On page 208 of the original Camel (1st edition), There is a subroutine that I think will do what you want: 
sub enum {
    local($_)=@_;
    my(@specs)=split(/,/); #changed from local to my as it is preferab
+le since perl 5.
    my $val;
    for (@specs) {
        if (/=/) {
            $val = eval $_;
        } else {
            eval $_ . ' = ++$val';
        }
    }
}

[download]
An example of use is given: 
&enum(<<'EOL');
   $RED, $GREEN, $BLUE, $CYAN='a', $MAGENTA, $YELLOW,
   $BLACK=-1
EOL
print "$RED $GREEN $BLUE $CYAN $MAGENTA $YELLOW $BLACK\n";

[download]
would print: 1 2 3 a b c -1
I wonder who wrote this originally, Randal or Larry? Care to tell us merlyn?
-ase

In reply to Re: Enum by ase
in thread Enum by Anonymous Monk

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.