One effect of these rules is that -bareword is equivalent to the string "-bareword"
Not really quit!. Check with B::Deparse, then you will discovery that -bareword is equalvalent to -'bareword' not '-bareword' 

perl -MO=Deparse -e'
use warnings;
use strict;

my %ha = ( -foo => "bar");

print %ha;
'

[download]
gives 
use warnings;
use strict;
my %ha = (-'foo', 'bar');
print %ha;
-e syntax OK

[download]
Though with "-foo" there is no need of "=>".

In reply to Re^2: Why is this auto-quoted? by Anonymous Monk
in thread Why is this auto-quoted? by nbtrap

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