[RFC] [DISCUSSION] Scalar Pseudo-type

Hi Internals! I prepared a PR to add the scalar pseudo-type to PHP after the discussions around adding a mixed pseudo-type. I strongly believe that it makes sense to provide the most common primitive union types with handy aliases even if we are going to add union types in the future to PHP. https://github.com/php/php-src/pull/2987 I added support for parameter type covariance and return type contravariance to make it as useful in daily development as possible. I will provide the RFC write-up asap at: https://wiki.php.net/rfc/scalar-pseudo-type -- Richard "Fleshgrinder" Fussenegger