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/typeAndMemberIdentity/objectTypesIdentityWithCallSignatures.ts === 20declare function AssertType(value:any, type:string):void; 21// object types are identical structurally 22 23class A { 24 foo(x: string): string { 25AssertType(null, "null"); 26return null; 27} 28} 29 30class B { 31 foo(x: string): string { 32AssertType(null, "null"); 33return null; 34} 35} 36 37class C<T> { 38 foo(x: T): T { 39AssertType(null, "null"); 40return null; 41} 42} 43 44interface I { 45 foo(x: string): string; 46} 47 48interface I2<T> { 49 foo(x: T): T; 50} 51 52let a: { foo(x: string): string 53AssertType(a, "{ foo(string): string; }"); 54 55AssertType(foo, "(string) => string"); 56 57AssertType(x, "string"); 58} 59 60let b = { foo(x: string) { 61AssertType(b, "{ foo(string): string; }"); 62AssertType({ foo(x: string) { return ''; } }, "{ foo(string): string; }"); 63AssertType(foo, "(string) => string"); 64AssertType(x, "string"); 65AssertType('', "string"); 66return ''; } }; 67 68function foo1(x: A); 69function foo1(x: A); // error 70function foo1(x: any) { } 71 72function foo1b(x: B); 73function foo1b(x: B); // error 74function foo1b(x: any) { } 75 76function foo1c(x: C<string>); 77function foo1c(x: C<string>); // error 78function foo1c(x: any) { } 79 80function foo2(x: I); 81function foo2(x: I); // error 82function foo2(x: any) { } 83 84function foo3(x: typeof a); 85function foo3(x: typeof a); // error 86function foo3(x: any) { } 87 88function foo4(x: typeof b); 89function foo4(x: typeof b); // error 90function foo4(x: any) { } 91 92function foo5(x: A); 93function foo5(x: B); // error 94function foo5(x: any) { } 95 96function foo5b(x: A); 97function foo5b(x: C<string>); // error 98function foo5b(x: any) { } 99 100function foo6(x: A); 101function foo6(x: I); // error 102function foo6(x: any) { } 103 104function foo7(x: A); 105function foo7(x: typeof a); // error 106function foo7(x: any) { } 107 108function foo8(x: B); 109function foo8(x: I); // error 110function foo8(x: any) { } 111 112function foo9(x: B); 113function foo9(x: C<string>); // error 114function foo9(x: any) { } 115 116function foo10(x: B); 117function foo10(x: typeof a); // error 118function foo10(x: any) { } 119 120function foo11(x: B); 121function foo11(x: typeof b); // error 122function foo11(x: any) { } 123 124function foo12(x: I); 125function foo12(x: C<string>); // error 126function foo12(x: any) { } 127 128function foo12b(x: I2<string>); 129function foo12b(x: C<string>); // error 130function foo12b(x: any) { } 131 132function foo13(x: I); 133function foo13(x: typeof a); // error 134function foo13(x: any) { } 135 136function foo14(x: I); 137function foo14(x: typeof b); // error 138function foo14(x: any) { } 139 140function foo15(x: I2<string>); 141function foo15(x: C<number>); // ok 142function foo15(x: any) { } 143 144