Re: Why isn't base class constructors or destructors required to be called?

P.S. This also just covers _half_ of the equation; destructors are not covered. ----- Original Message ----- From: "Terje Slettebø" <tslettebo@broadpark.no> To: "Johannes Schlueter" <johannes@schlueters.de> Cc: <internals@lists.php.net> Sent: Thursday, September 14, 2006 9:17 PM Subject: Re: [PHP-DEV] Why isn't base class constructors or destructors required to be called? > Hi Johannes. > > > you should look harder: > > > http://www.php.net/~derick/meeting-notes.html#function-require-construct-to-force-calling-the-parent-s-constructor > > Thanks for your reply, but I've actually seen that one. However, no _reason_ > for not allowing/requiring this in "userland" is given. Only the > conclusions: > > "Conclusions: > - We add a flag to the class structure to record this > - We do not add new syntax for this to userland" > > Reading this again, I'm wondering if I interpret it right in that there will > be no way to enforce this in PHP code? If so, why not? > > Regards, > > Terje > > > Terje Slettebø wrote: > > > Hi all. > > > > > > Another issue. :) As usual, I searched the archive first, but found only > a > > > few postings from 2004 on the subject, without much clarification, so > I'd > > > like to pose the question again. If this has been discussed, I'd welcome > > > hearing what was the outcome of it. > > > > > > In PHP, unlike other languages with support for OO (such as C++ and > Java), > > > base class constructors are not automatically called (or enforced being > > > called). I wonder why this is so? If the answer is "flexibility", has > the > > > issues arising from this been seriously considered...? > > > > > > This means that if I make a base class "Base", which needs to have its > > > constructor and/or destructor called, to be initialised properly, > there's > > > currently _no way_ to enforce that, in PHP (that I know of). This means > you > > > risk half-constructed and half-destructed objects around, and in that > case, > > > program correctness is compromised. > > > > > > Regards, > > > > > > Terje > > > > > > > > >