| // 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 function type t1 is not a subtype of function type |
| /// t2 even if just one of its required parameters has a type that is not |
| /// mutually assignable with the type of the corresponding required parameter of |
| /// t2. |
| /// @author rodionov |
| |
| import "../../../Utils/expect.dart"; |
| |
| class B {} |
| |
| 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(double i, B b, Map<int, num> m, var x, {var ox, B? ob, List<num>? ol, bool? obool}) => new B(); |
| // ^^^ double <=/=> int |
| B f2(int i, func b, Map<int, num> m, var x, {var ox, B? ob, List<num>? ol, bool? obool}) => new B(); |
| // ^^^ func <=/=> B |
| B f3(int i, B b, Map<int, func> m, var x, {var ox, B? ob, List<num>? ol, bool? obool}) => new B(); |
| // ^^^ func <=/=> num |
| |
| main() { |
| Expect.isFalse(f1 is t1); |
| Expect.isFalse(f2 is t1); |
| Expect.isFalse(f3 is t1); |
| } |