Here's an idea (dunno how portable she be): 

BEGIN {
     die "You must use 5.004 or 5.6.0 to run this script.\n"
       unless ( ($] >= 5.004 && $] <= 5.005) || 
                ($] >= 5.006 && $] < 5.006001) 
              );
}

[download]

I think that'll work, anyway =) 

perl -e 'print "How sweet does a rose smell? "; chomp ($n = <STDIN>); 
+$rose = "smells sweet to degree $n"; *other_name = *rose; print "$oth
+er_name\n"'

[download]

In reply to Re: use _specific_ version by arturo
in thread use _specific_ version by particle

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