I'm not sure what you are arguing for or against; I'm saying the primary purpose of an :lvalue sub is to create an lvalue, and that there are many cases where the creation of the lvalue is separated in time and space from its setting.

A way to specify a validation routine could certainly defer back to the original sub, with opportunity to flag it as optimizable to suppress the original call in the simplest case of (non-localized) sassign.

In reply to Re^3: Experimenting with Lvalue Subs by ysth
in thread Experimenting with Lvalue Subs by Limbic~Region

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