I'm not talking about the kind of backwards compatibility that by definition every enhancement or bugfix breaks. I'm talking about the kind where completely unrelated things suddenly stop working, ala: 
$ perl5.10.0 -w
sub when { use POSIX "strftime"; strftime("[%Y-%m-%d %H:%M:%S] ", gmti
+me) }
warn when, "some warning";
__END__
[2007-12-23 20:51:11] some warning at - line 2.
$ perl5.10.0 -w
use feature ":5.10";
sub when { use POSIX "strftime"; strftime("[%Y-%m-%d %H:%M:%S] ", gmti
+me) }
warn when, "some warning";
__END__
syntax error at - line 3, near "warn when"
Execution of - aborted due to compilation errors.

[download]
Given that the whole point of the feature pragma is to require explicit enabling of stuff that is likely to break existing code, I really don't see automatically enabling it in Moose.

What happens when 5.12 comes out? Do you switch to enabling ":5.12" features? How many hundreds or thousands of modules do you hope will be using Moose by then?

--
CollegeGear.com - more than just college gear (though, yes, we have college-branded teddy bears)

In reply to Re^5: Trying to make perl suck less again by ysth
in thread Trying to make perl suck less again by EvanCarroll

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.