/*
 * Copyright (c) 2017-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

struct S {
  int field;
};

void ref_set_to_zero(int& x) { x = 0; }

void struct_ref_set_to_zero(struct S& s) { s.field = 0; }

void call_by_ref_good() {
  int arr[10];
  int i = 99;
  ref_set_to_zero(i);
  arr[i] = 123;
}

void call_by_ref_bad() {
  int arr[10];
  int i = 5;
  ref_set_to_zero(i);
  arr[i - 1] = 123;
}