Re: [Haskell-cafe] Parser question

15 Mar 2005


      On Tue, 15 Mar 2005, Nicola Whitehead wrote:
...
Hi folks,
I have a parser problem. I have a basic calculator program (Graham Hutton's from Nottingham) which contains the following code:
-- Define a parser to handle the input
expr :: Parser Int
expr = do t <- term
             do symbol "+"
                  e <- expr
                  return (t + e)
         +++ return t
I assume that the nested 'do' (before 'symbol') is too much.

Re: [Haskell-cafe] Parser question

Henning Thielemann