[Haskell-cafe] a way to convert partial functions to functions with Maybe's

13 Apr 2010

      Cafe,

Is there a way (without going into the IO lands) to achieve this:

data T = A | B | C

func1 :: T -> T
func1 A = B

func1Fixed :: T -> Maybe T
func1Fixed A = Just B
func1Fixed _ = Nothing

I want a function to generate func1Fixed, given func1.

I guess this is doable with exception handling (catching the error from
func1)? Is it the only way?

Best,

-- 
Ozgur Akgun