|  | // 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"; | 
|  |  | 
|  | oneOptionalArgument(a, {b}) { | 
|  | Expect.equals(1, a); | 
|  | Expect.equals(2, b); | 
|  | } | 
|  |  | 
|  | twoOptionalArguments({a, b}) { | 
|  | Expect.equals(1, a); | 
|  | Expect.equals(2, b); | 
|  | } | 
|  |  | 
|  | main() { | 
|  | twoOptionalArguments(a: 1, b: 2); | 
|  | twoOptionalArguments(b: 2, a: 1); | 
|  |  | 
|  | oneOptionalArgument(1, b: 2); | 
|  |  | 
|  | new A.twoOptionalArguments(a: 1, b: 2); | 
|  | new A.twoOptionalArguments(b: 2, a: 1); | 
|  |  | 
|  | new A.oneOptionalArgument(1, b: 2); | 
|  |  | 
|  | new B.one(); | 
|  | new B.two(); | 
|  | new B.three(); | 
|  |  | 
|  | new B().B_one(); | 
|  | new B().B_two(); | 
|  | new B().B_three(); | 
|  | } | 
|  |  | 
|  | class A { | 
|  | A.oneOptionalArgument(a, {b}) { | 
|  | Expect.equals(1, a); | 
|  | Expect.equals(2, b); | 
|  | } | 
|  |  | 
|  | A.twoOptionalArguments({a, b}) { | 
|  | Expect.equals(1, a); | 
|  | Expect.equals(2, b); | 
|  | } | 
|  |  | 
|  | A(); | 
|  |  | 
|  | // A named constructor now conflicts with a method of the same name. | 
|  | oneOptArg(a, {b}) { | 
|  | Expect.equals(1, a); | 
|  | Expect.equals(2, b); | 
|  | } | 
|  |  | 
|  | twoOptArgs({a, b}) { | 
|  | Expect.equals(1, a); | 
|  | Expect.equals(2, b); | 
|  | } | 
|  | } | 
|  |  | 
|  | class B extends A { | 
|  | B.one() : super.twoOptionalArguments(a: 1, b: 2); | 
|  | B.two() : super.twoOptionalArguments(b: 2, a: 1); | 
|  | B.three() : super.oneOptionalArgument(1, b: 2); | 
|  |  | 
|  | B(); | 
|  | B_one() { | 
|  | super.twoOptArgs(a: 1, b: 2); | 
|  | } | 
|  |  | 
|  | B_two() { | 
|  | super.twoOptArgs(b: 2, a: 1); | 
|  | } | 
|  |  | 
|  | B_three() { | 
|  | super.oneOptArg(1, b: 2); | 
|  | } | 
|  | } |