You mentione extreme cases (Duff's Device, which is more about jumping into a looping construct), and some lesser used ones, but you fail to mention the prime reason there's a fall through with cases in C: 
    case  FOO:
    case  BAR: /* code here */
               break;

[download]

That is, having more values map to the same code.

How to do that efficiently in Perl? It depends. Sometimes a computed goto is the best way, sometimes a series of if statements. Both have the disadvantage they potentially spend a lot of time finding the code that needs to be executed. And depending on the values of the cases, and in which order they are, you could use an array of code references, and execute each code reference from the switched value to the end.

Abigail

In reply to Re: falling through cases? by Abigail-II
in thread falling through cases? by John M. Dlugosz

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.