hphp/hack/test/typecheck/test_qmc.php

   1 <?hh
   2 /**
   3  * Copyright (c) 2014, Facebook, Inc.
   4  * All rights reserved.
   5  *
   6  * This source code is licensed under the BSD-style license found in the
   7  * LICENSE file in the "hack" directory of this source tree. An additional grant
   8  * of patent rights can be found in the PATENTS file in the same directory.
   9  *
  10  */
  11
  12 class Foo {
  13
  14   private ?int $optional_param = null;
  15   private int $required_param = 0;
  16
  17   public function test(): ?int {
  18
  19     $foo = $this->optional_param ?: $this->required_param;
  20     return $foo;
  21   }
  22 }