// 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:
 * Left FutureOr: T0 is FutureOr<S0>
 *   and Future<S0> <: T1
 *   and S0 <: T1
 * @description Check that if a type T0 is FutureOr<S0> and Future<S0> and S0
 * are subtypes of a type T1, then a type T0 is a subtype of a type T1. Case
 * when an instance of T0 is an instance of Future<S0> type and S0 is a generic
 * type
 * @author sgrekhov@unipro.ru
 */
/**
 * @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 sgrekhov@unipro.ru
 */
/*
 * This test is generated from left_FutureOr_A04.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.
 */


import '../../utils/common.dart';
import "dart:async";

class A {}
class B extends A {}
class C<X> {
  const C();
}
class S0<X> extends C<X> {}

FutureOr<S0<B>> t0Instance = new Future<S0<B>>.value(new S0<B>());
FutureOr<C<A>> t1Instance = new Future<C<A>>.value(new C<A>());

const t1Default = const C<A>();


FutureOr<C<A>> returnValueFunc() => forgetType(t0Instance);

class ReturnValueTest {
  static FutureOr<C<A>> staticTestMethod() => forgetType(t0Instance);

  FutureOr<C<A>> testMethod() => forgetType(t0Instance);

  FutureOr<C<A>> get testGetter => forgetType(t0Instance);
}

class ReturnValueGen<X> {
  X testMethod() => forgetType(t0Instance);
  X get testGetter => forgetType(t0Instance);
}


main() {
  FutureOr<C<A>> returnValueLocalFunc() => forgetType(t0Instance);

  returnValueFunc();
  returnValueLocalFunc();

  ReturnValueTest.staticTestMethod();

  new ReturnValueTest().testMethod();
  new ReturnValueTest().testGetter;

  // Test type parameters

  //# <-- NotGenericFunctionType
  new ReturnValueGen<FutureOr<C<A>>>().testMethod();
  new ReturnValueGen<FutureOr<C<A>>>().testGetter;
  //# -->
}