| // 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 say that a type T is non-nullable if T <: Object. This is |
| * equivalent to the syntactic criterion that T is any of: |
| * Never |
| * Any function type (including Function) |
| * Any interface type except Null. |
| * S* for some S where S is non-nullable |
| * FutureOr<S> where S is non-nullable |
| * X extends S where S is non-nullable |
| * X & S where S is non-nullable |
| * |
| * @description Check that type which is not subtype of Object cannot be |
| * assigned to non-nullable type. Test interface type. Test type aliases |
| * @author sgrekhov@unipro.ru |
| */ |
| // SharedOptions=--enable-experiment=nonfunction-type-aliases |
| |
| abstract class A { |
| void foo(int i); |
| } |
| |
| class C { |
| int bar(int i) => i; |
| } |
| |
| typedef AAlias = A; |
| typedef CAlias = C; |
| |
| main() { |
| AAlias a1 = null; |
| // ^^^^ |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| |
| CAlias c1 = null; |
| // ^^^^ |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| |
| AAlias? a = null; |
| AAlias a2 = a; |
| // ^ |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| |
| var c = new C() as CAlias?; |
| CAlias c2 = c; |
| // ^ |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| } |
