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 16class C<out T> { 17 readonly fld: T 18 constructor(p: T) { 19 this.fld = p 20 } 21} 22 23type NestedC = String | C<NestedC> | Error 24 25function main(): int { 26 let x: NestedC = new C<C<Error>>(new C<Error>(new Error())) 27 let ok = x instanceof C && x.fld instanceof C && x.fld.fld instanceof Error 28 return ok ? 0 : 1 29} 30