I recall you have been studying the :lvalue attribute for subs. Reflect that that attribute is more than a tag that you may query at runtime like some kind of metadata. I'm not sure how I'd go about querying that.

When the :lvalue attribute is applied to a sub, it changes how the sub is compiled and what usage is permitted of it.

The description of attributes as tags to be queried sounds a lot like the "properties" Lisp can attach to a symbol. I think that's a mischaracterization.

A read of the Attribute::Handlers pod suggests that magic outside runtime is what attributes are for. Those docs give some non-trivial examples. I suspect that perldoc -m Attribute::Handlers will yield lots of wisdom on the matter, but I know for a fact it won't be easy ;-)

I'm sure that perl attributes would benefit from more of us experimenting with them.

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