Re: [RFC][POLL] Switch expression

Hi internals After Levis email yesterday we discussed his suggestions in private. I did some investigation and did find a way to reuse the current switch syntax. The main problem of the ambiguity was the empty switch statement vs expression: ``` // Could be a switch expression or a switch statement with an empty statement (;) switch ($x) {}; ``` Disallowing the switch expression to be empty solves the ambiguity. ``` // This code throws a parser error $x = switch ($y) {}; ``` It's not optimal but everything else will require significant changes in the grammar and have other downsides. I updated the RFC accordingly. Ilija