[clean-list] Parsing: to drill or not to drill, that is the question
metaperl
metaperl at gmail.com
Thu Aug 28 16:30:31 MEST 2008
surfaceWind is a parser engineered to operate on [Char]
however constantWind is a parser engineered to operate on Char... but it
then gets applied via drill to create a parser which operates on [Char]
Why would one be indirect and create a parser to operate on Char and then
apply 'drill' to get what you intended to use:
surfaceWind :: Parser [Char] SurfaceWind t
surfaceWind = "Surface Wind" :> p
where p = (word constantWind) <&> \surfaceWind -> <!?> (word
directionVariation)
(\dir2->{surfaceWind & direction=dir2}) // if found
surfaceWind // if nothing found
constantWind :: Parser Char SurfaceWind a
constantWind = direction <&> \dir ->
speed <&> \(u,spd) ->
gust u <@ \g -> {direction=dir,speed=spd,gust=g}
--
View this message in context: http://www.nabble.com/Parsing%3A-to-drill-or-not-to-drill%2C--that-is-the-question-tp19201847p19201847.html
Sent from the Clean mailing list archive at Nabble.com.
More information about the clean-list
mailing list