Trait chrono::Datelike[][src]

pub trait Datelike: Sized {
Show 18 methods fn year(&self) -> i32;
fn month(&self) -> u32;
fn month0(&self) -> u32;
fn day(&self) -> u32;
fn day0(&self) -> u32;
fn ordinal(&self) -> u32;
fn ordinal0(&self) -> u32;
fn weekday(&self) -> Weekday;
fn iso_week(&self) -> IsoWeek;
fn with_year(&self, year: i32) -> Option<Self>;
fn with_month(&self, month: u32) -> Option<Self>;
fn with_month0(&self, month0: u32) -> Option<Self>;
fn with_day(&self, day: u32) -> Option<Self>;
fn with_day0(&self, day0: u32) -> Option<Self>;
fn with_ordinal(&self, ordinal: u32) -> Option<Self>;
fn with_ordinal0(&self, ordinal0: u32) -> Option<Self>; fn year_ce(&self) -> (bool, u32) { ... }
fn num_days_from_ce(&self) -> i32 { ... }
}
Expand description

The common set of methods for date component.

Required methods

Returns the year number in the calendar date.

Returns the month number starting from 1.

The return value ranges from 1 to 12.

Returns the month number starting from 0.

The return value ranges from 0 to 11.

Returns the day of month starting from 1.

The return value ranges from 1 to 31. (The last day of month differs by months.)

Returns the day of month starting from 0.

The return value ranges from 0 to 30. (The last day of month differs by months.)

Returns the day of year starting from 1.

The return value ranges from 1 to 366. (The last day of year differs by years.)

Returns the day of year starting from 0.

The return value ranges from 0 to 365. (The last day of year differs by years.)

Returns the day of week.

Returns the ISO week.

Makes a new value with the year number changed.

Returns None when the resulting value would be invalid.

Makes a new value with the month number (starting from 1) changed.

Returns None when the resulting value would be invalid.

Makes a new value with the month number (starting from 0) changed.

Returns None when the resulting value would be invalid.

Makes a new value with the day of month (starting from 1) changed.

Returns None when the resulting value would be invalid.

Makes a new value with the day of month (starting from 0) changed.

Returns None when the resulting value would be invalid.

Makes a new value with the day of year (starting from 1) changed.

Returns None when the resulting value would be invalid.

Makes a new value with the day of year (starting from 0) changed.

Returns None when the resulting value would be invalid.

Provided methods

Returns the absolute year number starting from 1 with a boolean flag, which is false when the year predates the epoch (BCE/BC) and true otherwise (CE/AD).

Counts the days in the proleptic Gregorian calendar, with January 1, Year 1 (CE) as day 1.

Examples

use chrono::{NaiveDate, Datelike};

assert_eq!(NaiveDate::from_ymd(1970, 1, 1).num_days_from_ce(), 719_163);
assert_eq!(NaiveDate::from_ymd(2, 1, 1).num_days_from_ce(), 366);
assert_eq!(NaiveDate::from_ymd(1, 1, 1).num_days_from_ce(), 1);
assert_eq!(NaiveDate::from_ymd(0, 1, 1).num_days_from_ce(), -365);

Implementors