|  | // Copyright (c) 2021, 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. | 
|  |  | 
|  | extension S on int { | 
|  | void test(int x) {} | 
|  | } | 
|  |  | 
|  | extension S2<X> on int { | 
|  | void test2(int x) {} | 
|  | void test3<Y>(Y y) {} | 
|  | } | 
|  |  | 
|  | foo() { | 
|  | 3.test(); | 
|  | 4.test(5, 6); | 
|  | 5.test<int>(6); | 
|  |  | 
|  | 3.test2(); | 
|  | 4.test2(5, 6); | 
|  | 5.test2<int>(6); | 
|  |  | 
|  | 3.test3(); | 
|  | 4.test3(5, 6); | 
|  | 5.test3<int>(6); | 
|  | 6.test3<int, int>(7); | 
|  | 7.test3<int, int, int>(8); | 
|  |  | 
|  | S(3).test(); | 
|  | S(4).test(5, 6); | 
|  | S(5).test<int>(6); | 
|  |  | 
|  | S2(3).test2(); | 
|  | S2(4).test2(5, 6); | 
|  | S2(5).test2<int>(6); | 
|  |  | 
|  | S2(3).test3(); | 
|  | S2(4).test3(5, 6); | 
|  | S2(5).test3<int>(6); | 
|  | S2(6).test3<int, int>(7); | 
|  | S2(7).test3<int, int, int>(8); | 
|  | } | 
|  |  | 
|  | main() {} |