perldoc -f use

use Module VERSION LIST
use Module VERSION
use Module LIST
use Module
use VERSION
Imports some semantics into the current package from the named module, generally by aliasing certain subroutine or variable names into your package.

perldoc perldata

the resulting list value is interpolated into LIST just as if each individual element were a member of LIST. Thus arrays and hashes lose their identity in a LIST--the list
(@foo,@bar,&SomeSub,%glarch)
contains all the elements of @foo followed by all the elements of @bar,

Update:So what happens is, that the array build using qw is, don't know how to put it, transformed into a list if given as an argument to use.
++theorbtwo, missed to scann the relevant docs :)
perldoc perlop

qw/STRING/
Evaluates to a list of the words extracted out of STRING, using embedded whitespace as the word delimiters.

regards,
tomte

Hlade's Law:

If you have a difficult task, give it to a lazy person --
they will find an easier way to do it.