pkg/front_end/testcases/general/infer_equals.dart

// Copyright (c) 2020, 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
// @dart=2.6

class Class {
  var field;

  operator ==(o) {
    if (o is! Class) return false;
    return field == o.field;
  }
}

main() {}