gecko-dev/xpcom/ds/nsEmptyEnumerator.h

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* L. David Baron <dbaron@dbaron.org>
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
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*
* ***** END LICENSE BLOCK ***** */
/*
An empty enumerator.
*/
#include "nsISimpleEnumerator.h"
#include "nsIStringEnumerator.h"
////////////////////////////////////////////////////////////////////////
class EmptyEnumeratorImpl : public nsISimpleEnumerator,
public nsIUTF8StringEnumerator,
public nsIStringEnumerator
{
public:
EmptyEnumeratorImpl(void);
// nsISupports interface
NS_DECL_ISUPPORTS_INHERITED // not really inherited, but no mRefCnt
// nsISimpleEnumerator
NS_DECL_NSISIMPLEENUMERATOR
NS_DECL_NSIUTF8STRINGENUMERATOR
// can't use NS_DECL_NSISTRINGENUMERATOR because they share the
// HasMore() signature
NS_IMETHOD GetNext(nsAString& aResult);
static void Shutdown();
private:
~EmptyEnumeratorImpl(void);
};