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Date: Sun, 8 Aug 2021 21:06:15 -0700
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To: Rowan Tommins <rowan.collins@gmail.com>
Cc: PHP internals <internals@lists.php.net>
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Subject: Re: [PHP-DEV] Revisiting Userland Operator Overloads
From: jordan.ledoux@gmail.com (Jordan LeDoux)

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On Sun, Aug 8, 2021 at 9:52 AM Rowan Tommins <rowan.collins@gmail.com>
wrote:

>
> Yes, and as I demonstrated, there are situations where some of the
> operators are only meaningful for a subset of operands. Saying that a
> Money object is "Multipliable" would also be "a lie", since multiplying
> two Money objects together is a logic error, even though multiplying
> Money by a unit-less number is very useful.
>
>
This is a good point, and your example of currency was a great example of a
whole class of other things that would benefit: unit based values.

I've started to work on the RFC document to collect some of the information
we've discussed in this thread. I do not have the ability to edit
wiki.php.net, so I cannot put the RFC on there at the moment. In lieu of
that, I've created a placeholder markdown document on github for the RFC
page:

https://github.com/JordanRL/operator-overloading-rfc/

This is not where I will work on the implementation (which will obviously
be on a fork of php-src). I've outlined my rough idea of the implementation
I'm leaning towards in this doc, but have left out any discussion about
interfaces for now, as I feel that's something that could use further
discussion. Any feedback would be appreciated at this early stage.

Jordan

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