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Postings from March 2008
David Nicol wrote:
> On Fri, Mar 21, 2008 at 6:13 PM, Mark Mielke <mark@mark.mielke.cc> wrote:
>
>> Does this explain it Dave?
>>
>>
>
> but that doesn't work either; the problem is that $@ gets unlocalized after
> eval assigns to it, even when the argument to die has nothing to do with $@.
>
>
> perl -le 'eval { local $@; die "yabbazabba" }; print $@||"nothing there"'
>
> So including an attempt at pass-by-copy in the documentation of what
> doesn't work (1) indicates that thinking it might be a pass-by-copy problem
> is reasonable and (2) documents by example quoting as a method to force
> pass-by-copy.
>
I see what you mean now. Yes, I've hit this too. I may have
misunderstood the original problem as well. The issue being, that die
stores to $@ before $@ is restored to its original value, making the die
unavailable. If this is the original problem, then yes, it's not a
pass-by-reference problem, but a local vs my problem. When I hit the
above issue before, my conclusion was that local was the wrong choice
for $@ and that my would have worked a lot better(?). But again, a "too
late now, don't complain, just move on" is the route I took.
Cheers,
mark
--
Mark Mielke <mark@mielke.cc>
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