/*
 * Copyright (c) 2001-2006
 *     DecisionSoft Limited. All rights reserved.
 * Copyright (c) 2004-2006
 *     Progress Software Corporation. All rights reserved.
 * Copyright (c) 2004-2006
 *     Oracle. All rights reserved.
 *
 * See the file LICENSE for redistribution information.
 *
 * $Id: FunctionNilled.hpp,v 1.9 2006/11/01 16:37:13 jpcs Exp $
 */

/*
 fn:nilled($arg as node) as boolean?
*/

#ifndef _FUNCTIONNILLED_HPP
#define _FUNCTIONNILLED_HPP

#include <xqilla/framework/XQillaExport.hpp>

#include <xqilla/ast/XQFunction.hpp>

class XQILLA_API FunctionNilled : public XQFunction
{
public:
  static const XMLCh name[];
  static const unsigned int minArgs;
  static const unsigned int maxArgs;

  FunctionNilled(const VectorOfASTNodes &args, XPath2MemoryManager* memMgr);

  virtual ASTNode* staticResolution(StaticContext *context);
  virtual ASTNode *staticTyping(StaticContext *context);

  Sequence collapseTreeInternal(DynamicContext* context, int flags=0) const;
};

#endif // _FUNCTIONNILLED_HPP