in reply to Passing results of a substitution to a function

You could do this ... whether you should is for your own concience:) 

sub blah{print +shift;}

my $word = 'BLAHBLAH';
blah( do{ (local $_= $word) =~ s/BLAH/COW/g; $_} );
# prints COWCOW
print $word;
# prints BLAHBLAH

[download]

Examine what is said, not who speaks.

The 7th Rule of perl club is -- pearl clubs are easily damaged. Use a diamond club instead.

In Section Seekers of Perl Wisdom