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/typeRelationships/recursiveTypes/recursiveTypeInGenericConstraint.ts === 20declare function AssertType(value:any, type:string):void; 21class G<T> { 22 x: G<G<T>>; // infinitely expanding type reference 23} 24 25class Foo<T extends G<T>> { // error, constraint referencing itself 26 bar: T; 27} 28 29class D<T> { 30 x: G<G<T>>; 31} 32 33let c1 = new Foo<D<string>>(); // ok, circularity in assignment compat check causes success 34AssertType(c1, "Foo<D<string>>"); 35AssertType(new Foo<D<string>>(), "Foo<D<string>>"); 36AssertType(Foo, "typeof Foo"); 37 38 39