darcs-2.2.1: a distributed, interactive, smart revision control system Source code Contents Index

DateMatcher

Synopsis

parseDateMatcher :: String -> IO (CalendarTime -> Bool) data DateMatcher = forall d . Show d => DM String (Either ParseError d) (d -> CalendarTime -> Bool) getMatchers :: String -> IO [DateMatcher]

Documentation

parseDateMatcher :: String -> IO (CalendarTime -> Bool) Source

parseDateMatcher s return the first matcher in getMatchers that can parse s

data DateMatcher Source

A DateMatcher combines a potential parse for a date string with a matcher function that operates on a given date. We use an existential type on the matcher to allow the date string to either be interpreted as a point in time or as an interval. Constructors forall d . Show d => DM String (Either ParseError d) (d -> CalendarTime -> Bool)

getMatchers :: String -> IO [DateMatcher] Source

getMatchers d returns the list of matchers that will be applied on d. If you wish to extend the date parsing code, this will likely be the function that you modify to do so.

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