hphp/hack/test/typecheck/equal1.php

   1 <?hh // strict
   2 /**
   3  * Copyright (c) 2014, Facebook, Inc.
   4  * All rights reserved.
   5  *
   6  * This source code is licensed under the MIT license found in the
   7  * LICENSE file in the "hack" directory of this source tree.
   8  *
   9  *
  10  */
  11
  12 interface I {}
  13
  14 class A implements I {}
  15 class B implements I {}
  16
  17 function createFromMeta(): ?I {
  18
  19   $result = null;
  20   switch (0) {
  21   case 0:
  22     $result = new A();
  23     break;
  24   case 1:
  25     $result = new B();
  26     break;
  27   default:
  28     $result = null;
  29     break;
  30   }
  31
  32   if ($result === null) {
  33     throw new Exception('Cannot create corrector %d.');
  34   }
  35   return $result;
  36 }
  37
  38