[Haskell-cafe] Parsing of bytestrings with non-String errors?

[Magnus Therning]

I've looked at polyparse and attoparsec and they seem to have in common that
the error always is a String.  My current ideas for a project would be a lot
easier if I could just return some other type, something that I can pattern
match on.

Is there a parser combinator library out there that works on bytestrings and
allows using a custom error type?

Or maybe there's some very basic reason why String is so commonly used?

/M

-- 
Magnus Therning                        (OpenPGP: 0xAB4DFBA4)
magnus＠therning．org          Jabber: magnus＠therning．org
http://therning.org/magnus         identi.ca|twitter: magthe

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