blob: 73ba8a3fe60e6ba30e968f4ffa02b205f9427a5c [file] [log] [blame]
* 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:
* Interface Compositionality: T0 is an interface type
* C0<S0, ..., Sk> and T1 is C0<U0, ..., Uk> and each Si <: Ui
* @description Check that if type T0 is an interface type
* C0<S0, ..., Sk> and T1 is C0<U0, ..., Uk> and each Si <: Ui then T0 is a
* subtype of T1
* @author
* @description Check that if type T0 is a subtype of a type T1, then instance
* of T0 can be be used as a return value of type T1
* @author
* This test is generated from interface_compositionality_A01.dart and
* return_value_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
abstract class U0 {}
abstract class U1 {}
abstract class U2 {}
abstract class S0 extends U0 {}
abstract class S1 extends U1 {}
abstract class S2 extends U2 {}
class C0<X, Y, Z> {
const C0();
C0<S0, S1, S2> t0Instance = new C0<S0, S1, S2>();
C0<U0, U1, U2> t1Instance = new C0<U0, U1, U2>();
const t1Default = const C0<U0, U1, U2>();
C0<U0, U1, U2> returnValueFunc() => t0Instance;
class ReturnValueTest {
static C0<U0, U1, U2> staticTestMethod() => t0Instance;
C0<U0, U1, U2> testMethod() => t0Instance;
C0<U0, U1, U2> get testGetter => t0Instance;
main() {
C0<U0, U1, U2> returnValueLocalFunc() => t0Instance;
new ReturnValueTest().testMethod();
new ReturnValueTest().testGetter;