The only thing I regret is that matching non greediness has not been made the default.

Non-greediness is only useful if you have something following the non-greediness. For example, /(\d*)/ would not be useful at all: it would always succeed, matching and capturing an empty string. /(\d+)/ would be equivalent to /(\d)/, because a non-greedy expression doesn't take more than the absolute minimum.

If you use non-greedy quantifiers now, think about the efficiency that is gained by re-writing for greediness. Suppose you have /"(.*?)"/ - it can be written as /"([^"]*)"/, which is much more efficient. With backtracking disabled, as jryan did in his example (with the new : meta character), it's even more efficient (in case the subject string is not well formed). 

- Yes, I reinvent wheels.
- Spam: Visit eurotraQ.

In reply to Re: Perl6: too bad non-greediness is not made the default by Juerd
in thread Parsing with Perl 6 by jryan

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.