On Fri, Sep 10, 2010 at 2:00 PM, S. Doaitse Swierstra
I show how this can be done using uu-parsinglib. Note that we have sevral parsers, each having its own type:
Thanks for such a complete example, Doaitse! Unfortunately I have a requirement I didn't disclose: the simple tags like <TRNUID>, <NAME>, <AMOUNT> could come in any order; and some are optional. I tried to fix that by making every field in my Transaction record a Maybe, and keeping a Transaction as state for my parser. But after so many Maybes I began to think this was not the right way. And I had to run a parser as part of another parser. And after all that, it wouldn't build because it was badly typed. But in any case, thanks for turning me on to Text.ParserCombinators.UU; I'd only tried Parsec before.