hphp/hack/test/typecheck/constraint_gen_fail1.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 class A {
  13   public function render(): string { return ""; }
  14 }
  15
  16 function foo<T as A>(Vector<T> $x): Vector<T> {
  17   $x[0] = new A();
  18   return $x;
  19 }
  20