Same here. At work, we've recently removed "use constant" from our code and converted to Readonly due to Damian's advice. It's really cleaned up a lot of our code.

Unfortunately, there are some bugs in how Perl handle tie which Readonly exposes. For example, the following prints "no":

#!/usr/bin/perl -l

use strict;
use warnings;

use Readonly;
Readonly my $VAR => 'SEARCH';

foreach my $var ($VAR) {
    print +($var eq $VAR) ? 'yes' : 'no';
}

[download]

Clearly that's wrong, but it's related to Perl's tie mechanism and not Readonly. As a workaround:

 print +($var.'' eq $VAR.'') ? 'yes' : 'no';

That's ugly as sin, but it works :(

Cheers,
Ovid

New address of my CGI Course.

In reply to Re^3: Export Constants Common to Lots of Packages by Ovid
in thread Export Constants Common to Lots of Packages by jffry

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.