hphp/hack/test/typecheck/printf7.php

   1 <?hh
   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 MyPlainSprintf {
  13   public function format_s(mixed $s): string;
  14 }
  15
  16 function my_sprintf(FormatString<MyPlainSprintf> $f, ...): string {
  17   return 'hi';
  18 }
  19
  20 function f() {
  21   my_sprintf('%s', 'hi');
  22   my_sprintf("%s", 'hi');
  23 }