[RFC] Mixed Typehint

Hello internals, I'd like to propose and discuss Mixed Typehint RFC for PHP 7.3: https://wiki.php.net/rfc/mixed-typehint The purpose of this RFC is to introduce "mixed" typehint on language level to be used as a valid typehint. PHP currently forces users to not use any type in case the type is mixed/unclear. This makes code inconsistent and less explicit. With mixed, it should be easy to eliminate this inconsistency and achieve fully type hinted code. It's a simple alias for the current behavior of no type and is fully interchangeable. This is mostly cosmetic change, no BC break to user-land is involved. This RFC comes with a rather simple PR: https://github.com/php/php-src/pull/2603 Please let me know what you think or if you find anything unclear. Thanks! Michael Moravec