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Date: Tue, 29 Jun 2004 19:57:13 +0200
Reply-To: Marcus Boerger <helly@php.net>
Message-ID: <1578803583.20040629195713@marcus-boerger.de>
To: Jason Davidson <jdavidson@zworg.com>
Cc: internals@lists.php.net
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Subject: Re: [PHP-DEV] Base and derived class construction
From: helly@php.net (Marcus Boerger)

Hello Jason,

to be honest i don't really care. Since i am a C++ guy who loves types
i'd appreciate automatic calling of inherited constructors/destructors.
But php does not have types and so the non implicit calling version
gives us a little bit more flexibility. Since we also don't have
polymorphism the current solution seems to fit best. I hope this is a
better answer. A thing which could be changed though (if we haven't
fixed down everything in that area) is to change to automatically call
inherited destructors.


regards
marcus


Monday, June 28, 2004, 12:12:32 AM, you wrote:

> Quite possible you had something else in mind, im just interested in
> knowing why its done this way, is it for performance sake, is it
> becuase you beleive php is more flexable this way, is it becuase it
> just happened to be as such... 
> Im not being critical, Im being curious...

> Jason

> Marcus Boerger <helly@php.net> wrote:
>> 
>> Hello Jason,
>> 
>> maybe this time we neither had c++ nor java in mind, this time it was
>> delphi.
>> 
>> regards
>> marcus
>> 
>> 
>> Sunday, June 27, 2004, 8:44:45 AM, you wrote:
>> 
>> > which languages is this normal too.. 
>> > if you refer to java, that uses the 'super' function, you need only
>> > explicitly call super if your constructor has arguments, otherwise an
>> > implicit call is made to the parents defualt constructor ( one with
>> > arguments).  
>> > c++ also will call the parent defualt constructor automatically as well
>> > i beleive.  
>> > that aside, i do release my mistake in the workaround,  ive noted the
>> > use of parent::__construct().
>> > im not really concerned with coding, i was more simply interested in why
>> > it was done this way,  in such a way, that a child class can be
>> > inherited with parent class construction.
>> 
>> > Jason
>> 
>> > Stefan Walk               <swalk@prp.physik.tu-darmstadt.de> wrote:
>> >> 
>> >> On Sat, Jun 26, 2004 at 08:03:12PM -0700, Jason Davidson wrote:
>> >> > Hi, is there a reason that when a child class is instantiated the parent
>> >> > class constructor does not get called?
>> >> > The obvious workaournd for this is to simply call
>> >> > $this->parentConstructor(); in the child class constructor, however,
>> >> > this seems strange.. 
>> >> 
>> >> parent::__construct(), to be exact :)
>> >> 
>> >> > 
>> >> > Am i way off base here...?
>> >> > 
>> >> > Thanks
>> >> > Jason
>> >> 
>> >> Most languages i know do that ("forcing" you to call super or alike).
>> >> The only small "annoyance" i see is that parent::__construct() doesn't
>> >> automatically use the parameters that were passed to the constructor,
>> >> but i think one can live with that.
>> >> 
>> >> Stefan
>> >> 
>> >> -- 
>> >> PHP Internals - PHP Runtime Development Mailing List
>> >> To unsubscribe, visit: http://www.php.net/unsub.php
>> >> 
>> >> 
>> 
>> 
>> 
>> 
>> -- 
>> Best regards,
>>  Marcus                            mailto:helly@php.net
>> 
>> 




-- 
Best regards,
 Marcus                            mailto:helly@php.net