Hello all, check this Thesis about multiple inheritence and aggregation, especially chapter 9. It gives an excellent source for debate, and will explain the main differences between both techniques, the pros, cons, etc..
http://www.cs.tut.fi/~pets/pruuden97.pdf My vote is "java" like: no MI, no aggregation, single inheritence and use of interfaces :) ----- Original Message ----- From: "Yasuo Ohgaki" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]>; "Brad Lafountain" <[EMAIL PROTECTED]> Cc: "Zeev Suraski" <[EMAIL PROTECTED]> Sent: Monday, April 08, 2002 8:14 PM Subject: Re: [PHP-DEV] Re: aggergate vs MI > Brad Lafountain wrote: > *SNIP* > > But do you see my point that having ONLY aggregate means that in 90% of the > > case where people will use it its probally a bad idea. They are only using it > > becuase of the lack of MI. How does aggregation solve overwriting methods. > > > > class a > > { > > function blah() > > { > > echo "in a"; > > } > > } > > > > class b > > { > > function blah() > > { > > echo "in b"; > > } > > } > > > > class c > > { > > function blah() > > { > > echo "in c"; > > } > > } > > > > class d extends a,b,c > > { > > function blah() > > { > > echo a::blah() . b::blah() . c::blah(); > > } > > } > > With MI, documentation can be generated easily using tools. > *EASIER* to maintain code. > > > > > how do you do that with aggregation? MI really is way different than > > aggregation. > > > > I see aggregation used for adding methods to an existing class. > > class a > > { > > function do_a() > > { > > } > > } > > class b > > { > > function do_b() > > { > > } > > } > > > > $c = new stdclass; > > aggregate($c, "a"); > > aggregate($c, "b"); > > $c->do_a(); > > $c->do_b(); > > > > With aggregate, auto generating documentation hard. > *HARDER* (very hard, if one use it w/o good reason) to maintain code > > To me, aggregate is "GOTO" like feature. > It's useful for sure, Howver > _Never_ use unless there is very good reason. > > Therefore, it worth to have both MI and aggregate. IMHO > > -- > Yasuo Ohgaki > > > > > but i still don't like this... there are cleaner ways around that by using > > members and/or MI. > > > > - Brad > > > > > > __________________________________________________ > > Do You Yahoo!? > > Yahoo! Tax Center - online filing with TurboTax > > http://taxes.yahoo.com/ > > > > -- > PHP Development Mailing List <http://www.php.net/> > To unsubscribe, visit: http://www.php.net/unsub.php > > -- PHP Development Mailing List <http://www.php.net/> To unsubscribe, visit: http://www.php.net/unsub.php
