| // Copyright (c) 2019, 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 We define inherited(J, K) to be |
| /// the set of members m such that all of the following hold: |
| /// • m is accessible to K and |
| /// • A is a direct superinterface of J and either |
| /// – A declares a member m or |
| /// – m is a member of inherited(A, K). |
| /// • m is not overridden by J. |
| /// ... |
| /// Otherwise, if the static types T1,...,Tk of the members m1,...,mk are not |
| /// identical, then there must be a member mx such that Tx <: Ti, 1 ≤ x ≤ k for |
| /// all i ∈ 1..k, or a static type warning occurs. The member that is inherited |
| /// is mx, if it exists; otherwise: let numberOf P ositionals(f) denote the |
| /// number of positional parameters of a function f, and let numberOf |
| /// RequiredParams(f) denote the number of required parameters of a function f. |
| /// Furthermore, let s denote the set of all named parameters of the m1,...,mk. |
| /// Then let |
| /// h = max(numberOf Positionals(mi)), |
| /// r = min(numberOf RequiredParams(mi)), i ∈ 1..k. |
| /// Then I has a method named n, with r required parameters of type dynamic, |
| /// h positional parameters of type dynamic, named parameters s of type dynamic |
| /// and return type dynamic. |
| /// @description Checks that there's no static warning produced when the |
| /// subinterface member being accessed is actually inherited. Members tested |
| /// include variables, methods, getters, setters and operators. There's no way |
| /// to check whether the resulting inherited method signature is actually as |
| /// described above, but we can check that it's inherited at all. Test type |
| /// aliases |
| /// @author sgrekhov@unipro.ru |
| |
| import '../../../../Utils/expect.dart'; |
| |
| class C {} |
| class D extends C {} |
| |
| abstract class SI1 { |
| int method(num? v, String? p, {int? o1, Pattern? o2}); |
| int method2(C? v, [D? o]); |
| int? get gett0r; |
| void set sett0r(int? v); |
| C operator +(C v); |
| } |
| |
| abstract class SI2 { |
| void method(num? v, String? p, {int? o1, Pattern? o2}); |
| num method2(C? v, [D? o]); |
| num? get gett0r; |
| void set sett0r(num? v); |
| C operator +(C v); |
| } |
| |
| typedef SIAlias1 = SI1; |
| typedef SIAlias2 = SI2; |
| |
| abstract class I implements SIAlias1, SIAlias2, C {} |
| |
| main() { |
| I? i = null; |
| |
| i?.method(null, null, o1:null, o2:null); |
| var v = i?.method2(null, null); |
| num? n = i?.gett0r; |
| i?.sett0r = null; |
| Expect.throws(() {var v = (i as I) + (i as I);}); |
| } |