Beefy Boxes and Bandwidth Generously Provided by pair Networks
go ahead... be a heretic
 
PerlMonks  

Comment on

( #3333=superdoc: print w/ replies, xml ) Need Help??
I played around with your code (well, actually I used Stephens's code for simplicity) and found a solution that amazed me: If you add 'o' to the regex operators (making it '/ego') everything works as expected. Here's my code:
#!/usr/bin/perl -w use strict; print doFunc("MAIN", "B(1)+C(2)") . "\n"; sub doFunc { my ($theFunc, $rem) = @_; my $re = &get_re($rem); $rem =~ s/(\w+)\(($re)\)/&doFunc($1,$2)/eog; return "func $theFunc returns <$rem>"; } ## ### When we're called with the initial ### state, return "1|2". Otherwise, return ### our input, quotemeta'd. ### sub get_re { my ($in) = @_; if ($in eq "B(1)+C(2)") { return '1|2'; } else { return quotemeta ($in); } } exit (0);
Sorry that I can't tell you why perl is behaving like this. '/o' shouldn't change the behavior at all (at least that's what I though) and $re doesn't change either.. Maybe perl messes up the namespaces when doing recursive calls using a regex? I really don't know..

By the way: When I'm not using the '/o' operator and trying to print to STDERR just before the regex is executed my perl (5.6.1, linux 2.4.2) coredumps on me..

Regards, -octo-

In reply to Re: recursive /eg fails by flocto
in thread recursive /eg fails by I0

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!
  • 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, 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, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • Outside of code tags, you may need to use entities for some characters:
            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.
  • Log In?
    Username:
    Password:

    What's my password?
    Create A New User
    Chatterbox?
    and the web crawler heard nothing...

    How do I use this? | Other CB clients
    Other Users?
    Others examining the Monastery: (6)
    As of 2014-09-19 05:46 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?

      How do you remember the number of days in each month?











      Results (130 votes), past polls