1/* 2* Copyright (c) Microsoft Corporation. All rights reserved. 3* Copyright (c) 2023 Huawei Device Co., Ltd. 4* Licensed under the Apache License, Version 2.0 (the "License"); 5* you may not use this file except in compliance with the License. 6* You may obtain a copy of the License at 7* 8* http://www.apache.org/licenses/LICENSE-2.0 9* 10* Unless required by applicable law or agreed to in writing, software 11* distributed under the License is distributed on an "AS IS" BASIS, 12* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13* See the License for the specific language governing permissions and 14* limitations under the License. 15* 16* This file has been modified by Huawei to verify type inference by adding verification statements. 17*/ 18 19// === tests/cases/conformance/types/typeAliases/interfaceDoesNotDependOnBaseTypes.ts === 20declare function AssertType(value:any, type:string):void; 21let x: StringTree; 22AssertType(x, "StringTree"); 23 24if (typeof x !== "string") { 25 x.push(""); 26AssertType(x.push(""), "number"); 27AssertType(x.push, "(...StringTree[]) => number"); 28AssertType("", "string"); 29 30 x.push([""]); 31AssertType(x.push([""]), "number"); 32AssertType(x.push, "(...StringTree[]) => number"); 33AssertType([""], "string[]"); 34AssertType("", "string"); 35} 36 37type StringTree = string | StringTreeArray; 38interface StringTreeArray extends Array<StringTree> { } 39 40