Re: AW: [PHP-DEV] Method overloading by method signature

Posting to newsgroup php.internals, you wrote: > > But if you want to be more strict and limit the coder to use your > > functions only with a specific parameter signature (and thats the > > The purpose of signature overloading in most languages isn't input type > control, it's different functionality on different types. However, > unlike many other languages, PHP does not have static typing, and that > would not allow to know which function is called immediately, only at > runtime. This has both performance impact and code transparency impact - > you wouldn't know which function will be called until runtime. I am not > convinced this added complexity serves any real need - though you are > welcome to prove otherwise, i.e. present some use case when one can't do > without signature overloading. > > > only reason to use type hints - to ensure the method is used > > correctly and build more robust applications), it is better to tell > > BTW, I'm not sure how exactly it makes the code more robust - if you > call it with wrong type and it's not checked, the app would probably die > on fatal error. If you call it with wrong type and it is checked, the > app would die on fatal error couple of lines above. Unless you use some > kind of static analysis tool to verify your app prior to deployment (if > you know such tools please tell me!) I don't see much difference here, > mostly syntax sugar and enforcing right style (which is not bad - just > it's not that big a deal). > > > lost in this move (boo!). No longer can you override a method & > > provide an incompatible signature. This mixture of strict OO + PHP's > > traditional loose typing is really shooting PHP in the foot. > > If you don't want strict signatures - why you are using them? Nobody > forces you to type your arguments. And inheritance is certainly not for > overriding objects with incompatible signatures, if you try to do it you > are misusing it. > > > I think, that this ist the reason why nearly nobody uses this great > > new feature (to ensure that the passed parameters are correct), > > The above statement is not true. This feature is used by many > developers. Please stop using "unless you do it my way, nobody will use > PHP" argument - it doesn't work. > -- > Stanislav Malyshev, Zend Software Architect > stas@zend.com http://www.zend.com/ > (408)253-8829 MSN: stas@zend.com Ciao, ___ /_|_\ Umberto Salsi \/_\/ www.icosaedro.it