| /* |
| * 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 T is dynamic, is-expression does not show that |
| * v has type dynamic. Formal parameter case. |
| * @static-warning |
| * @author ilya |
| */ |
| import "../../Utils/expect.dart"; |
| |
| class C {} |
| |
| f(C x) { |
| x is dynamic ? x.unknown() : null; // static warning, would be no warning |
| // if x was known to have type dynamic |
| } |
| |
| main() { |
| Expect.throws(() => f(new C())); |
| } |
