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I don't think this would not be a significant cost. Only the package declaration would have to be checked ...
Is that true? What about?:
But also, once you start trying to validate this, what other additional rules are you going to add? Should we allow package _::_::_;?
That said, I'm fine with Perl's "if you want to do something stupid, who are we to stop you?" philosophy.
I also think that we should stick to that principle.
With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.