Re: [Haskell-beginners] Parsec

Ah wait ... I saw that I can get the input stream with getParserState, as it is part of the state. If that is the currently remaining stream, I could use any functions from ByteString to skip over some parts or do whatever with them, and update the state to the last position after the part I want to skip. Am I correct there, or am I then getting something in Parsec out of sync? Guess I'll just try :) Thanks! Christian 2010/8/6 Patrick LeBoutillier

Hi,

I started using Data.Binary yesterday for a project and it's nice. I'm not sure it's possible, but perhaps you could switch tools along the way:

- Parse the ASCII bit with Parsec ; - Give the remaining ByteString to Data.Binary for the binary part ; - Switch back and forth as required.

Patrick

On Fri, Aug 6, 2010 at 5:03 AM, C Gosch wrote:

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2010/8/6 Dean Herington

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At 11:42 PM +0200 8/5/10, C Gosch wrote:

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Hi, does anyone here know their way around in Parsec? I'm trying to parse a file which contains some binary parts too. I have been using Parsec 3.0.1 to parse the first ASCII part, but all

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parsers are returning Char type tokens, so it would not work with the binary parts .. is there any way to do this? I am using Text.Parsec.ByteString.Lazy.

Note that I'm new to Haskell and Parsec, and doing this within a small project that I basically do to get a grip on Haskell (and Parsec, because it appears to be really nifty and I want to learn more about it).

Thanks for any hints, Christian

Parsing binary parts of a file is not inherently a problem. A parser can return any type; different parsers in your application will likely return different types.

If you include some code we'll be able to help you more specifically.

Dean

You're right, I probably used the wrong words .. I meant that apparently

the the

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tokens Parsec uses are of type Char, and I would actually at some point like to continue parsing, but using different tokens. Sorry if I still got it wrong, I'm new :) I can post some code later, as I don't have it here right now.

Cheers, Christian

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-- ===================== Patrick LeBoutillier Rosemère, Québec, Canada