1/*
2 * Copyright (c) 2024 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 X {}
17class Y extends X {}
18
19abstract class A {
20    foo(x: Y): string { return "A.foo(Y)" }
21    abstract foo(x: Double): String
22    foo2(x: Y): Object { return "A.foo(Y)" }
23}
24
25class B extends A {
26    foo(x: X): string { return "B.foo(X)" }
27    foo(x: Floating): String { return "B.foo(Floating)" }
28}
29
30class C extends A {
31    foo(x: Double): String { return "C.foo(Double)" }
32    override foo2(x: Y): String { return "C.foo2(Y)" }
33}
34
35function main() {
36    assert(new B().foo(new Y()) == "B.foo(X)");
37    assert(new B().foo(new Double()) == "B.foo(Floating)");
38    assert(new C().foo2(new Y()) == "C.foo2(Y)")
39}