Struct BusinessDayGrid 

pub(crate) struct BusinessDayGrid {
    start: NaiveDate,
    days: u32,
    business: Vec<u64>,
    prefix: Vec<u32>,
}

Day-number-indexed business-day classification over a fixed date horizon: a bitset (one bit per day, set ⇔ business day) plus a per-word prefix sum making “business days in [0, i)” a lookup-and-popcount. Immutable after construction; ~4.6 KB of bits plus ~2.3 KB of prefix per century calendar.

Fields

start: NaiveDate

days: u32

Number of days covered, starting at start.

business: Vec<u64>

Bit i (word i / 64, bit i % 64) set ⇔ day i is a business day.

prefix: Vec<u32>

prefix[w] = number of business days in words [0, w).

Implementations

impl BusinessDayGrid

pub(crate) fn build( start: NaiveDate, days: u32, is_business: impl FnMut(NaiveDate) -> bool, ) -> Self

Builds the grid for [start, start + days) from a per-day classifier.

pub(crate) fn start(&self) -> NaiveDate

The grid’s first covered day.

pub(crate) fn end_exclusive(&self) -> NaiveDate

The first day after the covered horizon.

pub(crate) fn day_index(&self, date: NaiveDate) -> Option<u32>

The day index of date, or None outside the horizon.

pub(crate) fn is_business(&self, idx: u32) -> bool

Whether day idx (in range) is a business day.

pub(crate) fn rank(&self, idx: u32) -> i64

Number of business days among days [0, idx); idx may equal days.

pub(crate) fn count_in_horizon(&self, from: NaiveDate, to: NaiveDate) -> i64

Number of business days in the half-open date range [from, to) intersected with the horizon (from <= to).

Trait Implementations

impl Clone for BusinessDayGrid

fn clone(&self) -> BusinessDayGrid

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for BusinessDayGrid

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

Formats the value using the given formatter.