Well, func4 is a closure. Perl sees that it uses a lexical variable from its declaration scope, so it keeps a link to that scalar value for the function to still be able to access it (and to prevent the scalar from being deleted at the end of the file). func3 holds no such link. Now I don't know what variable func3 acccesses, because the eval doesn't fail, but calling eval "$_[0]++" always returns 0 so it's not always the same var.

Instead of exporting a package variable I intended to return the value via 'eval' in a module function.
Honestly that sounds like a bad idea. Maybe you can use a hash instead.

In reply to Re: eval in perl package by Eily
in thread [SOLVED]: eval in perl package by MarcusE

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.