On Sun, Mar 11, 2012 at 15:10, bahadýr altan <doaltan@yahoo.co.uk> wrote:

ERROR - Cannot find "show" function for:

*** Expression : f (Branch 12 (Branch 15 Empty Empty) (Branch 28 Empty Empty))
*** Of type : (Integer,Integer,Tree,Tree,Integer,Tree,Tree)

Hugs apparently doesn't have a Show instance for 7-tuples.

Note that Hugs is quite old and not very well supported at this point; you should probably be using ghc / ghci instead.

--
brandon s allbery allbery.b@gmail.com
wandering unix systems administrator (available) (412) 475-9364 vm/sms