/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef nsEnumeratorUtils_h_
#define nsEnumeratorUtils_h_

#include "nscore.h"

class nsISupports;
class nsISimpleEnumerator;

nsresult NS_NewEmptyEnumerator(nsISimpleEnumerator** aResult);

nsresult NS_NewSingletonEnumerator(nsISimpleEnumerator** aResult,
                                   nsISupports* aSingleton);

nsresult NS_NewUnionEnumerator(nsISimpleEnumerator** aResult,
                               nsISimpleEnumerator* aFirstEnumerator,
                               nsISimpleEnumerator* aSecondEnumerator);

#endif /* nsEnumeratorUtils_h_ */