You say want a regex to do something, but all of your examples place a loop outside of a substitution. Regex can't do substitutions. There's some disconnect in your explanation.

we know that recursion can do whatever iteration can;

Yes, a loop can be implemented using recursion. That doesn't mean you need recursion to count from 1 to 10. You need a loop, no matter how it's implemented.

In reply to Re^3: Recursive substitution by ikegami
in thread Recursive substitution by JadeNB

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