| // 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 function type t1 is not a subtype of function type |
| /// t2 if return types of t1 and t2 are not mutually assignable. |
| /// @author iefremov |
| |
| import "../../../Utils/expect.dart"; |
| |
| class A {} |
| class B {} |
| |
| typedef int t1(); |
| typedef A t2(); |
| typedef List<A> t3(); |
| typedef t1 t4(); |
| |
| double f1() => 3.14; |
| bool f2() => false; |
| A f3() => new A(); |
| List<int> f4() => [3, 1, 4]; |
| t2? f5() {} |
| t3? f6() {} |
| |
| main() { |
| Expect.isFalse(f1 is t1); |
| Expect.isFalse(f2 is t1); |
| Expect.isFalse(f3 is t1); |
| Expect.isFalse(f4 is t1); |
| Expect.isFalse(f5 is t1); |
| Expect.isFalse(f5 is t1); |
| |
| Expect.isFalse(f1 is t2); |
| Expect.isFalse(f2 is t2); |
| Expect.isFalse(f4 is t2); |
| Expect.isFalse(f5 is t2); |
| Expect.isFalse(f6 is t2); |
| |
| Expect.isFalse(f1 is t3); |
| Expect.isFalse(f2 is t3); |
| Expect.isFalse(f3 is t3); |
| Expect.isFalse(f4 is t3); |
| Expect.isFalse(f5 is t3); |
| Expect.isFalse(f6 is t3); |
| |
| Expect.isFalse(f1 is t4); |
| Expect.isFalse(f2 is t4); |
| Expect.isFalse(f3 is t4); |
| Expect.isFalse(f4 is t4); |
| Expect.isFalse(f5 is t4); |
| Expect.isFalse(f6 is t4); |
| } |