Safe Haskell	None

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
Data DateTime
Ord DateTime
Show DateTime
Typeable DateTime
Monoid DateTime

data Time Source

Only time, without date

Constructors

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

Instances

Eq Time
Data Time
Ord Time
Show Time
Typeable Time

data WeekDay Source

Constructors

Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday

Instances

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

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

:: DateTime	Current date / time, to use as base for relative dates
-> Parsec String st DateTime

Parsec parser for Date only.

pDateTime Source

Arguments

:: DateTime	Current date / time, to use as base for relative dates
-> Parsec String st DateTime

Parsec parser for DateTime.

pTime :: Parsec String st Time Source

pDateInterval :: Parsec String st DateInterval Source

getCurrentDateTime :: IO DateTime Source

Get current date and time.

tryRead :: Read a => String -> Parsec String st aSource

Parser version of Prelude.read

data DateIntervalType Source

Constructors

Day
Week
Month
Year

Instances

Eq DateIntervalType
Data DateIntervalType
Read DateIntervalType
Show DateIntervalType
Typeable DateIntervalType

data DateInterval Source

Constructors

Days ℤ
Weeks ℤ
Months ℤ
Years ℤ

Instances

Eq DateInterval
Data DateInterval
Show DateInterval
Typeable DateInterval

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