juerd@ouranos:~$ perl -MO=Deparse -e'print qw(a b c)'
print 'a', 'b', 'c';
-e syntax OK

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qw is expanded before the code runs. At that time, variables usually have no value yet. Interpolation would mean delaying until runtime, of having very unexpected results. Of course, it could still optimize for the variableless case, but that would mean that qw($foo $bar) is many times slower than qw(foo bar).

Juerd # { site => 'juerd.nl', plp_site => 'plp.juerd.nl', do_not_use => 'spamtrap' }

In reply to Re: qw "$string $string" doesn't interpolate by Juerd
in thread qw "$string $string" doesn't interpolate by QM

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