hphp/hack/test/typecheck/constraint_gen_fail2.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 interface A {
  13   public function render(): string;
  14 }
  15
  16 function foo<T as A>(T $x): void {
  17   $x->render();
  18 }
  19
  20 function test(): void {
  21   foo('test');
  22 }