Newsgroups: php.internals
Path: news.php.net
Xref: news.php.net php.internals:118103
Message-ID: <f115ec64-0a66-7f2c-bd38-e5fb74015ca8@gmail.com>
Date: Mon, 27 Jun 2022 09:16:16 +0100
MIME-Version: 1.0
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:91.0) Gecko/20100101
 Thunderbird/91.10.0
Content-Language: en-GB
To: internals@lists.php.net
References: <CAPyj-LBQmoFEGZyMw3H5fAy-NwP3WdkH2ZviHWcBrhJ_8qrOGg@mail.gmail.com>
 <bb40be07-c3fc-4ca9-9365-37a50b8339cd@www.fastmail.com>
 <CAOWwgpmQC8ptMCn7JwV31nAzA3v76ERxM-XDi-+RQnfezAO1=g@mail.gmail.com>
 <6a016333-2be0-4865-b263-29611ecb4c62@www.fastmail.com>
 <78f26b4d-6f3e-f5e0-3ad5-3a2378ee7030@mabe.berlin>
In-Reply-To: <78f26b4d-6f3e-f5e0-3ad5-3a2378ee7030@mabe.berlin>
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 8bit
Subject: Re: [PHP-DEV] [RFC][Under discussion] Fetch properties in const
 expressions
From: rowan.collins@gmail.com (Rowan Tommins)

On 27/06/2022 08:38, Marc Bennewitz wrote:
> Now as I have a lot of such classes and I want to make sure all of the 
> prefixes are unique so I added an enum with all prefixes and use the 
> enum value as constant value as well.
>
> enum IdPrefix:string
> {
>     case USER_ID = 'u-';
>     // ...
> } 


This would never have occurred to me as a design, because I had no idea 
that the values of backed enums were enforced to be unique. I'm not sure 
if it can be considered "taking advantage of a side-effect", or if 
people always expected backed enums to be used that way.

Ultimately, that's my reaction to both the enum-related RFC currently 
under discussion: I don't really understand what backed enums are 
intended for in the first place, so find it hard to judge whether 
expanding them in a particular way makes sense. If a string-backed enum 
can be considered just a unique set of strings, then it really has very 
little in common with how I think of (unbacked) enums, but maybe that's 
fine.

Regards,

-- 
Rowan Tommins
[IMSoP]