| /* |
| * Copyright (c) 2019, the Dart project authors. Please see the AUTHORS file |
| * for details. All rights reserved. Use of this source code is governed by a |
| * BSD-style license that can be found in the LICENSE file. |
| */ |
| /** |
| * @assertion A generic type alias is a declaration [D] of one of the following |
| * forms: |
| * m typedef id<X1 extends B1, . . . , Xs extends Bs> = T; |
| * m typedef S? id<X1 extends B1, . . . , Xs extends Bs>( |
| * T1 p1, . . . , Tn pn, [Tn+1 pn+1, . . . , Tn+k pn+k]); |
| * m typedef S? id<X1 extends B1, . . . , Xs extends Bs>( |
| * T1 p1, . . . , Tn pn, {Tn+1 pn+1, . . . , Tn+k pn+k}); |
| * where [m] is derived from metadata, [T] is a type, and [S?] is a type or the |
| * empty string. Let [S0] be [S?] if it is a type, otherwise let [S0] be |
| * [dynamic]. The associated type of [D], call it [F], is, respectively: |
| * T |
| * S0 Function(T1, . . . , Tn, [Tn+1, . . . , Tn+k]) |
| * S0 Function(T1, . . . , Tn, {Tn+1 xn+1, . . . , Tn+k xn+k}) |
| * ... |
| * Moreover, let [T1], . . . , [Tl] be types and let [U] be the parameterized |
| * type id<T1, . . . , Tl> in a location where [id] denotes [D]. ... It is a |
| * compile-time error if [U] is not well-bounded |
| * @description Checks that compile error is thrown if [U] is not well-bounded. |
| * @Issue 36959, 37050 |
| * @author iarkh@unipro.ru |
| */ |
| // SharedOptions=--enable-experiment=nonfunction-type-aliases |
| |
| class A<X extends A<X>> {} |
| |
| typedef AAlias<T extends A<T>> = T Function<T>(); |
| |
| main() { |
| AAlias a1; |
| AAlias<A> a2; |
| AAlias<A<Never>> a3; |
| AAlias<A<dynamic>> a4; |
| AAlias<A<Object?>> a5; |
| AAlias<A<int>> a6; |
| // [error line 40, column 0] |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| AAlias<int> a7; |
| // ^^^ |
| // [analyzer] COMPILE_TIME_ERROR.TYPE_ARGUMENT_NOT_MATCHING_BOUNDS |
| // ^ |
| // [cfe] Type argument 'int' doesn't conform to the bound 'A<T>' of the type variable 'T' on 'AAlias'. |
| AAlias<A<Null>> a8; |
| // [error line 49, column 0] |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| AAlias<dynamic> a9; |
| } |
