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Date: Sat, 23 Nov 2024 23:13:58 +0100
Message-ID: <CAPyj-LAhHyeyYtvyeA5MxQL3JYf_Uk4zvkSDHvyxLaHdega26Q@mail.gmail.com>
Subject: Re: [PHP-DEV] [RFC] Data Classes
To: PHP internals <internals@lists.php.net>
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From: tovilo.ilija@gmail.com (Ilija Tovilo)

On Sat, Nov 23, 2024 at 11:10=E2=80=AFPM Ilija Tovilo <tovilo.ilija@gmail.c=
om> wrote:
>
> On Sat, Nov 23, 2024 at 2:12=E2=80=AFPM Rob Landers <rob@bottled.codes> w=
rote:
> >
> > Born from the Records RFC (https://wiki.php.net/rfc/records) discussion=
, I would like to introduce to you a competing RFC: Data Classes (https://w=
iki.php.net/rfc/dataclass).
>
> But this is not the point I was trying to make either. Rather, when it
> comes to immutable, growable data structures, every mutation becomes
> an extremely expensive operation because the entire data structure,
> including its underlying storage, needs to be copied. For example:
>
> https://3v4l.org/BEsYT

Oops, appendImmutable() should of course have modified $new and
returned it. https://3v4l.org/IkSY1

But you get the point.