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Date: Fri, 31 Jan 2020 12:35:04 -0600
In-Reply-To: <58F2F26E-3082-4A32-828C-80491F9ED430@newclarity.net>
Cc: Larry Garfield <larry@garfieldtech.com>,
 php internals <internals@lists.php.net>
To: Mike Schinkel <mike@newclarity.net>
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 <CAF+90c8h8dBhM=12ifxBJsWGcgVkjXHmmvKkPo_xCjUvZ++XdQ@mail.gmail.com>
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 <7c915ed1-adcb-473d-a975-acfdbf7b1e33@www.fastmail.com>
 <58F2F26E-3082-4A32-828C-80491F9ED430@newclarity.net>
Subject: Re: [PHP-DEV] Operator overloading for userspace objects
From: ben@benramsey.com (Ben Ramsey)

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> If we still want operator overloading and we want to force operator =
overloading to require immutability, I believe that means we would need =
an immutability RFC to be approved (and implemented?) before operator =
overloading requiring immutability could be approved.  Something like =
this:


For reference, immutability has been proposed in the past, but I=E2=80=99m=
 not sure where it landed. It looks like it fizzled out.

* https://wiki.php.net/rfc/immutability
* https://externals.io/message/94913
* https://externals.io/message/96919
* https://externals.io/message/97355
* https://externals.io/message/101890
* https://externals.io/message/81426

I agree with you that I think we need to accept an immutability RFC =
before operator overloading (requiring immutability) can be approved.

I also believe operator overloading should require immutability.

Cheers,
Ben


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