1/* 2 * Copyright (c) 2024-2025 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 16class B { 17 x: int 18 setX(x:int): this { this.x = x; return this } 19} 20class D extends B { 21 y: int 22 setY(y:int): this { this.y = y; return this } 23} 24function rotate(this: B): this { return this } 25 26new D().setX(3).rotate().setY(33); 27assertTrue(true) 28let d = new D(); 29d.setX(3).rotate().setY(33); 30assertEQ(d.x, 3) 31assertEQ(d.y, 33) 32