I might have encountered Peculiarities in using (??{...}) too, and I intended to inquire about them, but didn't want to deal with it yet (guess I'm about to though!). I wanted to match either non-single or non-double quote characters in a regex, depending on which type of quotes surrounded it. For example, since
$var =~ /(["'])[^\1]*?\1/;

[download]

doesn't work due to [^\1] not working, I tried something like
$var =~ /(["'])[^(??{"$1"})]*?\1/;
which worked unless $1 contained a special character (forgot the character, but it wasn't a quote), when it gave me an error. I tried various fixes, and finally got
$var =~ /(["'])([^"']|[^(??{"$1"})])*?\1/;
to work. I figured the [^"'] alternative that I added would match the problem character, eliminating the need for parsing the (??{"$1"}) construct, which had given me the error. Well, it worked until it didn't, for whatever reason. I think I created another patch (placed \Q and \E somewhere), which didn't work consistantly either. Then I spent several hours deleting all of the (??{...}) constructs and stuck with a simple .*? between the quotes. I'm just a beginner, so it's possible I did something wrong, but I don't know what.

In reply to Re: Re: Re: Perlre interpretation required by Wassercrats
in thread Perlre interpretation required by BrowserUk

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.