Let me try again. How about $#- .

Again from perlvar:

One can use $#- to find the last matched subgroup in the last successful match. Contrast with $#+, the number of subgroups in the regular expression.

Some code that might or not result in what you want (as I am still not sure where you are going with this.) 

use strict;
use warnings;

local $\ = $/;
my $text = "abc123def";

my $text_match = qr/((\D+)(?{ print $#- })(\d+)(\d+))/;
$text =~ $text_match;

$text_match = qr/(\D+)(?{ print $#- })(\d+)(\d+)/;
$text =~ $text_match;

$text_match = qr/((\D+)(\d+)(\d+))(?{ print $#- })/;
$text =~ $text_match;

$text_match = qr/((\D+)(\d+)(\d+)?(?{ print $#- }))/;
$text =~ $text_match;

$text_match= qr/((\D+)((\d+)(\d+)))(?{ print $#- })/;
$text =~ $text_match;

__END__
2
1
4
3
5

[download]

-enlil

In reply to Re: Finding the right $<*digit*> capture variable by Enlil
in thread Finding the right $<*digit*> capture variable by diotalevi

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.