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 foo(a: int, op?: int): int { return a } 18} 19class A extends B { 20 override foo(a: int, op?: int): int { return a } 21} 22 23class C<T> { 24 foo(a: T, op?: T): T { return a } 25} 26class D<T> extends C<T> { 27 override foo(a: T, op?: T): T { return a } 28} 29 30function main(){ 31 let a = new A(); 32 let b = new B(); 33 let c = new C<string>(); 34 let d = new D<string>(); 35 36 assertEQ(b.foo(5), a.foo(5)) 37 assertNE(b.foo(6), a.foo(5)) 38 assertNE(b.foo(5), a.foo(6)) 39 assertEQ(c.foo("x"), d.foo("x")) 40 assertNE(c.foo("x"), d.foo("y")) 41 assertNE(c.foo("y"), d.foo("x")) 42} 43