1/* 2 * Copyright (c) 2023-2025 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 A<T>{} 17 18let g:((y:A<int>) => A<int>|null)|null = /* @@ label */(y:A<String>): A<String>|null => { 19 return y; 20} 21 22/* @@@ label Error TypeError: Type '(y: A<String>) => A<String>|null' cannot be assigned to type '(y: A<Int>) => A<Int>|null|null' */ 23