// Copyright (c) 2019, 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.

// @dart = 2.9

/// @assertion A simple member invocation on a target expression X is an
/// expression of one of the forms:
/// Member invocation on target X	     Corresponding member name
///        X[expr2] = expr3                        []=
/// @description Check explicit extension member invocation in form of
/// X[expr2] = expr3
/// @author sgrekhov@unipro.ru

import "../../Utils/expect.dart";

class C {
  String value = "";
  void operator []=(int index, String value) {
    this.value = "C:$value:$index";
  }
}

extension Extension1 on C {
  String operator [](int index) => "Show must go on:$index";
}

main() {
  C c = new C();
  Extension1(c)[42] = "Lily was here";
//             ^^^^
// [analyzer] unspecified
// [cfe] unspecified
}