LanguageFeatures/nnbd/expression_typing_A06_t01.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.

/// @assertion In legacy mode, an override of operator== with no explicit
/// parameter type inherits the parameter type of the overridden method if any
/// override of operator== between the overriding method and Object.== has an
/// explicit parameter type. Otherwise, the parameter type of the overriding
/// method is dynamic.
///
/// @description Checks that in legacy mode, an override of operator== with no
/// explicit parameter type inherits the parameter type of the overridden method
/// if any override of operator== between the overriding method and Object.== has
/// an explicit parameter type
/// @author sgrekhov@unipro.ru
/// @issue 41283

// Requirements=nnbd-strong

class A {
  bool operator ==(covariant A other) => true;
}

class C extends A {
  bool operator ==(other) => true;
}

main() {
  C c = new C();
  A a = new A();
  c == a;
  c == "c";
//     ^^^
// [analyzer] unspecified
// [cfe] unspecified
}