// 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]                                   []
/// @description Check explicit extension member invocation in form of X[expr2]
/// @author sgrekhov@unipro.ru


class C {
  String operator [](int index) => "Lily was here:" + index.toString();
}

extension Extension1 on C {
  String operator +(C other) => "Show must go on";
}
main() {
  C c = new C();
  Extension1(c)[42];
//             ^^^^
// [analyzer] unspecified
// [cfe] unspecified
}