after parsing a string i am evaluating it...
string if t1 then t2 else t3
my code is
eval1 :: Term ->  Maybe Term                  
eval1(If Tru t2 t3) = Just t2
eval1(If Fls t2 t3) = Just t3
eval1(If t1 t2 t3) =  case eval t1
                    where eval1(If t1 t2 t3) =  Just t1         
         
eval :: Term -> Term
eval (IsZero Zero) = Tru
eval (Zero) = Zero
eval(Pred Zero) = Pred Zero

On Mon, Oct 17, 2011 at 3:46 PM, Ivan Lazar Miljenovic <ivan.miljenovic@gmail.com> wrote:
On 18 October 2011 08:43, kolli kolli <nammukolli04@gmail.com> wrote:
> hey can anyone tell me what is parser error in parser??Plz help me out

It's when the parser can't parse what it's provided.... providing the
code that caused the problem and the actual error message is required
for a more detailed explanation.

--
Ivan Lazar Miljenovic
Ivan.Miljenovic@gmail.com
IvanMiljenovic.wordpress.com