| /* |
| * 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 A conditional expression c of the form e1 ? e2 : e3. |
| * If all of the following hold: |
| * - e1 shows that a variable v has type T. |
| * - v is not potentially mutated in e2 or within a closure. |
| * - If the variable v is accessed by a closure in e2 then the variable v is |
| * not potentially mutated anywhere in the scope of v . |
| * then the type of v is known to be T in e2 . |
| * @description Checks that if e1 does not show that v has any type T, then the |
| * type of v is not known to be any promoted type in e2. |
| * @static-warning |
| * @author ilya |
| */ |
| |
| class C {} |
| class D extends C { |
| f() {} |
| } |
| class E extends C { |
| f() {} |
| } |
| |
| f(C x) { |
| (x is D || x is E) ? x.f() : null; |
| } |
| |
| main() { |
| f(new D()); |
| } |
