Re: [RFC] Primary Constructors

On Mon, Jun 29, 2026, at 12:27, Lynn wrote: > > > On Mon, Jun 29, 2026 at 2:20 AM Rob Landers <rob@getswytch.com> wrote: >> __ >> Hello internals, >> >> I'd like to put forward Primary Constructors >> <https://wiki.php.net/rfc/primary-constructors> for comment. >> >> An implementation PR will be opened later today (UTC), and the RFC updated with this >> discussion thread. >> >> — Rob > > I don't see any mention of anonymous classes, I assume they aren't compatible syntax > wise? Hi Lynn, That's a good observation! Originally, I had a whole section and decided to strip it, then forgot to add it back as non-supported and future scope. FWIW, I was originally going to support them with something like: $arg = 'foo'; $class = new class(public int $x = $arg) {} Which desugars to: $arg = 'foo'; $class = new class($arg) { public function __construct(public int $x) {} } There are a lot of caveats, which is why I dropped it for future scope: 1. it would require types on the input parameters to disambiguate between arguments and properties 2. it gets weird if you don't specify a default value for the property and makes it ambiguous as a constructor 3. which begs the question of always having a default In essence, it deserves its own RFC because there is a lot of subtlety and only makes sense in the context that primary constructors exist in the first place. I'll address it in the RFC, thanks! — Rob