Re: [RFC] [Discussion] Bound-Erased Generic Types

On Sun, 10 May 2026 at 21:04, Seifeddine Gmati <azjezz@carthage.software> wrote: > Hello Internals, > > I'd like to start the discussion on a new RFC adding bound-erased > generics types to PHP. > > Generic type parameters can be declared on classes, interfaces, > traits, functions, methods, closures, and arrow functions, with > bounds, defaults, and variance markers. Type parameters erase to their > bound at runtime; the pre-erasure form is preserved for Reflection and > consumed by static analyzers. > > - RFC: https://wiki.php.net/rfc/bound_erased_generic_types > - Implementation: https://github.com/php/php-src/pull/21969 > > Thanks, > Seifeddine. > Seifeddine, Many thanks for such a detailed and interesting proposal. A couple of suggestions for the RFC: - It would be great to have some mention of the performance cost of this feature, both for code which does not use generics and for code that does use them - It would be great to be able to see how the userland samples from Laravel, Doctrine, etc... would look when using this new syntax, maybe you could add a new section with this Cheers Carlos