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Postings from December 2008
* Chip Salzenberg <chip@pobox.com> [2008-12-06 01:45]: > I have no reason to actively reject aliasing; it's a nice > feature and, in the 'rw' case, it's a SMOP based on a couple of > different CPAN modules. You should be aware, however, that > _efficient_ _read-only_ aliasing - which is the Perl 6 default > - may be a high-wire act in Perl 5's core. I would not be > surprised if only 5.12 could support it. Personally, I make use of read-write aliasing quite a bit – most often not for direct manipulation of arguments in the sub itself, but to pass on the alias-ness, eg. so I can guarantee that a closure that’s also passed in will be able to mutate the other arguments. I wouldn’t care much about ro aliasing. I guess it would be nice as a defensive tool, but I can’t think of any case where it would ever have helped me. I would care about efficient ro aliasing as part of a COW scheme to speed up pass-by-value; but then it’d be an implementation detail, not something surfaced in syntax. Regards, -- Aristotle Pagaltzis // <http://plasmasturm.org/>Thread Previous | Thread Next