| // 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. |
| |
| // @dart = 2.9 |
| |
| import "package:expect/expect.dart"; |
| |
| // Tests for closures sharing mutable bindings. |
| |
| var f; |
| var g; |
| |
| setupPlain() { |
| int j = 1000; |
| // Two closures sharing variable 'j'; j initially is 1000. |
| f = (int x) { |
| var q = j; |
| j = x; |
| return q; |
| }; |
| g = (int x) { |
| var q = j; |
| j = x; |
| return q; |
| }; |
| } |
| |
| setupLoop() { |
| for (int i = 0; i < 2; i++) { |
| int j = i * 1000; // The last stored closure has j initially 1000. |
| // Two closures sharing variable 'j'. |
| f = (int x) { |
| var q = j; |
| j = x; |
| return q; |
| }; |
| g = (int x) { |
| var q = j; |
| j = x; |
| return q; |
| }; |
| } |
| } |
| |
| setupNestedLoop() { |
| for (int outer = 0; outer < 2; outer++) { |
| int j = outer * 1000; |
| for (int i = 0; i < 2; i++) { |
| // Two closures sharing variable 'j' in a loop at different nesting. |
| f = (int x) { |
| var q = j; |
| j = x; |
| return q; |
| }; |
| g = (int x) { |
| var q = j; |
| j = x; |
| return q; |
| }; |
| } |
| } |
| } |
| |
| test(setup) { |
| setup(); |
| Expect.equals(1000, f(100)); |
| Expect.equals(100, f(200)); |
| Expect.equals(200, f(300)); |
| Expect.equals(300, g(400)); |
| Expect.equals(400, g(500)); |
| } |
| |
| main() { |
| test(setupPlain); |
| test(setupLoop); |
| test(setupNestedLoop); |
| } |