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Re: A novice's thoughts on applying Demeter to extension code

by dragonchild (Archbishop)
on Nov 22, 2004 at 20:34 UTC ( [id://409727]=note: print w/replies, xml ) Need Help??


in reply to A novice's thoughts on applying Demeter to extension code

Update: Of course, it would help if I actually remembered that sub PACKAGE::name {} is legal syntax. *sighs* It's Monday.

What about plugging in your new logic into the original namespace?

package Employee::MyStuff; package Employee; sub ManagersCostCenter { my $self = shift; $self->Manager->CostCenter; } 1; __END__
Put that into Employee/MyStuff.pm and you're good to go.

Of course, you're now fiddling with the internals of a class you don't control, which means that you're violating encapsulation. You also, everywhere you use Employee, have to now do:

use Employee; use Employee::MyStuff;
In that order would be preferable (though not absolutely required).

This is a somewhat common thing to do on CPAN. (q.v. URI and URI::QueryParam for a good example of this)

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