1/* 2 * Copyright (c) 2022-2024 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 16enum Commands { Open = "fopen", Close = "fclose" } 17let c: Commands = Commands.Close 18let o: Object = c // Autoboxing of enum type to its reference version 19// Such reference version type has no name, but can be detected by instanceof 20if (o instanceof Commands) { 21 let d = o as Commands // And explicitly converted back by 'as' conversion 22 assert(d == Commands.Close) 23} 24 25let u : Object | Commands = Commands.Close; 26if (u instanceof Commands) 27{ 28 let d = o as Commands; 29 assert(d == Commands.Close) 30} 31