Enum datetime::Month

pub enum Month {
    January,
    February,
    March,
    April,
    May,
    June,
    July,
    August,
    September,
    October,
    November,
    December,
}

A month of the year, starting with January, and ending with December.

This is stored as an enum instead of just a number to prevent off-by-one errors: is month 2 February (1-indexed) or March (0-indexed)? In this case, it’s 1-indexed, to have January become 1 when you use as i32 in code.

Variants

JanuaryFebruaryMarchAprilMayJuneJulyAugustSeptemberOctoberNovemberDecember

Methods

impl Month

fn days_in_month(&self, leap_year: bool) -> i8

Returns the number of days in this month, depending on whether it’s a leap year or not.

fn months_from_january(&self) -> usize

fn from_one(month: i8) -> Result<Month, Error>

Returns the month based on a number, with January as Month 1, February as Month 2, and so on.

use datetime::Month;
assert_eq!(Month::from_one(5), Ok(Month::May));
assert!(Month::from_one(0).is_err());

fn from_zero(month: i8) -> Result<Month, Error>

Returns the month based on a number, with January as Month 0, February as Month 1, and so on.

use datetime::Month;
assert_eq!(Month::from_zero(5), Ok(Month::June));
assert!(Month::from_zero(12).is_err());

Trait Implementations

impl PartialEq for Month

fn eq(&self, __arg_0: &Month) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=.

impl Eq for Month

impl PartialOrd for Month

fn partial_cmp(&self, __arg_0: &Month) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl Ord for Month

fn cmp(&self, __arg_0: &Month) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

Compares and returns the minimum of two values.

impl Debug for Month

fn fmt(&self, __arg_0: &mut Formatter) -> Result

Formats the value using the given formatter.

impl Clone for Month

fn clone(&self) -> Month

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for Month