For instance, if I have a "$program->run" and a "$dog->run" I don't want to be able to call $foo->run() and have it work with both dogs and programs.

What's wrong with each providing a run method? If I'm iterating over a collection, I will not be putting both a program and a dog in the same collection. If I do, I probably have a serious confusion in my code. But what if I have a list of animals?

foreach my $animal (@animals) {
    $animal->run;
}

[download]

That's what polymorphism is all about. Fortunately, that's very easy to do in Perl. Perl does provide many of the most useful OO features in Perl. What it lacks is easy to use encapsulation.

As for getters and setters, can you think of any popular language with OO features that doesn't allow them? This isn't a Perl issue as far as I know. It's an issue with programmers treating objects as structs with methods calls. In fact, this is not a Bad Thing, so long as it's used appropriately.

I think this could be accomodated for in the oft-unused Perl message-signature feature, which right now only takes basic types.

Can you provide an example? I'm curious. If you're referring to prototypes (I don't think you are), then you should be aware that those are checked at compile time while method dispatch is resolved at runtime, thus making prototypes useless on method calls.

Cheers,
Ovid

New address of my CGI Course.

In reply to Re: Re: Re: perl6 & OO by Ovid
in thread perl6 & OO by chance

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