// 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 used as an argument of type T1
/// @author sgrekhov@unipro.ru
///
/// This test is generated from left_null_A06.dart and 
/// arguments_binding_x01.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';

// Requirements=nnbd-weak
import "../../utils/legacy_lib.dart";

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

const t1Default = const X();


namedArgumentsFunc1(X? t1, {X? t2 = t1Default}) {}
positionalArgumentsFunc1(X? t1, [X? t2 = t1Default]) {}

namedArgumentsFunc2<X>(X t1, {required X t2}) {}

class ArgumentsBindingClass {
  ArgumentsBindingClass(X? t1) {}

  ArgumentsBindingClass.named(X? t1, {X? t2 = t1Default}) {}
  ArgumentsBindingClass.positional(X? t1, [X? t2 = t1Default]) {}

  factory ArgumentsBindingClass.fNamed(X? t1, {X? t2  = t1Default}) {
    return new ArgumentsBindingClass.named(t1, t2: t2);
  }
  factory ArgumentsBindingClass.fPositional(X? t1, [X? t2 = t1Default]) {
    return new ArgumentsBindingClass.positional(t1, t2);
  }

  static namedArgumentsStaticMethod(X? t1, {X? t2 = t1Default}) {}
  static positionalArgumentsStaticMethod(X? t1, [X? t2 = t1Default]) {}

  namedArgumentsMethod(X? t1, {X? t2 = t1Default}) {}
  positionalArgumentsMethod(X? t1, [X? t2 = t1Default]) {}

  set testSetter(X? val) {}
}

class ArgumentsBindingGen<X>  {
  ArgumentsBindingGen(X t1) {}

  ArgumentsBindingGen.named(X t1, {required X t2}) {}

  factory ArgumentsBindingGen.fNamed(X t1, {required X t2}) {
    return new ArgumentsBindingGen.named(t1, t2: t2);
  }

  namedArgumentsMethod(X t1, {required X t2}) {}

  set testSetter(X val) {}
}

main() {
  // test functions
  namedArgumentsFunc1(forgetType(t0Instance), t2: forgetType(t0Instance));
  positionalArgumentsFunc1(forgetType(t0Instance), forgetType(t0Instance));

  // test class constructors
  ArgumentsBindingClass instance1 =
      new ArgumentsBindingClass(forgetType(t0Instance));
  instance1 = new ArgumentsBindingClass.fNamed(forgetType(t0Instance),
      t2: forgetType(t0Instance));
  instance1 = new ArgumentsBindingClass.named(forgetType(t0Instance),
      t2: forgetType(t0Instance));
  instance1 = new ArgumentsBindingClass.positional(forgetType(t0Instance),
      forgetType(t0Instance));

  // tests methods and setters
  instance1.namedArgumentsMethod(forgetType(t0Instance),
      t2: forgetType(t0Instance));
  instance1.positionalArgumentsMethod(forgetType(t0Instance),
      forgetType(t0Instance));
  instance1.testSetter = forgetType(t0Instance);

  // test static methods
  ArgumentsBindingClass.namedArgumentsStaticMethod(forgetType(t0Instance),
      t2: forgetType(t0Instance));
  ArgumentsBindingClass.positionalArgumentsStaticMethod(
      forgetType(t0Instance), forgetType(t0Instance));

  // Test type parameters

  //# <-- NotGenericFunctionType
  // test generic functions
  namedArgumentsFunc2<X?>(forgetType(t0Instance), t2: forgetType(t0Instance));

  // test generic class constructors
  ArgumentsBindingGen<X?> instance2 =
      new ArgumentsBindingGen<X?>(forgetType(t0Instance));
  instance2 = new ArgumentsBindingGen<X?>.fNamed(forgetType(t0Instance),
      t2: forgetType(t0Instance));
  instance2 = new ArgumentsBindingGen<X?>.named(forgetType(t0Instance),
      t2: forgetType(t0Instance));

  // test generic class methods and setters
  instance2.namedArgumentsMethod(forgetType(t0Instance),
      t2: forgetType(t0Instance));
  instance2.testSetter = forgetType(t0Instance);
  //# -->
}