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Date: Thu, 25 Mar 2010 16:00:25 +0100
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References: <690D1362-7F1D-47B9-A4BF-EEA9CF38C5B0@pooteeweet.org> <001601cacb74$0b037020$210a5060$@com> <9721DC06-BE10-49D0-BEDA-6B6FEB26B49D@stefan-marr.de> <slrnhqmqdv.382.dsp@experimentalworks.net>
To: David Soria Parra <dsp@php.net>
Subject: Re: [PHP-DEV] horizontal reuse: traits vs. grafts
From: mls@pooteeweet.org (Lukas Kahwe Smith)


On 25.03.2010, at 14:48, David Soria Parra wrote:

> Just as a general idea (which is certainly something after traits are =
implemented once)
>=20
> Scala offers stackable traits so that you can mixin traits during =
object creation.
> An example:
>=20
> trait Philosophical {
>    public function think () {
>        echo "Cogito ergo sum";
>    }
> }=20
>=20
> trait Drink {
>    public function drink () {
>        echo "gluck gluck"
>    }
> }
>=20
> $obj =3D new Person();
>=20
> $obj->think(); // will fail
>=20
> $obj =3D new Person() with Philosophical;
> $obj->think(); // works
>=20
> $obj =3D new Person() with Philsophical, Drink;
> $obj->drink(); // works
> $obj->think(); // works
>=20
> This approach is taken in scala and works pretty fine there for =
composing classes
> during runtime and should be douable in PHP too. For sure aliasing is =
not
> possible in this example.
>=20
> But as said just a general idea that I might try to work on once =
traits are comittet.
>=20
> Stefan what do you think about "stackable traits" ?


Woha .. that code really scares me.

regards,
Lukas Kahwe Smith
mls@pooteeweet.org