Current Perl documentation can be found at perldoc.perl.org.
Here is our local, out-dated (pre-5.6) version:
Why do you want to do thatNULL :-)
If you want to override a predefined function, such as
open(), then you'll have to
import the new definition from a different module. See Overriding Builtin Functions. There's also an example in Class/Template.
If you want to overload a Perl operator, such as
**, then you'll want to use the
use overload pragma, documented in the overload manpage.
If you're talking about obscuring method calls in parent classes, see Overridden Methods.