[Haskell-cafe] parsebinaryoperations

[Philip Weaver]

Maybe you should look into Parsec, a Haskell library for writing parsers.
Google should find what you need.

- Phil

On Dec 9, 2007 1:58 AM, Ryan Bloor <ryanbloor at hotmail.com> 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
>
> Thankyou
>
> Ryan
>
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