hphp/hack/test/typecheck/trait_abstract_function.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 trait A {
  13   public abstract function f1(): void;
  14 }
  15
  16 class B {
  17   use A;
  18 }