Language/Classes/Constructors/Generative_Constructors/formal_parameter_t07.dart

// Copyright (c) 2011, 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 various correct constructor parameters do not
/// produce compile-time errors.
/// @author msyabro


class C {
  C() {}
  C.initialFormal(this.x, int this.y, this.z) {}
  C.mixed(p1, this.x, [p2, this.y]) {}

  int? x, y, z;
}

main() {
  new C();
  new C.initialFormal(1, 2, 3);
  new C.mixed(null, null);
}