hphp/hack/test/typecheck/gen_trait1.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 trait MyTrait<T> {
  13   protected Vector<T> $a;
  14   public function test(): T {
  15     return $this->a[0];
  16   }
  17 }
  18
  19 class A {
  20   use MyTrait<int>;
  21
  22   public function __construct(int $x) {
  23     $this->a = Vector { $x };
  24   }
  25 }