// 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 Unless explicitly stated otherwise, all ordinary rules that apply
/// to methods apply to abstract methods.
/// It is a compile error if an instance method m1 overrides an instance member
/// m2 and m1 does not declare all the named parameters declared by m2.
/// @description Checks that a compile error is produced when the overriding
/// abstract method has fewer named parameters than the instance method being
/// overridden (2 vs 3) and neither have any required parameters. Test type alias
/// @author sgrekhov@unipro.ru

class A {
  f({var x, var y, var z}) {}
}
typedef AAlias = A;

class C extends AAlias {
  f({var x, var z});
//^
// [analyzer] unspecified
// [cfe] unspecified
}

main() {
  new A().f(x: 1, y: 2, z: 3);
  new C().f(x: 1, z: 2);
}