Hi fellow monks,

We would like to write our own operand, an or that is based on if the first value is defined rather than if it is false or not. We were wondering if there is a way to create one's own operands. We see how to override one and know that or is not one we can override. We really just want to create our own.
We also know we can do:
defined( $foo = $bar->id ) or $self->error('blah blah')

What we want to be able to do is:
$foo = $bar->id definedor $self->error('blah blah')

Thanks for any advise.

Note: Thanks to jdporter for the advise but we are running 5.6.1 on our server and that does not work.

20060715 Unconsidered by Corion (Keep: 11, Edit: 15, Reap: 0): Was considered for : Retitle: create 'defined-or' (nav, search improvement)


In reply to creating operands by pvilleSE

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.