| // Copyright (c) 2018, 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. | 
 |  | 
 | // dart2jsOptions=--strong | 
 |  | 
 | import 'package:expect/expect.dart'; | 
 |  | 
 | abstract class A { | 
 |   m(x); | 
 | } | 
 |  | 
 | class B implements A { | 
 |   noSuchMethod(Invocation i) { | 
 |     print("nsm call: ${i.memberName}"); | 
 |     if (i.isGetter) { | 
 |       throw (" - tearoff"); | 
 |     } | 
 |     if (i.isMethod) { | 
 |       print(" - method invocation"); | 
 |       return 42; | 
 |     } | 
 |     return 123; | 
 |   } | 
 | } | 
 |  | 
 | void main() { | 
 |   A x = new B(); | 
 |   Expect.equals(42, x.m(3)); | 
 | } |