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.)
Makes a new value with the year number changed.
Returns None when the resulting value would be invalid.
fn with_month(&self, month: u32) -> Option<Self>
fn with_month(&self, month: u32) -> Option<Self>
Makes a new value with the month number (starting from 1) changed.
Returns None when the resulting value would be invalid.
fn with_month0(&self, month0: u32) -> Option<Self>
fn with_month0(&self, month0: u32) -> Option<Self>
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.
fn with_ordinal(&self, ordinal: u32) -> Option<Self>
fn with_ordinal(&self, ordinal: u32) -> Option<Self>
Makes a new value with the day of year (starting from 1) changed.
Returns None when the resulting value would be invalid.
fn with_ordinal0(&self, ordinal0: u32) -> Option<Self>
fn with_ordinal0(&self, ordinal0: u32) -> Option<Self>
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).
fn num_days_from_ce(&self) -> i32
fn num_days_from_ce(&self) -> i32
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);