|  | // Copyright (c) 2012, 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. | 
|  |  | 
|  | import "package:expect/expect.dart"; | 
|  |  | 
|  | class A { | 
|  | final x; | 
|  | const A(this.x); | 
|  | const A.named([this.x]); | 
|  | const A.named2([this.x = 2]); | 
|  | } | 
|  |  | 
|  | const a1 = const A(0); | 
|  | const a2 = const A.named(); | 
|  | const a3 = const A.named(1); | 
|  | const a4 = const A.named2(); | 
|  | const a5 = const A.named2(3); | 
|  |  | 
|  | main() { | 
|  | Expect.equals(0, a1.x); | 
|  | Expect.equals(null, a2.x); | 
|  | Expect.equals(1, a3.x); | 
|  | Expect.equals(2, a4.x); | 
|  | Expect.equals(3, a5.x); | 
|  | } |