If you want fancier applications of this pattern please refer to the links I gave.

Here's an even simpler implementation. sub f4{ return $_[0] }

Of course, as soon as the recursive sub starts doing anything remotely requiring recursion your 'pattern' falls apart like bad knitting.

Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.

In reply to Re: Syntactic sugar for tail call optimizations by BrowserUk
in thread Syntactic sugar for tail call optimizations by LanX

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