[Haskell-beginners] Parsing Revisited

Tillmann Rendel rendel at daimi.au.dk
Mon Nov 10 00:10:32 EST 2008

Jeffrey Drake wrote:
> This helps a lot, and I can go over this in the morning. The only final
> question I have is what you would use to apply all this to an arbitrary
> string.

You can use parseTest for testing, e.g. in ghci.

   parseTest texList "hello\world {example}"

That will either print the resulting {TeX], or a parser error message.

For normal processing, use parse.

   case parse texList "<no source>" "hello\world {example}" of
     Left problem -> error (show problem)
     Right texList -> convertToHTML texList


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