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2c00a5a8 XL |
1 | // This is a part of Chrono. |
2 | // See README.md and LICENSE.txt for details. | |
3 | ||
4 | //! ISO 8601 calendar date without timezone. | |
5 | ||
f035d41b XL |
6 | #[cfg(any(feature = "alloc", feature = "std", test))] |
7 | use core::borrow::Borrow; | |
49aad941 FG |
8 | use core::convert::TryFrom; |
9 | use core::ops::{Add, AddAssign, RangeInclusive, Sub, SubAssign}; | |
f035d41b | 10 | use core::{fmt, str}; |
49aad941 FG |
11 | |
12 | use num_integer::div_mod_floor; | |
83c7162d | 13 | use num_traits::ToPrimitive; |
49aad941 FG |
14 | #[cfg(feature = "rkyv")] |
15 | use rkyv::{Archive, Deserialize, Serialize}; | |
16 | ||
17 | /// L10n locales. | |
18 | #[cfg(feature = "unstable-locales")] | |
19 | use pure_rust_locales::Locale; | |
2c00a5a8 | 20 | |
f035d41b | 21 | #[cfg(any(feature = "alloc", feature = "std", test))] |
49aad941 FG |
22 | use crate::format::DelayedFormat; |
23 | use crate::format::{parse, write_hundreds, ParseError, ParseResult, Parsed, StrftimeItems}; | |
24 | use crate::format::{Item, Numeric, Pad}; | |
25 | use crate::month::Months; | |
26 | use crate::naive::{IsoWeek, NaiveDateTime, NaiveTime}; | |
27 | use crate::oldtime::Duration as OldDuration; | |
28 | use crate::{Datelike, Duration, Weekday}; | |
2c00a5a8 | 29 | |
f035d41b | 30 | use super::internals::{self, DateImpl, Mdf, Of, YearFlags}; |
2c00a5a8 | 31 | use super::isoweek; |
2c00a5a8 XL |
32 | |
33 | const MAX_YEAR: i32 = internals::MAX_YEAR; | |
34 | const MIN_YEAR: i32 = internals::MIN_YEAR; | |
35 | ||
36 | // MAX_YEAR-12-31 minus 0000-01-01 | |
37 | // = ((MAX_YEAR+1)-01-01 minus 0001-01-01) + (0001-01-01 minus 0000-01-01) - 1 day | |
38 | // = ((MAX_YEAR+1)-01-01 minus 0001-01-01) + 365 days | |
39 | // = MAX_YEAR * 365 + (# of leap years from 0001 to MAX_YEAR) + 365 days | |
40 | #[cfg(test)] // only used for testing | |
f035d41b XL |
41 | const MAX_DAYS_FROM_YEAR_0: i32 = |
42 | MAX_YEAR * 365 + MAX_YEAR / 4 - MAX_YEAR / 100 + MAX_YEAR / 400 + 365; | |
2c00a5a8 XL |
43 | |
44 | // MIN_YEAR-01-01 minus 0000-01-01 | |
45 | // = (MIN_YEAR+400n+1)-01-01 minus (400n+1)-01-01 | |
46 | // = ((MIN_YEAR+400n+1)-01-01 minus 0001-01-01) - ((400n+1)-01-01 minus 0001-01-01) | |
47 | // = ((MIN_YEAR+400n+1)-01-01 minus 0001-01-01) - 146097n days | |
48 | // | |
49 | // n is set to 1000 for convenience. | |
50 | #[cfg(test)] // only used for testing | |
f035d41b XL |
51 | const MIN_DAYS_FROM_YEAR_0: i32 = (MIN_YEAR + 400_000) * 365 + (MIN_YEAR + 400_000) / 4 |
52 | - (MIN_YEAR + 400_000) / 100 | |
53 | + (MIN_YEAR + 400_000) / 400 | |
49aad941 | 54 | - 146_097_000; |
2c00a5a8 XL |
55 | |
56 | #[cfg(test)] // only used for testing, but duplicated in naive::datetime | |
57 | const MAX_BITS: usize = 44; | |
58 | ||
49aad941 FG |
59 | /// A week represented by a [`NaiveDate`] and a [`Weekday`] which is the first |
60 | /// day of the week. | |
61 | #[derive(Debug)] | |
62 | pub struct NaiveWeek { | |
63 | date: NaiveDate, | |
64 | start: Weekday, | |
65 | } | |
66 | ||
67 | impl NaiveWeek { | |
68 | /// Returns a date representing the first day of the week. | |
69 | /// | |
70 | /// # Examples | |
71 | /// | |
72 | /// ``` | |
73 | /// use chrono::{NaiveDate, Weekday}; | |
74 | /// | |
75 | /// let date = NaiveDate::from_ymd_opt(2022, 4, 18).unwrap(); | |
76 | /// let week = date.week(Weekday::Mon); | |
77 | /// assert!(week.first_day() <= date); | |
78 | /// ``` | |
79 | #[inline] | |
80 | pub fn first_day(&self) -> NaiveDate { | |
81 | let start = self.start.num_days_from_monday(); | |
82 | let end = self.date.weekday().num_days_from_monday(); | |
83 | let days = if start > end { 7 - start + end } else { end - start }; | |
84 | self.date - Duration::days(days.into()) | |
85 | } | |
86 | ||
87 | /// Returns a date representing the last day of the week. | |
88 | /// | |
89 | /// # Examples | |
90 | /// | |
91 | /// ``` | |
92 | /// use chrono::{NaiveDate, Weekday}; | |
93 | /// | |
94 | /// let date = NaiveDate::from_ymd_opt(2022, 4, 18).unwrap(); | |
95 | /// let week = date.week(Weekday::Mon); | |
96 | /// assert!(week.last_day() >= date); | |
97 | /// ``` | |
98 | #[inline] | |
99 | pub fn last_day(&self) -> NaiveDate { | |
100 | self.first_day() + Duration::days(6) | |
101 | } | |
102 | ||
103 | /// Returns a [`RangeInclusive<T>`] representing the whole week bounded by | |
104 | /// [first_day](./struct.NaiveWeek.html#method.first_day) and | |
105 | /// [last_day](./struct.NaiveWeek.html#method.last_day) functions. | |
106 | /// | |
107 | /// # Examples | |
108 | /// | |
109 | /// ``` | |
110 | /// use chrono::{NaiveDate, Weekday}; | |
111 | /// | |
112 | /// let date = NaiveDate::from_ymd_opt(2022, 4, 18).unwrap(); | |
113 | /// let week = date.week(Weekday::Mon); | |
114 | /// let days = week.days(); | |
115 | /// assert!(days.contains(&date)); | |
116 | /// ``` | |
117 | #[inline] | |
118 | pub fn days(&self) -> RangeInclusive<NaiveDate> { | |
119 | self.first_day()..=self.last_day() | |
120 | } | |
121 | } | |
122 | ||
123 | /// A duration in calendar days. | |
124 | /// | |
125 | /// This is useful because when using `Duration` it is possible | |
126 | /// that adding `Duration::days(1)` doesn't increment the day value as expected due to it being a | |
127 | /// fixed number of seconds. This difference applies only when dealing with `DateTime<TimeZone>` data types | |
128 | /// and in other cases `Duration::days(n)` and `Days::new(n)` are equivalent. | |
129 | #[derive(Clone, Copy, Debug, Eq, Hash, PartialEq, PartialOrd)] | |
130 | pub struct Days(pub(crate) u64); | |
131 | ||
132 | impl Days { | |
133 | /// Construct a new `Days` from a number of days | |
134 | pub const fn new(num: u64) -> Self { | |
135 | Self(num) | |
136 | } | |
137 | } | |
138 | ||
2c00a5a8 XL |
139 | /// ISO 8601 calendar date without timezone. |
140 | /// Allows for every [proleptic Gregorian date](#calendar-date) | |
141 | /// from Jan 1, 262145 BCE to Dec 31, 262143 CE. | |
142 | /// Also supports the conversion from ISO 8601 ordinal and week date. | |
143 | /// | |
144 | /// # Calendar Date | |
145 | /// | |
146 | /// The ISO 8601 **calendar date** follows the proleptic Gregorian calendar. | |
147 | /// It is like a normal civil calendar but note some slight differences: | |
148 | /// | |
149 | /// * Dates before the Gregorian calendar's inception in 1582 are defined via the extrapolation. | |
150 | /// Be careful, as historical dates are often noted in the Julian calendar and others | |
151 | /// and the transition to Gregorian may differ across countries (as late as early 20C). | |
152 | /// | |
153 | /// (Some example: Both Shakespeare from Britain and Cervantes from Spain seemingly died | |
154 | /// on the same calendar date---April 23, 1616---but in the different calendar. | |
155 | /// Britain used the Julian calendar at that time, so Shakespeare's death is later.) | |
156 | /// | |
157 | /// * ISO 8601 calendars has the year 0, which is 1 BCE (a year before 1 CE). | |
158 | /// If you need a typical BCE/BC and CE/AD notation for year numbers, | |
159 | /// use the [`Datelike::year_ce`](../trait.Datelike.html#method.year_ce) method. | |
160 | /// | |
161 | /// # Week Date | |
162 | /// | |
163 | /// The ISO 8601 **week date** is a triple of year number, week number | |
164 | /// and [day of the week](../enum.Weekday.html) with the following rules: | |
165 | /// | |
166 | /// * A week consists of Monday through Sunday, and is always numbered within some year. | |
167 | /// The week number ranges from 1 to 52 or 53 depending on the year. | |
168 | /// | |
169 | /// * The week 1 of given year is defined as the first week containing January 4 of that year, | |
170 | /// or equivalently, the first week containing four or more days in that year. | |
171 | /// | |
172 | /// * The year number in the week date may *not* correspond to the actual Gregorian year. | |
173 | /// For example, January 3, 2016 (Sunday) was on the last (53rd) week of 2015. | |
174 | /// | |
175 | /// Chrono's date types default to the ISO 8601 [calendar date](#calendar-date), | |
176 | /// but [`Datelike::iso_week`](../trait.Datelike.html#tymethod.iso_week) and | |
177 | /// [`Datelike::weekday`](../trait.Datelike.html#tymethod.weekday) methods | |
178 | /// can be used to get the corresponding week date. | |
179 | /// | |
180 | /// # Ordinal Date | |
181 | /// | |
182 | /// The ISO 8601 **ordinal date** is a pair of year number and day of the year ("ordinal"). | |
183 | /// The ordinal number ranges from 1 to 365 or 366 depending on the year. | |
f035d41b | 184 | /// The year number is the same as that of the [calendar date](#calendar-date). |
2c00a5a8 XL |
185 | /// |
186 | /// This is currently the internal format of Chrono's date types. | |
83c7162d | 187 | #[derive(PartialEq, Eq, Hash, PartialOrd, Ord, Copy, Clone)] |
49aad941 | 188 | #[cfg_attr(feature = "rkyv", derive(Archive, Deserialize, Serialize))] |
2c00a5a8 XL |
189 | pub struct NaiveDate { |
190 | ymdf: DateImpl, // (year << 13) | of | |
191 | } | |
192 | ||
193 | /// The minimum possible `NaiveDate` (January 1, 262145 BCE). | |
49aad941 FG |
194 | #[deprecated(since = "0.4.20", note = "Use NaiveDate::MIN instead")] |
195 | pub const MIN_DATE: NaiveDate = NaiveDate::MIN; | |
2c00a5a8 | 196 | /// The maximum possible `NaiveDate` (December 31, 262143 CE). |
49aad941 FG |
197 | #[deprecated(since = "0.4.20", note = "Use NaiveDate::MAX instead")] |
198 | pub const MAX_DATE: NaiveDate = NaiveDate::MAX; | |
199 | ||
200 | #[cfg(feature = "arbitrary")] | |
201 | impl arbitrary::Arbitrary<'_> for NaiveDate { | |
202 | fn arbitrary(u: &mut arbitrary::Unstructured) -> arbitrary::Result<NaiveDate> { | |
203 | let year = u.int_in_range(MIN_YEAR..=MAX_YEAR)?; | |
204 | let max_days = YearFlags::from_year(year).ndays(); | |
205 | let ord = u.int_in_range(1..=max_days)?; | |
206 | NaiveDate::from_yo_opt(year, ord).ok_or(arbitrary::Error::IncorrectFormat) | |
207 | } | |
208 | } | |
2c00a5a8 | 209 | |
49aad941 | 210 | // as it is hard to verify year flags in `NaiveDate::MIN` and `NaiveDate::MAX`, |
2c00a5a8 XL |
211 | // we use a separate run-time test. |
212 | #[test] | |
213 | fn test_date_bounds() { | |
49aad941 FG |
214 | let calculated_min = NaiveDate::from_ymd_opt(MIN_YEAR, 1, 1).unwrap(); |
215 | let calculated_max = NaiveDate::from_ymd_opt(MAX_YEAR, 12, 31).unwrap(); | |
f035d41b | 216 | assert!( |
49aad941 FG |
217 | NaiveDate::MIN == calculated_min, |
218 | "`NaiveDate::MIN` should have a year flag {:?}", | |
f035d41b XL |
219 | calculated_min.of().flags() |
220 | ); | |
221 | assert!( | |
49aad941 FG |
222 | NaiveDate::MAX == calculated_max, |
223 | "`NaiveDate::MAX` should have a year flag {:?}", | |
f035d41b XL |
224 | calculated_max.of().flags() |
225 | ); | |
2c00a5a8 XL |
226 | |
227 | // let's also check that the entire range do not exceed 2^44 seconds | |
228 | // (sometimes used for bounding `Duration` against overflow) | |
49aad941 | 229 | let maxsecs = NaiveDate::MAX.signed_duration_since(NaiveDate::MIN).num_seconds(); |
2c00a5a8 | 230 | let maxsecs = maxsecs + 86401; // also take care of DateTime |
f035d41b XL |
231 | assert!( |
232 | maxsecs < (1 << MAX_BITS), | |
233 | "The entire `NaiveDate` range somehow exceeds 2^{} seconds", | |
234 | MAX_BITS | |
235 | ); | |
2c00a5a8 XL |
236 | } |
237 | ||
238 | impl NaiveDate { | |
49aad941 FG |
239 | pub(crate) fn weeks_from(&self, day: Weekday) -> i32 { |
240 | (self.ordinal() as i32 - self.weekday().num_days_from(day) as i32 + 6) / 7 | |
241 | } | |
2c00a5a8 XL |
242 | /// Makes a new `NaiveDate` from year and packed ordinal-flags, with a verification. |
243 | fn from_of(year: i32, of: Of) -> Option<NaiveDate> { | |
49aad941 | 244 | if (MIN_YEAR..=MAX_YEAR).contains(&year) && of.valid() { |
2c00a5a8 XL |
245 | let Of(of) = of; |
246 | Some(NaiveDate { ymdf: (year << 13) | (of as DateImpl) }) | |
247 | } else { | |
248 | None | |
249 | } | |
250 | } | |
251 | ||
252 | /// Makes a new `NaiveDate` from year and packed month-day-flags, with a verification. | |
253 | fn from_mdf(year: i32, mdf: Mdf) -> Option<NaiveDate> { | |
254 | NaiveDate::from_of(year, mdf.to_of()) | |
255 | } | |
256 | ||
257 | /// Makes a new `NaiveDate` from the [calendar date](#calendar-date) | |
258 | /// (year, month and day). | |
259 | /// | |
260 | /// Panics on the out-of-range date, invalid month and/or day. | |
49aad941 | 261 | #[deprecated(since = "0.4.23", note = "use `from_ymd_opt()` instead")] |
2c00a5a8 XL |
262 | pub fn from_ymd(year: i32, month: u32, day: u32) -> NaiveDate { |
263 | NaiveDate::from_ymd_opt(year, month, day).expect("invalid or out-of-range date") | |
264 | } | |
265 | ||
266 | /// Makes a new `NaiveDate` from the [calendar date](#calendar-date) | |
267 | /// (year, month and day). | |
268 | /// | |
269 | /// Returns `None` on the out-of-range date, invalid month and/or day. | |
270 | /// | |
271 | /// # Example | |
272 | /// | |
49aad941 | 273 | /// ``` |
2c00a5a8 XL |
274 | /// use chrono::NaiveDate; |
275 | /// | |
276 | /// let from_ymd_opt = NaiveDate::from_ymd_opt; | |
277 | /// | |
278 | /// assert!(from_ymd_opt(2015, 3, 14).is_some()); | |
279 | /// assert!(from_ymd_opt(2015, 0, 14).is_none()); | |
280 | /// assert!(from_ymd_opt(2015, 2, 29).is_none()); | |
281 | /// assert!(from_ymd_opt(-4, 2, 29).is_some()); // 5 BCE is a leap year | |
282 | /// assert!(from_ymd_opt(400000, 1, 1).is_none()); | |
283 | /// assert!(from_ymd_opt(-400000, 1, 1).is_none()); | |
49aad941 | 284 | /// ``` |
2c00a5a8 XL |
285 | pub fn from_ymd_opt(year: i32, month: u32, day: u32) -> Option<NaiveDate> { |
286 | let flags = YearFlags::from_year(year); | |
49aad941 | 287 | NaiveDate::from_mdf(year, Mdf::new(month, day, flags)?) |
2c00a5a8 XL |
288 | } |
289 | ||
290 | /// Makes a new `NaiveDate` from the [ordinal date](#ordinal-date) | |
291 | /// (year and day of the year). | |
292 | /// | |
293 | /// Panics on the out-of-range date and/or invalid day of year. | |
49aad941 | 294 | #[deprecated(since = "0.4.23", note = "use `from_yo_opt()` instead")] |
2c00a5a8 XL |
295 | pub fn from_yo(year: i32, ordinal: u32) -> NaiveDate { |
296 | NaiveDate::from_yo_opt(year, ordinal).expect("invalid or out-of-range date") | |
297 | } | |
298 | ||
299 | /// Makes a new `NaiveDate` from the [ordinal date](#ordinal-date) | |
300 | /// (year and day of the year). | |
301 | /// | |
302 | /// Returns `None` on the out-of-range date and/or invalid day of year. | |
303 | /// | |
304 | /// # Example | |
305 | /// | |
49aad941 | 306 | /// ``` |
2c00a5a8 XL |
307 | /// use chrono::NaiveDate; |
308 | /// | |
309 | /// let from_yo_opt = NaiveDate::from_yo_opt; | |
310 | /// | |
311 | /// assert!(from_yo_opt(2015, 100).is_some()); | |
312 | /// assert!(from_yo_opt(2015, 0).is_none()); | |
313 | /// assert!(from_yo_opt(2015, 365).is_some()); | |
314 | /// assert!(from_yo_opt(2015, 366).is_none()); | |
315 | /// assert!(from_yo_opt(-4, 366).is_some()); // 5 BCE is a leap year | |
316 | /// assert!(from_yo_opt(400000, 1).is_none()); | |
317 | /// assert!(from_yo_opt(-400000, 1).is_none()); | |
49aad941 | 318 | /// ``` |
2c00a5a8 XL |
319 | pub fn from_yo_opt(year: i32, ordinal: u32) -> Option<NaiveDate> { |
320 | let flags = YearFlags::from_year(year); | |
49aad941 | 321 | NaiveDate::from_of(year, Of::new(ordinal, flags)?) |
2c00a5a8 XL |
322 | } |
323 | ||
324 | /// Makes a new `NaiveDate` from the [ISO week date](#week-date) | |
325 | /// (year, week number and day of the week). | |
326 | /// The resulting `NaiveDate` may have a different year from the input year. | |
327 | /// | |
328 | /// Panics on the out-of-range date and/or invalid week number. | |
49aad941 | 329 | #[deprecated(since = "0.4.23", note = "use `from_isoywd_opt()` instead")] |
2c00a5a8 XL |
330 | pub fn from_isoywd(year: i32, week: u32, weekday: Weekday) -> NaiveDate { |
331 | NaiveDate::from_isoywd_opt(year, week, weekday).expect("invalid or out-of-range date") | |
332 | } | |
333 | ||
334 | /// Makes a new `NaiveDate` from the [ISO week date](#week-date) | |
335 | /// (year, week number and day of the week). | |
336 | /// The resulting `NaiveDate` may have a different year from the input year. | |
337 | /// | |
338 | /// Returns `None` on the out-of-range date and/or invalid week number. | |
339 | /// | |
340 | /// # Example | |
341 | /// | |
49aad941 | 342 | /// ``` |
2c00a5a8 XL |
343 | /// use chrono::{NaiveDate, Weekday}; |
344 | /// | |
345 | /// let from_ymd = NaiveDate::from_ymd; | |
346 | /// let from_isoywd_opt = NaiveDate::from_isoywd_opt; | |
347 | /// | |
348 | /// assert_eq!(from_isoywd_opt(2015, 0, Weekday::Sun), None); | |
349 | /// assert_eq!(from_isoywd_opt(2015, 10, Weekday::Sun), Some(from_ymd(2015, 3, 8))); | |
350 | /// assert_eq!(from_isoywd_opt(2015, 30, Weekday::Mon), Some(from_ymd(2015, 7, 20))); | |
351 | /// assert_eq!(from_isoywd_opt(2015, 60, Weekday::Mon), None); | |
352 | /// | |
353 | /// assert_eq!(from_isoywd_opt(400000, 10, Weekday::Fri), None); | |
354 | /// assert_eq!(from_isoywd_opt(-400000, 10, Weekday::Sat), None); | |
49aad941 | 355 | /// ``` |
2c00a5a8 XL |
356 | /// |
357 | /// The year number of ISO week date may differ from that of the calendar date. | |
358 | /// | |
49aad941 | 359 | /// ``` |
2c00a5a8 XL |
360 | /// # use chrono::{NaiveDate, Weekday}; |
361 | /// # let from_ymd = NaiveDate::from_ymd; | |
362 | /// # let from_isoywd_opt = NaiveDate::from_isoywd_opt; | |
363 | /// // Mo Tu We Th Fr Sa Su | |
364 | /// // 2014-W52 22 23 24 25 26 27 28 has 4+ days of new year, | |
365 | /// // 2015-W01 29 30 31 1 2 3 4 <- so this is the first week | |
366 | /// assert_eq!(from_isoywd_opt(2014, 52, Weekday::Sun), Some(from_ymd(2014, 12, 28))); | |
367 | /// assert_eq!(from_isoywd_opt(2014, 53, Weekday::Mon), None); | |
368 | /// assert_eq!(from_isoywd_opt(2015, 1, Weekday::Mon), Some(from_ymd(2014, 12, 29))); | |
369 | /// | |
370 | /// // 2015-W52 21 22 23 24 25 26 27 has 4+ days of old year, | |
371 | /// // 2015-W53 28 29 30 31 1 2 3 <- so this is the last week | |
372 | /// // 2016-W01 4 5 6 7 8 9 10 | |
373 | /// assert_eq!(from_isoywd_opt(2015, 52, Weekday::Sun), Some(from_ymd(2015, 12, 27))); | |
374 | /// assert_eq!(from_isoywd_opt(2015, 53, Weekday::Sun), Some(from_ymd(2016, 1, 3))); | |
375 | /// assert_eq!(from_isoywd_opt(2015, 54, Weekday::Mon), None); | |
376 | /// assert_eq!(from_isoywd_opt(2016, 1, Weekday::Mon), Some(from_ymd(2016, 1, 4))); | |
49aad941 | 377 | /// ``` |
2c00a5a8 XL |
378 | pub fn from_isoywd_opt(year: i32, week: u32, weekday: Weekday) -> Option<NaiveDate> { |
379 | let flags = YearFlags::from_year(year); | |
380 | let nweeks = flags.nisoweeks(); | |
381 | if 1 <= week && week <= nweeks { | |
382 | // ordinal = week ordinal - delta | |
383 | let weekord = week * 7 + weekday as u32; | |
384 | let delta = flags.isoweek_delta(); | |
f035d41b XL |
385 | if weekord <= delta { |
386 | // ordinal < 1, previous year | |
2c00a5a8 | 387 | let prevflags = YearFlags::from_year(year - 1); |
f035d41b XL |
388 | NaiveDate::from_of( |
389 | year - 1, | |
49aad941 | 390 | Of::new(weekord + prevflags.ndays() - delta, prevflags)?, |
f035d41b | 391 | ) |
2c00a5a8 XL |
392 | } else { |
393 | let ordinal = weekord - delta; | |
394 | let ndays = flags.ndays(); | |
f035d41b XL |
395 | if ordinal <= ndays { |
396 | // this year | |
49aad941 | 397 | NaiveDate::from_of(year, Of::new(ordinal, flags)?) |
f035d41b XL |
398 | } else { |
399 | // ordinal > ndays, next year | |
2c00a5a8 | 400 | let nextflags = YearFlags::from_year(year + 1); |
49aad941 | 401 | NaiveDate::from_of(year + 1, Of::new(ordinal - ndays, nextflags)?) |
2c00a5a8 XL |
402 | } |
403 | } | |
404 | } else { | |
405 | None | |
406 | } | |
407 | } | |
408 | ||
f035d41b XL |
409 | /// Makes a new `NaiveDate` from a day's number in the proleptic Gregorian calendar, with |
410 | /// January 1, 1 being day 1. | |
2c00a5a8 | 411 | /// |
f035d41b | 412 | /// Panics if the date is out of range. |
49aad941 | 413 | #[deprecated(since = "0.4.23", note = "use `from_num_days_from_ce_opt()` instead")] |
2c00a5a8 XL |
414 | #[inline] |
415 | pub fn from_num_days_from_ce(days: i32) -> NaiveDate { | |
416 | NaiveDate::from_num_days_from_ce_opt(days).expect("out-of-range date") | |
417 | } | |
418 | ||
f035d41b XL |
419 | /// Makes a new `NaiveDate` from a day's number in the proleptic Gregorian calendar, with |
420 | /// January 1, 1 being day 1. | |
2c00a5a8 | 421 | /// |
f035d41b | 422 | /// Returns `None` if the date is out of range. |
2c00a5a8 XL |
423 | /// |
424 | /// # Example | |
425 | /// | |
49aad941 | 426 | /// ``` |
2c00a5a8 XL |
427 | /// use chrono::NaiveDate; |
428 | /// | |
429 | /// let from_ndays_opt = NaiveDate::from_num_days_from_ce_opt; | |
49aad941 | 430 | /// let from_ymd = |y, m, d| NaiveDate::from_ymd_opt(y, m, d).unwrap(); |
2c00a5a8 XL |
431 | /// |
432 | /// assert_eq!(from_ndays_opt(730_000), Some(from_ymd(1999, 9, 3))); | |
433 | /// assert_eq!(from_ndays_opt(1), Some(from_ymd(1, 1, 1))); | |
434 | /// assert_eq!(from_ndays_opt(0), Some(from_ymd(0, 12, 31))); | |
435 | /// assert_eq!(from_ndays_opt(-1), Some(from_ymd(0, 12, 30))); | |
436 | /// assert_eq!(from_ndays_opt(100_000_000), None); | |
437 | /// assert_eq!(from_ndays_opt(-100_000_000), None); | |
49aad941 | 438 | /// ``` |
2c00a5a8 XL |
439 | pub fn from_num_days_from_ce_opt(days: i32) -> Option<NaiveDate> { |
440 | let days = days + 365; // make December 31, 1 BCE equal to day 0 | |
83c7162d | 441 | let (year_div_400, cycle) = div_mod_floor(days, 146_097); |
2c00a5a8 XL |
442 | let (year_mod_400, ordinal) = internals::cycle_to_yo(cycle as u32); |
443 | let flags = YearFlags::from_year_mod_400(year_mod_400 as i32); | |
49aad941 | 444 | NaiveDate::from_of(year_div_400 * 400 + year_mod_400 as i32, Of::new(ordinal, flags)?) |
f035d41b XL |
445 | } |
446 | ||
447 | /// Makes a new `NaiveDate` by counting the number of occurrences of a particular day-of-week | |
448 | /// since the beginning of the given month. For instance, if you want the 2nd Friday of March | |
449 | /// 2017, you would use `NaiveDate::from_weekday_of_month(2017, 3, Weekday::Fri, 2)`. | |
450 | /// | |
451 | /// # Panics | |
452 | /// | |
453 | /// The resulting `NaiveDate` is guaranteed to be in `month`. If `n` is larger than the number | |
454 | /// of `weekday` in `month` (eg. the 6th Friday of March 2017) then this function will panic. | |
455 | /// | |
456 | /// `n` is 1-indexed. Passing `n=0` will cause a panic. | |
49aad941 | 457 | #[deprecated(since = "0.4.23", note = "use `from_weekday_of_month_opt()` instead")] |
f035d41b XL |
458 | pub fn from_weekday_of_month(year: i32, month: u32, weekday: Weekday, n: u8) -> NaiveDate { |
459 | NaiveDate::from_weekday_of_month_opt(year, month, weekday, n).expect("out-of-range date") | |
460 | } | |
461 | ||
462 | /// Makes a new `NaiveDate` by counting the number of occurrences of a particular day-of-week | |
463 | /// since the beginning of the given month. For instance, if you want the 2nd Friday of March | |
464 | /// 2017, you would use `NaiveDate::from_weekday_of_month(2017, 3, Weekday::Fri, 2)`. `n` is 1-indexed. | |
465 | /// | |
49aad941 | 466 | /// ``` |
f035d41b XL |
467 | /// use chrono::{NaiveDate, Weekday}; |
468 | /// assert_eq!(NaiveDate::from_weekday_of_month_opt(2017, 3, Weekday::Fri, 2), | |
469 | /// NaiveDate::from_ymd_opt(2017, 3, 10)) | |
49aad941 | 470 | /// ``` |
f035d41b XL |
471 | /// |
472 | /// Returns `None` if `n` out-of-range; ie. if `n` is larger than the number of `weekday` in | |
473 | /// `month` (eg. the 6th Friday of March 2017), or if `n == 0`. | |
474 | pub fn from_weekday_of_month_opt( | |
475 | year: i32, | |
476 | month: u32, | |
477 | weekday: Weekday, | |
478 | n: u8, | |
479 | ) -> Option<NaiveDate> { | |
480 | if n == 0 { | |
481 | return None; | |
482 | } | |
49aad941 | 483 | let first = NaiveDate::from_ymd_opt(year, month, 1)?.weekday(); |
f035d41b XL |
484 | let first_to_dow = (7 + weekday.number_from_monday() - first.number_from_monday()) % 7; |
485 | let day = (u32::from(n) - 1) * 7 + first_to_dow + 1; | |
486 | NaiveDate::from_ymd_opt(year, month, day) | |
2c00a5a8 XL |
487 | } |
488 | ||
489 | /// Parses a string with the specified format string and returns a new `NaiveDate`. | |
490 | /// See the [`format::strftime` module](../format/strftime/index.html) | |
491 | /// on the supported escape sequences. | |
492 | /// | |
493 | /// # Example | |
494 | /// | |
49aad941 | 495 | /// ``` |
2c00a5a8 XL |
496 | /// use chrono::NaiveDate; |
497 | /// | |
498 | /// let parse_from_str = NaiveDate::parse_from_str; | |
499 | /// | |
500 | /// assert_eq!(parse_from_str("2015-09-05", "%Y-%m-%d"), | |
49aad941 | 501 | /// Ok(NaiveDate::from_ymd_opt(2015, 9, 5).unwrap())); |
2c00a5a8 | 502 | /// assert_eq!(parse_from_str("5sep2015", "%d%b%Y"), |
49aad941 FG |
503 | /// Ok(NaiveDate::from_ymd_opt(2015, 9, 5).unwrap())); |
504 | /// ``` | |
2c00a5a8 XL |
505 | /// |
506 | /// Time and offset is ignored for the purpose of parsing. | |
507 | /// | |
49aad941 | 508 | /// ``` |
2c00a5a8 XL |
509 | /// # use chrono::NaiveDate; |
510 | /// # let parse_from_str = NaiveDate::parse_from_str; | |
511 | /// assert_eq!(parse_from_str("2014-5-17T12:34:56+09:30", "%Y-%m-%dT%H:%M:%S%z"), | |
49aad941 FG |
512 | /// Ok(NaiveDate::from_ymd_opt(2014, 5, 17).unwrap())); |
513 | /// ``` | |
2c00a5a8 XL |
514 | /// |
515 | /// Out-of-bound dates or insufficient fields are errors. | |
516 | /// | |
49aad941 | 517 | /// ``` |
2c00a5a8 XL |
518 | /// # use chrono::NaiveDate; |
519 | /// # let parse_from_str = NaiveDate::parse_from_str; | |
520 | /// assert!(parse_from_str("2015/9", "%Y/%m").is_err()); | |
521 | /// assert!(parse_from_str("2015/9/31", "%Y/%m/%d").is_err()); | |
49aad941 | 522 | /// ``` |
2c00a5a8 XL |
523 | /// |
524 | /// All parsed fields should be consistent to each other, otherwise it's an error. | |
525 | /// | |
49aad941 | 526 | /// ``` |
2c00a5a8 XL |
527 | /// # use chrono::NaiveDate; |
528 | /// # let parse_from_str = NaiveDate::parse_from_str; | |
529 | /// assert!(parse_from_str("Sat, 09 Aug 2013", "%a, %d %b %Y").is_err()); | |
49aad941 | 530 | /// ``` |
2c00a5a8 XL |
531 | pub fn parse_from_str(s: &str, fmt: &str) -> ParseResult<NaiveDate> { |
532 | let mut parsed = Parsed::new(); | |
f035d41b | 533 | parse(&mut parsed, s, StrftimeItems::new(fmt))?; |
2c00a5a8 XL |
534 | parsed.to_naive_date() |
535 | } | |
536 | ||
49aad941 FG |
537 | /// Add a duration in [`Months`] to the date |
538 | /// | |
539 | /// If the day would be out of range for the resulting month, use the last day for that month. | |
540 | /// | |
541 | /// Returns `None` if the resulting date would be out of range. | |
542 | /// | |
543 | /// ``` | |
544 | /// # use chrono::{NaiveDate, Months}; | |
545 | /// assert_eq!( | |
546 | /// NaiveDate::from_ymd_opt(2022, 2, 20).unwrap().checked_add_months(Months::new(6)), | |
547 | /// Some(NaiveDate::from_ymd_opt(2022, 8, 20).unwrap()) | |
548 | /// ); | |
549 | /// assert_eq!( | |
550 | /// NaiveDate::from_ymd_opt(2022, 7, 31).unwrap().checked_add_months(Months::new(2)), | |
551 | /// Some(NaiveDate::from_ymd_opt(2022, 9, 30).unwrap()) | |
552 | /// ); | |
553 | /// ``` | |
554 | pub fn checked_add_months(self, months: Months) -> Option<Self> { | |
555 | if months.0 == 0 { | |
556 | return Some(self); | |
557 | } | |
558 | ||
559 | match months.0 <= core::i32::MAX as u32 { | |
560 | true => self.diff_months(months.0 as i32), | |
561 | false => None, | |
562 | } | |
563 | } | |
564 | ||
565 | /// Subtract a duration in [`Months`] from the date | |
566 | /// | |
567 | /// If the day would be out of range for the resulting month, use the last day for that month. | |
568 | /// | |
569 | /// Returns `None` if the resulting date would be out of range. | |
570 | /// | |
571 | /// ``` | |
572 | /// # use chrono::{NaiveDate, Months}; | |
573 | /// assert_eq!( | |
574 | /// NaiveDate::from_ymd_opt(2022, 2, 20).unwrap().checked_sub_months(Months::new(6)), | |
575 | /// Some(NaiveDate::from_ymd_opt(2021, 8, 20).unwrap()) | |
576 | /// ); | |
577 | /// | |
578 | /// assert_eq!( | |
579 | /// NaiveDate::from_ymd_opt(2014, 1, 1).unwrap() | |
580 | /// .checked_sub_months(Months::new(core::i32::MAX as u32 + 1)), | |
581 | /// None | |
582 | /// ); | |
583 | /// ``` | |
584 | pub fn checked_sub_months(self, months: Months) -> Option<Self> { | |
585 | if months.0 == 0 { | |
586 | return Some(self); | |
587 | } | |
588 | ||
589 | // Copy `i32::MAX` here so we don't have to do a complicated cast | |
590 | match months.0 <= 2_147_483_647 { | |
591 | true => self.diff_months(-(months.0 as i32)), | |
592 | false => None, | |
593 | } | |
594 | } | |
595 | ||
596 | fn diff_months(self, months: i32) -> Option<Self> { | |
597 | let (years, left) = ((months / 12), (months % 12)); | |
598 | ||
599 | // Determine new year (without taking months into account for now | |
600 | ||
601 | let year = if (years > 0 && years > (MAX_YEAR - self.year())) | |
602 | || (years < 0 && years < (MIN_YEAR - self.year())) | |
603 | { | |
604 | return None; | |
605 | } else { | |
606 | self.year() + years | |
607 | }; | |
608 | ||
609 | // Determine new month | |
610 | ||
611 | let month = self.month() as i32 + left; | |
612 | let (year, month) = if month <= 0 { | |
613 | if year == MIN_YEAR { | |
614 | return None; | |
615 | } | |
616 | ||
617 | (year - 1, month + 12) | |
618 | } else if month > 12 { | |
619 | if year == MAX_YEAR { | |
620 | return None; | |
621 | } | |
622 | ||
623 | (year + 1, month - 12) | |
624 | } else { | |
625 | (year, month) | |
626 | }; | |
627 | ||
628 | // Clamp original day in case new month is shorter | |
629 | ||
630 | let flags = YearFlags::from_year(year); | |
631 | let feb_days = if flags.ndays() == 366 { 29 } else { 28 }; | |
632 | let days = [31, feb_days, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]; | |
633 | let day = Ord::min(self.day(), days[(month - 1) as usize]); | |
634 | ||
635 | NaiveDate::from_mdf(year, Mdf::new(month as u32, day, flags)?) | |
636 | } | |
637 | ||
638 | /// Add a duration in [`Days`] to the date | |
639 | /// | |
640 | /// Returns `None` if the resulting date would be out of range. | |
641 | /// | |
642 | /// ``` | |
643 | /// # use chrono::{NaiveDate, Days}; | |
644 | /// assert_eq!( | |
645 | /// NaiveDate::from_ymd_opt(2022, 2, 20).unwrap().checked_add_days(Days::new(9)), | |
646 | /// Some(NaiveDate::from_ymd_opt(2022, 3, 1).unwrap()) | |
647 | /// ); | |
648 | /// assert_eq!( | |
649 | /// NaiveDate::from_ymd_opt(2022, 7, 31).unwrap().checked_add_days(Days::new(2)), | |
650 | /// Some(NaiveDate::from_ymd_opt(2022, 8, 2).unwrap()) | |
651 | /// ); | |
652 | /// assert_eq!( | |
653 | /// NaiveDate::from_ymd_opt(2022, 7, 31).unwrap().checked_add_days(Days::new(1000000000000)), | |
654 | /// None | |
655 | /// ); | |
656 | /// ``` | |
657 | pub fn checked_add_days(self, days: Days) -> Option<Self> { | |
658 | if days.0 == 0 { | |
659 | return Some(self); | |
660 | } | |
661 | ||
662 | i64::try_from(days.0).ok().and_then(|d| self.diff_days(d)) | |
663 | } | |
664 | ||
665 | /// Subtract a duration in [`Days`] from the date | |
666 | /// | |
667 | /// Returns `None` if the resulting date would be out of range. | |
668 | /// | |
669 | /// ``` | |
670 | /// # use chrono::{NaiveDate, Days}; | |
671 | /// assert_eq!( | |
672 | /// NaiveDate::from_ymd_opt(2022, 2, 20).unwrap().checked_sub_days(Days::new(6)), | |
673 | /// Some(NaiveDate::from_ymd_opt(2022, 2, 14).unwrap()) | |
674 | /// ); | |
675 | /// assert_eq!( | |
676 | /// NaiveDate::from_ymd_opt(2022, 2, 20).unwrap().checked_sub_days(Days::new(1000000000000)), | |
677 | /// None | |
678 | /// ); | |
679 | /// ``` | |
680 | pub fn checked_sub_days(self, days: Days) -> Option<Self> { | |
681 | if days.0 == 0 { | |
682 | return Some(self); | |
683 | } | |
684 | ||
685 | i64::try_from(days.0).ok().and_then(|d| self.diff_days(-d)) | |
686 | } | |
687 | ||
688 | fn diff_days(self, days: i64) -> Option<Self> { | |
689 | let secs = days.checked_mul(86400)?; // 86400 seconds in one day | |
690 | if secs >= core::i64::MAX / 1000 || secs <= core::i64::MIN / 1000 { | |
691 | return None; // See the `time` 0.1 crate. Outside these bounds, `Duration::seconds` will panic | |
692 | } | |
693 | self.checked_add_signed(Duration::seconds(secs)) | |
694 | } | |
695 | ||
2c00a5a8 XL |
696 | /// Makes a new `NaiveDateTime` from the current date and given `NaiveTime`. |
697 | /// | |
698 | /// # Example | |
699 | /// | |
49aad941 | 700 | /// ``` |
2c00a5a8 XL |
701 | /// use chrono::{NaiveDate, NaiveTime, NaiveDateTime}; |
702 | /// | |
49aad941 FG |
703 | /// let d = NaiveDate::from_ymd_opt(2015, 6, 3).unwrap(); |
704 | /// let t = NaiveTime::from_hms_milli_opt(12, 34, 56, 789).unwrap(); | |
2c00a5a8 XL |
705 | /// |
706 | /// let dt: NaiveDateTime = d.and_time(t); | |
707 | /// assert_eq!(dt.date(), d); | |
708 | /// assert_eq!(dt.time(), t); | |
49aad941 | 709 | /// ``` |
2c00a5a8 | 710 | #[inline] |
49aad941 | 711 | pub const fn and_time(&self, time: NaiveTime) -> NaiveDateTime { |
2c00a5a8 XL |
712 | NaiveDateTime::new(*self, time) |
713 | } | |
714 | ||
715 | /// Makes a new `NaiveDateTime` from the current date, hour, minute and second. | |
716 | /// | |
717 | /// No [leap second](./struct.NaiveTime.html#leap-second-handling) is allowed here; | |
718 | /// use `NaiveDate::and_hms_*` methods with a subsecond parameter instead. | |
719 | /// | |
720 | /// Panics on invalid hour, minute and/or second. | |
49aad941 | 721 | #[deprecated(since = "0.4.23", note = "use `and_hms_opt()` instead")] |
2c00a5a8 XL |
722 | #[inline] |
723 | pub fn and_hms(&self, hour: u32, min: u32, sec: u32) -> NaiveDateTime { | |
724 | self.and_hms_opt(hour, min, sec).expect("invalid time") | |
725 | } | |
726 | ||
727 | /// Makes a new `NaiveDateTime` from the current date, hour, minute and second. | |
728 | /// | |
729 | /// No [leap second](./struct.NaiveTime.html#leap-second-handling) is allowed here; | |
730 | /// use `NaiveDate::and_hms_*_opt` methods with a subsecond parameter instead. | |
731 | /// | |
732 | /// Returns `None` on invalid hour, minute and/or second. | |
733 | /// | |
734 | /// # Example | |
735 | /// | |
49aad941 | 736 | /// ``` |
2c00a5a8 XL |
737 | /// use chrono::NaiveDate; |
738 | /// | |
49aad941 | 739 | /// let d = NaiveDate::from_ymd_opt(2015, 6, 3).unwrap(); |
2c00a5a8 XL |
740 | /// assert!(d.and_hms_opt(12, 34, 56).is_some()); |
741 | /// assert!(d.and_hms_opt(12, 34, 60).is_none()); // use `and_hms_milli_opt` instead | |
742 | /// assert!(d.and_hms_opt(12, 60, 56).is_none()); | |
743 | /// assert!(d.and_hms_opt(24, 34, 56).is_none()); | |
49aad941 | 744 | /// ``` |
2c00a5a8 XL |
745 | #[inline] |
746 | pub fn and_hms_opt(&self, hour: u32, min: u32, sec: u32) -> Option<NaiveDateTime> { | |
747 | NaiveTime::from_hms_opt(hour, min, sec).map(|time| self.and_time(time)) | |
748 | } | |
749 | ||
750 | /// Makes a new `NaiveDateTime` from the current date, hour, minute, second and millisecond. | |
751 | /// | |
752 | /// The millisecond part can exceed 1,000 | |
753 | /// in order to represent the [leap second](./struct.NaiveTime.html#leap-second-handling). | |
754 | /// | |
755 | /// Panics on invalid hour, minute, second and/or millisecond. | |
49aad941 | 756 | #[deprecated(since = "0.4.23", note = "use `and_hms_milli_opt()` instead")] |
2c00a5a8 XL |
757 | #[inline] |
758 | pub fn and_hms_milli(&self, hour: u32, min: u32, sec: u32, milli: u32) -> NaiveDateTime { | |
759 | self.and_hms_milli_opt(hour, min, sec, milli).expect("invalid time") | |
760 | } | |
761 | ||
762 | /// Makes a new `NaiveDateTime` from the current date, hour, minute, second and millisecond. | |
763 | /// | |
764 | /// The millisecond part can exceed 1,000 | |
765 | /// in order to represent the [leap second](./struct.NaiveTime.html#leap-second-handling). | |
766 | /// | |
767 | /// Returns `None` on invalid hour, minute, second and/or millisecond. | |
768 | /// | |
769 | /// # Example | |
770 | /// | |
49aad941 | 771 | /// ``` |
2c00a5a8 XL |
772 | /// use chrono::NaiveDate; |
773 | /// | |
49aad941 | 774 | /// let d = NaiveDate::from_ymd_opt(2015, 6, 3).unwrap(); |
2c00a5a8 XL |
775 | /// assert!(d.and_hms_milli_opt(12, 34, 56, 789).is_some()); |
776 | /// assert!(d.and_hms_milli_opt(12, 34, 59, 1_789).is_some()); // leap second | |
777 | /// assert!(d.and_hms_milli_opt(12, 34, 59, 2_789).is_none()); | |
778 | /// assert!(d.and_hms_milli_opt(12, 34, 60, 789).is_none()); | |
779 | /// assert!(d.and_hms_milli_opt(12, 60, 56, 789).is_none()); | |
780 | /// assert!(d.and_hms_milli_opt(24, 34, 56, 789).is_none()); | |
49aad941 | 781 | /// ``` |
2c00a5a8 | 782 | #[inline] |
f035d41b XL |
783 | pub fn and_hms_milli_opt( |
784 | &self, | |
785 | hour: u32, | |
786 | min: u32, | |
787 | sec: u32, | |
788 | milli: u32, | |
789 | ) -> Option<NaiveDateTime> { | |
2c00a5a8 XL |
790 | NaiveTime::from_hms_milli_opt(hour, min, sec, milli).map(|time| self.and_time(time)) |
791 | } | |
792 | ||
793 | /// Makes a new `NaiveDateTime` from the current date, hour, minute, second and microsecond. | |
794 | /// | |
795 | /// The microsecond part can exceed 1,000,000 | |
796 | /// in order to represent the [leap second](./struct.NaiveTime.html#leap-second-handling). | |
797 | /// | |
798 | /// Panics on invalid hour, minute, second and/or microsecond. | |
799 | /// | |
800 | /// # Example | |
801 | /// | |
49aad941 | 802 | /// ``` |
2c00a5a8 XL |
803 | /// use chrono::{NaiveDate, NaiveDateTime, Datelike, Timelike, Weekday}; |
804 | /// | |
49aad941 | 805 | /// let d = NaiveDate::from_ymd_opt(2015, 6, 3).unwrap(); |
2c00a5a8 XL |
806 | /// |
807 | /// let dt: NaiveDateTime = d.and_hms_micro(12, 34, 56, 789_012); | |
808 | /// assert_eq!(dt.year(), 2015); | |
809 | /// assert_eq!(dt.weekday(), Weekday::Wed); | |
810 | /// assert_eq!(dt.second(), 56); | |
811 | /// assert_eq!(dt.nanosecond(), 789_012_000); | |
49aad941 FG |
812 | /// ``` |
813 | #[deprecated(since = "0.4.23", note = "use `and_hms_micro_opt()` instead")] | |
2c00a5a8 XL |
814 | #[inline] |
815 | pub fn and_hms_micro(&self, hour: u32, min: u32, sec: u32, micro: u32) -> NaiveDateTime { | |
816 | self.and_hms_micro_opt(hour, min, sec, micro).expect("invalid time") | |
817 | } | |
818 | ||
819 | /// Makes a new `NaiveDateTime` from the current date, hour, minute, second and microsecond. | |
820 | /// | |
821 | /// The microsecond part can exceed 1,000,000 | |
822 | /// in order to represent the [leap second](./struct.NaiveTime.html#leap-second-handling). | |
823 | /// | |
824 | /// Returns `None` on invalid hour, minute, second and/or microsecond. | |
825 | /// | |
826 | /// # Example | |
827 | /// | |
49aad941 | 828 | /// ``` |
2c00a5a8 XL |
829 | /// use chrono::NaiveDate; |
830 | /// | |
49aad941 | 831 | /// let d = NaiveDate::from_ymd_opt(2015, 6, 3).unwrap(); |
2c00a5a8 XL |
832 | /// assert!(d.and_hms_micro_opt(12, 34, 56, 789_012).is_some()); |
833 | /// assert!(d.and_hms_micro_opt(12, 34, 59, 1_789_012).is_some()); // leap second | |
834 | /// assert!(d.and_hms_micro_opt(12, 34, 59, 2_789_012).is_none()); | |
835 | /// assert!(d.and_hms_micro_opt(12, 34, 60, 789_012).is_none()); | |
836 | /// assert!(d.and_hms_micro_opt(12, 60, 56, 789_012).is_none()); | |
837 | /// assert!(d.and_hms_micro_opt(24, 34, 56, 789_012).is_none()); | |
49aad941 | 838 | /// ``` |
2c00a5a8 | 839 | #[inline] |
f035d41b XL |
840 | pub fn and_hms_micro_opt( |
841 | &self, | |
842 | hour: u32, | |
843 | min: u32, | |
844 | sec: u32, | |
845 | micro: u32, | |
846 | ) -> Option<NaiveDateTime> { | |
2c00a5a8 XL |
847 | NaiveTime::from_hms_micro_opt(hour, min, sec, micro).map(|time| self.and_time(time)) |
848 | } | |
849 | ||
850 | /// Makes a new `NaiveDateTime` from the current date, hour, minute, second and nanosecond. | |
851 | /// | |
852 | /// The nanosecond part can exceed 1,000,000,000 | |
853 | /// in order to represent the [leap second](./struct.NaiveTime.html#leap-second-handling). | |
854 | /// | |
855 | /// Panics on invalid hour, minute, second and/or nanosecond. | |
49aad941 | 856 | #[deprecated(since = "0.4.23", note = "use `and_hms_nano_opt()` instead")] |
2c00a5a8 XL |
857 | #[inline] |
858 | pub fn and_hms_nano(&self, hour: u32, min: u32, sec: u32, nano: u32) -> NaiveDateTime { | |
859 | self.and_hms_nano_opt(hour, min, sec, nano).expect("invalid time") | |
860 | } | |
861 | ||
862 | /// Makes a new `NaiveDateTime` from the current date, hour, minute, second and nanosecond. | |
863 | /// | |
864 | /// The nanosecond part can exceed 1,000,000,000 | |
865 | /// in order to represent the [leap second](./struct.NaiveTime.html#leap-second-handling). | |
866 | /// | |
867 | /// Returns `None` on invalid hour, minute, second and/or nanosecond. | |
868 | /// | |
869 | /// # Example | |
870 | /// | |
49aad941 | 871 | /// ``` |
2c00a5a8 XL |
872 | /// use chrono::NaiveDate; |
873 | /// | |
49aad941 | 874 | /// let d = NaiveDate::from_ymd_opt(2015, 6, 3).unwrap(); |
2c00a5a8 XL |
875 | /// assert!(d.and_hms_nano_opt(12, 34, 56, 789_012_345).is_some()); |
876 | /// assert!(d.and_hms_nano_opt(12, 34, 59, 1_789_012_345).is_some()); // leap second | |
877 | /// assert!(d.and_hms_nano_opt(12, 34, 59, 2_789_012_345).is_none()); | |
878 | /// assert!(d.and_hms_nano_opt(12, 34, 60, 789_012_345).is_none()); | |
879 | /// assert!(d.and_hms_nano_opt(12, 60, 56, 789_012_345).is_none()); | |
880 | /// assert!(d.and_hms_nano_opt(24, 34, 56, 789_012_345).is_none()); | |
49aad941 | 881 | /// ``` |
2c00a5a8 | 882 | #[inline] |
f035d41b XL |
883 | pub fn and_hms_nano_opt( |
884 | &self, | |
885 | hour: u32, | |
886 | min: u32, | |
887 | sec: u32, | |
888 | nano: u32, | |
889 | ) -> Option<NaiveDateTime> { | |
2c00a5a8 XL |
890 | NaiveTime::from_hms_nano_opt(hour, min, sec, nano).map(|time| self.and_time(time)) |
891 | } | |
892 | ||
893 | /// Returns the packed month-day-flags. | |
894 | #[inline] | |
895 | fn mdf(&self) -> Mdf { | |
896 | self.of().to_mdf() | |
897 | } | |
898 | ||
899 | /// Returns the packed ordinal-flags. | |
900 | #[inline] | |
49aad941 | 901 | const fn of(&self) -> Of { |
83c7162d | 902 | Of((self.ymdf & 0b1_1111_1111_1111) as u32) |
2c00a5a8 XL |
903 | } |
904 | ||
905 | /// Makes a new `NaiveDate` with the packed month-day-flags changed. | |
906 | /// | |
907 | /// Returns `None` when the resulting `NaiveDate` would be invalid. | |
908 | #[inline] | |
909 | fn with_mdf(&self, mdf: Mdf) -> Option<NaiveDate> { | |
910 | self.with_of(mdf.to_of()) | |
911 | } | |
912 | ||
913 | /// Makes a new `NaiveDate` with the packed ordinal-flags changed. | |
914 | /// | |
915 | /// Returns `None` when the resulting `NaiveDate` would be invalid. | |
916 | #[inline] | |
917 | fn with_of(&self, of: Of) -> Option<NaiveDate> { | |
918 | if of.valid() { | |
919 | let Of(of) = of; | |
83c7162d | 920 | Some(NaiveDate { ymdf: (self.ymdf & !0b1_1111_1111_1111) | of as DateImpl }) |
2c00a5a8 XL |
921 | } else { |
922 | None | |
923 | } | |
924 | } | |
925 | ||
926 | /// Makes a new `NaiveDate` for the next calendar date. | |
927 | /// | |
928 | /// Panics when `self` is the last representable date. | |
49aad941 | 929 | #[deprecated(since = "0.4.23", note = "use `succ_opt()` instead")] |
2c00a5a8 XL |
930 | #[inline] |
931 | pub fn succ(&self) -> NaiveDate { | |
932 | self.succ_opt().expect("out of bound") | |
933 | } | |
934 | ||
935 | /// Makes a new `NaiveDate` for the next calendar date. | |
936 | /// | |
937 | /// Returns `None` when `self` is the last representable date. | |
938 | /// | |
939 | /// # Example | |
940 | /// | |
49aad941 | 941 | /// ``` |
2c00a5a8 | 942 | /// use chrono::NaiveDate; |
2c00a5a8 | 943 | /// |
49aad941 FG |
944 | /// assert_eq!(NaiveDate::from_ymd_opt(2015, 6, 3).unwrap().succ_opt(), |
945 | /// Some(NaiveDate::from_ymd_opt(2015, 6, 4).unwrap())); | |
946 | /// assert_eq!(NaiveDate::MAX.succ_opt(), None); | |
947 | /// ``` | |
2c00a5a8 XL |
948 | #[inline] |
949 | pub fn succ_opt(&self) -> Option<NaiveDate> { | |
950 | self.with_of(self.of().succ()).or_else(|| NaiveDate::from_ymd_opt(self.year() + 1, 1, 1)) | |
951 | } | |
952 | ||
953 | /// Makes a new `NaiveDate` for the previous calendar date. | |
954 | /// | |
955 | /// Panics when `self` is the first representable date. | |
49aad941 | 956 | #[deprecated(since = "0.4.23", note = "use `pred_opt()` instead")] |
2c00a5a8 XL |
957 | #[inline] |
958 | pub fn pred(&self) -> NaiveDate { | |
959 | self.pred_opt().expect("out of bound") | |
960 | } | |
961 | ||
962 | /// Makes a new `NaiveDate` for the previous calendar date. | |
963 | /// | |
964 | /// Returns `None` when `self` is the first representable date. | |
965 | /// | |
966 | /// # Example | |
967 | /// | |
49aad941 | 968 | /// ``` |
2c00a5a8 | 969 | /// use chrono::NaiveDate; |
2c00a5a8 | 970 | /// |
49aad941 FG |
971 | /// assert_eq!(NaiveDate::from_ymd_opt(2015, 6, 3).unwrap().pred_opt(), |
972 | /// Some(NaiveDate::from_ymd_opt(2015, 6, 2).unwrap())); | |
973 | /// assert_eq!(NaiveDate::MIN.pred_opt(), None); | |
974 | /// ``` | |
2c00a5a8 XL |
975 | #[inline] |
976 | pub fn pred_opt(&self) -> Option<NaiveDate> { | |
977 | self.with_of(self.of().pred()).or_else(|| NaiveDate::from_ymd_opt(self.year() - 1, 12, 31)) | |
978 | } | |
979 | ||
980 | /// Adds the `days` part of given `Duration` to the current date. | |
981 | /// | |
982 | /// Returns `None` when it will result in overflow. | |
983 | /// | |
984 | /// # Example | |
985 | /// | |
49aad941 | 986 | /// ``` |
5869c6ff | 987 | /// use chrono::{Duration, NaiveDate}; |
2c00a5a8 | 988 | /// |
49aad941 | 989 | /// let d = NaiveDate::from_ymd_opt(2015, 9, 5).unwrap(); |
2c00a5a8 | 990 | /// assert_eq!(d.checked_add_signed(Duration::days(40)), |
49aad941 | 991 | /// Some(NaiveDate::from_ymd_opt(2015, 10, 15).unwrap())); |
2c00a5a8 | 992 | /// assert_eq!(d.checked_add_signed(Duration::days(-40)), |
49aad941 | 993 | /// Some(NaiveDate::from_ymd_opt(2015, 7, 27).unwrap())); |
2c00a5a8 XL |
994 | /// assert_eq!(d.checked_add_signed(Duration::days(1_000_000_000)), None); |
995 | /// assert_eq!(d.checked_add_signed(Duration::days(-1_000_000_000)), None); | |
49aad941 FG |
996 | /// assert_eq!(NaiveDate::MAX.checked_add_signed(Duration::days(1)), None); |
997 | /// ``` | |
2c00a5a8 XL |
998 | pub fn checked_add_signed(self, rhs: OldDuration) -> Option<NaiveDate> { |
999 | let year = self.year(); | |
1000 | let (mut year_div_400, year_mod_400) = div_mod_floor(year, 400); | |
1001 | let cycle = internals::yo_to_cycle(year_mod_400 as u32, self.of().ordinal()); | |
49aad941 | 1002 | let cycle = (cycle as i32).checked_add(rhs.num_days().to_i32()?)?; |
83c7162d | 1003 | let (cycle_div_400y, cycle) = div_mod_floor(cycle, 146_097); |
2c00a5a8 XL |
1004 | year_div_400 += cycle_div_400y; |
1005 | ||
1006 | let (year_mod_400, ordinal) = internals::cycle_to_yo(cycle as u32); | |
1007 | let flags = YearFlags::from_year_mod_400(year_mod_400 as i32); | |
49aad941 | 1008 | NaiveDate::from_of(year_div_400 * 400 + year_mod_400 as i32, Of::new(ordinal, flags)?) |
2c00a5a8 XL |
1009 | } |
1010 | ||
1011 | /// Subtracts the `days` part of given `Duration` from the current date. | |
1012 | /// | |
1013 | /// Returns `None` when it will result in overflow. | |
1014 | /// | |
1015 | /// # Example | |
1016 | /// | |
49aad941 | 1017 | /// ``` |
5869c6ff | 1018 | /// use chrono::{Duration, NaiveDate}; |
2c00a5a8 | 1019 | /// |
49aad941 | 1020 | /// let d = NaiveDate::from_ymd_opt(2015, 9, 5).unwrap(); |
2c00a5a8 | 1021 | /// assert_eq!(d.checked_sub_signed(Duration::days(40)), |
49aad941 | 1022 | /// Some(NaiveDate::from_ymd_opt(2015, 7, 27).unwrap())); |
2c00a5a8 | 1023 | /// assert_eq!(d.checked_sub_signed(Duration::days(-40)), |
49aad941 | 1024 | /// Some(NaiveDate::from_ymd_opt(2015, 10, 15).unwrap())); |
2c00a5a8 XL |
1025 | /// assert_eq!(d.checked_sub_signed(Duration::days(1_000_000_000)), None); |
1026 | /// assert_eq!(d.checked_sub_signed(Duration::days(-1_000_000_000)), None); | |
49aad941 FG |
1027 | /// assert_eq!(NaiveDate::MIN.checked_sub_signed(Duration::days(1)), None); |
1028 | /// ``` | |
2c00a5a8 XL |
1029 | pub fn checked_sub_signed(self, rhs: OldDuration) -> Option<NaiveDate> { |
1030 | let year = self.year(); | |
1031 | let (mut year_div_400, year_mod_400) = div_mod_floor(year, 400); | |
1032 | let cycle = internals::yo_to_cycle(year_mod_400 as u32, self.of().ordinal()); | |
49aad941 | 1033 | let cycle = (cycle as i32).checked_sub(rhs.num_days().to_i32()?)?; |
83c7162d | 1034 | let (cycle_div_400y, cycle) = div_mod_floor(cycle, 146_097); |
2c00a5a8 XL |
1035 | year_div_400 += cycle_div_400y; |
1036 | ||
1037 | let (year_mod_400, ordinal) = internals::cycle_to_yo(cycle as u32); | |
1038 | let flags = YearFlags::from_year_mod_400(year_mod_400 as i32); | |
49aad941 | 1039 | NaiveDate::from_of(year_div_400 * 400 + year_mod_400 as i32, Of::new(ordinal, flags)?) |
2c00a5a8 XL |
1040 | } |
1041 | ||
1042 | /// Subtracts another `NaiveDate` from the current date. | |
1043 | /// Returns a `Duration` of integral numbers. | |
1044 | /// | |
1045 | /// This does not overflow or underflow at all, | |
1046 | /// as all possible output fits in the range of `Duration`. | |
1047 | /// | |
1048 | /// # Example | |
1049 | /// | |
49aad941 | 1050 | /// ``` |
5869c6ff | 1051 | /// use chrono::{Duration, NaiveDate}; |
2c00a5a8 XL |
1052 | /// |
1053 | /// let from_ymd = NaiveDate::from_ymd; | |
1054 | /// let since = NaiveDate::signed_duration_since; | |
1055 | /// | |
1056 | /// assert_eq!(since(from_ymd(2014, 1, 1), from_ymd(2014, 1, 1)), Duration::zero()); | |
1057 | /// assert_eq!(since(from_ymd(2014, 1, 1), from_ymd(2013, 12, 31)), Duration::days(1)); | |
1058 | /// assert_eq!(since(from_ymd(2014, 1, 1), from_ymd(2014, 1, 2)), Duration::days(-1)); | |
1059 | /// assert_eq!(since(from_ymd(2014, 1, 1), from_ymd(2013, 9, 23)), Duration::days(100)); | |
1060 | /// assert_eq!(since(from_ymd(2014, 1, 1), from_ymd(2013, 1, 1)), Duration::days(365)); | |
1061 | /// assert_eq!(since(from_ymd(2014, 1, 1), from_ymd(2010, 1, 1)), Duration::days(365*4 + 1)); | |
1062 | /// assert_eq!(since(from_ymd(2014, 1, 1), from_ymd(1614, 1, 1)), Duration::days(365*400 + 97)); | |
49aad941 | 1063 | /// ``` |
2c00a5a8 XL |
1064 | pub fn signed_duration_since(self, rhs: NaiveDate) -> OldDuration { |
1065 | let year1 = self.year(); | |
1066 | let year2 = rhs.year(); | |
1067 | let (year1_div_400, year1_mod_400) = div_mod_floor(year1, 400); | |
1068 | let (year2_div_400, year2_mod_400) = div_mod_floor(year2, 400); | |
83c7162d XL |
1069 | let cycle1 = i64::from(internals::yo_to_cycle(year1_mod_400 as u32, self.of().ordinal())); |
1070 | let cycle2 = i64::from(internals::yo_to_cycle(year2_mod_400 as u32, rhs.of().ordinal())); | |
f035d41b XL |
1071 | OldDuration::days( |
1072 | (i64::from(year1_div_400) - i64::from(year2_div_400)) * 146_097 + (cycle1 - cycle2), | |
1073 | ) | |
2c00a5a8 XL |
1074 | } |
1075 | ||
49aad941 FG |
1076 | /// Returns the number of whole years from the given `base` until `self`. |
1077 | pub fn years_since(&self, base: Self) -> Option<u32> { | |
1078 | let mut years = self.year() - base.year(); | |
1079 | if (self.month(), self.day()) < (base.month(), base.day()) { | |
1080 | years -= 1; | |
1081 | } | |
1082 | ||
1083 | match years >= 0 { | |
1084 | true => Some(years as u32), | |
1085 | false => None, | |
1086 | } | |
1087 | } | |
1088 | ||
2c00a5a8 | 1089 | /// Formats the date with the specified formatting items. |
f035d41b | 1090 | /// Otherwise it is the same as the ordinary `format` method. |
2c00a5a8 XL |
1091 | /// |
1092 | /// The `Iterator` of items should be `Clone`able, | |
1093 | /// since the resulting `DelayedFormat` value may be formatted multiple times. | |
1094 | /// | |
1095 | /// # Example | |
1096 | /// | |
49aad941 | 1097 | /// ``` |
2c00a5a8 XL |
1098 | /// use chrono::NaiveDate; |
1099 | /// use chrono::format::strftime::StrftimeItems; | |
1100 | /// | |
1101 | /// let fmt = StrftimeItems::new("%Y-%m-%d"); | |
49aad941 | 1102 | /// let d = NaiveDate::from_ymd_opt(2015, 9, 5).unwrap(); |
2c00a5a8 XL |
1103 | /// assert_eq!(d.format_with_items(fmt.clone()).to_string(), "2015-09-05"); |
1104 | /// assert_eq!(d.format("%Y-%m-%d").to_string(), "2015-09-05"); | |
49aad941 | 1105 | /// ``` |
2c00a5a8 XL |
1106 | /// |
1107 | /// The resulting `DelayedFormat` can be formatted directly via the `Display` trait. | |
1108 | /// | |
49aad941 | 1109 | /// ``` |
2c00a5a8 XL |
1110 | /// # use chrono::NaiveDate; |
1111 | /// # use chrono::format::strftime::StrftimeItems; | |
1112 | /// # let fmt = StrftimeItems::new("%Y-%m-%d").clone(); | |
49aad941 | 1113 | /// # let d = NaiveDate::from_ymd_opt(2015, 9, 5).unwrap(); |
2c00a5a8 | 1114 | /// assert_eq!(format!("{}", d.format_with_items(fmt)), "2015-09-05"); |
49aad941 | 1115 | /// ``` |
f035d41b | 1116 | #[cfg(any(feature = "alloc", feature = "std", test))] |
49aad941 | 1117 | #[cfg_attr(docsrs, doc(cfg(any(feature = "alloc", feature = "std"))))] |
2c00a5a8 | 1118 | #[inline] |
f035d41b XL |
1119 | pub fn format_with_items<'a, I, B>(&self, items: I) -> DelayedFormat<I> |
1120 | where | |
1121 | I: Iterator<Item = B> + Clone, | |
1122 | B: Borrow<Item<'a>>, | |
1123 | { | |
2c00a5a8 XL |
1124 | DelayedFormat::new(Some(*self), None, items) |
1125 | } | |
1126 | ||
1127 | /// Formats the date with the specified format string. | |
1128 | /// See the [`format::strftime` module](../format/strftime/index.html) | |
1129 | /// on the supported escape sequences. | |
1130 | /// | |
1131 | /// This returns a `DelayedFormat`, | |
1132 | /// which gets converted to a string only when actual formatting happens. | |
1133 | /// You may use the `to_string` method to get a `String`, | |
1134 | /// or just feed it into `print!` and other formatting macros. | |
1135 | /// (In this way it avoids the redundant memory allocation.) | |
1136 | /// | |
1137 | /// A wrong format string does *not* issue an error immediately. | |
1138 | /// Rather, converting or formatting the `DelayedFormat` fails. | |
1139 | /// You are recommended to immediately use `DelayedFormat` for this reason. | |
1140 | /// | |
1141 | /// # Example | |
1142 | /// | |
49aad941 | 1143 | /// ``` |
2c00a5a8 XL |
1144 | /// use chrono::NaiveDate; |
1145 | /// | |
49aad941 | 1146 | /// let d = NaiveDate::from_ymd_opt(2015, 9, 5).unwrap(); |
2c00a5a8 XL |
1147 | /// assert_eq!(d.format("%Y-%m-%d").to_string(), "2015-09-05"); |
1148 | /// assert_eq!(d.format("%A, %-d %B, %C%y").to_string(), "Saturday, 5 September, 2015"); | |
49aad941 | 1149 | /// ``` |
2c00a5a8 XL |
1150 | /// |
1151 | /// The resulting `DelayedFormat` can be formatted directly via the `Display` trait. | |
1152 | /// | |
49aad941 | 1153 | /// ``` |
2c00a5a8 | 1154 | /// # use chrono::NaiveDate; |
49aad941 | 1155 | /// # let d = NaiveDate::from_ymd_opt(2015, 9, 5).unwrap(); |
2c00a5a8 XL |
1156 | /// assert_eq!(format!("{}", d.format("%Y-%m-%d")), "2015-09-05"); |
1157 | /// assert_eq!(format!("{}", d.format("%A, %-d %B, %C%y")), "Saturday, 5 September, 2015"); | |
49aad941 | 1158 | /// ``` |
f035d41b | 1159 | #[cfg(any(feature = "alloc", feature = "std", test))] |
49aad941 | 1160 | #[cfg_attr(docsrs, doc(cfg(any(feature = "alloc", feature = "std"))))] |
2c00a5a8 XL |
1161 | #[inline] |
1162 | pub fn format<'a>(&self, fmt: &'a str) -> DelayedFormat<StrftimeItems<'a>> { | |
1163 | self.format_with_items(StrftimeItems::new(fmt)) | |
1164 | } | |
3dfed10e | 1165 | |
49aad941 FG |
1166 | /// Formats the date with the specified formatting items and locale. |
1167 | #[cfg(feature = "unstable-locales")] | |
1168 | #[cfg_attr(docsrs, doc(cfg(feature = "unstable-locales")))] | |
1169 | #[inline] | |
1170 | pub fn format_localized_with_items<'a, I, B>( | |
1171 | &self, | |
1172 | items: I, | |
1173 | locale: Locale, | |
1174 | ) -> DelayedFormat<I> | |
1175 | where | |
1176 | I: Iterator<Item = B> + Clone, | |
1177 | B: Borrow<Item<'a>>, | |
1178 | { | |
1179 | DelayedFormat::new_with_locale(Some(*self), None, items, locale) | |
1180 | } | |
1181 | ||
1182 | /// Formats the date with the specified format string and locale. | |
1183 | /// | |
1184 | /// See the [`crate::format::strftime`] module on the supported escape | |
1185 | /// sequences. | |
1186 | #[cfg(feature = "unstable-locales")] | |
1187 | #[cfg_attr(docsrs, doc(cfg(feature = "unstable-locales")))] | |
1188 | #[inline] | |
1189 | pub fn format_localized<'a>( | |
1190 | &self, | |
1191 | fmt: &'a str, | |
1192 | locale: Locale, | |
1193 | ) -> DelayedFormat<StrftimeItems<'a>> { | |
1194 | self.format_localized_with_items(StrftimeItems::new_with_locale(fmt, locale), locale) | |
1195 | } | |
1196 | ||
1197 | /// Returns an iterator that steps by days across all representable dates. | |
3dfed10e XL |
1198 | /// |
1199 | /// # Example | |
1200 | /// | |
1201 | /// ``` | |
1202 | /// # use chrono::NaiveDate; | |
1203 | /// | |
1204 | /// let expected = [ | |
49aad941 FG |
1205 | /// NaiveDate::from_ymd_opt(2016, 2, 27).unwrap(), |
1206 | /// NaiveDate::from_ymd_opt(2016, 2, 28).unwrap(), | |
1207 | /// NaiveDate::from_ymd_opt(2016, 2, 29).unwrap(), | |
1208 | /// NaiveDate::from_ymd_opt(2016, 3, 1).unwrap(), | |
3dfed10e XL |
1209 | /// ]; |
1210 | /// | |
1211 | /// let mut count = 0; | |
49aad941 | 1212 | /// for (idx, d) in NaiveDate::from_ymd_opt(2016, 2, 27).unwrap().iter_days().take(4).enumerate() { |
3dfed10e XL |
1213 | /// assert_eq!(d, expected[idx]); |
1214 | /// count += 1; | |
1215 | /// } | |
1216 | /// assert_eq!(count, 4); | |
49aad941 FG |
1217 | /// |
1218 | /// for d in NaiveDate::from_ymd_opt(2016, 3, 1).unwrap().iter_days().rev().take(4) { | |
1219 | /// count -= 1; | |
1220 | /// assert_eq!(d, expected[count]); | |
1221 | /// } | |
3dfed10e XL |
1222 | /// ``` |
1223 | #[inline] | |
49aad941 | 1224 | pub const fn iter_days(&self) -> NaiveDateDaysIterator { |
3dfed10e XL |
1225 | NaiveDateDaysIterator { value: *self } |
1226 | } | |
1227 | ||
49aad941 | 1228 | /// Returns an iterator that steps by weeks across all representable dates. |
3dfed10e XL |
1229 | /// |
1230 | /// # Example | |
1231 | /// | |
1232 | /// ``` | |
1233 | /// # use chrono::NaiveDate; | |
1234 | /// | |
1235 | /// let expected = [ | |
49aad941 FG |
1236 | /// NaiveDate::from_ymd_opt(2016, 2, 27).unwrap(), |
1237 | /// NaiveDate::from_ymd_opt(2016, 3, 5).unwrap(), | |
1238 | /// NaiveDate::from_ymd_opt(2016, 3, 12).unwrap(), | |
1239 | /// NaiveDate::from_ymd_opt(2016, 3, 19).unwrap(), | |
3dfed10e XL |
1240 | /// ]; |
1241 | /// | |
1242 | /// let mut count = 0; | |
49aad941 | 1243 | /// for (idx, d) in NaiveDate::from_ymd_opt(2016, 2, 27).unwrap().iter_weeks().take(4).enumerate() { |
3dfed10e XL |
1244 | /// assert_eq!(d, expected[idx]); |
1245 | /// count += 1; | |
1246 | /// } | |
1247 | /// assert_eq!(count, 4); | |
49aad941 FG |
1248 | /// |
1249 | /// for d in NaiveDate::from_ymd_opt(2016, 3, 19).unwrap().iter_weeks().rev().take(4) { | |
1250 | /// count -= 1; | |
1251 | /// assert_eq!(d, expected[count]); | |
1252 | /// } | |
3dfed10e XL |
1253 | /// ``` |
1254 | #[inline] | |
49aad941 | 1255 | pub const fn iter_weeks(&self) -> NaiveDateWeeksIterator { |
3dfed10e XL |
1256 | NaiveDateWeeksIterator { value: *self } |
1257 | } | |
49aad941 FG |
1258 | |
1259 | /// Returns the [`NaiveWeek`] that the date belongs to, starting with the [`Weekday`] | |
1260 | /// specified. | |
1261 | #[inline] | |
1262 | pub const fn week(&self, start: Weekday) -> NaiveWeek { | |
1263 | NaiveWeek { date: *self, start } | |
1264 | } | |
1265 | ||
1266 | /// The minimum possible `NaiveDate` (January 1, 262145 BCE). | |
1267 | pub const MIN: NaiveDate = NaiveDate { ymdf: (MIN_YEAR << 13) | (1 << 4) | 0o07 /*FE*/ }; | |
1268 | /// The maximum possible `NaiveDate` (December 31, 262143 CE). | |
1269 | pub const MAX: NaiveDate = NaiveDate { ymdf: (MAX_YEAR << 13) | (365 << 4) | 0o17 /*F*/ }; | |
2c00a5a8 XL |
1270 | } |
1271 | ||
1272 | impl Datelike for NaiveDate { | |
1273 | /// Returns the year number in the [calendar date](#calendar-date). | |
1274 | /// | |
1275 | /// # Example | |
1276 | /// | |
49aad941 | 1277 | /// ``` |
2c00a5a8 XL |
1278 | /// use chrono::{NaiveDate, Datelike}; |
1279 | /// | |
49aad941 FG |
1280 | /// assert_eq!(NaiveDate::from_ymd_opt(2015, 9, 8).unwrap().year(), 2015); |
1281 | /// assert_eq!(NaiveDate::from_ymd_opt(-308, 3, 14).unwrap().year(), -308); // 309 BCE | |
1282 | /// ``` | |
2c00a5a8 XL |
1283 | #[inline] |
1284 | fn year(&self) -> i32 { | |
1285 | self.ymdf >> 13 | |
1286 | } | |
1287 | ||
1288 | /// Returns the month number starting from 1. | |
1289 | /// | |
1290 | /// The return value ranges from 1 to 12. | |
1291 | /// | |
1292 | /// # Example | |
1293 | /// | |
49aad941 | 1294 | /// ``` |
2c00a5a8 XL |
1295 | /// use chrono::{NaiveDate, Datelike}; |
1296 | /// | |
49aad941 FG |
1297 | /// assert_eq!(NaiveDate::from_ymd_opt(2015, 9, 8).unwrap().month(), 9); |
1298 | /// assert_eq!(NaiveDate::from_ymd_opt(-308, 3, 14).unwrap().month(), 3); | |
1299 | /// ``` | |
2c00a5a8 XL |
1300 | #[inline] |
1301 | fn month(&self) -> u32 { | |
1302 | self.mdf().month() | |
1303 | } | |
1304 | ||
1305 | /// Returns the month number starting from 0. | |
1306 | /// | |
1307 | /// The return value ranges from 0 to 11. | |
1308 | /// | |
1309 | /// # Example | |
1310 | /// | |
49aad941 | 1311 | /// ``` |
2c00a5a8 XL |
1312 | /// use chrono::{NaiveDate, Datelike}; |
1313 | /// | |
49aad941 FG |
1314 | /// assert_eq!(NaiveDate::from_ymd_opt(2015, 9, 8).unwrap().month0(), 8); |
1315 | /// assert_eq!(NaiveDate::from_ymd_opt(-308, 3, 14).unwrap().month0(), 2); | |
1316 | /// ``` | |
2c00a5a8 XL |
1317 | #[inline] |
1318 | fn month0(&self) -> u32 { | |
1319 | self.mdf().month() - 1 | |
1320 | } | |
1321 | ||
1322 | /// Returns the day of month starting from 1. | |
1323 | /// | |
1324 | /// The return value ranges from 1 to 31. (The last day of month differs by months.) | |
1325 | /// | |
1326 | /// # Example | |
1327 | /// | |
49aad941 | 1328 | /// ``` |
2c00a5a8 XL |
1329 | /// use chrono::{NaiveDate, Datelike}; |
1330 | /// | |
49aad941 FG |
1331 | /// assert_eq!(NaiveDate::from_ymd_opt(2015, 9, 8).unwrap().day(), 8); |
1332 | /// assert_eq!(NaiveDate::from_ymd_opt(-308, 3, 14).unwrap().day(), 14); | |
1333 | /// ``` | |
2c00a5a8 XL |
1334 | /// |
1335 | /// Combined with [`NaiveDate::pred`](#method.pred), | |
1336 | /// one can determine the number of days in a particular month. | |
1337 | /// (Note that this panics when `year` is out of range.) | |
1338 | /// | |
49aad941 | 1339 | /// ``` |
2c00a5a8 XL |
1340 | /// use chrono::{NaiveDate, Datelike}; |
1341 | /// | |
1342 | /// fn ndays_in_month(year: i32, month: u32) -> u32 { | |
1343 | /// // the first day of the next month... | |
1344 | /// let (y, m) = if month == 12 { (year + 1, 1) } else { (year, month + 1) }; | |
49aad941 | 1345 | /// let d = NaiveDate::from_ymd_opt(y, m, 1).unwrap(); |
2c00a5a8 XL |
1346 | /// |
1347 | /// // ...is preceded by the last day of the original month | |
1348 | /// d.pred().day() | |
1349 | /// } | |
1350 | /// | |
1351 | /// assert_eq!(ndays_in_month(2015, 8), 31); | |
1352 | /// assert_eq!(ndays_in_month(2015, 9), 30); | |
1353 | /// assert_eq!(ndays_in_month(2015, 12), 31); | |
1354 | /// assert_eq!(ndays_in_month(2016, 2), 29); | |
1355 | /// assert_eq!(ndays_in_month(2017, 2), 28); | |
49aad941 | 1356 | /// ``` |
2c00a5a8 XL |
1357 | #[inline] |
1358 | fn day(&self) -> u32 { | |
1359 | self.mdf().day() | |
1360 | } | |
1361 | ||
1362 | /// Returns the day of month starting from 0. | |
1363 | /// | |
1364 | /// The return value ranges from 0 to 30. (The last day of month differs by months.) | |
1365 | /// | |
1366 | /// # Example | |
1367 | /// | |
49aad941 | 1368 | /// ``` |
2c00a5a8 XL |
1369 | /// use chrono::{NaiveDate, Datelike}; |
1370 | /// | |
49aad941 FG |
1371 | /// assert_eq!(NaiveDate::from_ymd_opt(2015, 9, 8).unwrap().day0(), 7); |
1372 | /// assert_eq!(NaiveDate::from_ymd_opt(-308, 3, 14).unwrap().day0(), 13); | |
1373 | /// ``` | |
2c00a5a8 XL |
1374 | #[inline] |
1375 | fn day0(&self) -> u32 { | |
1376 | self.mdf().day() - 1 | |
1377 | } | |
1378 | ||
1379 | /// Returns the day of year starting from 1. | |
1380 | /// | |
1381 | /// The return value ranges from 1 to 366. (The last day of year differs by years.) | |
1382 | /// | |
1383 | /// # Example | |
1384 | /// | |
49aad941 | 1385 | /// ``` |
2c00a5a8 XL |
1386 | /// use chrono::{NaiveDate, Datelike}; |
1387 | /// | |
49aad941 FG |
1388 | /// assert_eq!(NaiveDate::from_ymd_opt(2015, 9, 8).unwrap().ordinal(), 251); |
1389 | /// assert_eq!(NaiveDate::from_ymd_opt(-308, 3, 14).unwrap().ordinal(), 74); | |
1390 | /// ``` | |
2c00a5a8 XL |
1391 | /// |
1392 | /// Combined with [`NaiveDate::pred`](#method.pred), | |
1393 | /// one can determine the number of days in a particular year. | |
1394 | /// (Note that this panics when `year` is out of range.) | |
1395 | /// | |
49aad941 | 1396 | /// ``` |
2c00a5a8 XL |
1397 | /// use chrono::{NaiveDate, Datelike}; |
1398 | /// | |
1399 | /// fn ndays_in_year(year: i32) -> u32 { | |
1400 | /// // the first day of the next year... | |
49aad941 | 1401 | /// let d = NaiveDate::from_ymd_opt(year + 1, 1, 1).unwrap(); |
2c00a5a8 XL |
1402 | /// |
1403 | /// // ...is preceded by the last day of the original year | |
1404 | /// d.pred().ordinal() | |
1405 | /// } | |
1406 | /// | |
1407 | /// assert_eq!(ndays_in_year(2015), 365); | |
1408 | /// assert_eq!(ndays_in_year(2016), 366); | |
1409 | /// assert_eq!(ndays_in_year(2017), 365); | |
1410 | /// assert_eq!(ndays_in_year(2000), 366); | |
1411 | /// assert_eq!(ndays_in_year(2100), 365); | |
49aad941 | 1412 | /// ``` |
2c00a5a8 XL |
1413 | #[inline] |
1414 | fn ordinal(&self) -> u32 { | |
1415 | self.of().ordinal() | |
1416 | } | |
1417 | ||
1418 | /// Returns the day of year starting from 0. | |
1419 | /// | |
1420 | /// The return value ranges from 0 to 365. (The last day of year differs by years.) | |
1421 | /// | |
1422 | /// # Example | |
1423 | /// | |
49aad941 | 1424 | /// ``` |
2c00a5a8 XL |
1425 | /// use chrono::{NaiveDate, Datelike}; |
1426 | /// | |
49aad941 FG |
1427 | /// assert_eq!(NaiveDate::from_ymd_opt(2015, 9, 8).unwrap().ordinal0(), 250); |
1428 | /// assert_eq!(NaiveDate::from_ymd_opt(-308, 3, 14).unwrap().ordinal0(), 73); | |
1429 | /// ``` | |
2c00a5a8 XL |
1430 | #[inline] |
1431 | fn ordinal0(&self) -> u32 { | |
1432 | self.of().ordinal() - 1 | |
1433 | } | |
1434 | ||
1435 | /// Returns the day of week. | |
1436 | /// | |
1437 | /// # Example | |
1438 | /// | |
49aad941 | 1439 | /// ``` |
2c00a5a8 XL |
1440 | /// use chrono::{NaiveDate, Datelike, Weekday}; |
1441 | /// | |
49aad941 FG |
1442 | /// assert_eq!(NaiveDate::from_ymd_opt(2015, 9, 8).unwrap().weekday(), Weekday::Tue); |
1443 | /// assert_eq!(NaiveDate::from_ymd_opt(-308, 3, 14).unwrap().weekday(), Weekday::Fri); | |
1444 | /// ``` | |
2c00a5a8 XL |
1445 | #[inline] |
1446 | fn weekday(&self) -> Weekday { | |
1447 | self.of().weekday() | |
1448 | } | |
1449 | ||
1450 | #[inline] | |
1451 | fn iso_week(&self) -> IsoWeek { | |
1452 | isoweek::iso_week_from_yof(self.year(), self.of()) | |
1453 | } | |
1454 | ||
1455 | /// Makes a new `NaiveDate` with the year number changed. | |
1456 | /// | |
1457 | /// Returns `None` when the resulting `NaiveDate` would be invalid. | |
1458 | /// | |
1459 | /// # Example | |
1460 | /// | |
49aad941 | 1461 | /// ``` |
2c00a5a8 XL |
1462 | /// use chrono::{NaiveDate, Datelike}; |
1463 | /// | |
49aad941 FG |
1464 | /// assert_eq!(NaiveDate::from_ymd_opt(2015, 9, 8).unwrap().with_year(2016), |
1465 | /// Some(NaiveDate::from_ymd_opt(2016, 9, 8).unwrap())); | |
1466 | /// assert_eq!(NaiveDate::from_ymd_opt(2015, 9, 8).unwrap().with_year(-308), | |
1467 | /// Some(NaiveDate::from_ymd_opt(-308, 9, 8).unwrap())); | |
1468 | /// ``` | |
2c00a5a8 XL |
1469 | /// |
1470 | /// A leap day (February 29) is a good example that this method can return `None`. | |
1471 | /// | |
49aad941 | 1472 | /// ``` |
2c00a5a8 | 1473 | /// # use chrono::{NaiveDate, Datelike}; |
49aad941 FG |
1474 | /// assert!(NaiveDate::from_ymd_opt(2016, 2, 29).unwrap().with_year(2015).is_none()); |
1475 | /// assert!(NaiveDate::from_ymd_opt(2016, 2, 29).unwrap().with_year(2020).is_some()); | |
1476 | /// ``` | |
2c00a5a8 XL |
1477 | #[inline] |
1478 | fn with_year(&self, year: i32) -> Option<NaiveDate> { | |
1479 | // we need to operate with `mdf` since we should keep the month and day number as is | |
1480 | let mdf = self.mdf(); | |
1481 | ||
1482 | // adjust the flags as needed | |
1483 | let flags = YearFlags::from_year(year); | |
1484 | let mdf = mdf.with_flags(flags); | |
1485 | ||
1486 | NaiveDate::from_mdf(year, mdf) | |
1487 | } | |
1488 | ||
1489 | /// Makes a new `NaiveDate` with the month number (starting from 1) changed. | |
1490 | /// | |
1491 | /// Returns `None` when the resulting `NaiveDate` would be invalid. | |
1492 | /// | |
1493 | /// # Example | |
1494 | /// | |
49aad941 | 1495 | /// ``` |
2c00a5a8 XL |
1496 | /// use chrono::{NaiveDate, Datelike}; |
1497 | /// | |
49aad941 FG |
1498 | /// assert_eq!(NaiveDate::from_ymd_opt(2015, 9, 8).unwrap().with_month(10), |
1499 | /// Some(NaiveDate::from_ymd_opt(2015, 10, 8).unwrap())); | |
1500 | /// assert_eq!(NaiveDate::from_ymd_opt(2015, 9, 8).unwrap().with_month(13), None); // no month 13 | |
1501 | /// assert_eq!(NaiveDate::from_ymd_opt(2015, 9, 30).unwrap().with_month(2), None); // no February 30 | |
1502 | /// ``` | |
2c00a5a8 XL |
1503 | #[inline] |
1504 | fn with_month(&self, month: u32) -> Option<NaiveDate> { | |
49aad941 | 1505 | self.with_mdf(self.mdf().with_month(month)?) |
2c00a5a8 XL |
1506 | } |
1507 | ||
1508 | /// Makes a new `NaiveDate` with the month number (starting from 0) changed. | |
1509 | /// | |
1510 | /// Returns `None` when the resulting `NaiveDate` would be invalid. | |
1511 | /// | |
1512 | /// # Example | |
1513 | /// | |
49aad941 | 1514 | /// ``` |
2c00a5a8 XL |
1515 | /// use chrono::{NaiveDate, Datelike}; |
1516 | /// | |
49aad941 FG |
1517 | /// assert_eq!(NaiveDate::from_ymd_opt(2015, 9, 8).unwrap().with_month0(9), |
1518 | /// Some(NaiveDate::from_ymd_opt(2015, 10, 8).unwrap())); | |
1519 | /// assert_eq!(NaiveDate::from_ymd_opt(2015, 9, 8).unwrap().with_month0(12), None); // no month 13 | |
1520 | /// assert_eq!(NaiveDate::from_ymd_opt(2015, 9, 30).unwrap().with_month0(1), None); // no February 30 | |
1521 | /// ``` | |
2c00a5a8 XL |
1522 | #[inline] |
1523 | fn with_month0(&self, month0: u32) -> Option<NaiveDate> { | |
49aad941 | 1524 | self.with_mdf(self.mdf().with_month(month0 + 1)?) |
2c00a5a8 XL |
1525 | } |
1526 | ||
1527 | /// Makes a new `NaiveDate` with the day of month (starting from 1) changed. | |
1528 | /// | |
1529 | /// Returns `None` when the resulting `NaiveDate` would be invalid. | |
1530 | /// | |
1531 | /// # Example | |
1532 | /// | |
49aad941 | 1533 | /// ``` |
2c00a5a8 XL |
1534 | /// use chrono::{NaiveDate, Datelike}; |
1535 | /// | |
49aad941 FG |
1536 | /// assert_eq!(NaiveDate::from_ymd_opt(2015, 9, 8).unwrap().with_day(30), |
1537 | /// Some(NaiveDate::from_ymd_opt(2015, 9, 30).unwrap())); | |
1538 | /// assert_eq!(NaiveDate::from_ymd_opt(2015, 9, 8).unwrap().with_day(31), | |
2c00a5a8 | 1539 | /// None); // no September 31 |
49aad941 | 1540 | /// ``` |
2c00a5a8 XL |
1541 | #[inline] |
1542 | fn with_day(&self, day: u32) -> Option<NaiveDate> { | |
49aad941 | 1543 | self.with_mdf(self.mdf().with_day(day)?) |
2c00a5a8 XL |
1544 | } |
1545 | ||
1546 | /// Makes a new `NaiveDate` with the day of month (starting from 0) changed. | |
1547 | /// | |
1548 | /// Returns `None` when the resulting `NaiveDate` would be invalid. | |
1549 | /// | |
1550 | /// # Example | |
1551 | /// | |
49aad941 | 1552 | /// ``` |
2c00a5a8 XL |
1553 | /// use chrono::{NaiveDate, Datelike}; |
1554 | /// | |
49aad941 FG |
1555 | /// assert_eq!(NaiveDate::from_ymd_opt(2015, 9, 8).unwrap().with_day0(29), |
1556 | /// Some(NaiveDate::from_ymd_opt(2015, 9, 30).unwrap())); | |
1557 | /// assert_eq!(NaiveDate::from_ymd_opt(2015, 9, 8).unwrap().with_day0(30), | |
2c00a5a8 | 1558 | /// None); // no September 31 |
49aad941 | 1559 | /// ``` |
2c00a5a8 XL |
1560 | #[inline] |
1561 | fn with_day0(&self, day0: u32) -> Option<NaiveDate> { | |
49aad941 | 1562 | self.with_mdf(self.mdf().with_day(day0 + 1)?) |
2c00a5a8 XL |
1563 | } |
1564 | ||
1565 | /// Makes a new `NaiveDate` with the day of year (starting from 1) changed. | |
1566 | /// | |
1567 | /// Returns `None` when the resulting `NaiveDate` would be invalid. | |
1568 | /// | |
1569 | /// # Example | |
1570 | /// | |
49aad941 | 1571 | /// ``` |
2c00a5a8 XL |
1572 | /// use chrono::{NaiveDate, Datelike}; |
1573 | /// | |
49aad941 FG |
1574 | /// assert_eq!(NaiveDate::from_ymd_opt(2015, 1, 1).unwrap().with_ordinal(60), |
1575 | /// Some(NaiveDate::from_ymd_opt(2015, 3, 1).unwrap())); | |
1576 | /// assert_eq!(NaiveDate::from_ymd_opt(2015, 1, 1).unwrap().with_ordinal(366), | |
2c00a5a8 XL |
1577 | /// None); // 2015 had only 365 days |
1578 | /// | |
49aad941 FG |
1579 | /// assert_eq!(NaiveDate::from_ymd_opt(2016, 1, 1).unwrap().with_ordinal(60), |
1580 | /// Some(NaiveDate::from_ymd_opt(2016, 2, 29).unwrap())); | |
1581 | /// assert_eq!(NaiveDate::from_ymd_opt(2016, 1, 1).unwrap().with_ordinal(366), | |
1582 | /// Some(NaiveDate::from_ymd_opt(2016, 12, 31).unwrap())); | |
1583 | /// ``` | |
2c00a5a8 XL |
1584 | #[inline] |
1585 | fn with_ordinal(&self, ordinal: u32) -> Option<NaiveDate> { | |
49aad941 | 1586 | self.with_of(self.of().with_ordinal(ordinal)?) |
2c00a5a8 XL |
1587 | } |
1588 | ||
1589 | /// Makes a new `NaiveDate` with the day of year (starting from 0) changed. | |
1590 | /// | |
1591 | /// Returns `None` when the resulting `NaiveDate` would be invalid. | |
1592 | /// | |
1593 | /// # Example | |
1594 | /// | |
49aad941 | 1595 | /// ``` |
2c00a5a8 XL |
1596 | /// use chrono::{NaiveDate, Datelike}; |
1597 | /// | |
49aad941 FG |
1598 | /// assert_eq!(NaiveDate::from_ymd_opt(2015, 1, 1).unwrap().with_ordinal0(59), |
1599 | /// Some(NaiveDate::from_ymd_opt(2015, 3, 1).unwrap())); | |
1600 | /// assert_eq!(NaiveDate::from_ymd_opt(2015, 1, 1).unwrap().with_ordinal0(365), | |
2c00a5a8 XL |
1601 | /// None); // 2015 had only 365 days |
1602 | /// | |
49aad941 FG |
1603 | /// assert_eq!(NaiveDate::from_ymd_opt(2016, 1, 1).unwrap().with_ordinal0(59), |
1604 | /// Some(NaiveDate::from_ymd_opt(2016, 2, 29).unwrap())); | |
1605 | /// assert_eq!(NaiveDate::from_ymd_opt(2016, 1, 1).unwrap().with_ordinal0(365), | |
1606 | /// Some(NaiveDate::from_ymd_opt(2016, 12, 31).unwrap())); | |
1607 | /// ``` | |
2c00a5a8 XL |
1608 | #[inline] |
1609 | fn with_ordinal0(&self, ordinal0: u32) -> Option<NaiveDate> { | |
49aad941 | 1610 | self.with_of(self.of().with_ordinal(ordinal0 + 1)?) |
2c00a5a8 XL |
1611 | } |
1612 | } | |
1613 | ||
2c00a5a8 XL |
1614 | /// An addition of `Duration` to `NaiveDate` discards the fractional days, |
1615 | /// rounding to the closest integral number of days towards `Duration::zero()`. | |
1616 | /// | |
1617 | /// Panics on underflow or overflow. | |
1618 | /// Use [`NaiveDate::checked_add_signed`](#method.checked_add_signed) to detect that. | |
1619 | /// | |
1620 | /// # Example | |
1621 | /// | |
49aad941 | 1622 | /// ``` |
5869c6ff | 1623 | /// use chrono::{Duration, NaiveDate}; |
2c00a5a8 XL |
1624 | /// |
1625 | /// let from_ymd = NaiveDate::from_ymd; | |
1626 | /// | |
1627 | /// assert_eq!(from_ymd(2014, 1, 1) + Duration::zero(), from_ymd(2014, 1, 1)); | |
1628 | /// assert_eq!(from_ymd(2014, 1, 1) + Duration::seconds(86399), from_ymd(2014, 1, 1)); | |
1629 | /// assert_eq!(from_ymd(2014, 1, 1) + Duration::seconds(-86399), from_ymd(2014, 1, 1)); | |
1630 | /// assert_eq!(from_ymd(2014, 1, 1) + Duration::days(1), from_ymd(2014, 1, 2)); | |
1631 | /// assert_eq!(from_ymd(2014, 1, 1) + Duration::days(-1), from_ymd(2013, 12, 31)); | |
1632 | /// assert_eq!(from_ymd(2014, 1, 1) + Duration::days(364), from_ymd(2014, 12, 31)); | |
1633 | /// assert_eq!(from_ymd(2014, 1, 1) + Duration::days(365*4 + 1), from_ymd(2018, 1, 1)); | |
1634 | /// assert_eq!(from_ymd(2014, 1, 1) + Duration::days(365*400 + 97), from_ymd(2414, 1, 1)); | |
49aad941 | 1635 | /// ``` |
2c00a5a8 XL |
1636 | impl Add<OldDuration> for NaiveDate { |
1637 | type Output = NaiveDate; | |
1638 | ||
1639 | #[inline] | |
1640 | fn add(self, rhs: OldDuration) -> NaiveDate { | |
1641 | self.checked_add_signed(rhs).expect("`NaiveDate + Duration` overflowed") | |
1642 | } | |
1643 | } | |
1644 | ||
1645 | impl AddAssign<OldDuration> for NaiveDate { | |
1646 | #[inline] | |
1647 | fn add_assign(&mut self, rhs: OldDuration) { | |
1648 | *self = self.add(rhs); | |
1649 | } | |
1650 | } | |
1651 | ||
49aad941 FG |
1652 | impl Add<Months> for NaiveDate { |
1653 | type Output = NaiveDate; | |
1654 | ||
1655 | /// An addition of months to `NaiveDate` clamped to valid days in resulting month. | |
1656 | /// | |
1657 | /// # Panics | |
1658 | /// | |
1659 | /// Panics if the resulting date would be out of range. | |
1660 | /// | |
1661 | /// # Example | |
1662 | /// | |
1663 | /// ``` | |
1664 | /// use chrono::{Duration, NaiveDate, Months}; | |
1665 | /// | |
1666 | /// let from_ymd = NaiveDate::from_ymd; | |
1667 | /// | |
1668 | /// assert_eq!(from_ymd(2014, 1, 1) + Months::new(1), from_ymd(2014, 2, 1)); | |
1669 | /// assert_eq!(from_ymd(2014, 1, 1) + Months::new(11), from_ymd(2014, 12, 1)); | |
1670 | /// assert_eq!(from_ymd(2014, 1, 1) + Months::new(12), from_ymd(2015, 1, 1)); | |
1671 | /// assert_eq!(from_ymd(2014, 1, 1) + Months::new(13), from_ymd(2015, 2, 1)); | |
1672 | /// assert_eq!(from_ymd(2014, 1, 31) + Months::new(1), from_ymd(2014, 2, 28)); | |
1673 | /// assert_eq!(from_ymd(2020, 1, 31) + Months::new(1), from_ymd(2020, 2, 29)); | |
1674 | /// ``` | |
1675 | fn add(self, months: Months) -> Self::Output { | |
1676 | self.checked_add_months(months).unwrap() | |
1677 | } | |
1678 | } | |
1679 | ||
1680 | impl Sub<Months> for NaiveDate { | |
1681 | type Output = NaiveDate; | |
1682 | ||
1683 | /// A subtraction of Months from `NaiveDate` clamped to valid days in resulting month. | |
1684 | /// | |
1685 | /// # Panics | |
1686 | /// | |
1687 | /// Panics if the resulting date would be out of range. | |
1688 | /// | |
1689 | /// # Example | |
1690 | /// | |
1691 | /// ``` | |
1692 | /// use chrono::{Duration, NaiveDate, Months}; | |
1693 | /// | |
1694 | /// let from_ymd = NaiveDate::from_ymd; | |
1695 | /// | |
1696 | /// assert_eq!(from_ymd(2014, 1, 1) - Months::new(11), from_ymd(2013, 2, 1)); | |
1697 | /// assert_eq!(from_ymd(2014, 1, 1) - Months::new(12), from_ymd(2013, 1, 1)); | |
1698 | /// assert_eq!(from_ymd(2014, 1, 1) - Months::new(13), from_ymd(2012, 12, 1)); | |
1699 | /// ``` | |
1700 | fn sub(self, months: Months) -> Self::Output { | |
1701 | self.checked_sub_months(months).unwrap() | |
1702 | } | |
1703 | } | |
1704 | ||
1705 | impl Add<Days> for NaiveDate { | |
1706 | type Output = NaiveDate; | |
1707 | ||
1708 | fn add(self, days: Days) -> Self::Output { | |
1709 | self.checked_add_days(days).unwrap() | |
1710 | } | |
1711 | } | |
1712 | ||
1713 | impl Sub<Days> for NaiveDate { | |
1714 | type Output = NaiveDate; | |
1715 | ||
1716 | fn sub(self, days: Days) -> Self::Output { | |
1717 | self.checked_sub_days(days).unwrap() | |
1718 | } | |
1719 | } | |
1720 | ||
2c00a5a8 XL |
1721 | /// A subtraction of `Duration` from `NaiveDate` discards the fractional days, |
1722 | /// rounding to the closest integral number of days towards `Duration::zero()`. | |
f035d41b | 1723 | /// It is the same as the addition with a negated `Duration`. |
2c00a5a8 XL |
1724 | /// |
1725 | /// Panics on underflow or overflow. | |
1726 | /// Use [`NaiveDate::checked_sub_signed`](#method.checked_sub_signed) to detect that. | |
1727 | /// | |
1728 | /// # Example | |
1729 | /// | |
49aad941 | 1730 | /// ``` |
5869c6ff | 1731 | /// use chrono::{Duration, NaiveDate}; |
2c00a5a8 XL |
1732 | /// |
1733 | /// let from_ymd = NaiveDate::from_ymd; | |
1734 | /// | |
1735 | /// assert_eq!(from_ymd(2014, 1, 1) - Duration::zero(), from_ymd(2014, 1, 1)); | |
1736 | /// assert_eq!(from_ymd(2014, 1, 1) - Duration::seconds(86399), from_ymd(2014, 1, 1)); | |
1737 | /// assert_eq!(from_ymd(2014, 1, 1) - Duration::seconds(-86399), from_ymd(2014, 1, 1)); | |
1738 | /// assert_eq!(from_ymd(2014, 1, 1) - Duration::days(1), from_ymd(2013, 12, 31)); | |
1739 | /// assert_eq!(from_ymd(2014, 1, 1) - Duration::days(-1), from_ymd(2014, 1, 2)); | |
1740 | /// assert_eq!(from_ymd(2014, 1, 1) - Duration::days(364), from_ymd(2013, 1, 2)); | |
1741 | /// assert_eq!(from_ymd(2014, 1, 1) - Duration::days(365*4 + 1), from_ymd(2010, 1, 1)); | |
1742 | /// assert_eq!(from_ymd(2014, 1, 1) - Duration::days(365*400 + 97), from_ymd(1614, 1, 1)); | |
49aad941 | 1743 | /// ``` |
2c00a5a8 XL |
1744 | impl Sub<OldDuration> for NaiveDate { |
1745 | type Output = NaiveDate; | |
1746 | ||
1747 | #[inline] | |
1748 | fn sub(self, rhs: OldDuration) -> NaiveDate { | |
1749 | self.checked_sub_signed(rhs).expect("`NaiveDate - Duration` overflowed") | |
1750 | } | |
1751 | } | |
1752 | ||
1753 | impl SubAssign<OldDuration> for NaiveDate { | |
1754 | #[inline] | |
1755 | fn sub_assign(&mut self, rhs: OldDuration) { | |
1756 | *self = self.sub(rhs); | |
1757 | } | |
1758 | } | |
1759 | ||
8faf50e0 XL |
1760 | /// Subtracts another `NaiveDate` from the current date. |
1761 | /// Returns a `Duration` of integral numbers. | |
f035d41b | 1762 | /// |
8faf50e0 XL |
1763 | /// This does not overflow or underflow at all, |
1764 | /// as all possible output fits in the range of `Duration`. | |
1765 | /// | |
1766 | /// The implementation is a wrapper around | |
1767 | /// [`NaiveDate::signed_duration_since`](#method.signed_duration_since). | |
1768 | /// | |
1769 | /// # Example | |
1770 | /// | |
49aad941 | 1771 | /// ``` |
5869c6ff | 1772 | /// use chrono::{Duration, NaiveDate}; |
8faf50e0 XL |
1773 | /// |
1774 | /// let from_ymd = NaiveDate::from_ymd; | |
1775 | /// | |
1776 | /// assert_eq!(from_ymd(2014, 1, 1) - from_ymd(2014, 1, 1), Duration::zero()); | |
1777 | /// assert_eq!(from_ymd(2014, 1, 1) - from_ymd(2013, 12, 31), Duration::days(1)); | |
1778 | /// assert_eq!(from_ymd(2014, 1, 1) - from_ymd(2014, 1, 2), Duration::days(-1)); | |
1779 | /// assert_eq!(from_ymd(2014, 1, 1) - from_ymd(2013, 9, 23), Duration::days(100)); | |
1780 | /// assert_eq!(from_ymd(2014, 1, 1) - from_ymd(2013, 1, 1), Duration::days(365)); | |
1781 | /// assert_eq!(from_ymd(2014, 1, 1) - from_ymd(2010, 1, 1), Duration::days(365*4 + 1)); | |
1782 | /// assert_eq!(from_ymd(2014, 1, 1) - from_ymd(1614, 1, 1), Duration::days(365*400 + 97)); | |
49aad941 | 1783 | /// ``` |
8faf50e0 XL |
1784 | impl Sub<NaiveDate> for NaiveDate { |
1785 | type Output = OldDuration; | |
1786 | ||
1787 | #[inline] | |
1788 | fn sub(self, rhs: NaiveDate) -> OldDuration { | |
1789 | self.signed_duration_since(rhs) | |
1790 | } | |
1791 | } | |
1792 | ||
3dfed10e XL |
1793 | /// Iterator over `NaiveDate` with a step size of one day. |
1794 | #[derive(Debug, Copy, Clone, Hash, PartialEq, PartialOrd, Eq, Ord)] | |
1795 | pub struct NaiveDateDaysIterator { | |
1796 | value: NaiveDate, | |
1797 | } | |
1798 | ||
1799 | impl Iterator for NaiveDateDaysIterator { | |
1800 | type Item = NaiveDate; | |
1801 | ||
1802 | fn next(&mut self) -> Option<Self::Item> { | |
49aad941 | 1803 | if self.value == NaiveDate::MAX { |
3dfed10e XL |
1804 | return None; |
1805 | } | |
49aad941 | 1806 | // current < NaiveDate::MAX from here on: |
3dfed10e | 1807 | let current = self.value; |
49aad941 FG |
1808 | // This can't panic because current is < NaiveDate::MAX: |
1809 | self.value = current.succ_opt().unwrap(); | |
3dfed10e XL |
1810 | Some(current) |
1811 | } | |
1812 | ||
1813 | fn size_hint(&self) -> (usize, Option<usize>) { | |
49aad941 | 1814 | let exact_size = NaiveDate::MAX.signed_duration_since(self.value).num_days(); |
3dfed10e XL |
1815 | (exact_size as usize, Some(exact_size as usize)) |
1816 | } | |
1817 | } | |
1818 | ||
1819 | impl ExactSizeIterator for NaiveDateDaysIterator {} | |
1820 | ||
49aad941 FG |
1821 | impl DoubleEndedIterator for NaiveDateDaysIterator { |
1822 | fn next_back(&mut self) -> Option<Self::Item> { | |
1823 | if self.value == NaiveDate::MIN { | |
1824 | return None; | |
1825 | } | |
1826 | let current = self.value; | |
1827 | self.value = current.pred_opt().unwrap(); | |
1828 | Some(current) | |
1829 | } | |
1830 | } | |
1831 | ||
3dfed10e XL |
1832 | #[derive(Debug, Copy, Clone, Hash, PartialEq, PartialOrd, Eq, Ord)] |
1833 | pub struct NaiveDateWeeksIterator { | |
1834 | value: NaiveDate, | |
1835 | } | |
1836 | ||
1837 | impl Iterator for NaiveDateWeeksIterator { | |
1838 | type Item = NaiveDate; | |
1839 | ||
1840 | fn next(&mut self) -> Option<Self::Item> { | |
49aad941 | 1841 | if NaiveDate::MAX - self.value < OldDuration::weeks(1) { |
3dfed10e XL |
1842 | return None; |
1843 | } | |
1844 | let current = self.value; | |
1845 | self.value = current + OldDuration::weeks(1); | |
1846 | Some(current) | |
1847 | } | |
1848 | ||
1849 | fn size_hint(&self) -> (usize, Option<usize>) { | |
49aad941 | 1850 | let exact_size = NaiveDate::MAX.signed_duration_since(self.value).num_weeks(); |
3dfed10e XL |
1851 | (exact_size as usize, Some(exact_size as usize)) |
1852 | } | |
1853 | } | |
1854 | ||
1855 | impl ExactSizeIterator for NaiveDateWeeksIterator {} | |
1856 | ||
49aad941 FG |
1857 | impl DoubleEndedIterator for NaiveDateWeeksIterator { |
1858 | fn next_back(&mut self) -> Option<Self::Item> { | |
1859 | if self.value - NaiveDate::MIN < OldDuration::weeks(1) { | |
1860 | return None; | |
1861 | } | |
1862 | let current = self.value; | |
1863 | self.value = current - OldDuration::weeks(1); | |
1864 | Some(current) | |
1865 | } | |
1866 | } | |
1867 | ||
3dfed10e XL |
1868 | // TODO: NaiveDateDaysIterator and NaiveDateWeeksIterator should implement FusedIterator, |
1869 | // TrustedLen, and Step once they becomes stable. | |
1870 | // See: https://github.com/chronotope/chrono/issues/208 | |
1871 | ||
f035d41b | 1872 | /// The `Debug` output of the naive date `d` is the same as |
2c00a5a8 XL |
1873 | /// [`d.format("%Y-%m-%d")`](../format/strftime/index.html). |
1874 | /// | |
1875 | /// The string printed can be readily parsed via the `parse` method on `str`. | |
1876 | /// | |
1877 | /// # Example | |
1878 | /// | |
49aad941 | 1879 | /// ``` |
2c00a5a8 XL |
1880 | /// use chrono::NaiveDate; |
1881 | /// | |
49aad941 FG |
1882 | /// assert_eq!(format!("{:?}", NaiveDate::from_ymd_opt(2015, 9, 5).unwrap()), "2015-09-05"); |
1883 | /// assert_eq!(format!("{:?}", NaiveDate::from_ymd_opt( 0, 1, 1).unwrap()), "0000-01-01"); | |
1884 | /// assert_eq!(format!("{:?}", NaiveDate::from_ymd_opt(9999, 12, 31).unwrap()), "9999-12-31"); | |
1885 | /// ``` | |
2c00a5a8 XL |
1886 | /// |
1887 | /// ISO 8601 requires an explicit sign for years before 1 BCE or after 9999 CE. | |
1888 | /// | |
49aad941 | 1889 | /// ``` |
2c00a5a8 | 1890 | /// # use chrono::NaiveDate; |
49aad941 FG |
1891 | /// assert_eq!(format!("{:?}", NaiveDate::from_ymd_opt( -1, 1, 1).unwrap()), "-0001-01-01"); |
1892 | /// assert_eq!(format!("{:?}", NaiveDate::from_ymd_opt(10000, 12, 31).unwrap()), "+10000-12-31"); | |
1893 | /// ``` | |
2c00a5a8 XL |
1894 | impl fmt::Debug for NaiveDate { |
1895 | fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { | |
49aad941 FG |
1896 | use core::fmt::Write; |
1897 | ||
2c00a5a8 XL |
1898 | let year = self.year(); |
1899 | let mdf = self.mdf(); | |
49aad941 FG |
1900 | if (0..=9999).contains(&year) { |
1901 | write_hundreds(f, (year / 100) as u8)?; | |
1902 | write_hundreds(f, (year % 100) as u8)?; | |
2c00a5a8 XL |
1903 | } else { |
1904 | // ISO 8601 requires the explicit sign for out-of-range years | |
49aad941 | 1905 | write!(f, "{:+05}", year)?; |
2c00a5a8 | 1906 | } |
49aad941 FG |
1907 | |
1908 | f.write_char('-')?; | |
1909 | write_hundreds(f, mdf.month() as u8)?; | |
1910 | f.write_char('-')?; | |
1911 | write_hundreds(f, mdf.day() as u8) | |
2c00a5a8 XL |
1912 | } |
1913 | } | |
1914 | ||
f035d41b | 1915 | /// The `Display` output of the naive date `d` is the same as |
2c00a5a8 XL |
1916 | /// [`d.format("%Y-%m-%d")`](../format/strftime/index.html). |
1917 | /// | |
1918 | /// The string printed can be readily parsed via the `parse` method on `str`. | |
1919 | /// | |
1920 | /// # Example | |
1921 | /// | |
49aad941 | 1922 | /// ``` |
2c00a5a8 XL |
1923 | /// use chrono::NaiveDate; |
1924 | /// | |
49aad941 FG |
1925 | /// assert_eq!(format!("{}", NaiveDate::from_ymd_opt(2015, 9, 5).unwrap()), "2015-09-05"); |
1926 | /// assert_eq!(format!("{}", NaiveDate::from_ymd_opt( 0, 1, 1).unwrap()), "0000-01-01"); | |
1927 | /// assert_eq!(format!("{}", NaiveDate::from_ymd_opt(9999, 12, 31).unwrap()), "9999-12-31"); | |
1928 | /// ``` | |
2c00a5a8 XL |
1929 | /// |
1930 | /// ISO 8601 requires an explicit sign for years before 1 BCE or after 9999 CE. | |
1931 | /// | |
49aad941 | 1932 | /// ``` |
2c00a5a8 | 1933 | /// # use chrono::NaiveDate; |
49aad941 FG |
1934 | /// assert_eq!(format!("{}", NaiveDate::from_ymd_opt( -1, 1, 1).unwrap()), "-0001-01-01"); |
1935 | /// assert_eq!(format!("{}", NaiveDate::from_ymd_opt(10000, 12, 31).unwrap()), "+10000-12-31"); | |
1936 | /// ``` | |
2c00a5a8 | 1937 | impl fmt::Display for NaiveDate { |
f035d41b XL |
1938 | fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { |
1939 | fmt::Debug::fmt(self, f) | |
1940 | } | |
2c00a5a8 XL |
1941 | } |
1942 | ||
1943 | /// Parsing a `str` into a `NaiveDate` uses the same format, | |
1944 | /// [`%Y-%m-%d`](../format/strftime/index.html), as in `Debug` and `Display`. | |
1945 | /// | |
1946 | /// # Example | |
1947 | /// | |
49aad941 | 1948 | /// ``` |
2c00a5a8 XL |
1949 | /// use chrono::NaiveDate; |
1950 | /// | |
49aad941 | 1951 | /// let d = NaiveDate::from_ymd_opt(2015, 9, 18).unwrap(); |
2c00a5a8 XL |
1952 | /// assert_eq!("2015-09-18".parse::<NaiveDate>(), Ok(d)); |
1953 | /// | |
49aad941 | 1954 | /// let d = NaiveDate::from_ymd_opt(12345, 6, 7).unwrap(); |
2c00a5a8 XL |
1955 | /// assert_eq!("+12345-6-7".parse::<NaiveDate>(), Ok(d)); |
1956 | /// | |
1957 | /// assert!("foo".parse::<NaiveDate>().is_err()); | |
49aad941 | 1958 | /// ``` |
2c00a5a8 XL |
1959 | impl str::FromStr for NaiveDate { |
1960 | type Err = ParseError; | |
1961 | ||
1962 | fn from_str(s: &str) -> ParseResult<NaiveDate> { | |
49aad941 | 1963 | const ITEMS: &[Item<'static>] = &[ |
f035d41b XL |
1964 | Item::Numeric(Numeric::Year, Pad::Zero), |
1965 | Item::Space(""), | |
1966 | Item::Literal("-"), | |
1967 | Item::Numeric(Numeric::Month, Pad::Zero), | |
1968 | Item::Space(""), | |
1969 | Item::Literal("-"), | |
1970 | Item::Numeric(Numeric::Day, Pad::Zero), | |
2c00a5a8 XL |
1971 | Item::Space(""), |
1972 | ]; | |
1973 | ||
1974 | let mut parsed = Parsed::new(); | |
f035d41b | 1975 | parse(&mut parsed, s, ITEMS.iter())?; |
2c00a5a8 XL |
1976 | parsed.to_naive_date() |
1977 | } | |
1978 | } | |
1979 | ||
49aad941 FG |
1980 | /// The default value for a NaiveDate is 1st of January 1970. |
1981 | /// | |
1982 | /// # Example | |
1983 | /// | |
1984 | /// ```rust | |
1985 | /// use chrono::NaiveDate; | |
1986 | /// | |
1987 | /// let default_date = NaiveDate::default(); | |
1988 | /// assert_eq!(default_date, NaiveDate::from_ymd_opt(1970, 1, 1).unwrap()); | |
1989 | /// ``` | |
1990 | impl Default for NaiveDate { | |
1991 | fn default() -> Self { | |
1992 | NaiveDate::from_ymd_opt(1970, 1, 1).unwrap() | |
1993 | } | |
1994 | } | |
1995 | ||
2c00a5a8 XL |
1996 | #[cfg(all(test, any(feature = "rustc-serialize", feature = "serde")))] |
1997 | fn test_encodable_json<F, E>(to_string: F) | |
f035d41b XL |
1998 | where |
1999 | F: Fn(&NaiveDate) -> Result<String, E>, | |
2000 | E: ::std::fmt::Debug, | |
2c00a5a8 | 2001 | { |
49aad941 FG |
2002 | assert_eq!( |
2003 | to_string(&NaiveDate::from_ymd_opt(2014, 7, 24).unwrap()).ok(), | |
2004 | Some(r#""2014-07-24""#.into()) | |
2005 | ); | |
2006 | assert_eq!( | |
2007 | to_string(&NaiveDate::from_ymd_opt(0, 1, 1).unwrap()).ok(), | |
2008 | Some(r#""0000-01-01""#.into()) | |
2009 | ); | |
2010 | assert_eq!( | |
2011 | to_string(&NaiveDate::from_ymd_opt(-1, 12, 31).unwrap()).ok(), | |
2012 | Some(r#""-0001-12-31""#.into()) | |
2013 | ); | |
2014 | assert_eq!(to_string(&NaiveDate::MIN).ok(), Some(r#""-262144-01-01""#.into())); | |
2015 | assert_eq!(to_string(&NaiveDate::MAX).ok(), Some(r#""+262143-12-31""#.into())); | |
2c00a5a8 XL |
2016 | } |
2017 | ||
2018 | #[cfg(all(test, any(feature = "rustc-serialize", feature = "serde")))] | |
2019 | fn test_decodable_json<F, E>(from_str: F) | |
f035d41b XL |
2020 | where |
2021 | F: Fn(&str) -> Result<NaiveDate, E>, | |
2022 | E: ::std::fmt::Debug, | |
2c00a5a8 XL |
2023 | { |
2024 | use std::{i32, i64}; | |
2025 | ||
49aad941 FG |
2026 | assert_eq!( |
2027 | from_str(r#""2016-07-08""#).ok(), | |
2028 | Some(NaiveDate::from_ymd_opt(2016, 7, 8).unwrap()) | |
2029 | ); | |
2030 | assert_eq!(from_str(r#""2016-7-8""#).ok(), Some(NaiveDate::from_ymd_opt(2016, 7, 8).unwrap())); | |
2031 | assert_eq!(from_str(r#""+002016-07-08""#).ok(), NaiveDate::from_ymd_opt(2016, 7, 8)); | |
2032 | assert_eq!(from_str(r#""0000-01-01""#).ok(), Some(NaiveDate::from_ymd_opt(0, 1, 1).unwrap())); | |
2033 | assert_eq!(from_str(r#""0-1-1""#).ok(), Some(NaiveDate::from_ymd_opt(0, 1, 1).unwrap())); | |
2034 | assert_eq!( | |
2035 | from_str(r#""-0001-12-31""#).ok(), | |
2036 | Some(NaiveDate::from_ymd_opt(-1, 12, 31).unwrap()) | |
2037 | ); | |
2038 | assert_eq!(from_str(r#""-262144-01-01""#).ok(), Some(NaiveDate::MIN)); | |
2039 | assert_eq!(from_str(r#""+262143-12-31""#).ok(), Some(NaiveDate::MAX)); | |
2c00a5a8 XL |
2040 | |
2041 | // bad formats | |
2042 | assert!(from_str(r#""""#).is_err()); | |
2043 | assert!(from_str(r#""20001231""#).is_err()); | |
2044 | assert!(from_str(r#""2000-00-00""#).is_err()); | |
2045 | assert!(from_str(r#""2000-02-30""#).is_err()); | |
2046 | assert!(from_str(r#""2001-02-29""#).is_err()); | |
2047 | assert!(from_str(r#""2002-002-28""#).is_err()); | |
2048 | assert!(from_str(r#""yyyy-mm-dd""#).is_err()); | |
2049 | assert!(from_str(r#"0"#).is_err()); | |
2050 | assert!(from_str(r#"20.01"#).is_err()); | |
2051 | assert!(from_str(&i32::MIN.to_string()).is_err()); | |
2052 | assert!(from_str(&i32::MAX.to_string()).is_err()); | |
2053 | assert!(from_str(&i64::MIN.to_string()).is_err()); | |
2054 | assert!(from_str(&i64::MAX.to_string()).is_err()); | |
2055 | assert!(from_str(r#"{}"#).is_err()); | |
2056 | // pre-0.3.0 rustc-serialize format is now invalid | |
2057 | assert!(from_str(r#"{"ymdf":20}"#).is_err()); | |
2058 | assert!(from_str(r#"null"#).is_err()); | |
2059 | } | |
2060 | ||
2061 | #[cfg(feature = "rustc-serialize")] | |
49aad941 | 2062 | #[cfg_attr(docsrs, doc(cfg(feature = "rustc-serialize")))] |
2c00a5a8 XL |
2063 | mod rustc_serialize { |
2064 | use super::NaiveDate; | |
f035d41b | 2065 | use rustc_serialize::{Decodable, Decoder, Encodable, Encoder}; |
2c00a5a8 XL |
2066 | |
2067 | impl Encodable for NaiveDate { | |
2068 | fn encode<S: Encoder>(&self, s: &mut S) -> Result<(), S::Error> { | |
2069 | format!("{:?}", self).encode(s) | |
2070 | } | |
2071 | } | |
2072 | ||
2073 | impl Decodable for NaiveDate { | |
2074 | fn decode<D: Decoder>(d: &mut D) -> Result<NaiveDate, D::Error> { | |
2075 | d.read_str()?.parse().map_err(|_| d.error("invalid date")) | |
2076 | } | |
2077 | } | |
2078 | ||
f035d41b XL |
2079 | #[cfg(test)] |
2080 | use rustc_serialize::json; | |
2c00a5a8 XL |
2081 | |
2082 | #[test] | |
2083 | fn test_encodable() { | |
2084 | super::test_encodable_json(json::encode); | |
2085 | } | |
2086 | ||
2087 | #[test] | |
2088 | fn test_decodable() { | |
2089 | super::test_decodable_json(json::decode); | |
2090 | } | |
2091 | } | |
2092 | ||
2093 | #[cfg(feature = "serde")] | |
49aad941 | 2094 | #[cfg_attr(docsrs, doc(cfg(feature = "serde")))] |
2c00a5a8 | 2095 | mod serde { |
2c00a5a8 | 2096 | use super::NaiveDate; |
f035d41b | 2097 | use core::fmt; |
49aad941 | 2098 | use serde::{de, ser}; |
2c00a5a8 XL |
2099 | |
2100 | // TODO not very optimized for space (binary formats would want something better) | |
2101 | ||
2102 | impl ser::Serialize for NaiveDate { | |
2103 | fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> | |
f035d41b XL |
2104 | where |
2105 | S: ser::Serializer, | |
2c00a5a8 XL |
2106 | { |
2107 | struct FormatWrapped<'a, D: 'a> { | |
f035d41b | 2108 | inner: &'a D, |
2c00a5a8 XL |
2109 | } |
2110 | ||
2111 | impl<'a, D: fmt::Debug> fmt::Display for FormatWrapped<'a, D> { | |
2112 | fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { | |
2113 | self.inner.fmt(f) | |
2114 | } | |
2115 | } | |
2116 | ||
2117 | serializer.collect_str(&FormatWrapped { inner: &self }) | |
2118 | } | |
2119 | } | |
2120 | ||
2121 | struct NaiveDateVisitor; | |
2122 | ||
2123 | impl<'de> de::Visitor<'de> for NaiveDateVisitor { | |
2124 | type Value = NaiveDate; | |
2125 | ||
f035d41b | 2126 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { |
49aad941 | 2127 | formatter.write_str("a formatted date string") |
2c00a5a8 XL |
2128 | } |
2129 | ||
f035d41b | 2130 | #[cfg(any(feature = "std", test))] |
49aad941 | 2131 | fn visit_str<E>(self, value: &str) -> Result<Self::Value, E> |
f035d41b XL |
2132 | where |
2133 | E: de::Error, | |
2134 | { | |
2135 | value.parse().map_err(E::custom) | |
2136 | } | |
2137 | ||
2138 | #[cfg(not(any(feature = "std", test)))] | |
49aad941 | 2139 | fn visit_str<E>(self, value: &str) -> Result<Self::Value, E> |
f035d41b XL |
2140 | where |
2141 | E: de::Error, | |
2c00a5a8 | 2142 | { |
f035d41b | 2143 | value.parse().map_err(E::custom) |
2c00a5a8 XL |
2144 | } |
2145 | } | |
2146 | ||
2147 | impl<'de> de::Deserialize<'de> for NaiveDate { | |
2148 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> | |
f035d41b XL |
2149 | where |
2150 | D: de::Deserializer<'de>, | |
2c00a5a8 XL |
2151 | { |
2152 | deserializer.deserialize_str(NaiveDateVisitor) | |
2153 | } | |
2154 | } | |
2155 | ||
2c00a5a8 XL |
2156 | #[test] |
2157 | fn test_serde_serialize() { | |
49aad941 | 2158 | super::test_encodable_json(serde_json::to_string); |
2c00a5a8 XL |
2159 | } |
2160 | ||
2161 | #[test] | |
2162 | fn test_serde_deserialize() { | |
49aad941 | 2163 | super::test_decodable_json(|input| serde_json::from_str(input)); |
2c00a5a8 XL |
2164 | } |
2165 | ||
2166 | #[test] | |
2167 | fn test_serde_bincode() { | |
2168 | // Bincode is relevant to test separately from JSON because | |
2169 | // it is not self-describing. | |
49aad941 | 2170 | use bincode::{deserialize, serialize}; |
2c00a5a8 | 2171 | |
49aad941 FG |
2172 | let d = NaiveDate::from_ymd_opt(2014, 7, 24).unwrap(); |
2173 | let encoded = serialize(&d).unwrap(); | |
2c00a5a8 XL |
2174 | let decoded: NaiveDate = deserialize(&encoded).unwrap(); |
2175 | assert_eq!(d, decoded); | |
2176 | } | |
2177 | } | |
2178 | ||
2179 | #[cfg(test)] | |
2180 | mod tests { | |
49aad941 FG |
2181 | use super::{ |
2182 | Days, Months, NaiveDate, MAX_DAYS_FROM_YEAR_0, MAX_YEAR, MIN_DAYS_FROM_YEAR_0, MIN_YEAR, | |
2183 | }; | |
2184 | use crate::oldtime::Duration; | |
2185 | use crate::{Datelike, Weekday}; | |
2186 | use std::{ | |
2187 | convert::{TryFrom, TryInto}, | |
2188 | i32, u32, | |
2189 | }; | |
2190 | ||
2191 | #[test] | |
2192 | fn diff_months() { | |
2193 | // identity | |
2194 | assert_eq!( | |
2195 | NaiveDate::from_ymd_opt(2022, 8, 3).unwrap().checked_add_months(Months::new(0)), | |
2196 | Some(NaiveDate::from_ymd_opt(2022, 8, 3).unwrap()) | |
2197 | ); | |
2198 | ||
2199 | // add with months exceeding `i32::MAX` | |
2200 | assert_eq!( | |
2201 | NaiveDate::from_ymd_opt(2022, 8, 3) | |
2202 | .unwrap() | |
2203 | .checked_add_months(Months::new(i32::MAX as u32 + 1)), | |
2204 | None | |
2205 | ); | |
2206 | ||
2207 | // sub with months exceeding `i32::MIN` | |
2208 | assert_eq!( | |
2209 | NaiveDate::from_ymd_opt(2022, 8, 3) | |
2210 | .unwrap() | |
2211 | .checked_sub_months(Months::new((i32::MIN as i64).abs() as u32 + 1)), | |
2212 | None | |
2213 | ); | |
2214 | ||
2215 | // add overflowing year | |
2216 | assert_eq!(NaiveDate::MAX.checked_add_months(Months::new(1)), None); | |
2217 | ||
2218 | // add underflowing year | |
2219 | assert_eq!(NaiveDate::MIN.checked_sub_months(Months::new(1)), None); | |
2220 | ||
2221 | // sub crossing year 0 boundary | |
2222 | assert_eq!( | |
2223 | NaiveDate::from_ymd_opt(2022, 8, 3).unwrap().checked_sub_months(Months::new(2050 * 12)), | |
2224 | Some(NaiveDate::from_ymd_opt(-28, 8, 3).unwrap()) | |
2225 | ); | |
2226 | ||
2227 | // add crossing year boundary | |
2228 | assert_eq!( | |
2229 | NaiveDate::from_ymd_opt(2022, 8, 3).unwrap().checked_add_months(Months::new(6)), | |
2230 | Some(NaiveDate::from_ymd_opt(2023, 2, 3).unwrap()) | |
2231 | ); | |
2232 | ||
2233 | // sub crossing year boundary | |
2234 | assert_eq!( | |
2235 | NaiveDate::from_ymd_opt(2022, 8, 3).unwrap().checked_sub_months(Months::new(10)), | |
2236 | Some(NaiveDate::from_ymd_opt(2021, 10, 3).unwrap()) | |
2237 | ); | |
2238 | ||
2239 | // add clamping day, non-leap year | |
2240 | assert_eq!( | |
2241 | NaiveDate::from_ymd_opt(2022, 1, 29).unwrap().checked_add_months(Months::new(1)), | |
2242 | Some(NaiveDate::from_ymd_opt(2022, 2, 28).unwrap()) | |
2243 | ); | |
2244 | ||
2245 | // add to leap day | |
2246 | assert_eq!( | |
2247 | NaiveDate::from_ymd_opt(2022, 10, 29).unwrap().checked_add_months(Months::new(16)), | |
2248 | Some(NaiveDate::from_ymd_opt(2024, 2, 29).unwrap()) | |
2249 | ); | |
2250 | ||
2251 | // add into december | |
2252 | assert_eq!( | |
2253 | NaiveDate::from_ymd_opt(2022, 10, 31).unwrap().checked_add_months(Months::new(2)), | |
2254 | Some(NaiveDate::from_ymd_opt(2022, 12, 31).unwrap()) | |
2255 | ); | |
2256 | ||
2257 | // sub into december | |
2258 | assert_eq!( | |
2259 | NaiveDate::from_ymd_opt(2022, 10, 31).unwrap().checked_sub_months(Months::new(10)), | |
2260 | Some(NaiveDate::from_ymd_opt(2021, 12, 31).unwrap()) | |
2261 | ); | |
2262 | ||
2263 | // add into january | |
2264 | assert_eq!( | |
2265 | NaiveDate::from_ymd_opt(2022, 8, 3).unwrap().checked_add_months(Months::new(5)), | |
2266 | Some(NaiveDate::from_ymd_opt(2023, 1, 3).unwrap()) | |
2267 | ); | |
2268 | ||
2269 | // sub into january | |
2270 | assert_eq!( | |
2271 | NaiveDate::from_ymd_opt(2022, 8, 3).unwrap().checked_sub_months(Months::new(7)), | |
2272 | Some(NaiveDate::from_ymd_opt(2022, 1, 3).unwrap()) | |
2273 | ); | |
2274 | } | |
2275 | ||
2276 | #[test] | |
2277 | fn test_readme_doomsday() { | |
2278 | use num_iter::range_inclusive; | |
2279 | ||
2280 | for y in range_inclusive(NaiveDate::MIN.year(), NaiveDate::MAX.year()) { | |
2281 | // even months | |
2282 | let d4 = NaiveDate::from_ymd_opt(y, 4, 4).unwrap(); | |
2283 | let d6 = NaiveDate::from_ymd_opt(y, 6, 6).unwrap(); | |
2284 | let d8 = NaiveDate::from_ymd_opt(y, 8, 8).unwrap(); | |
2285 | let d10 = NaiveDate::from_ymd_opt(y, 10, 10).unwrap(); | |
2286 | let d12 = NaiveDate::from_ymd_opt(y, 12, 12).unwrap(); | |
2287 | ||
2288 | // nine to five, seven-eleven | |
2289 | let d59 = NaiveDate::from_ymd_opt(y, 5, 9).unwrap(); | |
2290 | let d95 = NaiveDate::from_ymd_opt(y, 9, 5).unwrap(); | |
2291 | let d711 = NaiveDate::from_ymd_opt(y, 7, 11).unwrap(); | |
2292 | let d117 = NaiveDate::from_ymd_opt(y, 11, 7).unwrap(); | |
2293 | ||
2294 | // "March 0" | |
2295 | let d30 = NaiveDate::from_ymd_opt(y, 3, 1).unwrap().pred_opt().unwrap(); | |
2296 | ||
2297 | let weekday = d30.weekday(); | |
2298 | let other_dates = [d4, d6, d8, d10, d12, d59, d95, d711, d117]; | |
2299 | assert!(other_dates.iter().all(|d| d.weekday() == weekday)); | |
2300 | } | |
2301 | } | |
2c00a5a8 XL |
2302 | |
2303 | #[test] | |
2304 | fn test_date_from_ymd() { | |
49aad941 | 2305 | let ymd_opt = NaiveDate::from_ymd_opt; |
2c00a5a8 XL |
2306 | |
2307 | assert!(ymd_opt(2012, 0, 1).is_none()); | |
2308 | assert!(ymd_opt(2012, 1, 1).is_some()); | |
2309 | assert!(ymd_opt(2012, 2, 29).is_some()); | |
2310 | assert!(ymd_opt(2014, 2, 29).is_none()); | |
2311 | assert!(ymd_opt(2014, 3, 0).is_none()); | |
2312 | assert!(ymd_opt(2014, 3, 1).is_some()); | |
2313 | assert!(ymd_opt(2014, 3, 31).is_some()); | |
2314 | assert!(ymd_opt(2014, 3, 32).is_none()); | |
2315 | assert!(ymd_opt(2014, 12, 31).is_some()); | |
2316 | assert!(ymd_opt(2014, 13, 1).is_none()); | |
2317 | } | |
2318 | ||
2319 | #[test] | |
2320 | fn test_date_from_yo() { | |
49aad941 FG |
2321 | let yo_opt = NaiveDate::from_yo_opt; |
2322 | let ymd = |y, m, d| NaiveDate::from_ymd_opt(y, m, d).unwrap(); | |
2c00a5a8 XL |
2323 | |
2324 | assert_eq!(yo_opt(2012, 0), None); | |
2325 | assert_eq!(yo_opt(2012, 1), Some(ymd(2012, 1, 1))); | |
2326 | assert_eq!(yo_opt(2012, 2), Some(ymd(2012, 1, 2))); | |
2327 | assert_eq!(yo_opt(2012, 32), Some(ymd(2012, 2, 1))); | |
2328 | assert_eq!(yo_opt(2012, 60), Some(ymd(2012, 2, 29))); | |
2329 | assert_eq!(yo_opt(2012, 61), Some(ymd(2012, 3, 1))); | |
2330 | assert_eq!(yo_opt(2012, 100), Some(ymd(2012, 4, 9))); | |
2331 | assert_eq!(yo_opt(2012, 200), Some(ymd(2012, 7, 18))); | |
2332 | assert_eq!(yo_opt(2012, 300), Some(ymd(2012, 10, 26))); | |
2333 | assert_eq!(yo_opt(2012, 366), Some(ymd(2012, 12, 31))); | |
2334 | assert_eq!(yo_opt(2012, 367), None); | |
2335 | ||
2336 | assert_eq!(yo_opt(2014, 0), None); | |
2337 | assert_eq!(yo_opt(2014, 1), Some(ymd(2014, 1, 1))); | |
2338 | assert_eq!(yo_opt(2014, 2), Some(ymd(2014, 1, 2))); | |
2339 | assert_eq!(yo_opt(2014, 32), Some(ymd(2014, 2, 1))); | |
2340 | assert_eq!(yo_opt(2014, 59), Some(ymd(2014, 2, 28))); | |
2341 | assert_eq!(yo_opt(2014, 60), Some(ymd(2014, 3, 1))); | |
2342 | assert_eq!(yo_opt(2014, 100), Some(ymd(2014, 4, 10))); | |
2343 | assert_eq!(yo_opt(2014, 200), Some(ymd(2014, 7, 19))); | |
2344 | assert_eq!(yo_opt(2014, 300), Some(ymd(2014, 10, 27))); | |
2345 | assert_eq!(yo_opt(2014, 365), Some(ymd(2014, 12, 31))); | |
2346 | assert_eq!(yo_opt(2014, 366), None); | |
2347 | } | |
2348 | ||
2349 | #[test] | |
2350 | fn test_date_from_isoywd() { | |
49aad941 FG |
2351 | let isoywd_opt = NaiveDate::from_isoywd_opt; |
2352 | let ymd = |y, m, d| NaiveDate::from_ymd_opt(y, m, d).unwrap(); | |
2c00a5a8 XL |
2353 | |
2354 | assert_eq!(isoywd_opt(2004, 0, Weekday::Sun), None); | |
2355 | assert_eq!(isoywd_opt(2004, 1, Weekday::Mon), Some(ymd(2003, 12, 29))); | |
2356 | assert_eq!(isoywd_opt(2004, 1, Weekday::Sun), Some(ymd(2004, 1, 4))); | |
2357 | assert_eq!(isoywd_opt(2004, 2, Weekday::Mon), Some(ymd(2004, 1, 5))); | |
2358 | assert_eq!(isoywd_opt(2004, 2, Weekday::Sun), Some(ymd(2004, 1, 11))); | |
2359 | assert_eq!(isoywd_opt(2004, 52, Weekday::Mon), Some(ymd(2004, 12, 20))); | |
2360 | assert_eq!(isoywd_opt(2004, 52, Weekday::Sun), Some(ymd(2004, 12, 26))); | |
2361 | assert_eq!(isoywd_opt(2004, 53, Weekday::Mon), Some(ymd(2004, 12, 27))); | |
2362 | assert_eq!(isoywd_opt(2004, 53, Weekday::Sun), Some(ymd(2005, 1, 2))); | |
2363 | assert_eq!(isoywd_opt(2004, 54, Weekday::Mon), None); | |
2364 | ||
2365 | assert_eq!(isoywd_opt(2011, 0, Weekday::Sun), None); | |
2366 | assert_eq!(isoywd_opt(2011, 1, Weekday::Mon), Some(ymd(2011, 1, 3))); | |
2367 | assert_eq!(isoywd_opt(2011, 1, Weekday::Sun), Some(ymd(2011, 1, 9))); | |
2368 | assert_eq!(isoywd_opt(2011, 2, Weekday::Mon), Some(ymd(2011, 1, 10))); | |
2369 | assert_eq!(isoywd_opt(2011, 2, Weekday::Sun), Some(ymd(2011, 1, 16))); | |
2370 | ||
2371 | assert_eq!(isoywd_opt(2018, 51, Weekday::Mon), Some(ymd(2018, 12, 17))); | |
2372 | assert_eq!(isoywd_opt(2018, 51, Weekday::Sun), Some(ymd(2018, 12, 23))); | |
2373 | assert_eq!(isoywd_opt(2018, 52, Weekday::Mon), Some(ymd(2018, 12, 24))); | |
2374 | assert_eq!(isoywd_opt(2018, 52, Weekday::Sun), Some(ymd(2018, 12, 30))); | |
2375 | assert_eq!(isoywd_opt(2018, 53, Weekday::Mon), None); | |
2376 | } | |
2377 | ||
2378 | #[test] | |
2379 | fn test_date_from_isoywd_and_iso_week() { | |
2380 | for year in 2000..2401 { | |
2381 | for week in 1..54 { | |
f035d41b XL |
2382 | for &weekday in [ |
2383 | Weekday::Mon, | |
2384 | Weekday::Tue, | |
2385 | Weekday::Wed, | |
2386 | Weekday::Thu, | |
2387 | Weekday::Fri, | |
2388 | Weekday::Sat, | |
2389 | Weekday::Sun, | |
2390 | ] | |
2391 | .iter() | |
2392 | { | |
2c00a5a8 | 2393 | let d = NaiveDate::from_isoywd_opt(year, week, weekday); |
49aad941 | 2394 | if let Some(d) = d { |
2c00a5a8 XL |
2395 | assert_eq!(d.weekday(), weekday); |
2396 | let w = d.iso_week(); | |
2397 | assert_eq!(w.year(), year); | |
2398 | assert_eq!(w.week(), week); | |
2399 | } | |
2400 | } | |
2401 | } | |
2402 | } | |
2403 | ||
2404 | for year in 2000..2401 { | |
2405 | for month in 1..13 { | |
2406 | for day in 1..32 { | |
2407 | let d = NaiveDate::from_ymd_opt(year, month, day); | |
49aad941 | 2408 | if let Some(d) = d { |
2c00a5a8 | 2409 | let w = d.iso_week(); |
49aad941 FG |
2410 | let d_ = NaiveDate::from_isoywd_opt(w.year(), w.week(), d.weekday()); |
2411 | assert_eq!(d, d_.unwrap()); | |
2c00a5a8 XL |
2412 | } |
2413 | } | |
2414 | } | |
2415 | } | |
2416 | } | |
2417 | ||
2418 | #[test] | |
2419 | fn test_date_from_num_days_from_ce() { | |
49aad941 FG |
2420 | let from_ndays_from_ce = NaiveDate::from_num_days_from_ce_opt; |
2421 | assert_eq!(from_ndays_from_ce(1), Some(NaiveDate::from_ymd_opt(1, 1, 1).unwrap())); | |
2422 | assert_eq!(from_ndays_from_ce(2), Some(NaiveDate::from_ymd_opt(1, 1, 2).unwrap())); | |
2423 | assert_eq!(from_ndays_from_ce(31), Some(NaiveDate::from_ymd_opt(1, 1, 31).unwrap())); | |
2424 | assert_eq!(from_ndays_from_ce(32), Some(NaiveDate::from_ymd_opt(1, 2, 1).unwrap())); | |
2425 | assert_eq!(from_ndays_from_ce(59), Some(NaiveDate::from_ymd_opt(1, 2, 28).unwrap())); | |
2426 | assert_eq!(from_ndays_from_ce(60), Some(NaiveDate::from_ymd_opt(1, 3, 1).unwrap())); | |
2427 | assert_eq!(from_ndays_from_ce(365), Some(NaiveDate::from_ymd_opt(1, 12, 31).unwrap())); | |
2428 | assert_eq!(from_ndays_from_ce(365 + 1), Some(NaiveDate::from_ymd_opt(2, 1, 1).unwrap())); | |
2429 | assert_eq!( | |
2430 | from_ndays_from_ce(365 * 2 + 1), | |
2431 | Some(NaiveDate::from_ymd_opt(3, 1, 1).unwrap()) | |
2432 | ); | |
2433 | assert_eq!( | |
2434 | from_ndays_from_ce(365 * 3 + 1), | |
2435 | Some(NaiveDate::from_ymd_opt(4, 1, 1).unwrap()) | |
2436 | ); | |
2437 | assert_eq!( | |
2438 | from_ndays_from_ce(365 * 4 + 2), | |
2439 | Some(NaiveDate::from_ymd_opt(5, 1, 1).unwrap()) | |
2440 | ); | |
2441 | assert_eq!( | |
2442 | from_ndays_from_ce(146097 + 1), | |
2443 | Some(NaiveDate::from_ymd_opt(401, 1, 1).unwrap()) | |
2444 | ); | |
2445 | assert_eq!( | |
2446 | from_ndays_from_ce(146097 * 5 + 1), | |
2447 | Some(NaiveDate::from_ymd_opt(2001, 1, 1).unwrap()) | |
2448 | ); | |
2449 | assert_eq!(from_ndays_from_ce(719163), Some(NaiveDate::from_ymd_opt(1970, 1, 1).unwrap())); | |
2450 | assert_eq!(from_ndays_from_ce(0), Some(NaiveDate::from_ymd_opt(0, 12, 31).unwrap())); // 1 BCE | |
2451 | assert_eq!(from_ndays_from_ce(-365), Some(NaiveDate::from_ymd_opt(0, 1, 1).unwrap())); | |
2452 | assert_eq!(from_ndays_from_ce(-366), Some(NaiveDate::from_ymd_opt(-1, 12, 31).unwrap())); // 2 BCE | |
2c00a5a8 XL |
2453 | |
2454 | for days in (-9999..10001).map(|x| x * 100) { | |
2455 | assert_eq!(from_ndays_from_ce(days).map(|d| d.num_days_from_ce()), Some(days)); | |
2456 | } | |
2457 | ||
49aad941 FG |
2458 | assert_eq!(from_ndays_from_ce(NaiveDate::MIN.num_days_from_ce()), Some(NaiveDate::MIN)); |
2459 | assert_eq!(from_ndays_from_ce(NaiveDate::MIN.num_days_from_ce() - 1), None); | |
2460 | assert_eq!(from_ndays_from_ce(NaiveDate::MAX.num_days_from_ce()), Some(NaiveDate::MAX)); | |
2461 | assert_eq!(from_ndays_from_ce(NaiveDate::MAX.num_days_from_ce() + 1), None); | |
2c00a5a8 XL |
2462 | } |
2463 | ||
f035d41b XL |
2464 | #[test] |
2465 | fn test_date_from_weekday_of_month_opt() { | |
49aad941 | 2466 | let ymwd = NaiveDate::from_weekday_of_month_opt; |
f035d41b | 2467 | assert_eq!(ymwd(2018, 8, Weekday::Tue, 0), None); |
49aad941 FG |
2468 | assert_eq!( |
2469 | ymwd(2018, 8, Weekday::Wed, 1), | |
2470 | Some(NaiveDate::from_ymd_opt(2018, 8, 1).unwrap()) | |
2471 | ); | |
2472 | assert_eq!( | |
2473 | ymwd(2018, 8, Weekday::Thu, 1), | |
2474 | Some(NaiveDate::from_ymd_opt(2018, 8, 2).unwrap()) | |
2475 | ); | |
2476 | assert_eq!( | |
2477 | ymwd(2018, 8, Weekday::Sun, 1), | |
2478 | Some(NaiveDate::from_ymd_opt(2018, 8, 5).unwrap()) | |
2479 | ); | |
2480 | assert_eq!( | |
2481 | ymwd(2018, 8, Weekday::Mon, 1), | |
2482 | Some(NaiveDate::from_ymd_opt(2018, 8, 6).unwrap()) | |
2483 | ); | |
2484 | assert_eq!( | |
2485 | ymwd(2018, 8, Weekday::Tue, 1), | |
2486 | Some(NaiveDate::from_ymd_opt(2018, 8, 7).unwrap()) | |
2487 | ); | |
2488 | assert_eq!( | |
2489 | ymwd(2018, 8, Weekday::Wed, 2), | |
2490 | Some(NaiveDate::from_ymd_opt(2018, 8, 8).unwrap()) | |
2491 | ); | |
2492 | assert_eq!( | |
2493 | ymwd(2018, 8, Weekday::Sun, 2), | |
2494 | Some(NaiveDate::from_ymd_opt(2018, 8, 12).unwrap()) | |
2495 | ); | |
2496 | assert_eq!( | |
2497 | ymwd(2018, 8, Weekday::Thu, 3), | |
2498 | Some(NaiveDate::from_ymd_opt(2018, 8, 16).unwrap()) | |
2499 | ); | |
2500 | assert_eq!( | |
2501 | ymwd(2018, 8, Weekday::Thu, 4), | |
2502 | Some(NaiveDate::from_ymd_opt(2018, 8, 23).unwrap()) | |
2503 | ); | |
2504 | assert_eq!( | |
2505 | ymwd(2018, 8, Weekday::Thu, 5), | |
2506 | Some(NaiveDate::from_ymd_opt(2018, 8, 30).unwrap()) | |
2507 | ); | |
2508 | assert_eq!( | |
2509 | ymwd(2018, 8, Weekday::Fri, 5), | |
2510 | Some(NaiveDate::from_ymd_opt(2018, 8, 31).unwrap()) | |
2511 | ); | |
f035d41b XL |
2512 | assert_eq!(ymwd(2018, 8, Weekday::Sat, 5), None); |
2513 | } | |
2514 | ||
2c00a5a8 XL |
2515 | #[test] |
2516 | fn test_date_fields() { | |
2517 | fn check(year: i32, month: u32, day: u32, ordinal: u32) { | |
49aad941 | 2518 | let d1 = NaiveDate::from_ymd_opt(year, month, day).unwrap(); |
2c00a5a8 XL |
2519 | assert_eq!(d1.year(), year); |
2520 | assert_eq!(d1.month(), month); | |
2521 | assert_eq!(d1.day(), day); | |
2522 | assert_eq!(d1.ordinal(), ordinal); | |
2523 | ||
49aad941 | 2524 | let d2 = NaiveDate::from_yo_opt(year, ordinal).unwrap(); |
2c00a5a8 XL |
2525 | assert_eq!(d2.year(), year); |
2526 | assert_eq!(d2.month(), month); | |
2527 | assert_eq!(d2.day(), day); | |
2528 | assert_eq!(d2.ordinal(), ordinal); | |
2529 | ||
2530 | assert_eq!(d1, d2); | |
2531 | } | |
2532 | ||
2533 | check(2012, 1, 1, 1); | |
2534 | check(2012, 1, 2, 2); | |
2535 | check(2012, 2, 1, 32); | |
2536 | check(2012, 2, 29, 60); | |
2537 | check(2012, 3, 1, 61); | |
2538 | check(2012, 4, 9, 100); | |
2539 | check(2012, 7, 18, 200); | |
2540 | check(2012, 10, 26, 300); | |
2541 | check(2012, 12, 31, 366); | |
2542 | ||
2543 | check(2014, 1, 1, 1); | |
2544 | check(2014, 1, 2, 2); | |
2545 | check(2014, 2, 1, 32); | |
2546 | check(2014, 2, 28, 59); | |
2547 | check(2014, 3, 1, 60); | |
2548 | check(2014, 4, 10, 100); | |
2549 | check(2014, 7, 19, 200); | |
2550 | check(2014, 10, 27, 300); | |
2551 | check(2014, 12, 31, 365); | |
2552 | } | |
2553 | ||
2554 | #[test] | |
2555 | fn test_date_weekday() { | |
49aad941 | 2556 | assert_eq!(NaiveDate::from_ymd_opt(1582, 10, 15).unwrap().weekday(), Weekday::Fri); |
2c00a5a8 | 2557 | // May 20, 1875 = ISO 8601 reference date |
49aad941 FG |
2558 | assert_eq!(NaiveDate::from_ymd_opt(1875, 5, 20).unwrap().weekday(), Weekday::Thu); |
2559 | assert_eq!(NaiveDate::from_ymd_opt(2000, 1, 1).unwrap().weekday(), Weekday::Sat); | |
2c00a5a8 XL |
2560 | } |
2561 | ||
2562 | #[test] | |
2563 | fn test_date_with_fields() { | |
49aad941 FG |
2564 | let d = NaiveDate::from_ymd_opt(2000, 2, 29).unwrap(); |
2565 | assert_eq!(d.with_year(-400), Some(NaiveDate::from_ymd_opt(-400, 2, 29).unwrap())); | |
2c00a5a8 | 2566 | assert_eq!(d.with_year(-100), None); |
49aad941 | 2567 | assert_eq!(d.with_year(1600), Some(NaiveDate::from_ymd_opt(1600, 2, 29).unwrap())); |
2c00a5a8 | 2568 | assert_eq!(d.with_year(1900), None); |
49aad941 | 2569 | assert_eq!(d.with_year(2000), Some(NaiveDate::from_ymd_opt(2000, 2, 29).unwrap())); |
2c00a5a8 | 2570 | assert_eq!(d.with_year(2001), None); |
49aad941 | 2571 | assert_eq!(d.with_year(2004), Some(NaiveDate::from_ymd_opt(2004, 2, 29).unwrap())); |
2c00a5a8 XL |
2572 | assert_eq!(d.with_year(i32::MAX), None); |
2573 | ||
49aad941 | 2574 | let d = NaiveDate::from_ymd_opt(2000, 4, 30).unwrap(); |
2c00a5a8 | 2575 | assert_eq!(d.with_month(0), None); |
49aad941 | 2576 | assert_eq!(d.with_month(1), Some(NaiveDate::from_ymd_opt(2000, 1, 30).unwrap())); |
2c00a5a8 | 2577 | assert_eq!(d.with_month(2), None); |
49aad941 FG |
2578 | assert_eq!(d.with_month(3), Some(NaiveDate::from_ymd_opt(2000, 3, 30).unwrap())); |
2579 | assert_eq!(d.with_month(4), Some(NaiveDate::from_ymd_opt(2000, 4, 30).unwrap())); | |
2580 | assert_eq!(d.with_month(12), Some(NaiveDate::from_ymd_opt(2000, 12, 30).unwrap())); | |
2c00a5a8 XL |
2581 | assert_eq!(d.with_month(13), None); |
2582 | assert_eq!(d.with_month(u32::MAX), None); | |
2583 | ||
49aad941 | 2584 | let d = NaiveDate::from_ymd_opt(2000, 2, 8).unwrap(); |
2c00a5a8 | 2585 | assert_eq!(d.with_day(0), None); |
49aad941 FG |
2586 | assert_eq!(d.with_day(1), Some(NaiveDate::from_ymd_opt(2000, 2, 1).unwrap())); |
2587 | assert_eq!(d.with_day(29), Some(NaiveDate::from_ymd_opt(2000, 2, 29).unwrap())); | |
2c00a5a8 XL |
2588 | assert_eq!(d.with_day(30), None); |
2589 | assert_eq!(d.with_day(u32::MAX), None); | |
2590 | ||
49aad941 | 2591 | let d = NaiveDate::from_ymd_opt(2000, 5, 5).unwrap(); |
2c00a5a8 | 2592 | assert_eq!(d.with_ordinal(0), None); |
49aad941 FG |
2593 | assert_eq!(d.with_ordinal(1), Some(NaiveDate::from_ymd_opt(2000, 1, 1).unwrap())); |
2594 | assert_eq!(d.with_ordinal(60), Some(NaiveDate::from_ymd_opt(2000, 2, 29).unwrap())); | |
2595 | assert_eq!(d.with_ordinal(61), Some(NaiveDate::from_ymd_opt(2000, 3, 1).unwrap())); | |
2596 | assert_eq!(d.with_ordinal(366), Some(NaiveDate::from_ymd_opt(2000, 12, 31).unwrap())); | |
2c00a5a8 XL |
2597 | assert_eq!(d.with_ordinal(367), None); |
2598 | assert_eq!(d.with_ordinal(u32::MAX), None); | |
2599 | } | |
2600 | ||
2601 | #[test] | |
2602 | fn test_date_num_days_from_ce() { | |
49aad941 | 2603 | assert_eq!(NaiveDate::from_ymd_opt(1, 1, 1).unwrap().num_days_from_ce(), 1); |
2c00a5a8 XL |
2604 | |
2605 | for year in -9999..10001 { | |
f035d41b | 2606 | assert_eq!( |
49aad941 FG |
2607 | NaiveDate::from_ymd_opt(year, 1, 1).unwrap().num_days_from_ce(), |
2608 | NaiveDate::from_ymd_opt(year - 1, 12, 31).unwrap().num_days_from_ce() + 1 | |
f035d41b | 2609 | ); |
2c00a5a8 XL |
2610 | } |
2611 | } | |
2612 | ||
2613 | #[test] | |
2614 | fn test_date_succ() { | |
49aad941 | 2615 | let ymd = |y, m, d| NaiveDate::from_ymd_opt(y, m, d).unwrap(); |
2c00a5a8 XL |
2616 | assert_eq!(ymd(2014, 5, 6).succ_opt(), Some(ymd(2014, 5, 7))); |
2617 | assert_eq!(ymd(2014, 5, 31).succ_opt(), Some(ymd(2014, 6, 1))); | |
2618 | assert_eq!(ymd(2014, 12, 31).succ_opt(), Some(ymd(2015, 1, 1))); | |
2619 | assert_eq!(ymd(2016, 2, 28).succ_opt(), Some(ymd(2016, 2, 29))); | |
49aad941 | 2620 | assert_eq!(ymd(NaiveDate::MAX.year(), 12, 31).succ_opt(), None); |
2c00a5a8 XL |
2621 | } |
2622 | ||
2623 | #[test] | |
2624 | fn test_date_pred() { | |
49aad941 | 2625 | let ymd = |y, m, d| NaiveDate::from_ymd_opt(y, m, d).unwrap(); |
2c00a5a8 XL |
2626 | assert_eq!(ymd(2016, 3, 1).pred_opt(), Some(ymd(2016, 2, 29))); |
2627 | assert_eq!(ymd(2015, 1, 1).pred_opt(), Some(ymd(2014, 12, 31))); | |
2628 | assert_eq!(ymd(2014, 6, 1).pred_opt(), Some(ymd(2014, 5, 31))); | |
2629 | assert_eq!(ymd(2014, 5, 7).pred_opt(), Some(ymd(2014, 5, 6))); | |
49aad941 | 2630 | assert_eq!(ymd(NaiveDate::MIN.year(), 1, 1).pred_opt(), None); |
2c00a5a8 XL |
2631 | } |
2632 | ||
2633 | #[test] | |
2634 | fn test_date_add() { | |
f035d41b | 2635 | fn check((y1, m1, d1): (i32, u32, u32), rhs: Duration, ymd: Option<(i32, u32, u32)>) { |
49aad941 FG |
2636 | let lhs = NaiveDate::from_ymd_opt(y1, m1, d1).unwrap(); |
2637 | let sum = ymd.map(|(y, m, d)| NaiveDate::from_ymd_opt(y, m, d).unwrap()); | |
2c00a5a8 XL |
2638 | assert_eq!(lhs.checked_add_signed(rhs), sum); |
2639 | assert_eq!(lhs.checked_sub_signed(-rhs), sum); | |
2640 | } | |
2641 | ||
2642 | check((2014, 1, 1), Duration::zero(), Some((2014, 1, 1))); | |
2643 | check((2014, 1, 1), Duration::seconds(86399), Some((2014, 1, 1))); | |
2644 | // always round towards zero | |
2645 | check((2014, 1, 1), Duration::seconds(-86399), Some((2014, 1, 1))); | |
2646 | check((2014, 1, 1), Duration::days(1), Some((2014, 1, 2))); | |
2647 | check((2014, 1, 1), Duration::days(-1), Some((2013, 12, 31))); | |
2648 | check((2014, 1, 1), Duration::days(364), Some((2014, 12, 31))); | |
f035d41b XL |
2649 | check((2014, 1, 1), Duration::days(365 * 4 + 1), Some((2018, 1, 1))); |
2650 | check((2014, 1, 1), Duration::days(365 * 400 + 97), Some((2414, 1, 1))); | |
2c00a5a8 | 2651 | |
f035d41b | 2652 | check((-7, 1, 1), Duration::days(365 * 12 + 3), Some((5, 1, 1))); |
2c00a5a8 XL |
2653 | |
2654 | // overflow check | |
2655 | check((0, 1, 1), Duration::days(MAX_DAYS_FROM_YEAR_0 as i64), Some((MAX_YEAR, 12, 31))); | |
2656 | check((0, 1, 1), Duration::days(MAX_DAYS_FROM_YEAR_0 as i64 + 1), None); | |
2657 | check((0, 1, 1), Duration::max_value(), None); | |
2658 | check((0, 1, 1), Duration::days(MIN_DAYS_FROM_YEAR_0 as i64), Some((MIN_YEAR, 1, 1))); | |
2659 | check((0, 1, 1), Duration::days(MIN_DAYS_FROM_YEAR_0 as i64 - 1), None); | |
2660 | check((0, 1, 1), Duration::min_value(), None); | |
2661 | } | |
2662 | ||
2663 | #[test] | |
2664 | fn test_date_sub() { | |
f035d41b | 2665 | fn check((y1, m1, d1): (i32, u32, u32), (y2, m2, d2): (i32, u32, u32), diff: Duration) { |
49aad941 FG |
2666 | let lhs = NaiveDate::from_ymd_opt(y1, m1, d1).unwrap(); |
2667 | let rhs = NaiveDate::from_ymd_opt(y2, m2, d2).unwrap(); | |
2c00a5a8 XL |
2668 | assert_eq!(lhs.signed_duration_since(rhs), diff); |
2669 | assert_eq!(rhs.signed_duration_since(lhs), -diff); | |
2670 | } | |
2671 | ||
2672 | check((2014, 1, 1), (2014, 1, 1), Duration::zero()); | |
2673 | check((2014, 1, 2), (2014, 1, 1), Duration::days(1)); | |
2674 | check((2014, 12, 31), (2014, 1, 1), Duration::days(364)); | |
2675 | check((2015, 1, 3), (2014, 1, 1), Duration::days(365 + 2)); | |
f035d41b XL |
2676 | check((2018, 1, 1), (2014, 1, 1), Duration::days(365 * 4 + 1)); |
2677 | check((2414, 1, 1), (2014, 1, 1), Duration::days(365 * 400 + 97)); | |
2c00a5a8 XL |
2678 | |
2679 | check((MAX_YEAR, 12, 31), (0, 1, 1), Duration::days(MAX_DAYS_FROM_YEAR_0 as i64)); | |
2680 | check((MIN_YEAR, 1, 1), (0, 1, 1), Duration::days(MIN_DAYS_FROM_YEAR_0 as i64)); | |
2681 | } | |
2682 | ||
49aad941 FG |
2683 | #[test] |
2684 | fn test_date_add_days() { | |
2685 | fn check((y1, m1, d1): (i32, u32, u32), rhs: Days, ymd: Option<(i32, u32, u32)>) { | |
2686 | let lhs = NaiveDate::from_ymd_opt(y1, m1, d1).unwrap(); | |
2687 | let sum = ymd.map(|(y, m, d)| NaiveDate::from_ymd_opt(y, m, d).unwrap()); | |
2688 | assert_eq!(lhs.checked_add_days(rhs), sum); | |
2689 | } | |
2690 | ||
2691 | check((2014, 1, 1), Days::new(0), Some((2014, 1, 1))); | |
2692 | // always round towards zero | |
2693 | check((2014, 1, 1), Days::new(1), Some((2014, 1, 2))); | |
2694 | check((2014, 1, 1), Days::new(364), Some((2014, 12, 31))); | |
2695 | check((2014, 1, 1), Days::new(365 * 4 + 1), Some((2018, 1, 1))); | |
2696 | check((2014, 1, 1), Days::new(365 * 400 + 97), Some((2414, 1, 1))); | |
2697 | ||
2698 | check((-7, 1, 1), Days::new(365 * 12 + 3), Some((5, 1, 1))); | |
2699 | ||
2700 | // overflow check | |
2701 | check( | |
2702 | (0, 1, 1), | |
2703 | Days::new(MAX_DAYS_FROM_YEAR_0.try_into().unwrap()), | |
2704 | Some((MAX_YEAR, 12, 31)), | |
2705 | ); | |
2706 | check((0, 1, 1), Days::new(u64::try_from(MAX_DAYS_FROM_YEAR_0).unwrap() + 1), None); | |
2707 | } | |
2708 | ||
2709 | #[test] | |
2710 | fn test_date_sub_days() { | |
2711 | fn check((y1, m1, d1): (i32, u32, u32), (y2, m2, d2): (i32, u32, u32), diff: Days) { | |
2712 | let lhs = NaiveDate::from_ymd_opt(y1, m1, d1).unwrap(); | |
2713 | let rhs = NaiveDate::from_ymd_opt(y2, m2, d2).unwrap(); | |
2714 | assert_eq!(lhs - diff, rhs); | |
2715 | } | |
2716 | ||
2717 | check((2014, 1, 1), (2014, 1, 1), Days::new(0)); | |
2718 | check((2014, 1, 2), (2014, 1, 1), Days::new(1)); | |
2719 | check((2014, 12, 31), (2014, 1, 1), Days::new(364)); | |
2720 | check((2015, 1, 3), (2014, 1, 1), Days::new(365 + 2)); | |
2721 | check((2018, 1, 1), (2014, 1, 1), Days::new(365 * 4 + 1)); | |
2722 | check((2414, 1, 1), (2014, 1, 1), Days::new(365 * 400 + 97)); | |
2723 | ||
2724 | check((MAX_YEAR, 12, 31), (0, 1, 1), Days::new(MAX_DAYS_FROM_YEAR_0.try_into().unwrap())); | |
2725 | check((0, 1, 1), (MIN_YEAR, 1, 1), Days::new((-MIN_DAYS_FROM_YEAR_0).try_into().unwrap())); | |
2726 | } | |
2727 | ||
2c00a5a8 XL |
2728 | #[test] |
2729 | fn test_date_addassignment() { | |
49aad941 | 2730 | let ymd = |y, m, d| NaiveDate::from_ymd_opt(y, m, d).unwrap(); |
2c00a5a8 XL |
2731 | let mut date = ymd(2016, 10, 1); |
2732 | date += Duration::days(10); | |
f035d41b | 2733 | assert_eq!(date, ymd(2016, 10, 11)); |
2c00a5a8 XL |
2734 | date += Duration::days(30); |
2735 | assert_eq!(date, ymd(2016, 11, 10)); | |
2736 | } | |
2737 | ||
2738 | #[test] | |
2739 | fn test_date_subassignment() { | |
49aad941 | 2740 | let ymd = |y, m, d| NaiveDate::from_ymd_opt(y, m, d).unwrap(); |
2c00a5a8 XL |
2741 | let mut date = ymd(2016, 10, 11); |
2742 | date -= Duration::days(10); | |
f035d41b | 2743 | assert_eq!(date, ymd(2016, 10, 1)); |
2c00a5a8 XL |
2744 | date -= Duration::days(2); |
2745 | assert_eq!(date, ymd(2016, 9, 29)); | |
2746 | } | |
2747 | ||
2748 | #[test] | |
2749 | fn test_date_fmt() { | |
49aad941 FG |
2750 | assert_eq!(format!("{:?}", NaiveDate::from_ymd_opt(2012, 3, 4).unwrap()), "2012-03-04"); |
2751 | assert_eq!(format!("{:?}", NaiveDate::from_ymd_opt(0, 3, 4).unwrap()), "0000-03-04"); | |
2752 | assert_eq!(format!("{:?}", NaiveDate::from_ymd_opt(-307, 3, 4).unwrap()), "-0307-03-04"); | |
2753 | assert_eq!(format!("{:?}", NaiveDate::from_ymd_opt(12345, 3, 4).unwrap()), "+12345-03-04"); | |
2c00a5a8 | 2754 | |
49aad941 FG |
2755 | assert_eq!(NaiveDate::from_ymd_opt(2012, 3, 4).unwrap().to_string(), "2012-03-04"); |
2756 | assert_eq!(NaiveDate::from_ymd_opt(0, 3, 4).unwrap().to_string(), "0000-03-04"); | |
2757 | assert_eq!(NaiveDate::from_ymd_opt(-307, 3, 4).unwrap().to_string(), "-0307-03-04"); | |
2758 | assert_eq!(NaiveDate::from_ymd_opt(12345, 3, 4).unwrap().to_string(), "+12345-03-04"); | |
2c00a5a8 XL |
2759 | |
2760 | // the format specifier should have no effect on `NaiveTime` | |
49aad941 FG |
2761 | assert_eq!(format!("{:+30?}", NaiveDate::from_ymd_opt(1234, 5, 6).unwrap()), "1234-05-06"); |
2762 | assert_eq!( | |
2763 | format!("{:30?}", NaiveDate::from_ymd_opt(12345, 6, 7).unwrap()), | |
2764 | "+12345-06-07" | |
2765 | ); | |
2c00a5a8 XL |
2766 | } |
2767 | ||
2768 | #[test] | |
2769 | fn test_date_from_str() { | |
2770 | // valid cases | |
2771 | let valid = [ | |
2772 | "-0000000123456-1-2", | |
2773 | " -123456 - 1 - 2 ", | |
2774 | "-12345-1-2", | |
2775 | "-1234-12-31", | |
2776 | "-7-6-5", | |
2777 | "350-2-28", | |
2778 | "360-02-29", | |
2779 | "0360-02-29", | |
2780 | "2015-2 -18", | |
2781 | "+70-2-18", | |
2782 | "+70000-2-18", | |
2783 | "+00007-2-18", | |
2784 | ]; | |
2785 | for &s in &valid { | |
2786 | let d = match s.parse::<NaiveDate>() { | |
2787 | Ok(d) => d, | |
f035d41b | 2788 | Err(e) => panic!("parsing `{}` has failed: {}", s, e), |
2c00a5a8 XL |
2789 | }; |
2790 | let s_ = format!("{:?}", d); | |
2791 | // `s` and `s_` may differ, but `s.parse()` and `s_.parse()` must be same | |
2792 | let d_ = match s_.parse::<NaiveDate>() { | |
2793 | Ok(d) => d, | |
f035d41b XL |
2794 | Err(e) => { |
2795 | panic!("`{}` is parsed into `{:?}`, but reparsing that has failed: {}", s, d, e) | |
2796 | } | |
2c00a5a8 | 2797 | }; |
f035d41b XL |
2798 | assert!( |
2799 | d == d_, | |
2800 | "`{}` is parsed into `{:?}`, but reparsed result \ | |
2801 | `{:?}` does not match", | |
2802 | s, | |
2803 | d, | |
2804 | d_ | |
2805 | ); | |
2c00a5a8 XL |
2806 | } |
2807 | ||
2808 | // some invalid cases | |
2809 | // since `ParseErrorKind` is private, all we can do is to check if there was an error | |
2810 | assert!("".parse::<NaiveDate>().is_err()); | |
2811 | assert!("x".parse::<NaiveDate>().is_err()); | |
2812 | assert!("2014".parse::<NaiveDate>().is_err()); | |
2813 | assert!("2014-01".parse::<NaiveDate>().is_err()); | |
2814 | assert!("2014-01-00".parse::<NaiveDate>().is_err()); | |
2815 | assert!("2014-13-57".parse::<NaiveDate>().is_err()); | |
2816 | assert!("9999999-9-9".parse::<NaiveDate>().is_err()); // out-of-bounds | |
2817 | } | |
2818 | ||
2819 | #[test] | |
2820 | fn test_date_parse_from_str() { | |
49aad941 | 2821 | let ymd = |y, m, d| NaiveDate::from_ymd_opt(y, m, d).unwrap(); |
f035d41b XL |
2822 | assert_eq!( |
2823 | NaiveDate::parse_from_str("2014-5-7T12:34:56+09:30", "%Y-%m-%dT%H:%M:%S%z"), | |
2824 | Ok(ymd(2014, 5, 7)) | |
2825 | ); // ignore time and offset | |
2826 | assert_eq!( | |
2827 | NaiveDate::parse_from_str("2015-W06-1=2015-033", "%G-W%V-%u = %Y-%j"), | |
2828 | Ok(ymd(2015, 2, 2)) | |
2829 | ); | |
2830 | assert_eq!( | |
2831 | NaiveDate::parse_from_str("Fri, 09 Aug 13", "%a, %d %b %y"), | |
2832 | Ok(ymd(2013, 8, 9)) | |
2833 | ); | |
2c00a5a8 XL |
2834 | assert!(NaiveDate::parse_from_str("Sat, 09 Aug 2013", "%a, %d %b %Y").is_err()); |
2835 | assert!(NaiveDate::parse_from_str("2014-57", "%Y-%m-%d").is_err()); | |
2836 | assert!(NaiveDate::parse_from_str("2014", "%Y").is_err()); // insufficient | |
49aad941 FG |
2837 | |
2838 | assert_eq!( | |
2839 | NaiveDate::parse_from_str("2020-01-0", "%Y-%W-%w").ok(), | |
2840 | NaiveDate::from_ymd_opt(2020, 1, 12), | |
2841 | ); | |
2842 | ||
2843 | assert_eq!( | |
2844 | NaiveDate::parse_from_str("2019-01-0", "%Y-%W-%w").ok(), | |
2845 | NaiveDate::from_ymd_opt(2019, 1, 13), | |
2846 | ); | |
2c00a5a8 XL |
2847 | } |
2848 | ||
2849 | #[test] | |
2850 | fn test_date_format() { | |
49aad941 | 2851 | let d = NaiveDate::from_ymd_opt(2012, 3, 4).unwrap(); |
2c00a5a8 XL |
2852 | assert_eq!(d.format("%Y,%C,%y,%G,%g").to_string(), "2012,20,12,2012,12"); |
2853 | assert_eq!(d.format("%m,%b,%h,%B").to_string(), "03,Mar,Mar,March"); | |
2854 | assert_eq!(d.format("%d,%e").to_string(), "04, 4"); | |
2855 | assert_eq!(d.format("%U,%W,%V").to_string(), "10,09,09"); | |
2856 | assert_eq!(d.format("%a,%A,%w,%u").to_string(), "Sun,Sunday,0,7"); | |
2857 | assert_eq!(d.format("%j").to_string(), "064"); // since 2012 is a leap year | |
2858 | assert_eq!(d.format("%D,%x").to_string(), "03/04/12,03/04/12"); | |
2859 | assert_eq!(d.format("%F").to_string(), "2012-03-04"); | |
2860 | assert_eq!(d.format("%v").to_string(), " 4-Mar-2012"); | |
2861 | assert_eq!(d.format("%t%n%%%n%t").to_string(), "\t\n%\n\t"); | |
2862 | ||
2863 | // non-four-digit years | |
49aad941 FG |
2864 | assert_eq!( |
2865 | NaiveDate::from_ymd_opt(12345, 1, 1).unwrap().format("%Y").to_string(), | |
2866 | "+12345" | |
2867 | ); | |
2868 | assert_eq!(NaiveDate::from_ymd_opt(1234, 1, 1).unwrap().format("%Y").to_string(), "1234"); | |
2869 | assert_eq!(NaiveDate::from_ymd_opt(123, 1, 1).unwrap().format("%Y").to_string(), "0123"); | |
2870 | assert_eq!(NaiveDate::from_ymd_opt(12, 1, 1).unwrap().format("%Y").to_string(), "0012"); | |
2871 | assert_eq!(NaiveDate::from_ymd_opt(1, 1, 1).unwrap().format("%Y").to_string(), "0001"); | |
2872 | assert_eq!(NaiveDate::from_ymd_opt(0, 1, 1).unwrap().format("%Y").to_string(), "0000"); | |
2873 | assert_eq!(NaiveDate::from_ymd_opt(-1, 1, 1).unwrap().format("%Y").to_string(), "-0001"); | |
2874 | assert_eq!(NaiveDate::from_ymd_opt(-12, 1, 1).unwrap().format("%Y").to_string(), "-0012"); | |
2875 | assert_eq!(NaiveDate::from_ymd_opt(-123, 1, 1).unwrap().format("%Y").to_string(), "-0123"); | |
2876 | assert_eq!(NaiveDate::from_ymd_opt(-1234, 1, 1).unwrap().format("%Y").to_string(), "-1234"); | |
2877 | assert_eq!( | |
2878 | NaiveDate::from_ymd_opt(-12345, 1, 1).unwrap().format("%Y").to_string(), | |
2879 | "-12345" | |
2880 | ); | |
2c00a5a8 XL |
2881 | |
2882 | // corner cases | |
f035d41b | 2883 | assert_eq!( |
49aad941 FG |
2884 | NaiveDate::from_ymd_opt(2007, 12, 31).unwrap().format("%G,%g,%U,%W,%V").to_string(), |
2885 | "2008,08,52,53,01" | |
f035d41b XL |
2886 | ); |
2887 | assert_eq!( | |
49aad941 | 2888 | NaiveDate::from_ymd_opt(2010, 1, 3).unwrap().format("%G,%g,%U,%W,%V").to_string(), |
f035d41b XL |
2889 | "2009,09,01,00,53" |
2890 | ); | |
2c00a5a8 | 2891 | } |
3dfed10e XL |
2892 | |
2893 | #[test] | |
2894 | fn test_day_iterator_limit() { | |
49aad941 | 2895 | assert_eq!(NaiveDate::from_ymd_opt(262143, 12, 29).unwrap().iter_days().take(4).count(), 2); |
3dfed10e | 2896 | assert_eq!( |
49aad941 | 2897 | NaiveDate::from_ymd_opt(-262144, 1, 3).unwrap().iter_days().rev().take(4).count(), |
3dfed10e XL |
2898 | 2 |
2899 | ); | |
2900 | } | |
2901 | ||
2902 | #[test] | |
2903 | fn test_week_iterator_limit() { | |
2904 | assert_eq!( | |
49aad941 FG |
2905 | NaiveDate::from_ymd_opt(262143, 12, 12).unwrap().iter_weeks().take(4).count(), |
2906 | 2 | |
2907 | ); | |
2908 | assert_eq!( | |
2909 | NaiveDate::from_ymd_opt(-262144, 1, 15).unwrap().iter_weeks().rev().take(4).count(), | |
3dfed10e XL |
2910 | 2 |
2911 | ); | |
2912 | } | |
49aad941 FG |
2913 | |
2914 | #[test] | |
2915 | fn test_naiveweek() { | |
2916 | let date = NaiveDate::from_ymd_opt(2022, 5, 18).unwrap(); | |
2917 | let asserts = vec![ | |
2918 | (Weekday::Mon, "2022-05-16", "2022-05-22"), | |
2919 | (Weekday::Tue, "2022-05-17", "2022-05-23"), | |
2920 | (Weekday::Wed, "2022-05-18", "2022-05-24"), | |
2921 | (Weekday::Thu, "2022-05-12", "2022-05-18"), | |
2922 | (Weekday::Fri, "2022-05-13", "2022-05-19"), | |
2923 | (Weekday::Sat, "2022-05-14", "2022-05-20"), | |
2924 | (Weekday::Sun, "2022-05-15", "2022-05-21"), | |
2925 | ]; | |
2926 | for (start, first_day, last_day) in asserts { | |
2927 | let week = date.week(start); | |
2928 | let days = week.days(); | |
2929 | assert_eq!(Ok(week.first_day()), NaiveDate::parse_from_str(first_day, "%Y-%m-%d")); | |
2930 | assert_eq!(Ok(week.last_day()), NaiveDate::parse_from_str(last_day, "%Y-%m-%d")); | |
2931 | assert!(days.contains(&date)); | |
2932 | } | |
2933 | } | |
2934 | ||
2935 | #[test] | |
2936 | fn test_weeks_from() { | |
2937 | // tests per: https://github.com/chronotope/chrono/issues/961 | |
2938 | // these internally use `weeks_from` via the parsing infrastructure | |
2939 | assert_eq!( | |
2940 | NaiveDate::parse_from_str("2020-01-0", "%Y-%W-%w").ok(), | |
2941 | NaiveDate::from_ymd_opt(2020, 1, 12), | |
2942 | ); | |
2943 | assert_eq!( | |
2944 | NaiveDate::parse_from_str("2019-01-0", "%Y-%W-%w").ok(), | |
2945 | NaiveDate::from_ymd_opt(2019, 1, 13), | |
2946 | ); | |
2947 | ||
2948 | // direct tests | |
2949 | for (y, starts_on) in &[ | |
2950 | (2019, Weekday::Tue), | |
2951 | (2020, Weekday::Wed), | |
2952 | (2021, Weekday::Fri), | |
2953 | (2022, Weekday::Sat), | |
2954 | (2023, Weekday::Sun), | |
2955 | (2024, Weekday::Mon), | |
2956 | (2025, Weekday::Wed), | |
2957 | (2026, Weekday::Thu), | |
2958 | ] { | |
2959 | for day in &[ | |
2960 | Weekday::Mon, | |
2961 | Weekday::Tue, | |
2962 | Weekday::Wed, | |
2963 | Weekday::Thu, | |
2964 | Weekday::Fri, | |
2965 | Weekday::Sat, | |
2966 | Weekday::Sun, | |
2967 | ] { | |
2968 | assert_eq!( | |
2969 | NaiveDate::from_ymd_opt(*y, 1, 1).map(|d| d.weeks_from(*day)), | |
2970 | Some(if day == starts_on { 1 } else { 0 }) | |
2971 | ); | |
2972 | ||
2973 | // last day must always be in week 52 or 53 | |
2974 | assert!([52, 53] | |
2975 | .contains(&NaiveDate::from_ymd_opt(*y, 12, 31).unwrap().weeks_from(*day)),); | |
2976 | } | |
2977 | } | |
2978 | ||
2979 | let base = NaiveDate::from_ymd_opt(2019, 1, 1).unwrap(); | |
2980 | ||
2981 | // 400 years covers all year types | |
2982 | for day in &[ | |
2983 | Weekday::Mon, | |
2984 | Weekday::Tue, | |
2985 | Weekday::Wed, | |
2986 | Weekday::Thu, | |
2987 | Weekday::Fri, | |
2988 | Weekday::Sat, | |
2989 | Weekday::Sun, | |
2990 | ] { | |
2991 | // must always be below 54 | |
2992 | for dplus in 1..(400 * 366) { | |
2993 | assert!((base + Days::new(dplus)).weeks_from(*day) < 54) | |
2994 | } | |
2995 | } | |
2996 | } | |
2c00a5a8 | 2997 | } |