Hi there, The following code generates the all possible matches of the regex a(.*)a ========================== 
    $str = "abracadabra";

     my @substrings;
     $str =~ m/ a (.*) a (.*)(?{push @substrings, $^N}) (?!) /x;
     use Data::Dumper 'Dumper';
     print Dumper [ @substrings ];

[download]
============================= if i use for the matching line 
    my $regex="a (.*) a(.)*";
    $str =~ m/ $regex(?{push @substrings, $^N}) (?!) /x;

[download]
gives the error 
Eval-group not allowed at runtime, use re 'eval' in regex m/ a(.)*a(?{
+push @subs
trings, $^N}) (?!) /

[download]
one second question how could i keep the positions of the matches and the lengths beside the matches themselves 
$str =~ m/$regex(?{push @substrings, [$^N,$pos,length $^N]}) (?!) /x;

[download]
any suggestions? thanks in advance.

In reply to all matches by oz

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.