It's not a mistake. It's a preference. All three styles (package declaration outside the block, package declaration inside the block, and no block at all with file scope) work, and all have their own little pros and cons (none of which rise to the significance of such 'mistakes' as coding errors, syntax abuses or obfuscations).

Unfortunately, such relative trivialities sometimes get overly exaggerated (even to the point of becoming flame wars); thereby distracting everyone from important topics such as xdg's excellent contribution to the Perl community which he has announced in this thread.

Remember: There's always one more bug.

In reply to Re^3: Introducing Class::InsideOut by jdhedden
in thread Introducing Class::InsideOut by xdg

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.