| // 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 for statement of the form for (finalConstVarOrType? id in e) s |
| /// is equivalent to the following code: |
| /// var n0 = e.iterator; |
| /// while (n0.moveNext()) { |
| /// finalConstVarOrType? id = n0.current; |
| /// s |
| /// } |
| /// where n0 is an identifier that does not occur anywhere in the program, except |
| /// that for purposes of static typechecking, it is checked under the assumption |
| /// that n0 is declared to be of type T, where T is the static type of e.iterator. |
| /// @description Checks that s is not evaluated if e is empty. |
| /// @author vasya |
| |
| import '../../../../Utils/expect.dart'; |
| |
| void check(var e) { |
| var b = false; |
| for (var id in e) { |
| b = true; |
| } |
| Expect.isFalse(b); |
| } |
| |
| main() { |
| check([]); |
| check(new Set()); |
| } |