| // Copyright (c) 2011, 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 function type (T1,...Tk,[Tk+1,...,Tn+m]) -> T is a subtype of |
| /// the function type (S1,...,Sk+j,[Sk+j+1,...,Sn]) -> S, if all of the following |
| /// conditions are met: |
| /// 1. Either |
| /// • S is void, or |
| /// • T <=> S. |
| /// 2. ∀i ∈ 1..n, Ti ⇐⇒ Si. |
| /// @description Checks that this statement is true for function types with no |
| /// arguments: S is some type, T is Dynamic (assignable to S). |
| /// @author iefremov |
| /// @issue 42648 |
| |
| // Requirements=nnbd-strong |
| import "../../../Utils/expect.dart"; |
| |
| typedef t1(); |
| typedef void t2(); |
| typedef int t3(); |
| typedef String t4(); |
| typedef double t5(); |
| typedef Object t6(); |
| typedef t1 t7(); |
| typedef List t8(); |
| typedef List<int> t9(); |
| typedef Map<int, List<List<List>>> t10(); |
| typedef t10 t11(); |
| typedef t11 t12(); |
| |
| |
| main() { |
| Expect.isTrue(() {} is t1); |
| Expect.isTrue(() {} is t2); |
| Expect.isFalse(() {} is t3); |
| Expect.isFalse(() {} is t4); |
| Expect.isFalse(() {} is t5); |
| Expect.isFalse(() {} is t6); |
| Expect.isFalse(() {} is t7); |
| Expect.isFalse(() {} is t8); |
| Expect.isFalse(() {} is t9); |
| Expect.isFalse(() {} is t10); |
| Expect.isFalse(() {} is t11); |
| Expect.isFalse(() {} is t12); |
| } |