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Date: Sat, 24 Apr 2021 21:55:16 +0200
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To: Marco Pivetta <ocramius@gmail.com>
Cc: Saif Eddin Gmati <azjezz@void.tn>, Pierre <pierre-php@processus.org>, 
	Saif Eddin Gmati <azjezz@protonmail.com>, PHP Internals <internals@lists.php.net>
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Subject: Re: [PHP-DEV] [RFC][Draft] Sealed Classes
From: olleharstedt@gmail.com (=?UTF-8?Q?Olle_H=C3=A4rstedt?=)

2021-04-24 21:51 GMT+02:00, Marco Pivetta <ocramius@gmail.com>:
> On Sat, Apr 24, 2021, 21:44 Olle H=C3=A4rstedt <olleharstedt@gmail.com> w=
rote:
>
>> 2021-04-24 17:59 GMT+02:00, Saif Eddin Gmati <azjezz@void.tn>:
>> >> Doesn't this violate the principle: It should be possible to add new
>> >> features without touching old code?
>> >
>> > This depends on which syntax is picked, both `for` and attribute synta=
x
>> will
>> > be completely BC.
>>
>> I'm not talking about BC, but the maintainability of the new feature
>> itself. For the shape example, you'd need to edit the original file
>> for each new shape you add, which is detrimental for maintainability
>> and scalability. So what's a good use-case?
>>
>
> The main use-case of sealed types is being able to declare total function=
s
> around them.

What is "total function" in your discourse? :) Can you find a more
concrete example? Preferably one that's relevant for web site/app
development. Shapes is a bit too generic, I think.

Olle