| // 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 the declared type of an positional optional parameter of t1 is not |
| /// assignable to a corresponding parameter of t2 (both t1 and t2 have a single |
| /// positional optional parameter). |
| /// @author iefremov |
| |
| import "../../../Utils/expect.dart"; |
| |
| class A {} |
| class B {} |
| |
| typedef t1([int p]); |
| typedef t3([A? p]); |
| typedef t4([List<A> p]); |
| typedef t5([t1? p]); |
| |
| main() { |
| Expect.isFalse(([double p = 3.14]) {} is t1); |
| Expect.isFalse(([bool p = false]) {} is t1); |
| Expect.isFalse(([A? p]) {} is t1); |
| Expect.isFalse(([List<int> p = const [3, 1, 4]]) {} is t1); |
| Expect.isFalse(([t3? p]) {} is t1); |
| |
| Expect.isFalse(([double p = 0]) {} is t3); |
| Expect.isFalse(([bool p = true]) {} is t3); |
| Expect.isFalse(([List<int> p = const []]) {} is t3); |
| Expect.isFalse(([t3? p]) {} is t3); |
| Expect.isFalse(([B? p]) {} is t3); |
| |
| Expect.isFalse(([double p = 0]) {} is t4); |
| Expect.isFalse(([bool p = false]) {} is t4); |
| Expect.isFalse(([A? p]) {} is t4); |
| Expect.isFalse(([List<int> p = const [3, 1, 4]]) {} is t4); |
| Expect.isFalse(([List<B>? p]) {} is t4); |
| Expect.isFalse(([t3? p]) {} is t4); |
| |
| Expect.isFalse(([double p = 3.14]) {} is t5); |
| Expect.isFalse(([bool p = false]) {} is t5); |
| Expect.isFalse(([A? p]) {} is t5); |
| Expect.isFalse(([List<int> p = const [1, 2, 3]]) {} is t5); |
| Expect.isFalse(([t3? p]) {} is t5); |
| Expect.isFalse(([t4? p]) {} is t5); |
| Expect.isFalse(([t5? p]) {} is t5); |
| } |