Please take no offense; I understand that you see a real gap in what perl allows, but from my point of view, you want to highjack the existing mechanism to allow subs that can act like the substr builtin in order to provide quite different (and non-compatible) functionality.

I'm not sure I can sum up what's wanted from the existing :lvalue better than "subs that can do what substr does", and I have not been able to figure out what you mean by "temporise". Does that come even close to answering your question?

In reply to Re^14: Experimenting with Lvalue Subs by ysth
in thread Experimenting with Lvalue Subs by Limbic~Region

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