You appear to have misunderstood. I didn't say that eliminating recursion was bad, I said that using goto &{...} nearly always is. There are probably better ways to do this in perl but one of the "best" ways I know of is to just go back to the top of the routine after setting @_ with the new args. For short routines and such.

sub foo {
    {
        ...

        # Recurse but without actually calling foo() again.
        @_ = ...;
        redo;
    }
}

[download]

I also expect that there are better ways to save on memory than eliminating stack frames.

⠤⠤ ⠙⠊⠕⠞⠁⠇⠑⠧⠊

In reply to Re^3: Tail recursion elimination by diotalevi
in thread Tail recursion elimination by billh

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.