hphp/hack/test/typecheck/case_null.php

   1 <?hh // strict
   2 // Copyright 2004-present Facebook. All Rights Reserved.
   3
   4 enum Enum: int {
   5   A = 0;
   6   B = 1;
   7   C = 2;
   8   D = 3;
   9 }
  10
  11 function f(Enum $e): int {
  12   $x = null;
  13   switch ($e) {
  14     case Enum::A:
  15       $x = 1;
  16       break;
  17     case Enum::B:
  18     case Enum::C:
  19       $x = 2;
  20       break;
  21     case Enum::D:
  22       return 3;
  23   }
  24   return $x;
  25 }