in reply to Local for lexicals

What I'm looking for is something that doesn't do any copying, but, rather, literally sets aside the variable and then restores it later.

Why did you post this as an update instead of replying to my node? I would have told you earlier that my solution does no copying. Please have a second look. If you still don't understand, let me know where you think copying is occuring.

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Re^2: Local for lexicals
by JadeNB (Chaplain) on Aug 12, 2009 at 18:08 UTC
    Why did you post this as an update instead of replying to my node? I would have told you earlier that my solution does no copying.
    Right on both counts, of course! I'm very sorry for not replying to your node; I was overwhelmed by the number of replies and the subtleties that came up as I tried to test them against my (un- and under-stated) expectations, and so went the lazy way of just updating the main post rather than replying to everyone individually.

    It was this line:

    alias my $temp = $$xr;
    skimmed quickly, that made me think that there was copying, because I'm not familiar with the semantics of Data::Alias; I'm sorry for misunderstanding, and I will update my update accordingly.

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