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 16 function identity<A>(a: A): A { 17 return a; 18} 19let x = [1, 2, 3].map(identity)[0]; 20 21/* @@? 19:9 Error TypeError: No matching call signature for map(<A>(a: A) => A) */ 22/* @@? 19:9 Error TypeError: Indexed access is not supported for such expression type. */ 23/* @@? 19:9 Error TypeError: No matching call signature for map(<A>(a: A) => A) */ 24/* @@? 19:9 Error TypeError: Indexed access is not supported for such expression type. */ 25/* @@? 19:23 Error TypeError: Type '<A>(a: A) => A' is not compatible with type '(value: Int, index: Double, array: Array<Int>) => A' at index 1 */ 26/* @@? 19:23 Error TypeError: Type '<A>(a: A) => A' is not compatible with type '(value: Int, index: Double, array: ReadonlyArray<Int>) => A' at index 1 */ 27/* @@? 19:23 Error TypeError: Type '<A>(a: A) => A' is not compatible with type '(value: Int, index: Double, array: Array<Int>) => A' at index 1 */ 28/* @@? 19:23 Error TypeError: Type '<A>(a: A) => A' is not compatible with type '(value: Int, index: Double, array: ReadonlyArray<Int>) => A' at index 1 */ 29