[Haskell-beginners] Laziness and XML parsing

Sean Hess seanhess at gmail.com
Tue Nov 8 15:03:57 CET 2011

Thanks so much to both of you that sent that link. 

Sorry, my email totally wasn't clear. I meant that the example in the package description doesn't run: http://hackage.haskell.org/packages/archive/xml-enumerator/

I'll read through that article. 

On Nov 8, 2011, at 7:01 AM, Michael Snoyman wrote:

> Here's a blog post on the package:
> http://www.yesodweb.com/blog/2011/10/xml-enumerator . It doesn't cover
> the streaming interface, but it might give you a good overview of the
> package in general. I'm not sure what you mean by "it doesn't run,"
> but you'll need at least a basic understanding of enumerators to get
> off the ground.
> On Tue, Nov 8, 2011 at 5:38 AM, Sean Hess <seanhess at gmail.com> wrote:
>> I cannot seem to find a working example of xml-enumerator. It doesn't run:
>> the names seem to have changed for some things, and I'm too much of a
>> beginner to figure it out easily.
>> http://hackage.haskell.org/packages/archive/xml-enumerator/
>> On Nov 7, 2011, at 7:59 PM, Felipe Almeida Lessa wrote:
>> On Tue, Nov 8, 2011 at 12:45 AM, Sean Hess <seanhess at gmail.com> wrote:
>> I want to parse a large xml file (2GB), without putting the whole thing into
>> memory. It's pretty simple with a sax parser in most languages, you just
>> stream bytes to the sax parser, and wait for sax events.
>> I recommend you taking a look at xml-enumerator [1] and
>> libxml-enumerator [2].  They are the SAX parsers you know from the
>> imperative world but much easier to write =).  In particular, you
>> don't need to rely on lazyness.
>> Cheers,
>> [1] http://hackage.haskell.org/package/xml-enumerator
>> [2] http://hackage.haskell.org/package/libxml-enumerator
>> --
>> Felipe.
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