XML::Twig - provide additional parameters to twig

kejv2 has asked for the wisdom of the Perl Monks concerning the following question:

Hello all,

I am parsing a xml file using XML::Twig like this:

XML::Twig->new(
    twig_roots => {
        'div' => \&div
    }
)->parsefile("my_file");

sub div {
  my ($t, $elt) = @_;
  # do something
  return 1;
}
[download]

I have a run-time parameter which I want to get in div (or any other) element handler. How can I do this?

I would expect something like putting this parameter into XML::Twig constructor and then getting it from twig $t element. But there is nothing like this described in the documentation. The only way I can think about is to define own element handling package with method returning my parameter and putting this package as elt_class option into XML::Twig constructor. But that seems terribly artificial to me.

Any better ideas?

Comment on XML::Twig - provide additional parameters to twig_roots handlers Download Code

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Re: XML::Twig - provide additional parameters to twig_roots handlers by remiah (Hermit) on Sep 30, 2012 at 20:40 UTC
I guess you are looking for 4.6 A simple HTML+ converter example.You can pass your $para to your function like this. `XML::Twig->new( twig_roots => { 'div' => sub{ &div(@_,$para); }, } )->parsefile("my_file");` [download] and use it in your function `sub div { my ($t, $elt,$para) = @_; ...` [download] I hope I understand your intention...	[reply] [d/l] [select]
Re: XML::Twig - provide additional parameters to twig_roots handlers by Jenda (Abbot) on Oct 01, 2012 at 07:11 UTC
This has been discussed about two weeks ago in XML::Twig newbie question. Jenda Enoch was right! Enjoy the last years of Rome.	[reply]
Re^2: XML::Twig - provide additional parameters to twig_roots handlers by kejv2 (Acolyte) on Oct 01, 2012 at 19:29 UTC
Ah, so the solution is to use slight closure trick instead of being provided by the module itself, but that's ok. It's a pity that the topic you are referencing isn't properly named. Otherwise I could have maybe found the info myself...	[reply]
Re^3: XML::Twig - provide additional parameters to twig_roots handlers by Jenda (Abbot) on Oct 01, 2012 at 22:16 UTC
The thing is that you may very well want to have several different twig roots with different handlers and different piece of data to pass. XML::Twig could have given you a "pad" within the parser object that you could use to store something in between the handler calls, but (at least according to a quick scan ... I don't use XML::Twig myself) seems mirod did not think it's necessary. Yes, I agree that other thread is a bit hard to find. Jenda Enoch was right! Enjoy the last years of Rome.	[reply]
Re^4: XML::Twig - provide additional parameters to twig_roots handlers by mirod (Canon) on Oct 03, 2012 at 12:34 UTC
Re^5: XML::Twig - provide additional parameters to twig_roots handlers by Jenda (Abbot) on Oct 03, 2012 at 19:00 UTC
Re^5: XML::Twig - provide additional parameters to twig_roots handlers by Anonymous Monk on Oct 03, 2012 at 15:18 UTC
Re^4: XML::Twig - provide additional parameters to twig_roots handlers by Anonymous Monk on Oct 03, 2012 at 15:11 UTC