Quelle date.rs
Sprache: unbekannt
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// 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 extrapolatio n.
/// 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<NaiveDate> {
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> {
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<NaiveDate> {
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<NaiveDate> {
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<NaiveDate> {
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<NaiveDate> {
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<NaiveDate> {
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<NaiveDate> {
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<NaiveDateTime> {
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<NaiveDateTime> {
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<NaiveDateTime> {
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<NaiveDateTime> {
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<NaiveDate> {
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<NaiveDate> {
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<NaiveDate> {
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<NaiveDate> {
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<NaiveDate> {
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<NaiveDate> {
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<I>
where
I: Iterator<Item = B> + Clone,
B: Borrow<Item<'a>>,
{
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<StrftimeItems<'a>> {
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<NaiveDate> {
// 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<NaiveDate> {
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<NaiveDate> {
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<NaiveDate> {
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<NaiveDate> {
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<NaiveDate> {
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<NaiveDate> {
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<OldDuration> for NaiveDate {
type Output = NaiveDate;
#[inline]
fn add(self, rhs: OldDuration) -> NaiveDate {
self.checked_add_signed(rhs).expect("`NaiveDate + Duration` overflowed")
}
}
impl AddAssign<OldDuration> 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<OldDuration> for NaiveDate {
type Output = NaiveDate;
#[inline]
fn sub(self, rhs: OldDuration) -> NaiveDate {
self.checked_sub_signed(rhs).expect("`NaiveDate - Duration` overflowed")
}
}
impl SubAssign<OldDuration> 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<NaiveDate> 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<Self::Item> {
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<usize>) {
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<Self::Item> {
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<usize>) {
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::<NaiveDate>(), Ok(d));
///
/// let d = NaiveDate::from_ymd(12345, 6, 7);
/// assert_eq!("+12345-6-7".parse::<NaiveDate>(), Ok(d));
///
/// assert!("foo".parse::<NaiveDate>().is_err());
/// ~~~~
impl str::FromStr for NaiveDate {
type Err = ParseError;
fn from_str(s: &str) -> ParseResult<NaiveDate> {
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<F, E>(to_string: F)
where
F: Fn(&NaiveDate) -> Result<String, E>,
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<F, E>(from_str: F)
where
F: Fn(&str) -> Result<NaiveDate, E>,
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)));
--> --------------------
--> maximum size reached
--> --------------------
[ Dauer der Verarbeitung: 0.51 Sekunden
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2026-04-02
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