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Date: Tue, 12 Jan 2010 18:09:25 -0800
Message-ID: <c25f8d341001121809w4640c98as273603ef758384d5@mail.gmail.com>
To: Chris Stockton <chrisstocktonaz@gmail.com>
Cc: internals@lists.php.net
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Subject: Re: [PHP-DEV] __toString(), __toArray()
From: 0xcafefeed@gmail.com (mm w)

don't worry it's only for people who are working with MVC and
RootObject structure, there is too much magics already and __cast is
not needed at all,
as we cannot monkey patch to add an observer on itself, a nice
solution should have a catchable object so __catch any calls

function __catch($data, $type) {
    if (method =3D=3D $type) {
         if (data[selector] =3D 'setValue' && observedValueForKeyPath) {
             $this->_setValue(($data['arg']);
             return;
         }
    }
    continue_natural_call();
}

we could imagine to have a root-object-built-in-class that is
naturally observable, or a root classObject at all, anyway it's only
something for people who are doing OO programming,
so don't worry

On Tue, Jan 12, 2010 at 2:40 PM, Chris Stockton
<chrisstocktonaz@gmail.com> wrote:
> Hello,
>
> On Mon, Jan 11, 2010 at 8:32 PM, mm w <0xcafefeed@gmail.com> wrote:
>> cast is not needed in PHP
>>
>> i 'd rather be more interesting in
>>
>> class Obj {
>> =C2=A0 =C2=A0 function __catch($data, $type) {
>> =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0//$type [ static_method, method=
, get_property, set_property]
>> =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0if (observed && =C2=A0$type =3D=
=3D set_property && somevalueIsObserved) {
>> =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0$observer-=
>notify("somevalue::valueWillChanged");
>> =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0$this->som=
evalue =3D $data['somevalue'];
>> =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0$observer-=
>notify("somevalue::valueDidChanged");
>> =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0} else {
>> =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0continue__=
call();
>> =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0}
>> =C2=A0 =C2=A0 }
>> }
>
> What? ...
>
>>> Etienne Kneuss wrote:
>>> This is where operator over-loading would be useful however perhaps onl=
y
>>> explicit casts would make sense here.
>
> I beleive adding a __cast(string $type) would be a useful feature for
> me, very often I have a toArray method defined. I agree with you that
> due to unexpected edge cases with operator precedence and general type
> juggling that __cast should only be called on explicit (cast).
>
> I.E.:
> class Int { public function __cast($type) { return 'int' =3D=3D $type ? 1=
5 : 0; } }
> $r =3D new Int;
>
> var_dump($r + 1); // 2
> var_dump((int) $r + 1); // 16
> var_dump((bool) $r + 1); // 1
>