1/* 2 * Copyright (c) 2025 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16let count = 1; 17class A { 18 callback_?: Function; 19 on(callback?: Function): void { 20 this.callback_ = callback; 21 this.callback_!.unsafeCall(); 22 } 23} 24 25class B { 26 callback1_?: Function; 27 callback2_?: Function; 28 on(callback1?: Function, callback2?: Function): void { 29 this.callback1_ = callback1; 30 this.callback1_!.unsafeCall(); 31 this.callback2_ = callback2; 32 this.callback2_!.unsafeCall(); 33 } 34} 35 36function main() { 37 let a = new A(); 38 a.on(() => { count = 100 }) 39 assertEQ(count, 100) 40 41 let lambda1 = () => { count = 200 }; 42 a.on(lambda1); 43 assertEQ(count, 200) 44 45 let b = new B(); 46 b.on(() => { count = 300 }, () => { count = 400 }); 47 assertEQ(count, 400) 48} 49