1/* 2* Copyright (c) 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 16function erase<T>(v: T): Any { return v } 17 18assertTrue(erase((() => { 19 let r: boolean | undefined; 20 return r; 21})()) === undefined) 22 23assertTrue(erase((() => { 24 let r: boolean | null | undefined; 25 return r; 26})()) === undefined) 27