|  | // 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. | 
|  | // Dart test to verify incompatible constructor types | 
|  |  | 
|  | // @dart = 2.9 | 
|  |  | 
|  | abstract class Point { | 
|  | factory Point(int x, int y) = PointImplementation; //# 01: ok | 
|  | factory Point(x, y) = PointImplementation; //# 02: compile-time error | 
|  | } | 
|  |  | 
|  | class PointImplementation implements Point { | 
|  | PointImplementation(int x, int y) {} | 
|  | } | 
|  |  | 
|  | main() { | 
|  | new Point(1, 2); //# 01: continued | 
|  | new Point(1, 2); //# 02: continued | 
|  | } |