hphp/hack/test/typecheck/method_dispatch_37.php

   1 <?hh // strict
   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 /**
  13  * Hack treats method dispatch in a different way from PHP.
  14  */
  15
  16 class A {
  17   public function f1(): void {}
  18   public static function f2(): void {}
  19 }
  20
  21 class B extends A {
  22   public function f1(): void {}
  23   public static function f2(): void {}
  24   public function test1(A $x): void {
  25     // UNSAFE
  26     $x::f1();
  27   }
  28   public static function test2(): void {}
  29 }
  30
  31 class C {
  32   public function f3(): void {}
  33   public static function f4(): void {}
  34 }