I'm looking to extract the expression that start with the CONSTANT, it could appear in any part and inside of any code, so i placed a couple of example to show you, the only "constant" part is the CONSTANT it self, the other part may vary between situation, let start:

#!/usr/bin/perl

#this are a couple of example
$_ = <<'REGEXP';
$one = CONSTANT . 'string' . $obj->new[0] . $variable . "string" . $ob
+j->method("some".'thing'.$more);

$some->method(
CONSTANT . $obj->new[0] . 'string' . $obj->method("some".'thing'.$more
+). $variable .  "string"
,
 "NOT INCLUDED"
);

sub(
CONSTANT . 'string' . $obj->new[0] . $variable . "string" . $obj->meth
+od("some".'thing'.$more)
);

REGEXP

#let's magic begin!
while (/

CONSTANT # begin the search with this string

   (?>  #start looking but not return if fails
        "[^"]*" # catch every thing within double quotes
           |    # or

        '[^']*' # catch every thing within single quotes
           |    # or

        (\(     # if its a parentheses 
            (?> #start looking but not return if fails
               [^()]++ # catch every thing that is not a parentheses
                |      # or
               (?1)    # if its a parentheses make a recursion in it
             )
         \))+

           |    #or same as above but looking square braket

        (\[     # if its a square braket
            (?> #start looking but not return if fails
               [^\[\]]++ # catch every thing that is not a square brak
+et
                |      # or
               (?2)    # if its a square braket make a recursion in it
             )
         \])+

           |     # or

           [a-zA-Z0-9_.\-\>\s\$]++ #looking only this string "." is po
+int

           |     # or

           (?R) # if those individual regexp fails, make a recursion,
                # only stop when all fails
     )*
/xgo) {
    print "$&\n";
}

[download]

The problem with it, is the magic not begin, in fact, don't work at all

What i'm doing wrong?

In reply to RegExp, the magic not begin by perlmonkdr

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.