/*
 * Copyright (c) 2019, the Dart project authors.  Please see the AUTHORS file
 * for details. All rights reserved. Use of this source code is governed by a
 * BSD-style license that can be found in the LICENSE file.
 */
/**
 * @assertion An expression of the form e! evaluates e to a value v, throws a
 * runtime error if v is null, and otherwise evaluates to v.
 *
 * @description Check that an expression of the form e! evaluates e to a value
 * v, throws no runtime error if v is not null. Test (true)
 * @author sgrekhov@unipro.ru
 * @issue 39723
 */
// SharedOptions=--enable-experiment=non-nullable
// Requirements=nnbd-strong

main() {
  true!;                //# 01: static type warning
  true!.toString();     //# 02: static type warning
  true!?.toString();    //# 03: static type warning
  true.toString()!;     //# 04: static type warning
}