream<charT, traits>&
174 operator<<(std::basic_ostream<charT, traits>& os, const local_date& date)
175 {
176 os << std::setfill('0') << std::setw(4) << static_cast<int>(date.year ) << '-';
177 os << std::setfill('0') << std::setw(2) << static_cast<int>(date.month) + 1 << '-';
178 os << std::setfill('0') << std::setw(2) << static_cast<int>(date.day ) ;
179 return os;
180 }
181
182 struct local_time
183 {
184 std::uint8_t hour{}; // [0, 23]
185 std::uint8_t minute{}; // [0, 59]
186 std::uint8_t second{}; // [0, 60]
187 std::uint16_t millisecond{}; // [0, 999]
188 std::uint16_t microsecond{}; // [0, 999]
189 std::uint16_t nanosecond{}; // [0, 999]
190
191 local_time(int h, int m, int s,
192 int ms = 0, int us = 0, int ns = 0)
193 : hour (static_cast<std::uint8_t>(h)),
194 minute(static_cast<std::uint8_t>(m)),
195 second(static_cast<std::uint8_t>(s)),
196 millisecond(static_cast<std::uint16_t>(ms)),
197 microsecond(static_cast<std::uint16_t>(us)),
198 nanosecond (static_cast<std::uint16_t>(ns))
199 {}
200
201 explicit local_time(const std::tm& t)
202 : hour (static_cast<std::uint8_t>(t.tm_hour)),
203 minute(static_cast<std::uint8_t>(t.tm_min)),
204 second(static_cast<std::uint8_t>(t.tm_sec)),
205 millisecond(0), microsecond(0), nanosecond(0)
206 {}
207
208 template<typename Rep, typename Period>
209 explicit local_time(const std::chrono::duration<Rep, Period>& t)
210 {
211 const auto h = std::chrono::duration_cast<std::chrono::hours>(t);
212 this->hour = static_cast<std::uint8_t>(h.count());
213 const auto t2 = t - h;
214 const auto m = std::chrono::duration_cast<std::chrono::minutes>(t2);
215 this->minute = static_cast<std::uint8_t>(m.count());
216 const auto t3 = t2 - m;
217 const auto s = std::chrono::duration_cast<std::chrono::seconds>(t3);
218 this->second = static_cast<std::uint8_t>(s.count());
219 const auto t4 = t3 - s;
220 const auto ms = std::chrono::duration_cast<std::chrono::milliseconds>(t4);
221 this->millisecond = static_cast<std::uint16_t>(ms.count());
222 const auto t5 = t4 - ms;
223 const auto us = std::chrono::duration_cast<std::chrono::microseconds>(t5);
224 this->microsecond = static_cast<std::uint16_t>(us.count());
225 const auto t6 = t5 - us;
226 const auto ns = std::chrono::duration_cast<std::chrono::nanoseconds>(t6);
227 this->nanosecond = static_cast<std::uint16_t>(ns.count());
228 }
229
230 operator std::chrono::nanoseconds() const
231 {
232 return std::chrono::nanoseconds (this->nanosecond) +
233 std::chrono::microseconds(this->microsecond) +
234 std::chrono::milliseconds(this->millisecond) +
235 std::chrono::seconds(this->second) +
236 std::chrono::minutes(this->minute) +
237 std::chrono::hours(this->hour);
238 }
239
240 local_time() = default;
241 ~local_time() = default;
242 local_time(local_time const&) = default;
243 local_time(local_time&&) = default;
244 local_time& operator=(local_time const&) = default;
245 local_time& operator=(local_time&&) = default;
246 };
247
248 inline bool operator==(const local_time& lhs, const local_time& rhs)
249 {
250 return std::make_tuple(lhs.hour, lhs.minute, lhs.second, lhs.millisecond, lhs.microsecond, lhs.nanosecond) ==
251 std::make_tuple(rhs.hour, rhs.minute, rhs.second, rhs.millisecond, rhs.microsecond, rhs.nanosecond);
252 }
253 inline bool operator!=(const local_time& lhs, const local_time& rhs)
254 {
255 return !(lhs == rhs);
256 }
257 inline bool operator< (const local_time& lhs, const local_time& rhs)
258 {
259 return std::make_tuple(lhs.hour, lhs.minute, lhs.second, lhs.millisecond, lhs.microsecond, lhs.nanosecond) <
260 std::make_tuple(rhs.hour, rhs.minute, rhs.second, rhs.millisecond, rhs.microsecond, rhs.nanosecond);
261 }
262 inline bool operator<=(const local_time& lhs, const local_time& rhs)
263 {
264 return (lhs < rhs) || (lhs == rhs);
265 }
266 inline bool operator> (const local_time& lhs, const local_time& rhs)
267 {
268 return !(lhs <= rhs);
269 }
270 inline bool operator>=(const local_time& lhs, const local_time& rhs)
271 {
272 return !(lhs < rhs);
273 }
274
275 template<typename charT, typename traits>
276 std::basic_ostream<charT, traits>&
277 operator<<(std::basic_ostream<charT, traits>& os, const local_time& time)
278 {
279 os << std::setfill('0') << std::setw(2) << static_cast<int>(time.hour ) << ':';
280 os << std::setfill('0') << std::setw(2) << static_cast<int>(time.minute) << ':';
281 os << std::setfill('0') << std::setw(2) << static_cast<int>(time.second);
282 if(time.millisecond != 0 || time.microsecond != 0 || time.nanosecond != 0)
283 {
284 os << '.';
285 os << std::setfill('0') << std::setw(3) << static_cast<int>(time.millisecond);
286 if(time.microsecond != 0 || time.nanosecond != 0)
287 {
288 os << std::setfill('0') << std::setw(3) << static_cast<int>(time.microsecond);
289 if(time.nanosecond != 0)
290 {
291 os << std::setfill('0') << std::setw(3) << static_cast<int>(time.nanosecond);
292 }
293 }
294 }
295 return os;
296 }
297
298 struct time_offset
299 {
300 std::int8_t hour{}; // [-12, 12]
301 std::int8_t minute{}; // [-59, 59]
302
303 time_offset(int h, int m)
304 : hour (static_cast<std::int8_t>(h)),
305 minute(static_cast<std::int8_t>(m))
306 {}
307
308 operator std::chrono::minutes() const
309 {
310 return std::chrono::minutes(this->minute) +
311 std::chrono::hours(this->hour);
312 }
313
314 time_offset() = default;
315 ~time_offset() = default;
316 time_offset(time_offset const&) = default;
317 time_offset(time_offset&&) = default;
318 time_offset& operator=(time_offset const&) = default;
319 time_offset& operator=(time_offset&&) = default;
320 };
321
322 inline bool operator==(const time_offset& lhs, const time_offset& rhs)
323 {
324 return std::make_tuple(lhs.hour, lhs.minute) ==
325 std::make_tuple(rhs.hour, rhs.minute);
326 }
327 inline bool operator!=(const time_offset& lhs, const time_offset& rhs)
328 {
329 return !(lhs == rhs);
330 }
331 inline bool operator< (const time_offset& lhs, const time_offset& rhs)
332 {
333 return std::make_tuple(lhs.hour, lhs.minute) <
334 std::make_tuple(rhs.hour, rhs.minute);
335 }
336 inline bool operator<=(const time_offset& lhs, const time_offset& rhs)
337 {
338 return (lhs < rhs) || (lhs == rhs);
339 }
340 inline bool operator> (const time_offset& lhs, const time_offset& rhs)
341 {
342 return !(lhs <= rhs);
343 }
344 inline bool operator>=(const time_offset& lhs, const time_offset& rhs)
345 {
346 return !(lhs < rhs);
347 }
348
349 template<typename charT, typename traits>
350 std::basic_ostream<charT, traits>&
351 operator<<(std::basic_ostream<charT, traits>& os, const time_offset& offset)
352 {
353 if(offset.hour == 0 && offset.minute == 0)
354 {
355 os << 'Z';
356 return os;
357 }
358 int minute = static_cast<int>(offset.hour) * 60 + offset.minute;
359 if(minute < 0){os << '-'; minute = std::abs(minute);} else {os << '+';}
360 os << std::setfill('0') << std::setw(2) << minute / 60 << ':';
361 os << std::setfill('0') << std::setw(2) << minute % 60;
362 return os;
363 }
364
365 struct local_datetime
366 {
367 local_date date{};
368 local_time time{};
369
370 local_datetime(local_date d, local_time t): date(d), time(t) {}
371
372 explicit local_datetime(const std::tm& t): date(t), time(t){}
373
374 explicit local_datetime(const std::chrono::system_clock::time_point& tp)
375 {
376 const auto t = std::chrono::system_clock::to_time_t(tp);
377 std::tm ltime = detail::localtime_s(&t);
378
379 this->date = local_date(ltime);
380 this->time = local_time(ltime);
381
382 // std::tm lacks subsecond information, so diff between tp and tm
383 // can be used to get millisecond & microsecond information.
384 const auto t_diff = tp -
385 std::chrono::system_clock::from_time_t(std::mktime(&ltime));
386 this->time.millisecond = static_cast<std::uint16_t>(
387 std::chrono::duration_cast<std::chrono::milliseconds>(t_diff).count());
388 this->time.microsecond = static_cast<std::uint16_t>(
389 std::chrono::duration_cast<std::chrono::microseconds>(t_diff).count());
390 this->time.nanosecond = static_cast<std::uint16_t>(
391 std::chrono::duration_cast<std::chrono::nanoseconds >(t_diff).count());
392 }
393
394 explicit local_datetime(const std::time_t t)
395 : local_datetime(std::chrono::system_clock::from_time_t(t))
396 {}
397
398 operator std::chrono::system_clock::time_point() const
399 {
400 using internal_duration =
401 typename std::chrono::system_clock::time_point::duration;
402
403 // Normally DST begins at A.M. 3 or 4. If we re-use conversion operator
404 // of local_date and local_time independently, the conversion fails if
405 // it is the day when DST begins or ends. Since local_date considers the
406 // time is 00:00 A.M. and local_time does not consider DST because it
407 // does not have any date information. We need to consider both date and
408 // time information at the same time to convert it correctly.
409
410 std::tm t;
411 t.tm_sec = static_cast<int>(this->time.second);
412 t.tm_min = static_cast<int>(this->time.minute);
413 t.tm_hour = static_cast<int>(this->time.hour);
414 t.tm_mday = static_cast<int>(this->date.day);
415 t.tm_mon = static_cast<int>(this->date.month);
416 t.tm_year = static_cast<int>(this->date.year) - 1900;
417 t.tm_wday = 0; // the value will be ignored
418 t.tm_yday = 0; // the value will be ignored
419 t.tm_isdst = -1;
420
421 // std::mktime returns date as local time zone. no conversion needed
422 auto dt = std::chrono::system_clock::from_time_t(std::mktime(&t));
423 dt += std::chrono::duration_cast<internal_duration>(
424 std::chrono::milliseconds(this->time.millisecond) +
425 std::chrono::microseconds(this->time.microsecond) +
426 std::chrono::nanoseconds (this->time.nanosecond));
427 return dt;
428 }
429
430 operator std::time_t() const
431 {
432 return std::chrono::system_clock::to_time_t(
433 std::chrono::system_clock::time_point(*this));
434 }
435
436 local_datetime() = default;
437 ~local_datetime() = default;
438 local_datetime(local_datetime const&) = default;
439 local_datetime(local_datetime&&) = default;
440 local_datetime& operator=(local_datetime const&) = default;
441 local_datetime& operator=(local_datetime&&) = default;
442 };
443
444 inline bool operator==(const local_datetime& lhs, const local_datetime& rhs)
445 {
446 return std::make_tuple(lhs.date, lhs.time) ==
447 std::make_tuple(rhs.date, rhs.time);
448 }
449 inline bool operator!=(const local_datetime& lhs, const local_datetime& rhs)
450 {
451 return !(lhs == rhs);
452 }
453 inline bool operator< (const local_datetime& lhs, const local_datetime& rhs)
454 {
455 return std::make_tuple(lhs.date, lhs.time) <
456 std::make_tuple(rhs.date, rhs.time);
457 }
458 inline bool operator<=(const local_datetime& lhs, const local_datetime& rhs)
459 {
460 return (lhs < rhs) || (lhs == rhs);
461 }
462 inline bool operator> (const local_datetime& lhs, const local_datetime& rhs)
463 {
464 return !(lhs <= rhs);
465 }
466 inline bool operator>=(const local_datetime& lhs, const local_datetime& rhs)
467 {
468 return !(lhs < rhs);
469 }
470
471 template<typename charT, typename traits>
472 std::basic_ostream<charT, traits>&
473 operator<<(std::basic_ostream<charT, traits>& os, const local_datetime& dt)
474 {
475 os << dt.date << 'T' << dt.time;
476 return os;
477 }
478
479 struct offset_datetime
480 {
481 local_date date{};
482 local_time time{};
483 time_offset offset{};
484
485 offset_datetime(local_date d, local_time t, time_offset o)
486 : date(d), time(t), offset(o)
487 {}
488 offset_datetime(const local_datetime& dt, time_offset o)
489 : date(dt.date), time(dt.time), offset(o)
490 {}
491 explicit offset_datetime(const local_datetime& ld)
492 : date(ld.date), time(ld.time), offset(get_local_offset(nullptr))
493 // use the current local timezone offset
494 {}
495 explicit offset_datetime(const std::chrono::system_clock::time_point& tp)
496 : offset(0, 0) // use gmtime
497 {
498 const auto timet = std::chrono::system_clock::to_time_t(tp);
499 const auto tm = detail::gmtime_s(&timet);
500 this->date = local_date(tm);
501 this->time = local_time(tm);
502 }
503 explicit offset_datetime(const std::time_t& t)
504 : offset(0, 0) // use gmtime
505 {
506 const auto tm = detail::gmtime_s(&t);
507 this->date = local_date(tm);
508 this->time = local_time(tm);
509 }
510 explicit offset_datetime(const std::tm& t)
511 : offset(0, 0) // assume gmtime
512 {
513 this->date = local_date(t);
514 this->time = local_time(t);
515 }
516
517 operator std::chrono::system_clock::time_point() const
518 {
519 // get date-time
520 using internal_duration =
521 typename std::chrono::system_clock::time_point::duration;
522
523 // first, convert it to local date-time information in the same way as
524 // local_datetime does. later we will use time_t to adjust time offset.
525 std::tm t;
526 t.tm_sec = static_cast<int>(this->time.second);
527 t.tm_min = static_cast<int>(this->time.minute);
528 t.tm_hour = static_cast<int>(this->time.hour);
529 t.tm_mday = static_cast<int>(this->date.day);
530 t.tm_mon = static_cast<int>(this->date.month);
531 t.tm_year = static_cast<int>(this->date.year) - 1900;
532 t.tm_wday = 0; // the value will be ignored
533 t.tm_yday = 0; // the value will be ignored
534 t.tm_isdst = -1;
535 const std::time_t tp_loc = std::mktime(std::addressof(t));
536
537 auto tp = std::chrono::system_clock::from_time_t(tp_loc);
538 tp += std::chrono::duration_cast<internal_duration>(
539 std::chrono::milliseconds(this->time.millisecond) +
540 std::chrono::microseconds(this->time.microsecond) +
541 std::chrono::nanoseconds (this->time.nanosecond));
542
543 // Since mktime uses local time zone, it should be corrected.
544 // `12:00:00+09:00` means `03:00:00Z`. So mktime returns `03:00:00Z` if
545 // we are in `+09:00` timezone. To represent `12:00:00Z` there, we need
546 // to add `+09:00` to `03:00:00Z`.
547 // Here, it uses the time_t converted from date-time info to handle
548 // daylight saving time.
549 const auto ofs = get_local_offset(std::addressof(tp_loc));
550 tp += std::chrono::hours (ofs.hour);
551 tp += std::chrono::minutes(ofs.minute);
552
553 // We got `12:00:00Z` by correcting local timezone applied by mktime.
554 // Then we will apply the offset. Let's say `12:00:00-08:00` is given.
555 // And now, we have `12:00:00Z`. `12:00:00-08:00` means `20:00:00Z`.
556 // So we need to subtract the offset.
557 tp -= std::chrono::minutes(this->offset);
558 return tp;
559 }
560
561 operator std::time_t() const
562 {
563 return std::chrono::system_clock::to_time_t(
564 std::chrono::system_clock::time_point(*this));
565 }
566
567 offset_datetime() = default;
568 ~offset_datetime() = default;
569 offset_datetime(offset_datetime const&) = default;
570 offset_datetime(offset_datetime&&) = default;
571 offset_datetime& operator=(offset_datetime const&) = default;
572 offset_datetime& operator=(offset_datetime&&) = default;
573
574 private:
575
576 static time_offset get_local_offset(const std::time_t* tp)
577 {
578 // get local timezone with the same date-time information as mktime
579 const auto t = detail::localtime_s(tp);
580
581 std::array<char, 6> buf;
582 const auto result = std::strftime(buf.data(), 6, "%z", &t); // +hhmm\0
583 if(result != 5)
584 {
585 throw std::runtime_error("toml::offset_datetime: cannot obtain "
586 "timezone information of current env");
587 }
588 const int ofs = std::atoi(buf.data());
589 const int ofs_h = ofs / 100;
590 const int ofs_m = ofs - (ofs_h * 100);
591 return time_offset(ofs_h, ofs_m);
592 }
593 };
594
595 inline bool operator==(const offset_datetime& lhs, const offset_datetime& rhs)
596 {
597 return std::make_tuple(lhs.date, lhs.time, lhs.offset) ==
598 std::make_tuple(rhs.date, rhs.time, rhs.offset);
599 }
600 inline bool operator!=(const offset_datetime& lhs, const offset_datetime& rhs)
601 {
602 return !(lhs == rhs);
603 }
604 inline bool operator< (const offset_datetime& lhs, const offset_datetime& rhs)
605 {
606 return std::make_tuple(lhs.date, lhs.time, lhs.offset) <
607 std::make_tuple(rhs.date, rhs.time, rhs.offset);
608 }
609 inline bool operator<=(const offset_datetime& lhs, const offset_datetime& rhs)
610 {
611 return (lhs < rhs) || (lhs == rhs);
612 }
613 inline bool operator> (const offset_datetime& lhs, const offset_datetime& rhs)
614 {
615 return !(lhs <= rhs);
616 }
617 inline bool operator>=(const offset_datetime& lhs, const offset_datetime& rhs)
618 {
619 return !(lhs < rhs);
620 }
621
622 template<typename charT, typename traits>
623 std::basic_ostream<charT, traits>&
624 operator<<(std::basic_ostream<charT, traits>& os, const offset_datetime& dt)
625 {
626 os << dt.date << 'T' << dt.time << dt.offset;
627 return os;
628 }
629
630 }//toml
631 #endif// TOML11_DATETIME