Language/Expressions/Type_Test/definition_t06.dart

/*
 * Copyright (c) 2011, 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 Let v be a local variable or a formal parameter. An is-expression
 * of the form v is T shows that v has type T iff T is more specific than the
 * type S of the expression v and both T != dynamic and S != dynamic.
 * @description Checks that if v is an instance variable, is-expression does
 * not show that v has type T.
 * @author ilya
 */
import '../../../Utils/expect.dart';

class C {}

class D extends C {
  f() {}
}

class S {
  C x;
  test() {
    Expect.isFalse(x is D);
  }
}

main() {
  new S().test();
}