I see two problems with that. First, what if you want a typed variable that's empty?

my Dog $spot; # new Dog my Dog $dog = $spot; # oops - create a Dog just to destroy it

The other problem I see with making that change is that every use of my winds up with run-time overhead to call attributes::import. If you limit it only to my statements with types, that might be OK, but the more general case would suggest that my $rover would call attributes::import in the current package with an empty list, too.

In either case, I think it's too much overhead for the sake of some nice object constructor syntax.

That said, ++ for cool exploration of attributes.pm. That attributes as constructor trick might be useful for quick-and-dirty generic objects with dynamically-generated accessors.

my Object $soldier : name rank serial_no; $soldier->name( "Damian" );

-xdg

Code written by xdg and posted on PerlMonks is public domain. It is provided as is with no warranties, express or implied, of any kind. Posted code may not have been tested. Use of posted code is at your own risk.


In reply to Re: my Dog $spot; by xdg
in thread my Dog $spot; by Zaxo

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.