Okay, so if I'm understanding these comments correctly (which is not
guaranteed since I don't grok typeglbos and I've never touched Prolog or used a "with" statement,
we're back to := just saving keystrokes. It isn't lazily evaluated.
Which just doesn't seem right, I have to be missing something.
So how is $bound := %data{$key} different
from $bound = \%data{$key} aside
from the latter being a reference? (And since we'll have
automatic dereferencing to the expected context, that
shouldn't be a problem, correct?)
I now see that = still slurps, so (@a, @b) := (@b, @a) isn't easily reproduceable, and thus
we have a clear use for :=....but is that really the extent of it?
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