blob: 8465903e4af8c7e238a4ad804071bcc806d3944d [file] [log] [blame]
/*
* 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 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 an unpromoted type variable with bound B
* and B <: Object then T0 is subtype of T1
* @author sgrekhov@unipro.ru
*/
/**
* @description Check that if type T0 is a subtype of a type T1, then instance
* of T0 can be be assigned to the to global variable of type T1
* @author sgrekhov@unipro.ru
*/
/*
* This test is generated from right_object_A01.dart and
* global_variable_x01.dart.
* Don't modify it. If you want to change this file, change one of the files
* above and then run generator.dart to regenerate the tests.
*/
// SharedOptions=--enable-experiment=non-nullable
class B {}
class T0 extends B {}
T0 t0Instance = new T0();
Object t1Instance = new Object();
const t1Default = const Object();
class GlobalVariableTest {
GlobalVariableTest() {
t1Instance = t0Instance;
}
foo() {
t1Instance = t0Instance;
}
static test() {
t1Instance = t0Instance;
}
}
test<T extends B>(T t0Instance) {
bar () {
t1Instance = t0Instance;
}
t1Instance = t0Instance;
bar();
GlobalVariableTest t = new GlobalVariableTest();
t.foo();
GlobalVariableTest.test();
}
main() {
test<T0>(t0Instance);
}