Struct CalendarDate 

pub struct CalendarDate {
    pub year: i32,
    pub month: u8,
    pub day: u8,
}

A calendar date, comparable by (year, month, day).

The derived Ord compares fields in declaration order, which for these three fields is chronological order.

Fields

year: i32

month: u8

day: u8

Implementations

impl CalendarDate

pub const fn new(year: i32, month: u8, day: u8) -> Self

Construct a date from year, month and day.

pub const fn is_plausible(&self) -> bool

Whether the month is 1–12 and the day 1–31.

A coarse well-formedness check, not a calendar validation: it accepts 31 February. Use it to reject transposed or garbage input at an ingestion boundary, not to prove a date exists.

pub fn parse_iso(s: &str) -> Option<Self>

Parse a strict YYYY-MM-DD date.

Returns None for anything else — wrong length, wrong separators, non-digits, or components failing Self::is_plausible. Deliberately strict and deliberately not lenient about partial dates: a compliance determination keyed on a date must never run against one the declarer did not actually state.

Trait Implementations

impl Clone for CalendarDate

fn clone(&self) -> CalendarDate

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for CalendarDate

impl Debug for CalendarDate

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for CalendarDate

impl Ord for CalendarDate

fn cmp(&self, other: &CalendarDate) -> Ordering

This method returns an Ordering between self and other.

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

where Self: Sized,

Compares and returns the maximum of two values.

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

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for CalendarDate

fn eq(&self, other: &CalendarDate) -> bool

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for CalendarDate

fn partial_cmp(&self, other: &CalendarDate) -> Option<Ordering>

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

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

Tests less than (for self and other) and is used by the < operator.

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

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

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

Tests greater than (for self and other) and is used by the > operator.

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

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

impl StructuralPartialEq for CalendarDate