Re: [Haskell-beginners] Operator orders affect parse result

On Mon, Apr 13, 2015 at 03:49:43PM +0800, m00nlight wrote:

Hi Francesco,

Thanks for your reply. But after I change the aOperators like the following, it still produce non-correct parse result.

aOperators = [ [Prefix (reservedOp "-" >> return (Neg ))] , [ Infix (reservedOp "*" >> return (ABinary Divide )) AssocLeft, Infix (reservedOp "/" >> return (ABinary Multiply )) AssocLeft] , [Infix (reservedOp "+" >> return (ABinary Add )) AssocLeft, Infix (reservedOp "-" >> return (ABinary Subtract )) AssocLeft] ]

Check those lines: , [ Infix (reservedOp "*" >> return (ABinary Divide )) AssocLeft, Infix (reservedOp "/" >> return (ABinary Multiply )) AssocLeft] Divide should go on the same line of "/", not "*"! Similar fix for Multiply!