blob: 52444c10585e00a506fa60cdc670d5ac6c49e2b7 [file] [log] [blame]
// Copyright (c) 2020, 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:
/// Left Null: if T0 is Null then:
/// - if T1 is a type variable (promoted or not) the query is false
/// - If T1 is FutureOr<S> for some S, then the query is true iff Null <: S.
/// - If T1 is Null, S? or S* for some S, then the query is true.
/// - Otherwise, the query is false
/// @description Check that if type T0 is Null and T1 is FutureOr<S> for some S,
/// and Null is not subtype of S 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.
/// Assignment to local variable is tested.
/// @author sgrekhov@unipro.ru
/// @author ngl@unipro.ru
///
/// This test is generated from test_types/left_null_fail_A01.dart and
/// test_cases/local_variable_fail_x01.dart. Don't modify it!
/// If you need to change this test, then change one of the files above and then
/// run generator/generator.dart to regenerate the tests.
import "dart:async";
Null t0Instance = null;
FutureOr<Object> t1Instance = new Object();
const t1Default = const Object();
class LocalVariableTest {
LocalVariableTest() {
FutureOr<Object> t1 = t0Instance;
// ^^^^^^^^^^
// [analyzer] unspecified
// [cfe] unspecified
}
test() {
FutureOr<Object> t1 = t0Instance;
// ^^^^^^^^^^
// [analyzer] unspecified
// [cfe] unspecified
}
static staticTest() {
FutureOr<Object> t1 = t0Instance;
// ^^^^^^^^^^
// [analyzer] unspecified
// [cfe] unspecified
}
}
main() {
FutureOr<Object> t1 = t0Instance;
// ^^^^^^^^^^
// [analyzer] unspecified
// [cfe] unspecified
bar () {
FutureOr<Object> t1 = t0Instance;
// ^^^^^^^^^^
// [analyzer] unspecified
// [cfe] unspecified
}
}