[Haskell-cafe] Re: Parse error

Maciej Piechotka uzytkownik2 at gmail.com
Sun Jan 17 09:13:14 EST 2010


On Sun, 2010-01-17 at 18:10 +0800, VoidPrayer wrote:
> let ...
> in ...
> 
> I guess GHC is finding where "in" is.

Except that:

main = do l <- getLine
          let l' = lines l
          print l'

Is perfectly valid without in. Similary:

something = proc (x, y) -> do x' <- someArrow -< x
                              let z = x + y + x'
                              returnA -< z

Regards




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