Tks for the answer,
the data structure of Either is:
data Either a b = Left a | Right b deriving (Eq, Ord, Read, Show)
one example of what i want convert is:
Left(Right(Left(Left())))
No dia 22 de Outubro de 2010 04:58, Dan Piponi
<dpiponi@gmail.com> escreveu:
André Batista Martins asked:
> i want convert "Either" to a tree.
> Example:
> Either ( Either 1 2 ) ( Either 3 4) ---- >
> Branch ( Branch (Leafl 1) (Leafr2) ) ( Branch (Leafl 3) (Leafr4)) )
Before writing the function to convert your data structure, why not
try writing down the precise type signature you expect it to have.
In fact, before that, try writing down the precise type signature of
the thing you call an "Either".
--
Dan