Elegant Haskell case/error handling

Question

I\'m trying to better understand how to handle error cases in haskell and made wrote some code to help me with that.

Is there a better way (more elegant, sho

Answer 1

I think the most readable way is the maybe function you already tried, just a little bit prettified by avoiding lambdas (pointfree style) and using maybe even for the innermost check (by replacing if with mfilter):

import Control.Monad(mfilter)

process2 :: MyType -> String
process2 =  
  maybe "error"  $ 
  maybe "error2" $ 
  maybe "error3" 
  show . mfilter (<10) . Just