/*
 * Copyright (c) 2024 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

interface ListItem {
    getHead(): this
}

class C {
    n: number = 0

    m(c: this) {
        console.log(c)
    }
}

interface ListItem2 {
    getHead(): ListItem
}

class D {
    n: number = 0

    m(c: D) {
        console.log(c)
    }
}