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Postings from January 2001
>>>>> "GNat" == Nathan Torkington <gnat@frii.com> writes:
GNat> Johan Vromans writes:
JV> My point is that unlogical exceptions like @a = (++$i,++$i,++$i)
JV> are hard to explain, and make people turn away from Perl.
GNat> Could the optimizer spot multiple side-effects in an expression
GNat> and pessimize it accordingly?
If you mean a syntactic expression, then yes, I think that would be
possible. In general, though, side effects might be hidden in
subroutines, AUTOLOADed subroutines, evals, etc:
perl -e 'sub f {++$i}; print ++$i, f(), "\n"'
It doesn't seem obvious to me that there's an easy or foolproof way to
do this, though, and a half-right solution would probably be worse
that a the current situation, at least as far as being predictable and
explainable.
-- Stephen McC
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