I agree that if you want to optionally change caller's behaviour, then you can get tail-recursion to work.

However I am having extreme difficulty in seeing how, even in principle, one could make your more complex approach work. One could save memory by compressing the information in the caller stack. But I fail to see how one could regenerate the intermediate results in a complex computation on demand without redoing the computation - and that only works if you readily know (which you don't in Perl) that the computation is side-effect free.

In reply to Re: Re: Re: Iterative vs Recursive Processes by tilly
in thread Iterative vs Recursive Processes by mvaline

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