// 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.

/// @assertion A formal constructor parameter is either a formal parameter or
/// an initializing formal. An initializing formal has the form this.id, where
/// id is the name of an instance variable of the immediately enclosing class.
/// It is a compile-time error if id is not the name of an instance variable of
/// the immediately enclosing class.
/// @description Checks that it is a compile-time error if id is the name of a
/// variable of the superinterface. Test type alias
/// @author sgrekhov@unipro.ru

// SharedOptions=--enable-experiment=nonfunction-type-aliases

abstract class I {
  var x;
}
typedef IAlias = I;

class C implements IAlias {
//    ^
// [analyzer] unspecified
// [cfe] unspecified

  C(this.x) {}
//  ^^^^
// [analyzer] unspecified
// [cfe] unspecified
}

main() {
  new C(null);
}