// This is a part of Chrono. // See README.md and LICENSE.txt for details. //! ISO 8601 calendar date without timezone. #[cfg(any(feature = "alloc", feature = "std", test))] use core::borrow::Borrow; use core::ops::{Add, AddAssign, Sub, SubAssign}; use core::{fmt, str}; use num_traits::ToPrimitive; use oldtime::Duration as OldDuration; use div::div_mod_floor; #[cfg(any(feature = "alloc", feature = "std", test))] use format::DelayedFormat; use format::{parse, ParseError, ParseResult, Parsed, StrftimeItems}; use format::{Item, Numeric, Pad}; use naive::{IsoWeek, NaiveDateTime, NaiveTime}; use {Datelike, Weekday}; use super::internals::{self, DateImpl, Mdf, Of, YearFlags}; use super::isoweek; const MAX_YEAR: i32 = internals::MAX_YEAR; const MIN_YEAR: i32 = internals::MIN_YEAR; // MAX_YEAR-12-31 minus 0000-01-01 // = ((MAX_YEAR+1)-01-01 minus 0001-01-01) + (0001-01-01 minus 0000-01-01) - 1 day // = ((MAX_YEAR+1)-01-01 minus 0001-01-01) + 365 days // = MAX_YEAR * 365 + (# of leap years from 0001 to MAX_YEAR) + 365 days #[cfg(test)] // only used for testing const MAX_DAYS_FROM_YEAR_0: i32 = MAX_YEAR * 365 + MAX_YEAR / 4 - MAX_YEAR / 100 + MAX_YEAR / 400 + 365; // MIN_YEAR-01-01 minus 0000-01-01 // = (MIN_YEAR+400n+1)-01-01 minus (400n+1)-01-01 // = ((MIN_YEAR+400n+1)-01-01 minus 0001-01-01) - ((400n+1)-01-01 minus 0001-01-01) // = ((MIN_YEAR+400n+1)-01-01 minus 0001-01-01) - 146097n days // // n is set to 1000 for convenience. #[cfg(test)] // only used for testing const MIN_DAYS_FROM_YEAR_0: i32 = (MIN_YEAR + 400_000) * 365 + (MIN_YEAR + 400_000) / 4 - (MIN_YEAR + 400_000) / 100 + (MIN_YEAR + 400_000) / 400 - 146097_000; #[cfg(test)] // only used for testing, but duplicated in naive::datetime const MAX_BITS: usize = 44; /// ISO 8601 calendar date without timezone. /// Allows for every [proleptic Gregorian date](#calendar-date) /// from Jan 1, 262145 BCE to Dec 31, 262143 CE. /// Also supports the conversion from ISO 8601 ordinal and week date. /// /// # Calendar Date /// /// The ISO 8601 **calendar date** follows the proleptic Gregorian calendar. /// It is like a normal civil calendar but note some slight differences: /// /// * Dates before the Gregorian calendar's inception in 1582 are defined via the extrapolation. /// Be careful, as historical dates are often noted in the Julian calendar and others /// and the transition to Gregorian may differ across countries (as late as early 20C). /// /// (Some example: Both Shakespeare from Britain and Cervantes from Spain seemingly died /// on the same calendar date---April 23, 1616---but in the different calendar. /// Britain used the Julian calendar at that time, so Shakespeare's death is later.) /// /// * ISO 8601 calendars has the year 0, which is 1 BCE (a year before 1 CE). /// If you need a typical BCE/BC and CE/AD notation for year numbers, /// use the [`Datelike::year_ce`](../trait.Datelike.html#method.year_ce) method. /// /// # Week Date /// /// The ISO 8601 **week date** is a triple of year number, week number /// and [day of the week](../enum.Weekday.html) with the following rules: /// /// * A week consists of Monday through Sunday, and is always numbered within some year. /// The week number ranges from 1 to 52 or 53 depending on the year. /// /// * The week 1 of given year is defined as the first week containing January 4 of that year, /// or equivalently, the first week containing four or more days in that year. /// /// * The year number in the week date may *not* correspond to the actual Gregorian year. /// For example, January 3, 2016 (Sunday) was on the last (53rd) week of 2015. /// /// Chrono's date types default to the ISO 8601 [calendar date](#calendar-date), /// but [`Datelike::iso_week`](../trait.Datelike.html#tymethod.iso_week) and /// [`Datelike::weekday`](../trait.Datelike.html#tymethod.weekday) methods /// can be used to get the corresponding week date. /// /// # Ordinal Date /// /// The ISO 8601 **ordinal date** is a pair of year number and day of the year ("ordinal"). /// The ordinal number ranges from 1 to 365 or 366 depending on the year. /// The year number is the same as that of the [calendar date](#calendar-date). /// /// This is currently the internal format of Chrono's date types. #[derive(PartialEq, Eq, Hash, PartialOrd, Ord, Copy, Clone)] pub struct NaiveDate { ymdf: DateImpl, // (year << 13) | of } /// The minimum possible `NaiveDate` (January 1, 262145 BCE). pub const MIN_DATE: NaiveDate = NaiveDate { ymdf: (MIN_YEAR << 13) | (1 << 4) | 0o07 /*FE*/ }; /// The maximum possible `NaiveDate` (December 31, 262143 CE). pub const MAX_DATE: NaiveDate = NaiveDate { ymdf: (MAX_YEAR << 13) | (365 << 4) | 0o17 /*F*/ }; // as it is hard to verify year flags in `MIN_DATE` and `MAX_DATE`, // we use a separate run-time test. #[test] fn test_date_bounds() { let calculated_min = NaiveDate::from_ymd(MIN_YEAR, 1, 1); let calculated_max = NaiveDate::from_ymd(MAX_YEAR, 12, 31); assert!( MIN_DATE == calculated_min, "`MIN_DATE` should have a year flag {:?}", calculated_min.of().flags() ); assert!( MAX_DATE == calculated_max, "`MAX_DATE` should have a year flag {:?}", calculated_max.of().flags() ); // let's also check that the entire range do not exceed 2^44 seconds // (sometimes used for bounding `Duration` against overflow) let maxsecs = MAX_DATE.signed_duration_since(MIN_DATE).num_seconds(); let maxsecs = maxsecs + 86401; // also take care of DateTime assert!( maxsecs < (1 << MAX_BITS), "The entire `NaiveDate` range somehow exceeds 2^{} seconds", MAX_BITS ); } impl NaiveDate { /// Makes a new `NaiveDate` from year and packed ordinal-flags, with a verification. fn from_of(year: i32, of: Of) -> Option { if year >= MIN_YEAR && year <= MAX_YEAR && of.valid() { let Of(of) = of; Some(NaiveDate { ymdf: (year << 13) | (of as DateImpl) }) } else { None } } /// Makes a new `NaiveDate` from year and packed month-day-flags, with a verification. fn from_mdf(year: i32, mdf: Mdf) -> Option { NaiveDate::from_of(year, mdf.to_of()) } /// Makes a new `NaiveDate` from the [calendar date](#calendar-date) /// (year, month and day). /// /// Panics on the out-of-range date, invalid month and/or day. /// /// # Example /// /// ~~~~ /// use chrono::{NaiveDate, Datelike, Weekday}; /// /// let d = NaiveDate::from_ymd(2015, 3, 14); /// assert_eq!(d.year(), 2015); /// assert_eq!(d.month(), 3); /// assert_eq!(d.day(), 14); /// assert_eq!(d.ordinal(), 73); // day of year /// assert_eq!(d.iso_week().year(), 2015); /// assert_eq!(d.iso_week().week(), 11); /// assert_eq!(d.weekday(), Weekday::Sat); /// assert_eq!(d.num_days_from_ce(), 735671); // days since January 1, 1 CE /// ~~~~ pub fn from_ymd(year: i32, month: u32, day: u32) -> NaiveDate { NaiveDate::from_ymd_opt(year, month, day).expect("invalid or out-of-range date") } /// Makes a new `NaiveDate` from the [calendar date](#calendar-date) /// (year, month and day). /// /// Returns `None` on the out-of-range date, invalid month and/or day. /// /// # Example /// /// ~~~~ /// use chrono::NaiveDate; /// /// let from_ymd_opt = NaiveDate::from_ymd_opt; /// /// assert!(from_ymd_opt(2015, 3, 14).is_some()); /// assert!(from_ymd_opt(2015, 0, 14).is_none()); /// assert!(from_ymd_opt(2015, 2, 29).is_none()); /// assert!(from_ymd_opt(-4, 2, 29).is_some()); // 5 BCE is a leap year /// assert!(from_ymd_opt(400000, 1, 1).is_none()); /// assert!(from_ymd_opt(-400000, 1, 1).is_none()); /// ~~~~ pub fn from_ymd_opt(year: i32, month: u32, day: u32) -> Option { let flags = YearFlags::from_year(year); NaiveDate::from_mdf(year, Mdf::new(month, day, flags)) } /// Makes a new `NaiveDate` from the [ordinal date](#ordinal-date) /// (year and day of the year). /// /// Panics on the out-of-range date and/or invalid day of year. /// /// # Example /// /// ~~~~ /// use chrono::{NaiveDate, Datelike, Weekday}; /// /// let d = NaiveDate::from_yo(2015, 73); /// assert_eq!(d.ordinal(), 73); /// assert_eq!(d.year(), 2015); /// assert_eq!(d.month(), 3); /// assert_eq!(d.day(), 14); /// assert_eq!(d.iso_week().year(), 2015); /// assert_eq!(d.iso_week().week(), 11); /// assert_eq!(d.weekday(), Weekday::Sat); /// assert_eq!(d.num_days_from_ce(), 735671); // days since January 1, 1 CE /// ~~~~ pub fn from_yo(year: i32, ordinal: u32) -> NaiveDate { NaiveDate::from_yo_opt(year, ordinal).expect("invalid or out-of-range date") } /// Makes a new `NaiveDate` from the [ordinal date](#ordinal-date) /// (year and day of the year). /// /// Returns `None` on the out-of-range date and/or invalid day of year. /// /// # Example /// /// ~~~~ /// use chrono::NaiveDate; /// /// let from_yo_opt = NaiveDate::from_yo_opt; /// /// assert!(from_yo_opt(2015, 100).is_some()); /// assert!(from_yo_opt(2015, 0).is_none()); /// assert!(from_yo_opt(2015, 365).is_some()); /// assert!(from_yo_opt(2015, 366).is_none()); /// assert!(from_yo_opt(-4, 366).is_some()); // 5 BCE is a leap year /// assert!(from_yo_opt(400000, 1).is_none()); /// assert!(from_yo_opt(-400000, 1).is_none()); /// ~~~~ pub fn from_yo_opt(year: i32, ordinal: u32) -> Option { let flags = YearFlags::from_year(year); NaiveDate::from_of(year, Of::new(ordinal, flags)) } /// Makes a new `NaiveDate` from the [ISO week date](#week-date) /// (year, week number and day of the week). /// The resulting `NaiveDate` may have a different year from the input year. /// /// Panics on the out-of-range date and/or invalid week number. /// /// # Example /// /// ~~~~ /// use chrono::{NaiveDate, Datelike, Weekday}; /// /// let d = NaiveDate::from_isoywd(2015, 11, Weekday::Sat); /// assert_eq!(d.iso_week().year(), 2015); /// assert_eq!(d.iso_week().week(), 11); /// assert_eq!(d.weekday(), Weekday::Sat); /// assert_eq!(d.year(), 2015); /// assert_eq!(d.month(), 3); /// assert_eq!(d.day(), 14); /// assert_eq!(d.ordinal(), 73); // day of year /// assert_eq!(d.num_days_from_ce(), 735671); // days since January 1, 1 CE /// ~~~~ pub fn from_isoywd(year: i32, week: u32, weekday: Weekday) -> NaiveDate { NaiveDate::from_isoywd_opt(year, week, weekday).expect("invalid or out-of-range date") } /// Makes a new `NaiveDate` from the [ISO week date](#week-date) /// (year, week number and day of the week). /// The resulting `NaiveDate` may have a different year from the input year. /// /// Returns `None` on the out-of-range date and/or invalid week number. /// /// # Example /// /// ~~~~ /// use chrono::{NaiveDate, Weekday}; /// /// let from_ymd = NaiveDate::from_ymd; /// let from_isoywd_opt = NaiveDate::from_isoywd_opt; /// /// assert_eq!(from_isoywd_opt(2015, 0, Weekday::Sun), None); /// assert_eq!(from_isoywd_opt(2015, 10, Weekday::Sun), Some(from_ymd(2015, 3, 8))); /// assert_eq!(from_isoywd_opt(2015, 30, Weekday::Mon), Some(from_ymd(2015, 7, 20))); /// assert_eq!(from_isoywd_opt(2015, 60, Weekday::Mon), None); /// /// assert_eq!(from_isoywd_opt(400000, 10, Weekday::Fri), None); /// assert_eq!(from_isoywd_opt(-400000, 10, Weekday::Sat), None); /// ~~~~ /// /// The year number of ISO week date may differ from that of the calendar date. /// /// ~~~~ /// # use chrono::{NaiveDate, Weekday}; /// # let from_ymd = NaiveDate::from_ymd; /// # let from_isoywd_opt = NaiveDate::from_isoywd_opt; /// // Mo Tu We Th Fr Sa Su /// // 2014-W52 22 23 24 25 26 27 28 has 4+ days of new year, /// // 2015-W01 29 30 31 1 2 3 4 <- so this is the first week /// assert_eq!(from_isoywd_opt(2014, 52, Weekday::Sun), Some(from_ymd(2014, 12, 28))); /// assert_eq!(from_isoywd_opt(2014, 53, Weekday::Mon), None); /// assert_eq!(from_isoywd_opt(2015, 1, Weekday::Mon), Some(from_ymd(2014, 12, 29))); /// /// // 2015-W52 21 22 23 24 25 26 27 has 4+ days of old year, /// // 2015-W53 28 29 30 31 1 2 3 <- so this is the last week /// // 2016-W01 4 5 6 7 8 9 10 /// assert_eq!(from_isoywd_opt(2015, 52, Weekday::Sun), Some(from_ymd(2015, 12, 27))); /// assert_eq!(from_isoywd_opt(2015, 53, Weekday::Sun), Some(from_ymd(2016, 1, 3))); /// assert_eq!(from_isoywd_opt(2015, 54, Weekday::Mon), None); /// assert_eq!(from_isoywd_opt(2016, 1, Weekday::Mon), Some(from_ymd(2016, 1, 4))); /// ~~~~ pub fn from_isoywd_opt(year: i32, week: u32, weekday: Weekday) -> Option { let flags = YearFlags::from_year(year); let nweeks = flags.nisoweeks(); if 1 <= week && week <= nweeks { // ordinal = week ordinal - delta let weekord = week * 7 + weekday as u32; let delta = flags.isoweek_delta(); if weekord <= delta { // ordinal < 1, previous year let prevflags = YearFlags::from_year(year - 1); NaiveDate::from_of( year - 1, Of::new(weekord + prevflags.ndays() - delta, prevflags), ) } else { let ordinal = weekord - delta; let ndays = flags.ndays(); if ordinal <= ndays { // this year NaiveDate::from_of(year, Of::new(ordinal, flags)) } else { // ordinal > ndays, next year let nextflags = YearFlags::from_year(year + 1); NaiveDate::from_of(year + 1, Of::new(ordinal - ndays, nextflags)) } } } else { None } } /// Makes a new `NaiveDate` from a day's number in the proleptic Gregorian calendar, with /// January 1, 1 being day 1. /// /// Panics if the date is out of range. /// /// # Example /// /// ~~~~ /// use chrono::{NaiveDate, Datelike, Weekday}; /// /// let d = NaiveDate::from_num_days_from_ce(735671); /// assert_eq!(d.num_days_from_ce(), 735671); // days since January 1, 1 CE /// assert_eq!(d.year(), 2015); /// assert_eq!(d.month(), 3); /// assert_eq!(d.day(), 14); /// assert_eq!(d.ordinal(), 73); // day of year /// assert_eq!(d.iso_week().year(), 2015); /// assert_eq!(d.iso_week().week(), 11); /// assert_eq!(d.weekday(), Weekday::Sat); /// ~~~~ /// /// While not directly supported by Chrono, /// it is easy to convert from the Julian day number /// (January 1, 4713 BCE in the *Julian* calendar being Day 0) /// to Gregorian with this method. /// (Note that this panics when `jd` is out of range.) /// /// ~~~~ /// use chrono::NaiveDate; /// /// fn jd_to_date(jd: i32) -> NaiveDate { /// // keep in mind that the Julian day number is 0-based /// // while this method requires an 1-based number. /// NaiveDate::from_num_days_from_ce(jd - 1721425) /// } /// /// // January 1, 4713 BCE in Julian = November 24, 4714 BCE in Gregorian /// assert_eq!(jd_to_date(0), NaiveDate::from_ymd(-4713, 11, 24)); /// /// assert_eq!(jd_to_date(1721426), NaiveDate::from_ymd(1, 1, 1)); /// assert_eq!(jd_to_date(2450000), NaiveDate::from_ymd(1995, 10, 9)); /// assert_eq!(jd_to_date(2451545), NaiveDate::from_ymd(2000, 1, 1)); /// ~~~~ #[inline] pub fn from_num_days_from_ce(days: i32) -> NaiveDate { NaiveDate::from_num_days_from_ce_opt(days).expect("out-of-range date") } /// Makes a new `NaiveDate` from a day's number in the proleptic Gregorian calendar, with /// January 1, 1 being day 1. /// /// Returns `None` if the date is out of range. /// /// # Example /// /// ~~~~ /// use chrono::NaiveDate; /// /// let from_ndays_opt = NaiveDate::from_num_days_from_ce_opt; /// let from_ymd = NaiveDate::from_ymd; /// /// assert_eq!(from_ndays_opt(730_000), Some(from_ymd(1999, 9, 3))); /// assert_eq!(from_ndays_opt(1), Some(from_ymd(1, 1, 1))); /// assert_eq!(from_ndays_opt(0), Some(from_ymd(0, 12, 31))); /// assert_eq!(from_ndays_opt(-1), Some(from_ymd(0, 12, 30))); /// assert_eq!(from_ndays_opt(100_000_000), None); /// assert_eq!(from_ndays_opt(-100_000_000), None); /// ~~~~ pub fn from_num_days_from_ce_opt(days: i32) -> Option { let days = days + 365; // make December 31, 1 BCE equal to day 0 let (year_div_400, cycle) = div_mod_floor(days, 146_097); let (year_mod_400, ordinal) = internals::cycle_to_yo(cycle as u32); let flags = YearFlags::from_year_mod_400(year_mod_400 as i32); NaiveDate::from_of(year_div_400 * 400 + year_mod_400 as i32, Of::new(ordinal, flags)) } /// Makes a new `NaiveDate` by counting the number of occurrences of a particular day-of-week /// since the beginning of the given month. For instance, if you want the 2nd Friday of March /// 2017, you would use `NaiveDate::from_weekday_of_month(2017, 3, Weekday::Fri, 2)`. /// /// # Panics /// /// The resulting `NaiveDate` is guaranteed to be in `month`. If `n` is larger than the number /// of `weekday` in `month` (eg. the 6th Friday of March 2017) then this function will panic. /// /// `n` is 1-indexed. Passing `n=0` will cause a panic. /// /// # Example /// /// ~~~~ /// use chrono::{NaiveDate, Weekday}; /// /// let from_weekday_of_month = NaiveDate::from_weekday_of_month; /// let from_ymd = NaiveDate::from_ymd; /// /// assert_eq!(from_weekday_of_month(2018, 8, Weekday::Wed, 1), from_ymd(2018, 8, 1)); /// assert_eq!(from_weekday_of_month(2018, 8, Weekday::Fri, 1), from_ymd(2018, 8, 3)); /// assert_eq!(from_weekday_of_month(2018, 8, Weekday::Tue, 2), from_ymd(2018, 8, 14)); /// assert_eq!(from_weekday_of_month(2018, 8, Weekday::Fri, 4), from_ymd(2018, 8, 24)); /// assert_eq!(from_weekday_of_month(2018, 8, Weekday::Fri, 5), from_ymd(2018, 8, 31)); /// ~~~~ pub fn from_weekday_of_month(year: i32, month: u32, weekday: Weekday, n: u8) -> NaiveDate { NaiveDate::from_weekday_of_month_opt(year, month, weekday, n).expect("out-of-range date") } /// Makes a new `NaiveDate` by counting the number of occurrences of a particular day-of-week /// since the beginning of the given month. For instance, if you want the 2nd Friday of March /// 2017, you would use `NaiveDate::from_weekday_of_month(2017, 3, Weekday::Fri, 2)`. `n` is 1-indexed. /// /// ~~~~ /// use chrono::{NaiveDate, Weekday}; /// assert_eq!(NaiveDate::from_weekday_of_month_opt(2017, 3, Weekday::Fri, 2), /// NaiveDate::from_ymd_opt(2017, 3, 10)) /// ~~~~ /// /// Returns `None` if `n` out-of-range; ie. if `n` is larger than the number of `weekday` in /// `month` (eg. the 6th Friday of March 2017), or if `n == 0`. pub fn from_weekday_of_month_opt( year: i32, month: u32, weekday: Weekday, n: u8, ) -> Option { if n == 0 { return None; } let first = NaiveDate::from_ymd(year, month, 1).weekday(); let first_to_dow = (7 + weekday.number_from_monday() - first.number_from_monday()) % 7; let day = (u32::from(n) - 1) * 7 + first_to_dow + 1; NaiveDate::from_ymd_opt(year, month, day) } /// Parses a string with the specified format string and returns a new `NaiveDate`. /// See the [`format::strftime` module](../format/strftime/index.html) /// on the supported escape sequences. /// /// # Example /// /// ~~~~ /// use chrono::NaiveDate; /// /// let parse_from_str = NaiveDate::parse_from_str; /// /// assert_eq!(parse_from_str("2015-09-05", "%Y-%m-%d"), /// Ok(NaiveDate::from_ymd(2015, 9, 5))); /// assert_eq!(parse_from_str("5sep2015", "%d%b%Y"), /// Ok(NaiveDate::from_ymd(2015, 9, 5))); /// ~~~~ /// /// Time and offset is ignored for the purpose of parsing. /// /// ~~~~ /// # use chrono::NaiveDate; /// # let parse_from_str = NaiveDate::parse_from_str; /// assert_eq!(parse_from_str("2014-5-17T12:34:56+09:30", "%Y-%m-%dT%H:%M:%S%z"), /// Ok(NaiveDate::from_ymd(2014, 5, 17))); /// ~~~~ /// /// Out-of-bound dates or insufficient fields are errors. /// /// ~~~~ /// # use chrono::NaiveDate; /// # let parse_from_str = NaiveDate::parse_from_str; /// assert!(parse_from_str("2015/9", "%Y/%m").is_err()); /// assert!(parse_from_str("2015/9/31", "%Y/%m/%d").is_err()); /// ~~~~ /// /// All parsed fields should be consistent to each other, otherwise it's an error. /// /// ~~~~ /// # use chrono::NaiveDate; /// # let parse_from_str = NaiveDate::parse_from_str; /// assert!(parse_from_str("Sat, 09 Aug 2013", "%a, %d %b %Y").is_err()); /// ~~~~ pub fn parse_from_str(s: &str, fmt: &str) -> ParseResult { let mut parsed = Parsed::new(); parse(&mut parsed, s, StrftimeItems::new(fmt))?; parsed.to_naive_date() } /// Makes a new `NaiveDateTime` from the current date and given `NaiveTime`. /// /// # Example /// /// ~~~~ /// use chrono::{NaiveDate, NaiveTime, NaiveDateTime}; /// /// let d = NaiveDate::from_ymd(2015, 6, 3); /// let t = NaiveTime::from_hms_milli(12, 34, 56, 789); /// /// let dt: NaiveDateTime = d.and_time(t); /// assert_eq!(dt.date(), d); /// assert_eq!(dt.time(), t); /// ~~~~ #[inline] pub fn and_time(&self, time: NaiveTime) -> NaiveDateTime { NaiveDateTime::new(*self, time) } /// Makes a new `NaiveDateTime` from the current date, hour, minute and second. /// /// No [leap second](./struct.NaiveTime.html#leap-second-handling) is allowed here; /// use `NaiveDate::and_hms_*` methods with a subsecond parameter instead. /// /// Panics on invalid hour, minute and/or second. /// /// # Example /// /// ~~~~ /// use chrono::{NaiveDate, NaiveDateTime, Datelike, Timelike, Weekday}; /// /// let d = NaiveDate::from_ymd(2015, 6, 3); /// /// let dt: NaiveDateTime = d.and_hms(12, 34, 56); /// assert_eq!(dt.year(), 2015); /// assert_eq!(dt.weekday(), Weekday::Wed); /// assert_eq!(dt.second(), 56); /// ~~~~ #[inline] pub fn and_hms(&self, hour: u32, min: u32, sec: u32) -> NaiveDateTime { self.and_hms_opt(hour, min, sec).expect("invalid time") } /// Makes a new `NaiveDateTime` from the current date, hour, minute and second. /// /// No [leap second](./struct.NaiveTime.html#leap-second-handling) is allowed here; /// use `NaiveDate::and_hms_*_opt` methods with a subsecond parameter instead. /// /// Returns `None` on invalid hour, minute and/or second. /// /// # Example /// /// ~~~~ /// use chrono::NaiveDate; /// /// let d = NaiveDate::from_ymd(2015, 6, 3); /// assert!(d.and_hms_opt(12, 34, 56).is_some()); /// assert!(d.and_hms_opt(12, 34, 60).is_none()); // use `and_hms_milli_opt` instead /// assert!(d.and_hms_opt(12, 60, 56).is_none()); /// assert!(d.and_hms_opt(24, 34, 56).is_none()); /// ~~~~ #[inline] pub fn and_hms_opt(&self, hour: u32, min: u32, sec: u32) -> Option { NaiveTime::from_hms_opt(hour, min, sec).map(|time| self.and_time(time)) } /// Makes a new `NaiveDateTime` from the current date, hour, minute, second and millisecond. /// /// The millisecond part can exceed 1,000 /// in order to represent the [leap second](./struct.NaiveTime.html#leap-second-handling). /// /// Panics on invalid hour, minute, second and/or millisecond. /// /// # Example /// /// ~~~~ /// use chrono::{NaiveDate, NaiveDateTime, Datelike, Timelike, Weekday}; /// /// let d = NaiveDate::from_ymd(2015, 6, 3); /// /// let dt: NaiveDateTime = d.and_hms_milli(12, 34, 56, 789); /// assert_eq!(dt.year(), 2015); /// assert_eq!(dt.weekday(), Weekday::Wed); /// assert_eq!(dt.second(), 56); /// assert_eq!(dt.nanosecond(), 789_000_000); /// ~~~~ #[inline] pub fn and_hms_milli(&self, hour: u32, min: u32, sec: u32, milli: u32) -> NaiveDateTime { self.and_hms_milli_opt(hour, min, sec, milli).expect("invalid time") } /// Makes a new `NaiveDateTime` from the current date, hour, minute, second and millisecond. /// /// The millisecond part can exceed 1,000 /// in order to represent the [leap second](./struct.NaiveTime.html#leap-second-handling). /// /// Returns `None` on invalid hour, minute, second and/or millisecond. /// /// # Example /// /// ~~~~ /// use chrono::NaiveDate; /// /// let d = NaiveDate::from_ymd(2015, 6, 3); /// assert!(d.and_hms_milli_opt(12, 34, 56, 789).is_some()); /// assert!(d.and_hms_milli_opt(12, 34, 59, 1_789).is_some()); // leap second /// assert!(d.and_hms_milli_opt(12, 34, 59, 2_789).is_none()); /// assert!(d.and_hms_milli_opt(12, 34, 60, 789).is_none()); /// assert!(d.and_hms_milli_opt(12, 60, 56, 789).is_none()); /// assert!(d.and_hms_milli_opt(24, 34, 56, 789).is_none()); /// ~~~~ #[inline] pub fn and_hms_milli_opt( &self, hour: u32, min: u32, sec: u32, milli: u32, ) -> Option { NaiveTime::from_hms_milli_opt(hour, min, sec, milli).map(|time| self.and_time(time)) } /// Makes a new `NaiveDateTime` from the current date, hour, minute, second and microsecond. /// /// The microsecond part can exceed 1,000,000 /// in order to represent the [leap second](./struct.NaiveTime.html#leap-second-handling). /// /// Panics on invalid hour, minute, second and/or microsecond. /// /// # Example /// /// ~~~~ /// use chrono::{NaiveDate, NaiveDateTime, Datelike, Timelike, Weekday}; /// /// let d = NaiveDate::from_ymd(2015, 6, 3); /// /// let dt: NaiveDateTime = d.and_hms_micro(12, 34, 56, 789_012); /// assert_eq!(dt.year(), 2015); /// assert_eq!(dt.weekday(), Weekday::Wed); /// assert_eq!(dt.second(), 56); /// assert_eq!(dt.nanosecond(), 789_012_000); /// ~~~~ #[inline] pub fn and_hms_micro(&self, hour: u32, min: u32, sec: u32, micro: u32) -> NaiveDateTime { self.and_hms_micro_opt(hour, min, sec, micro).expect("invalid time") } /// Makes a new `NaiveDateTime` from the current date, hour, minute, second and microsecond. /// /// The microsecond part can exceed 1,000,000 /// in order to represent the [leap second](./struct.NaiveTime.html#leap-second-handling). /// /// Returns `None` on invalid hour, minute, second and/or microsecond. /// /// # Example /// /// ~~~~ /// use chrono::NaiveDate; /// /// let d = NaiveDate::from_ymd(2015, 6, 3); /// assert!(d.and_hms_micro_opt(12, 34, 56, 789_012).is_some()); /// assert!(d.and_hms_micro_opt(12, 34, 59, 1_789_012).is_some()); // leap second /// assert!(d.and_hms_micro_opt(12, 34, 59, 2_789_012).is_none()); /// assert!(d.and_hms_micro_opt(12, 34, 60, 789_012).is_none()); /// assert!(d.and_hms_micro_opt(12, 60, 56, 789_012).is_none()); /// assert!(d.and_hms_micro_opt(24, 34, 56, 789_012).is_none()); /// ~~~~ #[inline] pub fn and_hms_micro_opt( &self, hour: u32, min: u32, sec: u32, micro: u32, ) -> Option { NaiveTime::from_hms_micro_opt(hour, min, sec, micro).map(|time| self.and_time(time)) } /// Makes a new `NaiveDateTime` from the current date, hour, minute, second and nanosecond. /// /// The nanosecond part can exceed 1,000,000,000 /// in order to represent the [leap second](./struct.NaiveTime.html#leap-second-handling). /// /// Panics on invalid hour, minute, second and/or nanosecond. /// /// # Example /// /// ~~~~ /// use chrono::{NaiveDate, NaiveDateTime, Datelike, Timelike, Weekday}; /// /// let d = NaiveDate::from_ymd(2015, 6, 3); /// /// let dt: NaiveDateTime = d.and_hms_nano(12, 34, 56, 789_012_345); /// assert_eq!(dt.year(), 2015); /// assert_eq!(dt.weekday(), Weekday::Wed); /// assert_eq!(dt.second(), 56); /// assert_eq!(dt.nanosecond(), 789_012_345); /// ~~~~ #[inline] pub fn and_hms_nano(&self, hour: u32, min: u32, sec: u32, nano: u32) -> NaiveDateTime { self.and_hms_nano_opt(hour, min, sec, nano).expect("invalid time") } /// Makes a new `NaiveDateTime` from the current date, hour, minute, second and nanosecond. /// /// The nanosecond part can exceed 1,000,000,000 /// in order to represent the [leap second](./struct.NaiveTime.html#leap-second-handling). /// /// Returns `None` on invalid hour, minute, second and/or nanosecond. /// /// # Example /// /// ~~~~ /// use chrono::NaiveDate; /// /// let d = NaiveDate::from_ymd(2015, 6, 3); /// assert!(d.and_hms_nano_opt(12, 34, 56, 789_012_345).is_some()); /// assert!(d.and_hms_nano_opt(12, 34, 59, 1_789_012_345).is_some()); // leap second /// assert!(d.and_hms_nano_opt(12, 34, 59, 2_789_012_345).is_none()); /// assert!(d.and_hms_nano_opt(12, 34, 60, 789_012_345).is_none()); /// assert!(d.and_hms_nano_opt(12, 60, 56, 789_012_345).is_none()); /// assert!(d.and_hms_nano_opt(24, 34, 56, 789_012_345).is_none()); /// ~~~~ #[inline] pub fn and_hms_nano_opt( &self, hour: u32, min: u32, sec: u32, nano: u32, ) -> Option { NaiveTime::from_hms_nano_opt(hour, min, sec, nano).map(|time| self.and_time(time)) } /// Returns the packed month-day-flags. #[inline] fn mdf(&self) -> Mdf { self.of().to_mdf() } /// Returns the packed ordinal-flags. #[inline] fn of(&self) -> Of { Of((self.ymdf & 0b1_1111_1111_1111) as u32) } /// Makes a new `NaiveDate` with the packed month-day-flags changed. /// /// Returns `None` when the resulting `NaiveDate` would be invalid. #[inline] fn with_mdf(&self, mdf: Mdf) -> Option { self.with_of(mdf.to_of()) } /// Makes a new `NaiveDate` with the packed ordinal-flags changed. /// /// Returns `None` when the resulting `NaiveDate` would be invalid. #[inline] fn with_of(&self, of: Of) -> Option { if of.valid() { let Of(of) = of; Some(NaiveDate { ymdf: (self.ymdf & !0b1_1111_1111_1111) | of as DateImpl }) } else { None } } /// Makes a new `NaiveDate` for the next calendar date. /// /// Panics when `self` is the last representable date. /// /// # Example /// /// ~~~~ /// use chrono::NaiveDate; /// /// assert_eq!(NaiveDate::from_ymd(2015, 6, 3).succ(), NaiveDate::from_ymd(2015, 6, 4)); /// assert_eq!(NaiveDate::from_ymd(2015, 6, 30).succ(), NaiveDate::from_ymd(2015, 7, 1)); /// assert_eq!(NaiveDate::from_ymd(2015, 12, 31).succ(), NaiveDate::from_ymd(2016, 1, 1)); /// ~~~~ #[inline] pub fn succ(&self) -> NaiveDate { self.succ_opt().expect("out of bound") } /// Makes a new `NaiveDate` for the next calendar date. /// /// Returns `None` when `self` is the last representable date. /// /// # Example /// /// ~~~~ /// use chrono::NaiveDate; /// use chrono::naive::MAX_DATE; /// /// assert_eq!(NaiveDate::from_ymd(2015, 6, 3).succ_opt(), /// Some(NaiveDate::from_ymd(2015, 6, 4))); /// assert_eq!(MAX_DATE.succ_opt(), None); /// ~~~~ #[inline] pub fn succ_opt(&self) -> Option { self.with_of(self.of().succ()).or_else(|| NaiveDate::from_ymd_opt(self.year() + 1, 1, 1)) } /// Makes a new `NaiveDate` for the previous calendar date. /// /// Panics when `self` is the first representable date. /// /// # Example /// /// ~~~~ /// use chrono::NaiveDate; /// /// assert_eq!(NaiveDate::from_ymd(2015, 6, 3).pred(), NaiveDate::from_ymd(2015, 6, 2)); /// assert_eq!(NaiveDate::from_ymd(2015, 6, 1).pred(), NaiveDate::from_ymd(2015, 5, 31)); /// assert_eq!(NaiveDate::from_ymd(2015, 1, 1).pred(), NaiveDate::from_ymd(2014, 12, 31)); /// ~~~~ #[inline] pub fn pred(&self) -> NaiveDate { self.pred_opt().expect("out of bound") } /// Makes a new `NaiveDate` for the previous calendar date. /// /// Returns `None` when `self` is the first representable date. /// /// # Example /// /// ~~~~ /// use chrono::NaiveDate; /// use chrono::naive::MIN_DATE; /// /// assert_eq!(NaiveDate::from_ymd(2015, 6, 3).pred_opt(), /// Some(NaiveDate::from_ymd(2015, 6, 2))); /// assert_eq!(MIN_DATE.pred_opt(), None); /// ~~~~ #[inline] pub fn pred_opt(&self) -> Option { self.with_of(self.of().pred()).or_else(|| NaiveDate::from_ymd_opt(self.year() - 1, 12, 31)) } /// Adds the `days` part of given `Duration` to the current date. /// /// Returns `None` when it will result in overflow. /// /// # Example /// /// ~~~~ /// # extern crate chrono; fn main() { /// use chrono::{Duration, NaiveDate}; /// use chrono::naive::MAX_DATE; /// /// let d = NaiveDate::from_ymd(2015, 9, 5); /// assert_eq!(d.checked_add_signed(Duration::days(40)), /// Some(NaiveDate::from_ymd(2015, 10, 15))); /// assert_eq!(d.checked_add_signed(Duration::days(-40)), /// Some(NaiveDate::from_ymd(2015, 7, 27))); /// assert_eq!(d.checked_add_signed(Duration::days(1_000_000_000)), None); /// assert_eq!(d.checked_add_signed(Duration::days(-1_000_000_000)), None); /// assert_eq!(MAX_DATE.checked_add_signed(Duration::days(1)), None); /// # } /// ~~~~ pub fn checked_add_signed(self, rhs: OldDuration) -> Option { let year = self.year(); let (mut year_div_400, year_mod_400) = div_mod_floor(year, 400); let cycle = internals::yo_to_cycle(year_mod_400 as u32, self.of().ordinal()); let cycle = try_opt!((cycle as i32).checked_add(try_opt!(rhs.num_days().to_i32()))); let (cycle_div_400y, cycle) = div_mod_floor(cycle, 146_097); year_div_400 += cycle_div_400y; let (year_mod_400, ordinal) = internals::cycle_to_yo(cycle as u32); let flags = YearFlags::from_year_mod_400(year_mod_400 as i32); NaiveDate::from_of(year_div_400 * 400 + year_mod_400 as i32, Of::new(ordinal, flags)) } /// Subtracts the `days` part of given `Duration` from the current date. /// /// Returns `None` when it will result in overflow. /// /// # Example /// /// ~~~~ /// # extern crate chrono; fn main() { /// use chrono::{Duration, NaiveDate}; /// use chrono::naive::MIN_DATE; /// /// let d = NaiveDate::from_ymd(2015, 9, 5); /// assert_eq!(d.checked_sub_signed(Duration::days(40)), /// Some(NaiveDate::from_ymd(2015, 7, 27))); /// assert_eq!(d.checked_sub_signed(Duration::days(-40)), /// Some(NaiveDate::from_ymd(2015, 10, 15))); /// assert_eq!(d.checked_sub_signed(Duration::days(1_000_000_000)), None); /// assert_eq!(d.checked_sub_signed(Duration::days(-1_000_000_000)), None); /// assert_eq!(MIN_DATE.checked_sub_signed(Duration::days(1)), None); /// # } /// ~~~~ pub fn checked_sub_signed(self, rhs: OldDuration) -> Option { let year = self.year(); let (mut year_div_400, year_mod_400) = div_mod_floor(year, 400); let cycle = internals::yo_to_cycle(year_mod_400 as u32, self.of().ordinal()); let cycle = try_opt!((cycle as i32).checked_sub(try_opt!(rhs.num_days().to_i32()))); let (cycle_div_400y, cycle) = div_mod_floor(cycle, 146_097); year_div_400 += cycle_div_400y; let (year_mod_400, ordinal) = internals::cycle_to_yo(cycle as u32); let flags = YearFlags::from_year_mod_400(year_mod_400 as i32); NaiveDate::from_of(year_div_400 * 400 + year_mod_400 as i32, Of::new(ordinal, flags)) } /// Subtracts another `NaiveDate` from the current date. /// Returns a `Duration` of integral numbers. /// /// This does not overflow or underflow at all, /// as all possible output fits in the range of `Duration`. /// /// # Example /// /// ~~~~ /// # extern crate chrono; fn main() { /// use chrono::{Duration, NaiveDate}; /// /// let from_ymd = NaiveDate::from_ymd; /// let since = NaiveDate::signed_duration_since; /// /// assert_eq!(since(from_ymd(2014, 1, 1), from_ymd(2014, 1, 1)), Duration::zero()); /// assert_eq!(since(from_ymd(2014, 1, 1), from_ymd(2013, 12, 31)), Duration::days(1)); /// assert_eq!(since(from_ymd(2014, 1, 1), from_ymd(2014, 1, 2)), Duration::days(-1)); /// assert_eq!(since(from_ymd(2014, 1, 1), from_ymd(2013, 9, 23)), Duration::days(100)); /// assert_eq!(since(from_ymd(2014, 1, 1), from_ymd(2013, 1, 1)), Duration::days(365)); /// assert_eq!(since(from_ymd(2014, 1, 1), from_ymd(2010, 1, 1)), Duration::days(365*4 + 1)); /// assert_eq!(since(from_ymd(2014, 1, 1), from_ymd(1614, 1, 1)), Duration::days(365*400 + 97)); /// # } /// ~~~~ pub fn signed_duration_since(self, rhs: NaiveDate) -> OldDuration { let year1 = self.year(); let year2 = rhs.year(); let (year1_div_400, year1_mod_400) = div_mod_floor(year1, 400); let (year2_div_400, year2_mod_400) = div_mod_floor(year2, 400); let cycle1 = i64::from(internals::yo_to_cycle(year1_mod_400 as u32, self.of().ordinal())); let cycle2 = i64::from(internals::yo_to_cycle(year2_mod_400 as u32, rhs.of().ordinal())); OldDuration::days( (i64::from(year1_div_400) - i64::from(year2_div_400)) * 146_097 + (cycle1 - cycle2), ) } /// Formats the date with the specified formatting items. /// Otherwise it is the same as the ordinary `format` method. /// /// The `Iterator` of items should be `Clone`able, /// since the resulting `DelayedFormat` value may be formatted multiple times. /// /// # Example /// /// ~~~~ /// use chrono::NaiveDate; /// use chrono::format::strftime::StrftimeItems; /// /// let fmt = StrftimeItems::new("%Y-%m-%d"); /// let d = NaiveDate::from_ymd(2015, 9, 5); /// assert_eq!(d.format_with_items(fmt.clone()).to_string(), "2015-09-05"); /// assert_eq!(d.format("%Y-%m-%d").to_string(), "2015-09-05"); /// ~~~~ /// /// The resulting `DelayedFormat` can be formatted directly via the `Display` trait. /// /// ~~~~ /// # use chrono::NaiveDate; /// # use chrono::format::strftime::StrftimeItems; /// # let fmt = StrftimeItems::new("%Y-%m-%d").clone(); /// # let d = NaiveDate::from_ymd(2015, 9, 5); /// assert_eq!(format!("{}", d.format_with_items(fmt)), "2015-09-05"); /// ~~~~ #[cfg(any(feature = "alloc", feature = "std", test))] #[inline] pub fn format_with_items<'a, I, B>(&self, items: I) -> DelayedFormat where I: Iterator + Clone, B: Borrow>, { DelayedFormat::new(Some(*self), None, items) } /// Formats the date with the specified format string. /// See the [`format::strftime` module](../format/strftime/index.html) /// on the supported escape sequences. /// /// This returns a `DelayedFormat`, /// which gets converted to a string only when actual formatting happens. /// You may use the `to_string` method to get a `String`, /// or just feed it into `print!` and other formatting macros. /// (In this way it avoids the redundant memory allocation.) /// /// A wrong format string does *not* issue an error immediately. /// Rather, converting or formatting the `DelayedFormat` fails. /// You are recommended to immediately use `DelayedFormat` for this reason. /// /// # Example /// /// ~~~~ /// use chrono::NaiveDate; /// /// let d = NaiveDate::from_ymd(2015, 9, 5); /// assert_eq!(d.format("%Y-%m-%d").to_string(), "2015-09-05"); /// assert_eq!(d.format("%A, %-d %B, %C%y").to_string(), "Saturday, 5 September, 2015"); /// ~~~~ /// /// The resulting `DelayedFormat` can be formatted directly via the `Display` trait. /// /// ~~~~ /// # use chrono::NaiveDate; /// # let d = NaiveDate::from_ymd(2015, 9, 5); /// assert_eq!(format!("{}", d.format("%Y-%m-%d")), "2015-09-05"); /// assert_eq!(format!("{}", d.format("%A, %-d %B, %C%y")), "Saturday, 5 September, 2015"); /// ~~~~ #[cfg(any(feature = "alloc", feature = "std", test))] #[inline] pub fn format<'a>(&self, fmt: &'a str) -> DelayedFormat> { self.format_with_items(StrftimeItems::new(fmt)) } /// Returns an iterator that steps by days until the last representable date. /// /// # Example /// /// ``` /// # use chrono::NaiveDate; /// /// let expected = [ /// NaiveDate::from_ymd(2016, 2, 27), /// NaiveDate::from_ymd(2016, 2, 28), /// NaiveDate::from_ymd(2016, 2, 29), /// NaiveDate::from_ymd(2016, 3, 1), /// ]; /// /// let mut count = 0; /// for (idx, d) in NaiveDate::from_ymd(2016, 2, 27).iter_days().take(4).enumerate() { /// assert_eq!(d, expected[idx]); /// count += 1; /// } /// assert_eq!(count, 4); /// ``` #[inline] pub fn iter_days(&self) -> NaiveDateDaysIterator { NaiveDateDaysIterator { value: *self } } /// Returns an iterator that steps by weeks until the last representable date. /// /// # Example /// /// ``` /// # use chrono::NaiveDate; /// /// let expected = [ /// NaiveDate::from_ymd(2016, 2, 27), /// NaiveDate::from_ymd(2016, 3, 5), /// NaiveDate::from_ymd(2016, 3, 12), /// NaiveDate::from_ymd(2016, 3, 19), /// ]; /// /// let mut count = 0; /// for (idx, d) in NaiveDate::from_ymd(2016, 2, 27).iter_weeks().take(4).enumerate() { /// assert_eq!(d, expected[idx]); /// count += 1; /// } /// assert_eq!(count, 4); /// ``` #[inline] pub fn iter_weeks(&self) -> NaiveDateWeeksIterator { NaiveDateWeeksIterator { value: *self } } } impl Datelike for NaiveDate { /// Returns the year number in the [calendar date](#calendar-date). /// /// # Example /// /// ~~~~ /// use chrono::{NaiveDate, Datelike}; /// /// assert_eq!(NaiveDate::from_ymd(2015, 9, 8).year(), 2015); /// assert_eq!(NaiveDate::from_ymd(-308, 3, 14).year(), -308); // 309 BCE /// ~~~~ #[inline] fn year(&self) -> i32 { self.ymdf >> 13 } /// Returns the month number starting from 1. /// /// The return value ranges from 1 to 12. /// /// # Example /// /// ~~~~ /// use chrono::{NaiveDate, Datelike}; /// /// assert_eq!(NaiveDate::from_ymd(2015, 9, 8).month(), 9); /// assert_eq!(NaiveDate::from_ymd(-308, 3, 14).month(), 3); /// ~~~~ #[inline] fn month(&self) -> u32 { self.mdf().month() } /// Returns the month number starting from 0. /// /// The return value ranges from 0 to 11. /// /// # Example /// /// ~~~~ /// use chrono::{NaiveDate, Datelike}; /// /// assert_eq!(NaiveDate::from_ymd(2015, 9, 8).month0(), 8); /// assert_eq!(NaiveDate::from_ymd(-308, 3, 14).month0(), 2); /// ~~~~ #[inline] fn month0(&self) -> u32 { self.mdf().month() - 1 } /// Returns the day of month starting from 1. /// /// The return value ranges from 1 to 31. (The last day of month differs by months.) /// /// # Example /// /// ~~~~ /// use chrono::{NaiveDate, Datelike}; /// /// assert_eq!(NaiveDate::from_ymd(2015, 9, 8).day(), 8); /// assert_eq!(NaiveDate::from_ymd(-308, 3, 14).day(), 14); /// ~~~~ /// /// Combined with [`NaiveDate::pred`](#method.pred), /// one can determine the number of days in a particular month. /// (Note that this panics when `year` is out of range.) /// /// ~~~~ /// use chrono::{NaiveDate, Datelike}; /// /// fn ndays_in_month(year: i32, month: u32) -> u32 { /// // the first day of the next month... /// let (y, m) = if month == 12 { (year + 1, 1) } else { (year, month + 1) }; /// let d = NaiveDate::from_ymd(y, m, 1); /// /// // ...is preceded by the last day of the original month /// d.pred().day() /// } /// /// assert_eq!(ndays_in_month(2015, 8), 31); /// assert_eq!(ndays_in_month(2015, 9), 30); /// assert_eq!(ndays_in_month(2015, 12), 31); /// assert_eq!(ndays_in_month(2016, 2), 29); /// assert_eq!(ndays_in_month(2017, 2), 28); /// ~~~~ #[inline] fn day(&self) -> u32 { self.mdf().day() } /// Returns the day of month starting from 0. /// /// The return value ranges from 0 to 30. (The last day of month differs by months.) /// /// # Example /// /// ~~~~ /// use chrono::{NaiveDate, Datelike}; /// /// assert_eq!(NaiveDate::from_ymd(2015, 9, 8).day0(), 7); /// assert_eq!(NaiveDate::from_ymd(-308, 3, 14).day0(), 13); /// ~~~~ #[inline] fn day0(&self) -> u32 { self.mdf().day() - 1 } /// Returns the day of year starting from 1. /// /// The return value ranges from 1 to 366. (The last day of year differs by years.) /// /// # Example /// /// ~~~~ /// use chrono::{NaiveDate, Datelike}; /// /// assert_eq!(NaiveDate::from_ymd(2015, 9, 8).ordinal(), 251); /// assert_eq!(NaiveDate::from_ymd(-308, 3, 14).ordinal(), 74); /// ~~~~ /// /// Combined with [`NaiveDate::pred`](#method.pred), /// one can determine the number of days in a particular year. /// (Note that this panics when `year` is out of range.) /// /// ~~~~ /// use chrono::{NaiveDate, Datelike}; /// /// fn ndays_in_year(year: i32) -> u32 { /// // the first day of the next year... /// let d = NaiveDate::from_ymd(year + 1, 1, 1); /// /// // ...is preceded by the last day of the original year /// d.pred().ordinal() /// } /// /// assert_eq!(ndays_in_year(2015), 365); /// assert_eq!(ndays_in_year(2016), 366); /// assert_eq!(ndays_in_year(2017), 365); /// assert_eq!(ndays_in_year(2000), 366); /// assert_eq!(ndays_in_year(2100), 365); /// ~~~~ #[inline] fn ordinal(&self) -> u32 { self.of().ordinal() } /// Returns the day of year starting from 0. /// /// The return value ranges from 0 to 365. (The last day of year differs by years.) /// /// # Example /// /// ~~~~ /// use chrono::{NaiveDate, Datelike}; /// /// assert_eq!(NaiveDate::from_ymd(2015, 9, 8).ordinal0(), 250); /// assert_eq!(NaiveDate::from_ymd(-308, 3, 14).ordinal0(), 73); /// ~~~~ #[inline] fn ordinal0(&self) -> u32 { self.of().ordinal() - 1 } /// Returns the day of week. /// /// # Example /// /// ~~~~ /// use chrono::{NaiveDate, Datelike, Weekday}; /// /// assert_eq!(NaiveDate::from_ymd(2015, 9, 8).weekday(), Weekday::Tue); /// assert_eq!(NaiveDate::from_ymd(-308, 3, 14).weekday(), Weekday::Fri); /// ~~~~ #[inline] fn weekday(&self) -> Weekday { self.of().weekday() } #[inline] fn iso_week(&self) -> IsoWeek { isoweek::iso_week_from_yof(self.year(), self.of()) } /// Makes a new `NaiveDate` with the year number changed. /// /// Returns `None` when the resulting `NaiveDate` would be invalid. /// /// # Example /// /// ~~~~ /// use chrono::{NaiveDate, Datelike}; /// /// assert_eq!(NaiveDate::from_ymd(2015, 9, 8).with_year(2016), /// Some(NaiveDate::from_ymd(2016, 9, 8))); /// assert_eq!(NaiveDate::from_ymd(2015, 9, 8).with_year(-308), /// Some(NaiveDate::from_ymd(-308, 9, 8))); /// ~~~~ /// /// A leap day (February 29) is a good example that this method can return `None`. /// /// ~~~~ /// # use chrono::{NaiveDate, Datelike}; /// assert!(NaiveDate::from_ymd(2016, 2, 29).with_year(2015).is_none()); /// assert!(NaiveDate::from_ymd(2016, 2, 29).with_year(2020).is_some()); /// ~~~~ #[inline] fn with_year(&self, year: i32) -> Option { // we need to operate with `mdf` since we should keep the month and day number as is let mdf = self.mdf(); // adjust the flags as needed let flags = YearFlags::from_year(year); let mdf = mdf.with_flags(flags); NaiveDate::from_mdf(year, mdf) } /// Makes a new `NaiveDate` with the month number (starting from 1) changed. /// /// Returns `None` when the resulting `NaiveDate` would be invalid. /// /// # Example /// /// ~~~~ /// use chrono::{NaiveDate, Datelike}; /// /// assert_eq!(NaiveDate::from_ymd(2015, 9, 8).with_month(10), /// Some(NaiveDate::from_ymd(2015, 10, 8))); /// assert_eq!(NaiveDate::from_ymd(2015, 9, 8).with_month(13), None); // no month 13 /// assert_eq!(NaiveDate::from_ymd(2015, 9, 30).with_month(2), None); // no February 30 /// ~~~~ #[inline] fn with_month(&self, month: u32) -> Option { self.with_mdf(self.mdf().with_month(month)) } /// Makes a new `NaiveDate` with the month number (starting from 0) changed. /// /// Returns `None` when the resulting `NaiveDate` would be invalid. /// /// # Example /// /// ~~~~ /// use chrono::{NaiveDate, Datelike}; /// /// assert_eq!(NaiveDate::from_ymd(2015, 9, 8).with_month0(9), /// Some(NaiveDate::from_ymd(2015, 10, 8))); /// assert_eq!(NaiveDate::from_ymd(2015, 9, 8).with_month0(12), None); // no month 13 /// assert_eq!(NaiveDate::from_ymd(2015, 9, 30).with_month0(1), None); // no February 30 /// ~~~~ #[inline] fn with_month0(&self, month0: u32) -> Option { self.with_mdf(self.mdf().with_month(month0 + 1)) } /// Makes a new `NaiveDate` with the day of month (starting from 1) changed. /// /// Returns `None` when the resulting `NaiveDate` would be invalid. /// /// # Example /// /// ~~~~ /// use chrono::{NaiveDate, Datelike}; /// /// assert_eq!(NaiveDate::from_ymd(2015, 9, 8).with_day(30), /// Some(NaiveDate::from_ymd(2015, 9, 30))); /// assert_eq!(NaiveDate::from_ymd(2015, 9, 8).with_day(31), /// None); // no September 31 /// ~~~~ #[inline] fn with_day(&self, day: u32) -> Option { self.with_mdf(self.mdf().with_day(day)) } /// Makes a new `NaiveDate` with the day of month (starting from 0) changed. /// /// Returns `None` when the resulting `NaiveDate` would be invalid. /// /// # Example /// /// ~~~~ /// use chrono::{NaiveDate, Datelike}; /// /// assert_eq!(NaiveDate::from_ymd(2015, 9, 8).with_day0(29), /// Some(NaiveDate::from_ymd(2015, 9, 30))); /// assert_eq!(NaiveDate::from_ymd(2015, 9, 8).with_day0(30), /// None); // no September 31 /// ~~~~ #[inline] fn with_day0(&self, day0: u32) -> Option { self.with_mdf(self.mdf().with_day(day0 + 1)) } /// Makes a new `NaiveDate` with the day of year (starting from 1) changed. /// /// Returns `None` when the resulting `NaiveDate` would be invalid. /// /// # Example /// /// ~~~~ /// use chrono::{NaiveDate, Datelike}; /// /// assert_eq!(NaiveDate::from_ymd(2015, 1, 1).with_ordinal(60), /// Some(NaiveDate::from_ymd(2015, 3, 1))); /// assert_eq!(NaiveDate::from_ymd(2015, 1, 1).with_ordinal(366), /// None); // 2015 had only 365 days /// /// assert_eq!(NaiveDate::from_ymd(2016, 1, 1).with_ordinal(60), /// Some(NaiveDate::from_ymd(2016, 2, 29))); /// assert_eq!(NaiveDate::from_ymd(2016, 1, 1).with_ordinal(366), /// Some(NaiveDate::from_ymd(2016, 12, 31))); /// ~~~~ #[inline] fn with_ordinal(&self, ordinal: u32) -> Option { self.with_of(self.of().with_ordinal(ordinal)) } /// Makes a new `NaiveDate` with the day of year (starting from 0) changed. /// /// Returns `None` when the resulting `NaiveDate` would be invalid. /// /// # Example /// /// ~~~~ /// use chrono::{NaiveDate, Datelike}; /// /// assert_eq!(NaiveDate::from_ymd(2015, 1, 1).with_ordinal0(59), /// Some(NaiveDate::from_ymd(2015, 3, 1))); /// assert_eq!(NaiveDate::from_ymd(2015, 1, 1).with_ordinal0(365), /// None); // 2015 had only 365 days /// /// assert_eq!(NaiveDate::from_ymd(2016, 1, 1).with_ordinal0(59), /// Some(NaiveDate::from_ymd(2016, 2, 29))); /// assert_eq!(NaiveDate::from_ymd(2016, 1, 1).with_ordinal0(365), /// Some(NaiveDate::from_ymd(2016, 12, 31))); /// ~~~~ #[inline] fn with_ordinal0(&self, ordinal0: u32) -> Option { self.with_of(self.of().with_ordinal(ordinal0 + 1)) } } /// An addition of `Duration` to `NaiveDate` discards the fractional days, /// rounding to the closest integral number of days towards `Duration::zero()`. /// /// Panics on underflow or overflow. /// Use [`NaiveDate::checked_add_signed`](#method.checked_add_signed) to detect that. /// /// # Example /// /// ~~~~ /// # extern crate chrono; fn main() { /// use chrono::{Duration, NaiveDate}; /// /// let from_ymd = NaiveDate::from_ymd; /// /// assert_eq!(from_ymd(2014, 1, 1) + Duration::zero(), from_ymd(2014, 1, 1)); /// assert_eq!(from_ymd(2014, 1, 1) + Duration::seconds(86399), from_ymd(2014, 1, 1)); /// assert_eq!(from_ymd(2014, 1, 1) + Duration::seconds(-86399), from_ymd(2014, 1, 1)); /// assert_eq!(from_ymd(2014, 1, 1) + Duration::days(1), from_ymd(2014, 1, 2)); /// assert_eq!(from_ymd(2014, 1, 1) + Duration::days(-1), from_ymd(2013, 12, 31)); /// assert_eq!(from_ymd(2014, 1, 1) + Duration::days(364), from_ymd(2014, 12, 31)); /// assert_eq!(from_ymd(2014, 1, 1) + Duration::days(365*4 + 1), from_ymd(2018, 1, 1)); /// assert_eq!(from_ymd(2014, 1, 1) + Duration::days(365*400 + 97), from_ymd(2414, 1, 1)); /// # } /// ~~~~ impl Add for NaiveDate { type Output = NaiveDate; #[inline] fn add(self, rhs: OldDuration) -> NaiveDate { self.checked_add_signed(rhs).expect("`NaiveDate + Duration` overflowed") } } impl AddAssign for NaiveDate { #[inline] fn add_assign(&mut self, rhs: OldDuration) { *self = self.add(rhs); } } /// A subtraction of `Duration` from `NaiveDate` discards the fractional days, /// rounding to the closest integral number of days towards `Duration::zero()`. /// It is the same as the addition with a negated `Duration`. /// /// Panics on underflow or overflow. /// Use [`NaiveDate::checked_sub_signed`](#method.checked_sub_signed) to detect that. /// /// # Example /// /// ~~~~ /// # extern crate chrono; fn main() { /// use chrono::{Duration, NaiveDate}; /// /// let from_ymd = NaiveDate::from_ymd; /// /// assert_eq!(from_ymd(2014, 1, 1) - Duration::zero(), from_ymd(2014, 1, 1)); /// assert_eq!(from_ymd(2014, 1, 1) - Duration::seconds(86399), from_ymd(2014, 1, 1)); /// assert_eq!(from_ymd(2014, 1, 1) - Duration::seconds(-86399), from_ymd(2014, 1, 1)); /// assert_eq!(from_ymd(2014, 1, 1) - Duration::days(1), from_ymd(2013, 12, 31)); /// assert_eq!(from_ymd(2014, 1, 1) - Duration::days(-1), from_ymd(2014, 1, 2)); /// assert_eq!(from_ymd(2014, 1, 1) - Duration::days(364), from_ymd(2013, 1, 2)); /// assert_eq!(from_ymd(2014, 1, 1) - Duration::days(365*4 + 1), from_ymd(2010, 1, 1)); /// assert_eq!(from_ymd(2014, 1, 1) - Duration::days(365*400 + 97), from_ymd(1614, 1, 1)); /// # } /// ~~~~ impl Sub for NaiveDate { type Output = NaiveDate; #[inline] fn sub(self, rhs: OldDuration) -> NaiveDate { self.checked_sub_signed(rhs).expect("`NaiveDate - Duration` overflowed") } } impl SubAssign for NaiveDate { #[inline] fn sub_assign(&mut self, rhs: OldDuration) { *self = self.sub(rhs); } } /// Subtracts another `NaiveDate` from the current date. /// Returns a `Duration` of integral numbers. /// /// This does not overflow or underflow at all, /// as all possible output fits in the range of `Duration`. /// /// The implementation is a wrapper around /// [`NaiveDate::signed_duration_since`](#method.signed_duration_since). /// /// # Example /// /// ~~~~ /// # extern crate chrono; fn main() { /// use chrono::{Duration, NaiveDate}; /// /// let from_ymd = NaiveDate::from_ymd; /// /// assert_eq!(from_ymd(2014, 1, 1) - from_ymd(2014, 1, 1), Duration::zero()); /// assert_eq!(from_ymd(2014, 1, 1) - from_ymd(2013, 12, 31), Duration::days(1)); /// assert_eq!(from_ymd(2014, 1, 1) - from_ymd(2014, 1, 2), Duration::days(-1)); /// assert_eq!(from_ymd(2014, 1, 1) - from_ymd(2013, 9, 23), Duration::days(100)); /// assert_eq!(from_ymd(2014, 1, 1) - from_ymd(2013, 1, 1), Duration::days(365)); /// assert_eq!(from_ymd(2014, 1, 1) - from_ymd(2010, 1, 1), Duration::days(365*4 + 1)); /// assert_eq!(from_ymd(2014, 1, 1) - from_ymd(1614, 1, 1), Duration::days(365*400 + 97)); /// # } /// ~~~~ impl Sub for NaiveDate { type Output = OldDuration; #[inline] fn sub(self, rhs: NaiveDate) -> OldDuration { self.signed_duration_since(rhs) } } /// Iterator over `NaiveDate` with a step size of one day. #[derive(Debug, Copy, Clone, Hash, PartialEq, PartialOrd, Eq, Ord)] pub struct NaiveDateDaysIterator { value: NaiveDate, } impl Iterator for NaiveDateDaysIterator { type Item = NaiveDate; fn next(&mut self) -> Option { if self.value == MAX_DATE { return None; } // current < MAX_DATE from here on: let current = self.value; // This can't panic because current is < MAX_DATE: self.value = current.succ(); Some(current) } fn size_hint(&self) -> (usize, Option) { let exact_size = MAX_DATE.signed_duration_since(self.value).num_days(); (exact_size as usize, Some(exact_size as usize)) } } impl ExactSizeIterator for NaiveDateDaysIterator {} #[derive(Debug, Copy, Clone, Hash, PartialEq, PartialOrd, Eq, Ord)] pub struct NaiveDateWeeksIterator { value: NaiveDate, } impl Iterator for NaiveDateWeeksIterator { type Item = NaiveDate; fn next(&mut self) -> Option { if MAX_DATE - self.value < OldDuration::weeks(1) { return None; } let current = self.value; self.value = current + OldDuration::weeks(1); Some(current) } fn size_hint(&self) -> (usize, Option) { let exact_size = MAX_DATE.signed_duration_since(self.value).num_weeks(); (exact_size as usize, Some(exact_size as usize)) } } impl ExactSizeIterator for NaiveDateWeeksIterator {} // TODO: NaiveDateDaysIterator and NaiveDateWeeksIterator should implement FusedIterator, // TrustedLen, and Step once they becomes stable. // See: https://github.com/chronotope/chrono/issues/208 /// The `Debug` output of the naive date `d` is the same as /// [`d.format("%Y-%m-%d")`](../format/strftime/index.html). /// /// The string printed can be readily parsed via the `parse` method on `str`. /// /// # Example /// /// ~~~~ /// use chrono::NaiveDate; /// /// assert_eq!(format!("{:?}", NaiveDate::from_ymd(2015, 9, 5)), "2015-09-05"); /// assert_eq!(format!("{:?}", NaiveDate::from_ymd( 0, 1, 1)), "0000-01-01"); /// assert_eq!(format!("{:?}", NaiveDate::from_ymd(9999, 12, 31)), "9999-12-31"); /// ~~~~ /// /// ISO 8601 requires an explicit sign for years before 1 BCE or after 9999 CE. /// /// ~~~~ /// # use chrono::NaiveDate; /// assert_eq!(format!("{:?}", NaiveDate::from_ymd( -1, 1, 1)), "-0001-01-01"); /// assert_eq!(format!("{:?}", NaiveDate::from_ymd(10000, 12, 31)), "+10000-12-31"); /// ~~~~ impl fmt::Debug for NaiveDate { fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { let year = self.year(); let mdf = self.mdf(); if 0 <= year && year <= 9999 { write!(f, "{:04}-{:02}-{:02}", year, mdf.month(), mdf.day()) } else { // ISO 8601 requires the explicit sign for out-of-range years write!(f, "{:+05}-{:02}-{:02}", year, mdf.month(), mdf.day()) } } } /// The `Display` output of the naive date `d` is the same as /// [`d.format("%Y-%m-%d")`](../format/strftime/index.html). /// /// The string printed can be readily parsed via the `parse` method on `str`. /// /// # Example /// /// ~~~~ /// use chrono::NaiveDate; /// /// assert_eq!(format!("{}", NaiveDate::from_ymd(2015, 9, 5)), "2015-09-05"); /// assert_eq!(format!("{}", NaiveDate::from_ymd( 0, 1, 1)), "0000-01-01"); /// assert_eq!(format!("{}", NaiveDate::from_ymd(9999, 12, 31)), "9999-12-31"); /// ~~~~ /// /// ISO 8601 requires an explicit sign for years before 1 BCE or after 9999 CE. /// /// ~~~~ /// # use chrono::NaiveDate; /// assert_eq!(format!("{}", NaiveDate::from_ymd( -1, 1, 1)), "-0001-01-01"); /// assert_eq!(format!("{}", NaiveDate::from_ymd(10000, 12, 31)), "+10000-12-31"); /// ~~~~ impl fmt::Display for NaiveDate { fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { fmt::Debug::fmt(self, f) } } /// Parsing a `str` into a `NaiveDate` uses the same format, /// [`%Y-%m-%d`](../format/strftime/index.html), as in `Debug` and `Display`. /// /// # Example /// /// ~~~~ /// use chrono::NaiveDate; /// /// let d = NaiveDate::from_ymd(2015, 9, 18); /// assert_eq!("2015-09-18".parse::(), Ok(d)); /// /// let d = NaiveDate::from_ymd(12345, 6, 7); /// assert_eq!("+12345-6-7".parse::(), Ok(d)); /// /// assert!("foo".parse::().is_err()); /// ~~~~ impl str::FromStr for NaiveDate { type Err = ParseError; fn from_str(s: &str) -> ParseResult { const ITEMS: &'static [Item<'static>] = &[ Item::Numeric(Numeric::Year, Pad::Zero), Item::Space(""), Item::Literal("-"), Item::Numeric(Numeric::Month, Pad::Zero), Item::Space(""), Item::Literal("-"), Item::Numeric(Numeric::Day, Pad::Zero), Item::Space(""), ]; let mut parsed = Parsed::new(); parse(&mut parsed, s, ITEMS.iter())?; parsed.to_naive_date() } } #[cfg(all(test, any(feature = "rustc-serialize", feature = "serde")))] fn test_encodable_json(to_string: F) where F: Fn(&NaiveDate) -> Result, E: ::std::fmt::Debug, { assert_eq!(to_string(&NaiveDate::from_ymd(2014, 7, 24)).ok(), Some(r#""2014-07-24""#.into())); assert_eq!(to_string(&NaiveDate::from_ymd(0, 1, 1)).ok(), Some(r#""0000-01-01""#.into())); assert_eq!(to_string(&NaiveDate::from_ymd(-1, 12, 31)).ok(), Some(r#""-0001-12-31""#.into())); assert_eq!(to_string(&MIN_DATE).ok(), Some(r#""-262144-01-01""#.into())); assert_eq!(to_string(&MAX_DATE).ok(), Some(r#""+262143-12-31""#.into())); } #[cfg(all(test, any(feature = "rustc-serialize", feature = "serde")))] fn test_decodable_json(from_str: F) where F: Fn(&str) -> Result, E: ::std::fmt::Debug, { use std::{i32, i64}; assert_eq!(from_str(r#""2016-07-08""#).ok(), Some(NaiveDate::from_ymd(2016, 7, 8))); assert_eq!(from_str(r#""2016-7-8""#).ok(), Some(NaiveDate::from_ymd(2016, 7, 8))); assert_eq!(from_str(r#""+002016-07-08""#).ok(), Some(NaiveDate::from_ymd(2016, 7, 8))); assert_eq!(from_str(r#""0000-01-01""#).ok(), Some(NaiveDate::from_ymd(0, 1, 1))); assert_eq!(from_str(r#""0-1-1""#).ok(), Some(NaiveDate::from_ymd(0, 1, 1))); assert_eq!(from_str(r#""-0001-12-31""#).ok(), Some(NaiveDate::from_ymd(-1, 12, 31))); assert_eq!(from_str(r#""-262144-01-01""#).ok(), Some(MIN_DATE)); assert_eq!(from_str(r#""+262143-12-31""#).ok(), Some(MAX_DATE)); // bad formats assert!(from_str(r#""""#).is_err()); assert!(from_str(r#""20001231""#).is_err()); assert!(from_str(r#""2000-00-00""#).is_err()); assert!(from_str(r#""2000-02-30""#).is_err()); assert!(from_str(r#""2001-02-29""#).is_err()); assert!(from_str(r#""2002-002-28""#).is_err()); assert!(from_str(r#""yyyy-mm-dd""#).is_err()); assert!(from_str(r#"0"#).is_err()); assert!(from_str(r#"20.01"#).is_err()); assert!(from_str(&i32::MIN.to_string()).is_err()); assert!(from_str(&i32::MAX.to_string()).is_err()); assert!(from_str(&i64::MIN.to_string()).is_err()); assert!(from_str(&i64::MAX.to_string()).is_err()); assert!(from_str(r#"{}"#).is_err()); // pre-0.3.0 rustc-serialize format is now invalid assert!(from_str(r#"{"ymdf":20}"#).is_err()); assert!(from_str(r#"null"#).is_err()); } #[cfg(feature = "rustc-serialize")] mod rustc_serialize { use super::NaiveDate; use rustc_serialize::{Decodable, Decoder, Encodable, Encoder}; impl Encodable for NaiveDate { fn encode(&self, s: &mut S) -> Result<(), S::Error> { format!("{:?}", self).encode(s) } } impl Decodable for NaiveDate { fn decode(d: &mut D) -> Result { d.read_str()?.parse().map_err(|_| d.error("invalid date")) } } #[cfg(test)] use rustc_serialize::json; #[test] fn test_encodable() { super::test_encodable_json(json::encode); } #[test] fn test_decodable() { super::test_decodable_json(json::decode); } } #[cfg(feature = "serde")] mod serde { use super::NaiveDate; use core::fmt; use serdelib::{de, ser}; // TODO not very optimized for space (binary formats would want something better) impl ser::Serialize for NaiveDate { fn serialize(&self, serializer: S) -> Result where S: ser::Serializer, { struct FormatWrapped<'a, D: 'a> { inner: &'a D, } impl<'a, D: fmt::Debug> fmt::Display for FormatWrapped<'a, D> { fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { self.inner.fmt(f) } } serializer.collect_str(&FormatWrapped { inner: &self }) } } struct NaiveDateVisitor; impl<'de> de::Visitor<'de> for NaiveDateVisitor { type Value = NaiveDate; fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { write!(formatter, "a formatted date string") } #[cfg(any(feature = "std", test))] fn visit_str(self, value: &str) -> Result where E: de::Error, { value.parse().map_err(E::custom) } #[cfg(not(any(feature = "std", test)))] fn visit_str(self, value: &str) -> Result where E: de::Error, { value.parse().map_err(E::custom) } } impl<'de> de::Deserialize<'de> for NaiveDate { fn deserialize(deserializer: D) -> Result where D: de::Deserializer<'de>, { deserializer.deserialize_str(NaiveDateVisitor) } } #[cfg(test)] extern crate bincode; #[cfg(test)] extern crate serde_json; #[test] fn test_serde_serialize() { super::test_encodable_json(self::serde_json::to_string); } #[test] fn test_serde_deserialize() { super::test_decodable_json(|input| self::serde_json::from_str(&input)); } #[test] fn test_serde_bincode() { // Bincode is relevant to test separately from JSON because // it is not self-describing. use self::bincode::{deserialize, serialize, Infinite}; let d = NaiveDate::from_ymd(2014, 7, 24); let encoded = serialize(&d, Infinite).unwrap(); let decoded: NaiveDate = deserialize(&encoded).unwrap(); assert_eq!(d, decoded); } } #[cfg(test)] mod tests { use super::NaiveDate; use super::{MAX_DATE, MAX_DAYS_FROM_YEAR_0, MAX_YEAR}; use super::{MIN_DATE, MIN_DAYS_FROM_YEAR_0, MIN_YEAR}; use oldtime::Duration; use std::{i32, u32}; use {Datelike, Weekday}; #[test] fn test_date_from_ymd() { let ymd_opt = |y, m, d| NaiveDate::from_ymd_opt(y, m, d); assert!(ymd_opt(2012, 0, 1).is_none()); assert!(ymd_opt(2012, 1, 1).is_some()); assert!(ymd_opt(2012, 2, 29).is_some()); assert!(ymd_opt(2014, 2, 29).is_none()); assert!(ymd_opt(2014, 3, 0).is_none()); assert!(ymd_opt(2014, 3, 1).is_some()); assert!(ymd_opt(2014, 3, 31).is_some()); assert!(ymd_opt(2014, 3, 32).is_none()); assert!(ymd_opt(2014, 12, 31).is_some()); assert!(ymd_opt(2014, 13, 1).is_none()); } #[test] fn test_date_from_yo() { let yo_opt = |y, o| NaiveDate::from_yo_opt(y, o); let ymd = |y, m, d| NaiveDate::from_ymd(y, m, d); assert_eq!(yo_opt(2012, 0), None); assert_eq!(yo_opt(2012, 1), Some(ymd(2012, 1, 1))); assert_eq!(yo_opt(2012, 2), Some(ymd(2012, 1, 2))); assert_eq!(yo_opt(2012, 32), Some(ymd(2012, 2, 1))); assert_eq!(yo_opt(2012, 60), Some(ymd(2012, 2, 29))); assert_eq!(yo_opt(2012, 61), Some(ymd(2012, 3, 1))); assert_eq!(yo_opt(2012, 100), Some(ymd(2012, 4, 9))); assert_eq!(yo_opt(2012, 200), Some(ymd(2012, 7, 18))); assert_eq!(yo_opt(2012, 300), Some(ymd(2012, 10, 26))); assert_eq!(yo_opt(2012, 366), Some(ymd(2012, 12, 31))); assert_eq!(yo_opt(2012, 367), None); assert_eq!(yo_opt(2014, 0), None); assert_eq!(yo_opt(2014, 1), Some(ymd(2014, 1, 1))); assert_eq!(yo_opt(2014, 2), Some(ymd(2014, 1, 2))); assert_eq!(yo_opt(2014, 32), Some(ymd(2014, 2, 1))); assert_eq!(yo_opt(2014, 59), Some(ymd(2014, 2, 28))); assert_eq!(yo_opt(2014, 60), Some(ymd(2014, 3, 1))); assert_eq!(yo_opt(2014, 100), Some(ymd(2014, 4, 10))); assert_eq!(yo_opt(2014, 200), Some(ymd(2014, 7, 19))); assert_eq!(yo_opt(2014, 300), Some(ymd(2014, 10, 27))); assert_eq!(yo_opt(2014, 365), Some(ymd(2014, 12, 31))); assert_eq!(yo_opt(2014, 366), None); } #[test] fn test_date_from_isoywd() { let isoywd_opt = |y, w, d| NaiveDate::from_isoywd_opt(y, w, d); let ymd = |y, m, d| NaiveDate::from_ymd(y, m, d); assert_eq!(isoywd_opt(2004, 0, Weekday::Sun), None); assert_eq!(isoywd_opt(2004, 1, Weekday::Mon), Some(ymd(2003, 12, 29))); assert_eq!(isoywd_opt(2004, 1, Weekday::Sun), Some(ymd(2004, 1, 4))); assert_eq!(isoywd_opt(2004, 2, Weekday::Mon), Some(ymd(2004, 1, 5))); assert_eq!(isoywd_opt(2004, 2, Weekday::Sun), Some(ymd(2004, 1, 11))); assert_eq!(isoywd_opt(2004, 52, Weekday::Mon), Some(ymd(2004, 12, 20))); assert_eq!(isoywd_opt(2004, 52, Weekday::Sun), Some(ymd(2004, 12, 26))); assert_eq!(isoywd_opt(2004, 53, Weekday::Mon), Some(ymd(2004, 12, 27))); assert_eq!(isoywd_opt(2004, 53, Weekday::Sun), Some(ymd(2005, 1, 2))); assert_eq!(isoywd_opt(2004, 54, Weekday::Mon), None); assert_eq!(isoywd_opt(2011, 0, Weekday::Sun), None); assert_eq!(isoywd_opt(2011, 1, Weekday::Mon), Some(ymd(2011, 1, 3))); assert_eq!(isoywd_opt(2011, 1, Weekday::Sun), Some(ymd(2011, 1, 9))); assert_eq!(isoywd_opt(2011, 2, Weekday::Mon), Some(ymd(2011, 1, 10))); assert_eq!(isoywd_opt(2011, 2, Weekday::Sun), Some(ymd(2011, 1, 16))); assert_eq!(isoywd_opt(2018, 51, Weekday::Mon), Some(ymd(2018, 12, 17))); assert_eq!(isoywd_opt(2018, 51, Weekday::Sun), Some(ymd(2018, 12, 23))); assert_eq!(isoywd_opt(2018, 52, Weekday::Mon), Some(ymd(2018, 12, 24))); assert_eq!(isoywd_opt(2018, 52, Weekday::Sun), Some(ymd(2018, 12, 30))); assert_eq!(isoywd_opt(2018, 53, Weekday::Mon), None); } #[test] fn test_date_from_isoywd_and_iso_week() { for year in 2000..2401 { for week in 1..54 { for &weekday in [ Weekday::Mon, Weekday::Tue, Weekday::Wed, Weekday::Thu, Weekday::Fri, Weekday::Sat, Weekday::Sun, ] .iter() { let d = NaiveDate::from_isoywd_opt(year, week, weekday); if d.is_some() { let d = d.unwrap(); assert_eq!(d.weekday(), weekday); let w = d.iso_week(); assert_eq!(w.year(), year); assert_eq!(w.week(), week); } } } } for year in 2000..2401 { for month in 1..13 { for day in 1..32 { let d = NaiveDate::from_ymd_opt(year, month, day); if d.is_some() { let d = d.unwrap(); let w = d.iso_week(); let d_ = NaiveDate::from_isoywd(w.year(), w.week(), d.weekday()); assert_eq!(d, d_); } } } } } #[test] fn test_date_from_num_days_from_ce() { let from_ndays_from_ce = |days| NaiveDate::from_num_days_from_ce_opt(days); assert_eq!(from_ndays_from_ce(1), Some(NaiveDate::from_ymd(1, 1, 1))); assert_eq!(from_ndays_from_ce(2), Some(NaiveDate::from_ymd(1, 1, 2))); assert_eq!(from_ndays_from_ce(31), Some(NaiveDate::from_ymd(1, 1, 31))); assert_eq!(from_ndays_from_ce(32), Some(NaiveDate::from_ymd(1, 2, 1))); assert_eq!(from_ndays_from_ce(59), Some(NaiveDate::from_ymd(1, 2, 28))); assert_eq!(from_ndays_from_ce(60), Some(NaiveDate::from_ymd(1, 3, 1))); assert_eq!(from_ndays_from_ce(365), Some(NaiveDate::from_ymd(1, 12, 31))); assert_eq!(from_ndays_from_ce(365 * 1 + 1), Some(NaiveDate::from_ymd(2, 1, 1))); assert_eq!(from_ndays_from_ce(365 * 2 + 1), Some(NaiveDate::from_ymd(3, 1, 1))); assert_eq!(from_ndays_from_ce(365 * 3 + 1), Some(NaiveDate::from_ymd(4, 1, 1))); assert_eq!(from_ndays_from_ce(365 * 4 + 2), Some(NaiveDate::from_ymd(5, 1, 1))); assert_eq!(from_ndays_from_ce(146097 + 1), Some(NaiveDate::from_ymd(401, 1, 1))); assert_eq!(from_ndays_from_ce(146097 * 5 + 1), Some(NaiveDate::from_ymd(2001, 1, 1))); assert_eq!(from_ndays_from_ce(719163), Some(NaiveDate::from_ymd(1970, 1, 1))); assert_eq!(from_ndays_from_ce(0), Some(NaiveDate::from_ymd(0, 12, 31))); // 1 BCE assert_eq!(from_ndays_from_ce(-365), Some(NaiveDate::from_ymd(0, 1, 1))); assert_eq!(from_ndays_from_ce(-366), Some(NaiveDate::from_ymd(-1, 12, 31))); // 2 BCE for days in (-9999..10001).map(|x| x * 100) { assert_eq!(from_ndays_from_ce(days).map(|d| d.num_days_from_ce()), Some(days)); } assert_eq!(from_ndays_from_ce(MIN_DATE.num_days_from_ce()), Some(MIN_DATE)); assert_eq!(from_ndays_from_ce(MIN_DATE.num_days_from_ce() - 1), None); assert_eq!(from_ndays_from_ce(MAX_DATE.num_days_from_ce()), Some(MAX_DATE)); assert_eq!(from_ndays_from_ce(MAX_DATE.num_days_from_ce() + 1), None); } #[test] fn test_date_from_weekday_of_month_opt() { let ymwd = |y, m, w, n| NaiveDate::from_weekday_of_month_opt(y, m, w, n); assert_eq!(ymwd(2018, 8, Weekday::Tue, 0), None); assert_eq!(ymwd(2018, 8, Weekday::Wed, 1), Some(NaiveDate::from_ymd(2018, 8, 1))); assert_eq!(ymwd(2018, 8, Weekday::Thu, 1), Some(NaiveDate::from_ymd(2018, 8, 2))); assert_eq!(ymwd(2018, 8, Weekday::Sun, 1), Some(NaiveDate::from_ymd(2018, 8, 5))); assert_eq!(ymwd(2018, 8, Weekday::Mon, 1), Some(NaiveDate::from_ymd(2018, 8, 6))); assert_eq!(ymwd(2018, 8, Weekday::Tue, 1), Some(NaiveDate::from_ymd(2018, 8, 7))); assert_eq!(ymwd(2018, 8, Weekday::Wed, 2), Some(NaiveDate::from_ymd(2018, 8, 8))); assert_eq!(ymwd(2018, 8, Weekday::Sun, 2), Some(NaiveDate::from_ymd(2018, 8, 12))); assert_eq!(ymwd(2018, 8, Weekday::Thu, 3), Some(NaiveDate::from_ymd(2018, 8, 16))); assert_eq!(ymwd(2018, 8, Weekday::Thu, 4), Some(NaiveDate::from_ymd(2018, 8, 23))); assert_eq!(ymwd(2018, 8, Weekday::Thu, 5), Some(NaiveDate::from_ymd(2018, 8, 30))); assert_eq!(ymwd(2018, 8, Weekday::Fri, 5), Some(NaiveDate::from_ymd(2018, 8, 31))); assert_eq!(ymwd(2018, 8, Weekday::Sat, 5), None); } #[test] fn test_date_fields() { fn check(year: i32, month: u32, day: u32, ordinal: u32) { let d1 = NaiveDate::from_ymd(year, month, day); assert_eq!(d1.year(), year); assert_eq!(d1.month(), month); assert_eq!(d1.day(), day); assert_eq!(d1.ordinal(), ordinal); let d2 = NaiveDate::from_yo(year, ordinal); assert_eq!(d2.year(), year); assert_eq!(d2.month(), month); assert_eq!(d2.day(), day); assert_eq!(d2.ordinal(), ordinal); assert_eq!(d1, d2); } check(2012, 1, 1, 1); check(2012, 1, 2, 2); check(2012, 2, 1, 32); check(2012, 2, 29, 60); check(2012, 3, 1, 61); check(2012, 4, 9, 100); check(2012, 7, 18, 200); check(2012, 10, 26, 300); check(2012, 12, 31, 366); check(2014, 1, 1, 1); check(2014, 1, 2, 2); check(2014, 2, 1, 32); check(2014, 2, 28, 59); check(2014, 3, 1, 60); check(2014, 4, 10, 100); check(2014, 7, 19, 200); check(2014, 10, 27, 300); check(2014, 12, 31, 365); } #[test] fn test_date_weekday() { assert_eq!(NaiveDate::from_ymd(1582, 10, 15).weekday(), Weekday::Fri); // May 20, 1875 = ISO 8601 reference date assert_eq!(NaiveDate::from_ymd(1875, 5, 20).weekday(), Weekday::Thu); assert_eq!(NaiveDate::from_ymd(2000, 1, 1).weekday(), Weekday::Sat); } #[test] fn test_date_with_fields() { let d = NaiveDate::from_ymd(2000, 2, 29); assert_eq!(d.with_year(-400), Some(NaiveDate::from_ymd(-400, 2, 29))); assert_eq!(d.with_year(-100), None); assert_eq!(d.with_year(1600), Some(NaiveDate::from_ymd(1600, 2, 29))); assert_eq!(d.with_year(1900), None); assert_eq!(d.with_year(2000), Some(NaiveDate::from_ymd(2000, 2, 29))); assert_eq!(d.with_year(2001), None); assert_eq!(d.with_year(2004), Some(NaiveDate::from_ymd(2004, 2, 29))); assert_eq!(d.with_year(i32::MAX), None); let d = NaiveDate::from_ymd(2000, 4, 30); assert_eq!(d.with_month(0), None); assert_eq!(d.with_month(1), Some(NaiveDate::from_ymd(2000, 1, 30))); assert_eq!(d.with_month(2), None); assert_eq!(d.with_month(3), Some(NaiveDate::from_ymd(2000, 3, 30))); assert_eq!(d.with_month(4), Some(NaiveDate::from_ymd(2000, 4, 30))); assert_eq!(d.with_month(12), Some(NaiveDate::from_ymd(2000, 12, 30))); assert_eq!(d.with_month(13), None); assert_eq!(d.with_month(u32::MAX), None); let d = NaiveDate::from_ymd(2000, 2, 8); assert_eq!(d.with_day(0), None); assert_eq!(d.with_day(1), Some(NaiveDate::from_ymd(2000, 2, 1))); assert_eq!(d.with_day(29), Some(NaiveDate::from_ymd(2000, 2, 29))); assert_eq!(d.with_day(30), None); assert_eq!(d.with_day(u32::MAX), None); let d = NaiveDate::from_ymd(2000, 5, 5); assert_eq!(d.with_ordinal(0), None); assert_eq!(d.with_ordinal(1), Some(NaiveDate::from_ymd(2000, 1, 1))); assert_eq!(d.with_ordinal(60), Some(NaiveDate::from_ymd(2000, 2, 29))); assert_eq!(d.with_ordinal(61), Some(NaiveDate::from_ymd(2000, 3, 1))); assert_eq!(d.with_ordinal(366), Some(NaiveDate::from_ymd(2000, 12, 31))); assert_eq!(d.with_ordinal(367), None); assert_eq!(d.with_ordinal(u32::MAX), None); } #[test] fn test_date_num_days_from_ce() { assert_eq!(NaiveDate::from_ymd(1, 1, 1).num_days_from_ce(), 1); for year in -9999..10001 { assert_eq!( NaiveDate::from_ymd(year, 1, 1).num_days_from_ce(), NaiveDate::from_ymd(year - 1, 12, 31).num_days_from_ce() + 1 ); } } #[test] fn test_date_succ() { let ymd = |y, m, d| NaiveDate::from_ymd(y, m, d); assert_eq!(ymd(2014, 5, 6).succ_opt(), Some(ymd(2014, 5, 7))); assert_eq!(ymd(2014, 5, 31).succ_opt(), Some(ymd(2014, 6, 1))); assert_eq!(ymd(2014, 12, 31).succ_opt(), Some(ymd(2015, 1, 1))); assert_eq!(ymd(2016, 2, 28).succ_opt(), Some(ymd(2016, 2, 29))); assert_eq!(ymd(MAX_DATE.year(), 12, 31).succ_opt(), None); } #[test] fn test_date_pred() { let ymd = |y, m, d| NaiveDate::from_ymd(y, m, d); assert_eq!(ymd(2016, 3, 1).pred_opt(), Some(ymd(2016, 2, 29))); assert_eq!(ymd(2015, 1, 1).pred_opt(), Some(ymd(2014, 12, 31))); assert_eq!(ymd(2014, 6, 1).pred_opt(), Some(ymd(2014, 5, 31))); assert_eq!(ymd(2014, 5, 7).pred_opt(), Some(ymd(2014, 5, 6))); assert_eq!(ymd(MIN_DATE.year(), 1, 1).pred_opt(), None); } #[test] fn test_date_add() { fn check((y1, m1, d1): (i32, u32, u32), rhs: Duration, ymd: Option<(i32, u32, u32)>) { let lhs = NaiveDate::from_ymd(y1, m1, d1); let sum = ymd.map(|(y, m, d)| NaiveDate::from_ymd(y, m, d)); assert_eq!(lhs.checked_add_signed(rhs), sum); assert_eq!(lhs.checked_sub_signed(-rhs), sum); } check((2014, 1, 1), Duration::zero(), Some((2014, 1, 1))); check((2014, 1, 1), Duration::seconds(86399), Some((2014, 1, 1))); // always round towards zero check((2014, 1, 1), Duration::seconds(-86399), Some((2014, 1, 1))); check((2014, 1, 1), Duration::days(1), Some((2014, 1, 2))); check((2014, 1, 1), Duration::days(-1), Some((2013, 12, 31))); check((2014, 1, 1), Duration::days(364), Some((2014, 12, 31))); check((2014, 1, 1), Duration::days(365 * 4 + 1), Some((2018, 1, 1))); check((2014, 1, 1), Duration::days(365 * 400 + 97), Some((2414, 1, 1))); check((-7, 1, 1), Duration::days(365 * 12 + 3), Some((5, 1, 1))); // overflow check check((0, 1, 1), Duration::days(MAX_DAYS_FROM_YEAR_0 as i64), Some((MAX_YEAR, 12, 31))); check((0, 1, 1), Duration::days(MAX_DAYS_FROM_YEAR_0 as i64 + 1), None); check((0, 1, 1), Duration::max_value(), None); check((0, 1, 1), Duration::days(MIN_DAYS_FROM_YEAR_0 as i64), Some((MIN_YEAR, 1, 1))); check((0, 1, 1), Duration::days(MIN_DAYS_FROM_YEAR_0 as i64 - 1), None); check((0, 1, 1), Duration::min_value(), None); } #[test] fn test_date_sub() { fn check((y1, m1, d1): (i32, u32, u32), (y2, m2, d2): (i32, u32, u32), diff: Duration) { let lhs = NaiveDate::from_ymd(y1, m1, d1); let rhs = NaiveDate::from_ymd(y2, m2, d2); assert_eq!(lhs.signed_duration_since(rhs), diff); assert_eq!(rhs.signed_duration_since(lhs), -diff); } check((2014, 1, 1), (2014, 1, 1), Duration::zero()); check((2014, 1, 2), (2014, 1, 1), Duration::days(1)); check((2014, 12, 31), (2014, 1, 1), Duration::days(364)); check((2015, 1, 3), (2014, 1, 1), Duration::days(365 + 2)); check((2018, 1, 1), (2014, 1, 1), Duration::days(365 * 4 + 1)); check((2414, 1, 1), (2014, 1, 1), Duration::days(365 * 400 + 97)); check((MAX_YEAR, 12, 31), (0, 1, 1), Duration::days(MAX_DAYS_FROM_YEAR_0 as i64)); check((MIN_YEAR, 1, 1), (0, 1, 1), Duration::days(MIN_DAYS_FROM_YEAR_0 as i64)); } #[test] fn test_date_addassignment() { let ymd = NaiveDate::from_ymd; let mut date = ymd(2016, 10, 1); date += Duration::days(10); assert_eq!(date, ymd(2016, 10, 11)); date += Duration::days(30); assert_eq!(date, ymd(2016, 11, 10)); } #[test] fn test_date_subassignment() { let ymd = NaiveDate::from_ymd; let mut date = ymd(2016, 10, 11); date -= Duration::days(10); assert_eq!(date, ymd(2016, 10, 1)); date -= Duration::days(2); assert_eq!(date, ymd(2016, 9, 29)); } #[test] fn test_date_fmt() { assert_eq!(format!("{:?}", NaiveDate::from_ymd(2012, 3, 4)), "2012-03-04"); assert_eq!(format!("{:?}", NaiveDate::from_ymd(0, 3, 4)), "0000-03-04"); assert_eq!(format!("{:?}", NaiveDate::from_ymd(-307, 3, 4)), "-0307-03-04"); assert_eq!(format!("{:?}", NaiveDate::from_ymd(12345, 3, 4)), "+12345-03-04"); assert_eq!(NaiveDate::from_ymd(2012, 3, 4).to_string(), "2012-03-04"); assert_eq!(NaiveDate::from_ymd(0, 3, 4).to_string(), "0000-03-04"); assert_eq!(NaiveDate::from_ymd(-307, 3, 4).to_string(), "-0307-03-04"); assert_eq!(NaiveDate::from_ymd(12345, 3, 4).to_string(), "+12345-03-04"); // the format specifier should have no effect on `NaiveTime` assert_eq!(format!("{:+30?}", NaiveDate::from_ymd(1234, 5, 6)), "1234-05-06"); assert_eq!(format!("{:30?}", NaiveDate::from_ymd(12345, 6, 7)), "+12345-06-07"); } #[test] fn test_date_from_str() { // valid cases let valid = [ "-0000000123456-1-2", " -123456 - 1 - 2 ", "-12345-1-2", "-1234-12-31", "-7-6-5", "350-2-28", "360-02-29", "0360-02-29", "2015-2 -18", "+70-2-18", "+70000-2-18", "+00007-2-18", ]; for &s in &valid { let d = match s.parse::() { Ok(d) => d, Err(e) => panic!("parsing `{}` has failed: {}", s, e), }; let s_ = format!("{:?}", d); // `s` and `s_` may differ, but `s.parse()` and `s_.parse()` must be same let d_ = match s_.parse::() { Ok(d) => d, Err(e) => { panic!("`{}` is parsed into `{:?}`, but reparsing that has failed: {}", s, d, e) } }; assert!( d == d_, "`{}` is parsed into `{:?}`, but reparsed result \ `{:?}` does not match", s, d, d_ ); } // some invalid cases // since `ParseErrorKind` is private, all we can do is to check if there was an error assert!("".parse::().is_err()); assert!("x".parse::().is_err()); assert!("2014".parse::().is_err()); assert!("2014-01".parse::().is_err()); assert!("2014-01-00".parse::().is_err()); assert!("2014-13-57".parse::().is_err()); assert!("9999999-9-9".parse::().is_err()); // out-of-bounds } #[test] fn test_date_parse_from_str() { let ymd = |y, m, d| NaiveDate::from_ymd(y, m, d); assert_eq!( NaiveDate::parse_from_str("2014-5-7T12:34:56+09:30", "%Y-%m-%dT%H:%M:%S%z"), Ok(ymd(2014, 5, 7)) ); // ignore time and offset assert_eq!( NaiveDate::parse_from_str("2015-W06-1=2015-033", "%G-W%V-%u = %Y-%j"), Ok(ymd(2015, 2, 2)) ); assert_eq!( NaiveDate::parse_from_str("Fri, 09 Aug 13", "%a, %d %b %y"), Ok(ymd(2013, 8, 9)) ); assert!(NaiveDate::parse_from_str("Sat, 09 Aug 2013", "%a, %d %b %Y").is_err()); assert!(NaiveDate::parse_from_str("2014-57", "%Y-%m-%d").is_err()); assert!(NaiveDate::parse_from_str("2014", "%Y").is_err()); // insufficient } #[test] fn test_date_format() { let d = NaiveDate::from_ymd(2012, 3, 4); assert_eq!(d.format("%Y,%C,%y,%G,%g").to_string(), "2012,20,12,2012,12"); assert_eq!(d.format("%m,%b,%h,%B").to_string(), "03,Mar,Mar,March"); assert_eq!(d.format("%d,%e").to_string(), "04, 4"); assert_eq!(d.format("%U,%W,%V").to_string(), "10,09,09"); assert_eq!(d.format("%a,%A,%w,%u").to_string(), "Sun,Sunday,0,7"); assert_eq!(d.format("%j").to_string(), "064"); // since 2012 is a leap year assert_eq!(d.format("%D,%x").to_string(), "03/04/12,03/04/12"); assert_eq!(d.format("%F").to_string(), "2012-03-04"); assert_eq!(d.format("%v").to_string(), " 4-Mar-2012"); assert_eq!(d.format("%t%n%%%n%t").to_string(), "\t\n%\n\t"); // non-four-digit years assert_eq!(NaiveDate::from_ymd(12345, 1, 1).format("%Y").to_string(), "+12345"); assert_eq!(NaiveDate::from_ymd(1234, 1, 1).format("%Y").to_string(), "1234"); assert_eq!(NaiveDate::from_ymd(123, 1, 1).format("%Y").to_string(), "0123"); assert_eq!(NaiveDate::from_ymd(12, 1, 1).format("%Y").to_string(), "0012"); assert_eq!(NaiveDate::from_ymd(1, 1, 1).format("%Y").to_string(), "0001"); assert_eq!(NaiveDate::from_ymd(0, 1, 1).format("%Y").to_string(), "0000"); assert_eq!(NaiveDate::from_ymd(-1, 1, 1).format("%Y").to_string(), "-0001"); assert_eq!(NaiveDate::from_ymd(-12, 1, 1).format("%Y").to_string(), "-0012"); assert_eq!(NaiveDate::from_ymd(-123, 1, 1).format("%Y").to_string(), "-0123"); assert_eq!(NaiveDate::from_ymd(-1234, 1, 1).format("%Y").to_string(), "-1234"); assert_eq!(NaiveDate::from_ymd(-12345, 1, 1).format("%Y").to_string(), "-12345"); // corner cases assert_eq!( NaiveDate::from_ymd(2007, 12, 31).format("%G,%g,%U,%W,%V").to_string(), "2008,08,53,53,01" ); assert_eq!( NaiveDate::from_ymd(2010, 1, 3).format("%G,%g,%U,%W,%V").to_string(), "2009,09,01,00,53" ); } #[test] fn test_day_iterator_limit() { assert_eq!( NaiveDate::from_ymd(262143, 12, 29).iter_days().take(4).collect::>().len(), 2 ); } #[test] fn test_week_iterator_limit() { assert_eq!( NaiveDate::from_ymd(262143, 12, 12).iter_weeks().take(4).collect::>().len(), 2 ); } }