On 12/9/07, Ryan Bloor <[EMAIL PROTECTED]> wrote: > > hi > > I have a function parseInt... which needs an error guard for when the input > is not an Int. > > parseInt :: Parser > parseInt [] = [] > parseInt xs = let (digits, rest) = span isDigit (removeSpace xs) > in [(EInt (read digits), removeSpace rest)] > > Also... I have a function that does this... parseBinaryOp "+" "(5 + 2) if" > gives...[(Int 5, Int 2, "if")] > so, op is '+' or "&&". I am unsure of how to begin... > > parseBinaryOp :: String -> String -> [(Expr, Expr, String)] > parseBinaryOp op str >
Check out: http://www.haskell.org/haskellwiki/Homework_help If this isn't homework, try posting again and phrasing your question in the form of a question; saying "I am unsure of how to begin" doesn't help us help you think about the problem. Cheers, Tim -- Tim Chevalier * catamorphism.org * Often in error, never in doubt "[Teaching children to read] will make America what we want it to be, a literate country and a hopefuller country." -- George W. Bush _______________________________________________ Haskell-Cafe mailing list [email protected] http://www.haskell.org/mailman/listinfo/haskell-cafe
