Re: match nested tags

DJ Stunks wrote:
FangQ wrote:
> is there a simple way using regular expression to find nested tags?
>
> for example, the string is:
>
> {{ {A} this is part A of the document
> {{ {A.1} this is part A1 }}
> }}

Allow me to just reply to myself here... :P

I repaired my crummy grammar and posting technique (who would have
thought __END__ would end up in __DATA__?). My grammar now parses and
is shown below (getting there!), now I need to concentrate on getting
the output hash right.

Also, I'm not able to have a { or } in the part_text, which I expect
would be a problem in the real world.... I don't know how to
incorporate Text::Balanced here though....

I'll keep working on it.

#!/usr/bin/perl

use strict;
use warnings;

use Data::Dumper;
use Parse::RecDescent;

my $grammar = <<'EO_GRAMMAR';
<autotree>

document : part(s)

part : '{{' part_id part_text part(s?) '}}'
part_id : '{' /[^}]+/ '}'
part_text : /[^{}]+/

EO_GRAMMAR

my $parser = Parse::RecDescent->new($grammar)
or die "Could not parse grammar: $@";

my $document = do {local $/; <DATA>};

my $doc_ref = $parser->document($document)
or die "Invalid document";

print Dumper $doc_ref;

__DATA__
{{ {A} this is part A of the document
{{ {A.1} this is part A1 }}
}}

-jp

.

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