| // Copyright (c) 2018, 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 T0 is a subtype of a type T1 (written T0 <: T1) |
| /// when: |
| /// Right Object: if T1 is Object then: |
| /// - if T0 is an unpromoted type variable with bound B then T0 <: T1 iff |
| /// B <: Object |
| /// - if T0 is a promoted type variable X & S then T0 <: T1 iff S <: Object |
| /// - if T0 is FutureOr<S> for some S, then T0 <: T1 iff S <: Object. |
| /// - if T0 is S* for any S, then T0 <: T1 iff S <: T1 |
| /// - if T0 is Null, dynamic, void, or S? for any S, then the subtyping does not |
| /// hold (per above, the result of the subtyping query is false). |
| /// - Otherwise T0 <: T1 is true. |
| /// @description Check that if T0 is FutureOr<S> for some S but S is not subtype |
| /// of Object then T0 is not subtype of T1 |
| /// @author sgrekhov@unipro.ru |
| /// |
| /// @description Check that if type T0 is not a subtype of a type T1, then |
| /// instance of T0 cannot be assigned to the to local variable of type T1 |
| /// @author sgrekhov@unipro.ru |
| /// |
| /// This test is generated from right_object_fail_A07.dart and |
| /// local_variable_fail_x01.dart. |
| /// Don't modify it. If you want to change this test, change one of the files |
| /// above and then run generator.dart to regenerate the tests. |
| |
| |
| import '../../utils/common.dart'; |
| import '../../../../Utils/expect.dart'; |
| |
| // Requirements=nnbd-strong |
| import "dart:async"; |
| |
| class S {} |
| |
| FutureOr<S?> t0Instance = null; |
| Object t1Instance = new Object(); |
| |
| const t1Default = const Object(); |
| |
| |
| |
| |
| class LocalVariableTest { |
| |
| LocalVariableTest() { |
| Object t1 = forgetType(t0Instance); |
| } |
| |
| LocalVariableTest.valid() {} |
| |
| static staticTest() { |
| Object t1 = forgetType(t0Instance); |
| } |
| |
| test() { |
| Object t1 = forgetType(t0Instance); |
| } |
| } |
| |
| main() { |
| bar () { |
| Object t1 = forgetType(t0Instance); |
| } |
| |
| Expect.throws(() { |
| Object t1 = forgetType(t0Instance); |
| }, (e) => e is TypeError || e is CastError); |
| |
| Expect.throws(() { |
| bar(); |
| }, (e) => e is TypeError || e is CastError); |
| |
| Expect.throws(() { |
| new LocalVariableTest(); |
| }, (e) => e is TypeError || e is CastError); |
| |
| Expect.throws(() { |
| new LocalVariableTest.valid().test(); |
| }, (e) => e is TypeError || e is CastError); |
| |
| Expect.throws(() { |
| LocalVariableTest.staticTest(); |
| }, (e) => e is TypeError || e is CastError); |
| } |