748     _prev( 0 ), _next( 0 ),  in XMLNode()
813         _lastChild = _lastChild->_prev;  in Unlink()
816     if ( child->_prev ) {  in Unlink()
817         child->_prev->_next = child->_next;  in Unlink()
820         child->_next->_prev = child->_prev;  in Unlink()
823 	child->_prev = 0;  in Unlink()
834 	TIXMLASSERT(node->_prev == 0);  in DeleteChild()
854         addThis->_prev = _lastChild;  in InsertEndChild()
863         addThis->_prev = 0;  in InsertEndChild()
882         TIXMLASSERT( _firstChild->_prev == 0 );  in InsertFirstChild()
884         _firstChild->_prev = addThis;  in InsertFirstChild()
888         addThis->_prev = 0;  in InsertFirstChild()
894         addThis->_prev = 0;  in InsertFirstChild()
929     addThis->_prev = afterThis;  in InsertAfterChild()
931     afterThis->_next->_prev = addThis;  in InsertAfterChild()
954     for( const XMLNode* node = _lastChild; node; node = node->_prev ) {  in LastChildElement()
978     for( const XMLNode* node = _prev; node; node = node->_prev ) {  in PreviousSiblingElement()