LanguageFeatures/nnbd/null_check_operator_A01_t03.dart

/*
 * 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 function type
 * @author sgrekhov@unipro.ru
 * @issue 39723
 */
// SharedOptions=--enable-experiment=non-nullable

class A {
  foo() {}
  Object? get getValue => "Lily was here";
  int? operator [](int index) => index;
}

main() {
  A? a = new A();
  a!;
  a!.foo();
  a![42];
  a!?.foo();
  a!?.[42];
  if (a != null) {
    a.getValue!;
    a[42]!;
  }
}