1/* 2 * Copyright (c) 2024-2025 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 gf(x: String, fn: (x: String = /* @@ label */"TEST") => Int): Int { 17 return fn(x) 18} 19 20function main(): void { 21 gf("abc" as String, (x: String): Int => { return x=="TEST"?0:1}) 22} 23 24/* @@@ label Error SyntaxError: Default value is allowed only for optional parameters. */ 25/* @@? 21:24 Error TypeError: Type '(x: String) => Int' is not compatible with type '(x: String|undefined) => Int' at index 2 */ 26