Yep, Data::Dumper also works, it's just not as "cool".

Here's an alternate that only allows Flatten, in, or out (but note that multiples are allowed) 

#!/usr/bin/perl

# http://perlmonks.org/?node_id=1196747

use strict;
use warnings;
use Data::Dumper;

while(<DATA>)
  {
  /RepeatingGroup\s*=\s*
    (?<GroupID>\b\w+\b)
    (\s*,\s*
      ((?<Flatten>\bFlatten\b)|(?<Direction>\b(in|out)\b))
    )*
    \s*$/x or next;
  print $_, Dumper \%+;
  }

__DATA__
RepeatingGroup = Waiver, Flatten, out
RepeatingGroup = Waiver, out
RepeatingGroup = Waiver, out, Flatten
RepeatingGroup = Waiver , in
RepeatingGroup = Waiver , Flatten
RepeatingGroup = LEI, out, Flatten

[download]

In reply to Re^2: Regex with lookahead by tybalt89
in thread Regex with lookahead by ericwsf

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.