hphp/hack/test/typecheck/functional_dots4.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 class A {}
  13 class B extends A {}
  14
  15 function f((function(B, ...): string) $g): string {
  16   return $g(new B());
  17 }
  18
  19 function test(): void {
  20   f(
  21     function(A $x, ...): string {
  22       return "...";
  23     },
  24   );
  25 }