LanguageFeatures/Augmentation-libraries/augmenting_declarations_A04_t02.dart

// Copyright (c) 2024, 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 An augmentation declaration D is a declaration marked with the
/// new built-in identifier `augment`, which makes D augment a declaration D1
/// with the same name and in the same context as D. D1 is determined as being
/// before D and after every other declaration with the same name and in the
/// same context which is before D (that is, D1 is the greatest declaration
/// which is smaller than D, according to the 'after' ordering). A compile-time
/// error occurs if no declaration satisfies the requirements on D1.
///
/// @description Checks that it is a compile-time error if an augmentation
/// declaration augments member defined in a mixin.
/// @author sgrekhov22@gmail.com

// SharedOptions=--enable-experiment=macros

mixin M {
  final String variable = "Variable";
  String method() => "Method";
  String get getter => "Getter";
  void set setter(String _) {}
  String operator +(Object? other) => "Operator";
}

class C = Object with M;

/**/augment class C {
//  ^^^^^^^
// [analyzer] unspecified
// [cfe] unspecified
  augment String variable = "Variable";
//^^^^^^^
// [analyzer] unspecified
// [cfe] unspecified
  augment String method() => "Method";
//^^^^^^^
// [analyzer] unspecified
// [cfe] unspecified
  augment String get getter => "Getter";
//^^^^^^^
// [analyzer] unspecified
// [cfe] unspecified
  augment void set setter(String _) {}
//^^^^^^^
// [analyzer] unspecified
// [cfe] unspecified
  augment String operator +(Object? other) => "Operator";
//^^^^^^^
// [analyzer] unspecified
// [cfe] unspecified
}

main() {
  print(C);
}