// 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 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 If T1 is S? 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 assigned to the mixin member of type T1
/// @author sgrekhov@unipro.ru
///
/// This test is generated from left_null_A05.dart and 
/// class_member_x03.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';


class S {
  const S();
}

Null t0Instance = null;
S? t1Instance = new S();

const t1Default = const S();


class ClassMemberMixin1_t03 {
  S? m = t1Default;

  void set superSetter(dynamic val) {}
}

class ClassMember1_t03 extends Object with ClassMemberMixin1_t03 {
  test() {
    m = forgetType(t0Instance);
    superSetter = forgetType(t0Instance);
  }
}

class ClassMemberMixin2_t03<X> {
  void set superSetter(dynamic val) {}
}

class ClassMember2_t03<X> extends Object with ClassMemberMixin2_t03<X> {
  X m;
  ClassMember2_t03(X x): m = x {  }
  test() {
    m = forgetType(t0Instance);
    superSetter = forgetType(t0Instance);
  }
}

main() {
  ClassMember1_t03 c1 = new ClassMember1_t03();
  c1.m = forgetType(t0Instance);
  c1.test();
  c1.superSetter = forgetType(t0Instance);

  // Test type parameters

  //# <-- NotGenericFunctionType
  ClassMember2_t03<S?> c2 = new ClassMember2_t03<S?>(t1Instance);
  c2.m = forgetType(t0Instance);
  c2.test();
  c2.superSetter = forgetType(t0Instance);
  //# -->
}