Safe Haskell	None
Language	Haskell98

Data.Dates

Description

Operations with dates

Synopsis

Documentation

data DateTime Source

Date / Time

Constructors

DateTime
Fields year :: Int month :: Int day :: Int hour :: Int minute :: Int second :: Int

Instances

Eq DateTime Source
Data DateTime Source
Ord DateTime Source
Show DateTime Source
Monoid DateTime Source

data Time Source

Only time, without date

Constructors

Time
Fields tHour :: Int tMinute :: Int tSecond :: Int

Instances

Eq Time Source
Data Time Source
Ord Time Source
Show Time Source

data WeekDay Source

Constructors

Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday

Instances

Bounded WeekDay Source
Enum WeekDay Source
Eq WeekDay Source
Data WeekDay Source
Ord WeekDay Source
Read WeekDay Source
Show WeekDay Source

parseDate Source

Arguments

:: DateTime	Current date / time, to use as base for relative dates
-> String	String to parse
-> Either ParseError DateTime

Parse date/time

pDate Source

Arguments

:: Stream s m Char
=> DateTime	Current date / time, to use as base for relative dates
-> ParsecT s st m DateTime

Parsec parser for Date only.

pDateTime Source

Arguments

:: Stream s m Char
=> DateTime	Current date / time, to use as base for relative dates
-> ParsecT s st m DateTime

Parsec parser for DateTime.

pTime :: Stream s m Char => ParsecT s st m Time Source

pDateInterval :: Stream s m Char => ParsecT s st m DateInterval Source

getCurrentDateTime :: IO DateTime Source

Get current date and time.

tryRead :: (Read a, Stream s m Char) => String -> ParsecT s st m a Source

Parser version of Prelude.read

tryReadInt :: (Stream s m Char, Num a) => String -> ParsecT s st m a Source

data DateIntervalType Source

Constructors

Day
Week
Month
Year

Instances

Eq DateIntervalType Source
Data DateIntervalType Source
Read DateIntervalType Source
Show DateIntervalType Source

data DateInterval Source

Constructors

Days ℤ
Weeks ℤ
Months ℤ
Years ℤ

Instances

Eq DateInterval Source
Data DateInterval Source
Show DateInterval Source

dayToDateTime :: Day -> DateTime Source

Convert date from Day to DateTime

dateTimeToDay :: DateTime -> Day Source

Convert date from DateTime to Day

weekdayToInterval :: WeekDay -> DateInterval Source

Weekday as interval from Monday, so that weekdayToInterval Monday == 0 and weekdayToInterval Sunday == 6.

weekdayNumber :: WeekDay -> Int Source

Number of weekday, with Monday == 1 and Sunday == 7.

intToWeekday :: Int -> WeekDay Source

Reverse for weekdayNumber

dateWeekDay :: DateTime -> WeekDay Source

Get weekday of given date.

lastMonday :: DateTime -> DateTime Source

nextMonday :: DateTime -> DateTime Source

modifyDate :: (t -> Day -> Day) -> t -> DateTime -> DateTime Source

Modify DateTime with pure function on Day

datesDifference :: DateTime -> DateTime -> Integer Source

Number of days between two dates

addInterval :: DateTime -> DateInterval -> DateTime Source

Add date interval to DateTime

negateInterval :: DateInterval -> DateInterval Source

Negate DateInterval value: Days 3 → Days (-3).

minusInterval :: DateTime -> DateInterval -> DateTime Source

Subtract DateInterval from DateTime.

addTime :: DateTime -> Time -> DateTime Source