Newsgroups: php.internals
Path: news.php.net
Xref: news.php.net php.internals:57937
Mailing-List: contact internals-help@lists.php.net; run by ezmlm
Received-SPF: pass (pb1.pair.com: domain googlemail.com designates 209.85.214.42 as permitted sender)
Received-SPF: pass (google.com: domain of krebs.seb@googlemail.com designates 10.205.132.1 as permitted sender) client-ip=10.205.132.1;
MIME-Version: 1.0
Sender: sebastian.krebs.berlin@googlemail.com
In-Reply-To: <CAO8n+WJrqUguS4FSq==z9rF6iLoz3uXqSLBrrkY6yMBY9DrTWA@mail.gmail.com>
References: <CAG=uTXFQUY=EDb=ut97nNSm+m8sMQNRK-9YPcfb2quaoS246-g@mail.gmail.com>
	<CABBJUpd7XkDjckY-5=D6B=kouUYMrWvzMVnHR_Hch74oGWM-TQ@mail.gmail.com>
	<CAO8n+WJrqUguS4FSq==z9rF6iLoz3uXqSLBrrkY6yMBY9DrTWA@mail.gmail.com>
Date: Wed, 22 Feb 2012 09:37:21 +0100
Message-ID: <CALtuQzD6f_vcZiGi2HWdP8SSqf9744FucUC+4sX7PnGhOnh+rg@mail.gmail.com>
To: internals@lists.php.net
Content-Type: multipart/alternative; boundary=000e0ce038569cfc1d04b9896f44
Subject: Re: [PHP-DEV] [RFC] Enum proposal (yet another)
From: krebs.seb@googlemail.com (Sebastian Krebs)

--000e0ce038569cfc1d04b9896f44
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable

2012/2/22 Charlie Somerville <charlie@charliesomerville.com>

> Right, but enums could possibly be a lot richer than class constants are
> now.
>
> They could be a type where the only values are what's defined in the enum=
.
> This could be used with type hinting:
>
>    enum Foo {
>        A,
>        B,
>        C
>    }
>
>    function bar(Foo $x) {
>        // ...
>    }
>


class MyEnum {
    const FOO =3D 'foo';
    const BAR =3D 'bar';
    private $value;
    public function __construct ($value) {
        if (!in_array($value, array(self::FOO, self::BAR)) throw new
UnexpectedValueException;
        $this->value =3D $value;
    }
    public function __toString () { return $this->value; }
}


function doSomething (MyEnum $foo) { /* code */ }


What I wanted to say: I don't see, what is not possible already?



>
> There'd be no need to do any manual checking that $x is a valid value.
>
> Perhaps enum values could also be casted back to strings:
>
>    (string)Foo::B; // "B"
>
> Sure, this is the kind of stuff that's possible in other ways already, bu=
t
> first class support always helps.
> On Feb 22, 2012 4:14 PM, "Laruence" <laruence@php.net> wrote:
>
> > On Wed, Feb 22, 2012 at 12:45 PM, Samuel Deal <samuel.deal@gmail.com>
> > wrote:
> > > Hi all,
> > >
> > > I really missed enums in PHP,
> > Why? we have class constant.
> >
> > thanks
> > > So after reading I tryed to synthetise the various views.
> > >
> > > You can find a draft here :
> > > https://github.com/SamNrique/php-src/wiki/RFC-draft
> > > (I can't write on the wiki, and perhaps it's better to finish the
> > > discussion first)
> > >
> > > There's an implementation with this draft.
> > > I'd love to have feedbacks because it's my first php-core hack.
> > >
> > > Thanks
> > > --
> > > Samuel D=E9al
> > > samuel.deal@gmail.com
> >
> >
> >
> > --
> > Laruence  Xinchen Hui
> > http://www.laruence.com/
> >
> > --
> > PHP Internals - PHP Runtime Development Mailing List
> > To unsubscribe, visit: http://www.php.net/unsub.php
> >
> >
>

--000e0ce038569cfc1d04b9896f44--