--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/xlsx/xlsxcellformula_p.h	Tue Mar 22 10:38:08 2016 +0100
@@ -0,0 +1,64 @@
+/****************************************************************************
+** Copyright (c) 2013-2014 Debao Zhang <hello@debao.me>
+** All right reserved.
+**
+** Permission is hereby granted, free of charge, to any person obtaining
+** a copy of this software and associated documentation files (the
+** "Software"), to deal in the Software without restriction, including
+** without limitation the rights to use, copy, modify, merge, publish,
+** distribute, sublicense, and/or sell copies of the Software, and to
+** permit persons to whom the Software is furnished to do so, subject to
+** the following conditions:
+**
+** The above copyright notice and this permission notice shall be
+** included in all copies or substantial portions of the Software.
+**
+** THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+** NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+** LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+** OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+** WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+**
+****************************************************************************/
+#ifndef XLSXCELLFORMULA_P_H
+#define XLSXCELLFORMULA_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt Xlsx API.  It exists for the convenience
+// of the Qt Xlsx.  This header file may change from
+// version to version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include "xlsxglobal.h"
+#include "xlsxcellformula.h"
+#include "xlsxcellrange.h"
+
+#include <QSharedData>
+#include <QString>
+
+QT_BEGIN_NAMESPACE_XLSX
+
+class CellFormulaPrivate : public QSharedData
+{
+public:
+    CellFormulaPrivate(const QString &formula, const CellRange &reference, CellFormula::FormulaType type);
+    CellFormulaPrivate(const CellFormulaPrivate &other);
+    ~CellFormulaPrivate();
+
+    QString formula; //formula contents
+    CellFormula::FormulaType type;
+    CellRange reference;
+    bool ca; //Calculate Cell
+    int si;  //Shared group index
+};
+
+QT_END_NAMESPACE_XLSX
+
+#endif // XLSXCELLFORMULA_P_H