I think I understand what you're trying to do here. While I don't have the brain cycles to process the exact regexp you have there, could it be that the problem you're seeing is just because you're using double quotes (") when you should be using a single quote ('), in the hash definition? 
my %taglist_complex = (
        'email' => "<a href='mailto:$1'>$2</a>",
        'url'   => "<a href='$1'>$2</a>",
        'img'   => "<img src='$1' alt='$2' />"
    );

[download]
$1 and $2 are getting extrapolated in this definitions, while I think you mean to have them there as literals.

-- Dan

In reply to Re: Drop in regex replacements? by zigdon
in thread Drop in regex replacements? by IOrdy

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.