my is a valid attribute name, so : my is presumed to be an attribute.

$d is not a valid attribute name, so : $d is taken to be the else expression of the conditional.

Thanks for the explanation! (I eventually figured out that it must be something like that, and updated my post; but probably it was after you had already begun yours.)

Since the word ‘attribute’ does not occur in perlop or perlsyn, and since no other punctuation mark requires a visit to perlfunc to figure out how it parses, I wonder if it might be appropriate for the precedence table to mention this unexpected (by me) interaction?

Note that conditionally executing my is officially undefined behaviour.

Good to know, thanks. Is there any unified list of officially undefined things? I know, for example, by luck, that $i++ + ++$i can officially do whatever it wants, but I had no idea about this; who knows what other corner cases I'm missing?

In reply to Re^2: Unexpected parsing by JadeNB
in thread Unexpected parsing by JadeNB

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.