| /* |
| * 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 quite complex function |
| * types: non-dynamic return type and a bunch of required and positional optional |
| * parameters. |
| * @author iefremov |
| */ |
| import "../../../Utils/expect.dart"; |
| |
| class A {} |
| class A1 {} |
| class A2 {} |
| class B implements A, A1, A2 {} |
| class C implements B {} |
| class D implements C {} |
| |
| typedef B func(Object o); |
| typedef B t1(int i, B b, Map<int, num> m, var x, [var ox, B? ob, List<num>? ol, bool? obool]); |
| |
| B f1(int i, B b, Map<int, num> m, var x, [var ox, D? ob, List<num>? ol, bool? obool]) => new B(); |
| D f2(int i, D b, Map<int, int> m, func x, [func? ox, D? ob, List<int>? ol, bool? obool]) => new D(); |
| C f3(num i, A b, Map<Object, Object> m, var x, [var ox, A2? ob, List? ol, Object? obool]) => new C(); |
| C f4(num i, A b, Map<Object, Object> m, var x, [var ox, A2? ob, List? ol, bool? obool, A? xx, B? yy]) => new C(); |
| A f5(num i, A b, Map<Object, Object> m, var x, [var ox, A2? ob, List? ol, Object? obool]) => new A(); |
| |
| main() { |
| Expect.isFalse(f1 is t1); |
| Expect.isFalse(f2 is t1); |
| Expect.isTrue(f3 is t1); |
| Expect.isTrue(f4 is t1); |
| Expect.isFalse(f5 is t1); |
| } |