#date #calendar

bdays

Business Days calendars for Rustaceans

1 unstable release

0.0.1 Nov 26, 2018

#95 in Date and time

Download history 9/week @ 2018-11-27

3 downloads per month

MIT license

46KB
660 lines

bdays

Business Days calendars for Rustaceans.


lib.rs:

Provides functions to perform business days calculation between dates, given a Holiday Calendar.

A Business Day is defined as a weekday that is not a holiday. To check if a date is a holiday, you must provide an implementation of the HolidayCalendar trait.

This crate is a port of BusinessDays.jl to the Rust programming language.

Provided Holiday Calendars

This crate provides a set of built in holiday calendars in the bdays::calendars submodule.

  • bdays::calendars::WeekendsOnly : accounts only weekends
  • bdays::calendars::brazil::BRSettlement : Brazilian banking holidays

Usage

extern crate bdays;
extern crate chrono;
use chrono::NaiveDate;
use bdays::HolidayCalendar;

// creates a holiday calendar instance
let cal = bdays::calendars::WeekendsOnly;

let d0 = NaiveDate::from_ymd(2018, 11, 22);
let d1 = NaiveDate::from_ymd(2018, 11, 24);
let d2 = NaiveDate::from_ymd(2018, 11, 26);

// checks if a date is a holiday
assert_eq!( cal.is_holiday(d0), false );

// checks if a date is a business day
assert_eq!( cal.is_bday(d0), true);
assert_eq!( cal.is_bday(d1), false);

// adjusts to the last/next businessdays
assert_eq!(cal.to_bday(d1, false), NaiveDate::from_ymd(2018, 11, 23));
assert_eq!(cal.to_bday(d1, true), d2);

// advances a number of business days
assert_eq!(cal.advance_bdays(d0, 2), d2);
assert_eq!(cal.advance_bdays(d2, -2), d0);

// returns the number of business days between dates
assert_eq!( cal.bdays(d0, d2), 2);

HolidayCalendarCache

As a motivation, this example might take some time to finish.

extern crate bdays;
extern crate chrono;
use chrono::NaiveDate;
use bdays::HolidayCalendar;

let cal = bdays::calendars::brazil::BRSettlement;
let d0 = NaiveDate::from_ymd(2001, 2, 1);
let d1 = NaiveDate::from_ymd(2100, 2, 1);

for _i in 0..30 {
    cal.bdays(d0, d1);
}

You can use HolidayCalendarCache to perform fast business days calculation for a given range of dates.

extern crate bdays;
extern crate chrono;
use chrono::NaiveDate;
use bdays::HolidayCalendar;

let cal = bdays::HolidayCalendarCache::new(bdays::calendars::brazil::BRSettlement, NaiveDate::from_ymd(1980, 1, 1), NaiveDate::from_ymd(2100, 12, 31));
let d0 = NaiveDate::from_ymd(2001, 2, 1);
let d1 = NaiveDate::from_ymd(2100, 2, 1);

for _i in 0..30 {
    cal.bdays(d0, d1);
}

Dependencies

~739KB