Thanks for that perspective. Here's another thought along those lines- at the minimum a role requires the composing class to implement some behavior (method). Maybe the role also has an implementation defined, which the class can just use. In that case, the role might want to have some data, or state, along with it, and then it's convenient for the role to also add an attribute- to support the method defined in that role.

And that's where you need to mesh with the larger framework. Or roll your own per-object attribute/state variable, but isn't it better to use what your framework already provides?

Then again, lack of attributes is not that big a deal. There's always package lexical hashes, or closures; also, getters and setters are just methods. And Role::Basic allows importing methods from some other class with that express purpose.

TMTOWTDI!

In reply to Re^4: Object::InsideOut and Roles/Mixins by Yary
in thread Object::InsideOut and Roles/Mixins by Yary

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.