| // Copyright (c) 2023, 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. |
| |
| test(dynamic x) { |
| void Function() setToOne = () {}; |
| switch (x) { |
| case [int y, _] when () { setToOne = () { y = 1; }; return true; }(): |
| case [_, int y] when () { setToOne = () { y = 1; }; return true; }(): |
| setToOne(); |
| return y; |
| case [double y] when () { setToOne = () { y = 1.0; }; return true; }(): |
| setToOne(); |
| return y; |
| default: |
| return null; |
| } |
| } |
| |
| main() { |
| expectEquals(test([0, "foo"]), 0); |
| expectEquals(test(["foo", 0]), 0); |
| expectEquals(test([3.14]), 1.0); |
| expectEquals(test(null), null); |
| } |
| |
| expectEquals(x, y) { |
| if (x != y) { |
| throw "Expected ${x} to be equal to ${y}."; |
| } |
| } |