That breaks the ability to easily PreCompile (which is rather major) because the user must provide AddHash and the user must be main::. Breaking encapsulation in this fashion also prevents more than one instance of the parser from being used at a time. Fix: 

use strict;
use warnings;

use Parse::RecDescent ();
use Data::Dumper qw( Dumper );

my $grammar = <<'__END_OF_GRAMMAR__';

   {
      use strict;
      use warnings;
   }

   test : <rulevar: local %data >
        | expr(s) /^\Z/ { \%data }

   expr : name '=' /\d+/
          { $data{ $item{name} } = $item[-1]; 1 }

   name : /\w+/

__END_OF_GRAMMAR__

my $parser = new Parse::RecDescent($grammar) or die;
my $data = $parser->test("x = 1 y = 2 z = 3") or die;
print Dumper $data;

[download]

( Note: I prefer the solution I posted last night because it doesn't break if backtracking occurs like this one and this one's parent do. )

In reply to Re^2: How do I return a hash from Parse::RecDescent? by ikegami
in thread How do I return a hash from Parse::RecDescent? by GrandFather

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.