| // Copyright (c) 2014, 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'; |
| |
| f() {} |
| const g = 1; |
| |
| const identical_ff = identical(f, f); |
| const identical_fg = identical(f, g); |
| const identical_gf = identical(g, f); |
| const identical_gg = identical(g, g); |
| |
| // Verify proper compile time computation of identical() |
| const a = const { |
| identical_ff: 0, //# 01: compile-time error |
| identical_gg: 0, //# 02: compile-time error |
| true: 0 |
| }; |
| |
| const b = const { |
| identical_fg: 0, //# 03: compile-time error |
| identical_gf: 0, //# 04: compile-time error |
| false: 0 |
| }; |
| |
| use(x) => x; |
| |
| main() { |
| use(a); |
| use(b); |
| |
| // Verify proper run time computation of identical() |
| Expect.isTrue(identical_ff); //# 05: ok |
| Expect.isTrue(identical_gg); //# 06: ok |
| Expect.isFalse(identical_fg); //# 07: ok |
| Expect.isFalse(identical_gf); //# 08: ok |
| } |