// 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 be used as an argument of type T1
/// @author sgrekhov@unipro.ru
///
/// This test is generated from left_null_A05.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.


class S {
  const S();
}

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

const t1Default = const S();


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

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

class ArgumentsBindingClass {
  ArgumentsBindingClass(S? t1) {}

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

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

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

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

  set testSetter(S? 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(t0Instance, t2: t0Instance);
  positionalArgumentsFunc1(t0Instance, t0Instance);

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

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

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

  // Test type parameters

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

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

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