[RFC] Partial Function Application v2

Hi folks. Arnaud and I would like to present take-2 at Partial Function Application. https://wiki.php.net/rfc/partial_function_application_v2 It is largely similar to the previous PFA proposal from 2021, though there are a number of changes. Most notably: * The implementation is simpler, because FCC already did part of the work. This RFC can build on it. * Constructors are not supported. * But optional arguments and named placeholders are supported. * It includes pipe-based optimizations. Note: We realize that this is a non-trivial RFC coming late in the cycle. We are proposing it now because, well, it's ready now. If the discussion goes smoothly, we're OK calling a vote on it for 8.5, especially as it would complement pipes so well. If the discussion runs longer, we're also OK with targeting 8.6 instead. We'll see how that goes. <floor opens for discussion, Larry falls through the trap door> -- Larry Garfield larry@garfieldtech.com