Re: [PHP-DEV] [Pre-RFC] Reified generics

On Thu, Aug 6, 2026, at 11:00, Barel wrote:
> Hi,
> 
> In this RFC https://wiki.php.net/rfc/bound_erased_generic_types Seifeddine Gmati proposed bound-erased generics for PHP. The RFC did not pass mainly because people thought that, if later on reified generics were added on top of this, there would be BC breaks for code that was not type checked and then started to be type checked. To try to avoid this objection, Rob Landers implemented an experimental reified version of generics on top of Seifeddine's proposal.
> 
> There was very little discussion about this proposal because Seifeddine put the RFC to vote very soon after Rob sent it. I think that this was a very valid proposal that should have been explored in more detail. What I have tried to do is to bring this proposal forward and make it complete.
> 
> This is the branch where you can find my implementation (it's based on Rob's branch): https://github.com/carlos-granados/php-src/tree/reify
> 
> I wrote a document about all the changes and the findings: https://github.com/carlos-granados/php-src/blob/reify/docs/source/core/reify.md
> 
> Looking forward to your thoughts, comments and suggestions
> 
> Cheers
> 
> Carlos

Hi Carlos,

You really should have reached out instead of a working in isolation. Join us in discord, the proposal is delayed until September-ish.

— Rob