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Postings from March 2008
$ perl -le 'sub localdie { local $@; die "DIED\n" }; eval {
localdie(); }; print $@||"cleared\n"'
cleared
> Why? The docs doesn't say this. The fact that die actually sets $@
> and not the outer eval { } that does the assignment is not mentioned
> or even hinted at in the docs, and there is little benefit from this
> behavior.
i don't think it is accurate to say "die sets $@"
I believe eval sets $@ to whatever the "death rattle" of the contents
were, and die
is a way of forcing such.
I believe local sets aside the current value of something until its
scope is torn down,
then it assigns it back.
I believe the confusion arises from lack of explicit documentation of
the order of
the two operations in question here, which are, in the order they appear to be
happening, 1: assignment of "DIED\n" to $@ 2: restoring the old value
I think it is reasonable to expect the assignment of the death rattle to $@ by
the eval framework would occur _after_ the stack frame is torn down including
the restoration of local variables.
I think Abigail can be something of a show-off.
--
... but world war IV will be fought with rocks
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