[EMAIL PROTECTED] writes:
Leonardo Pedretti <[EMAIL PROTECTED]> writes:
> I would like (for code cleanliness purposes) to make 'new' return a
> reference to an already created object under certain circumstances without
> using a factory, is it possible?
A number of months ago, I proposed a similar feature, implemented as
overloading a __new() function. At the time, it seemed I was the only one who
wanted it, but your request is for a feature identical to my request. Here's
my previous message. (The whole thread can be found under the subject "new
overloading feature?" from 5 Nov 2004). I'd love for this to be revisited now
that there's someone else with a similar desire.
My previous proposal:
> I came across an interesting desire today. I'd like to create a new class
> instance if an only if a "key" value does not already exist. This key value
> could be looked up in a database, in an array, etc.
>
> The following contrived example shows use of a proposed __new() overload
> function which would be called BEFORE the constructor, and could chose to
> return a newly constructed object (by calling __construct()) or to return an
> already existing object.
>
> One could certainly call a function which searched for the key value and only
> instantiated a new object if the existing one was not found, but this seems
> cleaner.
>
> Thoughts?
>
> <?php
>
> class X
> {
> static $allX = array();
> var $val;
>
> function __construct($val)
> {
> $this->val = $val;
> X::$allX[] =& $this;
> }
>
> function __new($val)
> {
> foreach (X::$allX as $x)
> {
> if ($x->val == $val)
> {
> return $x;
> }
> }
>
> return __construct($val);
> }
> }
>
> $try1 = new X(23); /* would return $allX[0] reference */
> $try2 = new X(42); /* woudl return $allX[1] reference */
> $try3 = new X(23); /* would return $allX[0] reference */
> ?>
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