darcs-2.8.4: a distributed, interactive, smart revision control system

Portability | portable
Stability | experimental
Maintainer | darcs-devel@darcs.net
Safe Haskell | None

DateMatcher

Description

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)

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

data DateMatcher

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]

`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.