[Haskell-beginners] A "show" error

[Adrien Haxaire]

Oh sorry I just realized you did !



On Sun, Mar 11, 2012 at 07:10:28PM +0000, bahadýr altan wrote:
> Hi, 
> I'm trying to process on a tree with this function :
> 
> f (Branch x (Branch y y1 y2) (Branch z z1 z2)) = (x,y,y1,y2,z,z1,z2)
> 
> 
> and my tree declaration is this : 
> 
> data Tree = Empty | Branch Integer Tree Tree deriving (Show)
> 
> And I'm getting this error : 
> 
> Main> f (Branch 12 (Branch 15 Empty Empty) (Branch 28 Empty Empty))
> 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)
> 
> I'll be happy if you help me to get rid of this error..

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-- 
Adrien Haxaire 
www.adrienhaxaire.org | @adrienhaxaire