| // 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 The function type (T1, ... Tn, {Tx1 x1, ..., Txk xk}) -> T is a |
| * subtype of the function type (S1, ..., Sn, {Sy1 y1, ..., Sym ym }) -> S, if |
| * all of the following conditions are met: |
| * 1. Either |
| * • S is void, Or |
| * • T ⇐⇒ S. |
| * 2. ∀i ∈ 1..n, Ti ⇐⇒ Si . |
| * 3. k ≥ m and yi ∈ {x1 , ..., xk }, i ∈ 1..m. |
| * 4. For all yi ∈ {y1 , ..., ym }, yi = xj ⇒ Tj ⇐⇒ Si. |
| * @description Checks that this statement is true for quite complex function |
| * types: non-dynamic return type and a bunch of required and named optional |
| * parameters. |
| * This test is like A03/t04, but the order of named parameters is not altered. |
| * @author kaigorodov |
| */ |
| 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, A? ob, List<num>? ol, bool? obool, extraParam}) => 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 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(); |
| |
| main() { |
| Expect.isTrue(f1 is t1); |
| Expect.isFalse(f2 is t1); |
| Expect.isTrue(f4 is t1); |
| } |