--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/xlsx/xlsxcellformula.h	Tue Mar 22 10:38:08 2016 +0100
@@ -0,0 +1,78 @@
+/****************************************************************************
+** 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 QXLSX_XLSXCELLFORMULA_H
+#define QXLSX_XLSXCELLFORMULA_H
+
+#include "xlsxglobal.h"
+#include <QExplicitlySharedDataPointer>
+
+class QXmlStreamWriter;
+class QXmlStreamReader;
+
+QT_BEGIN_NAMESPACE_XLSX
+
+class CellFormulaPrivate;
+class CellRange;
+class Worksheet;
+class WorksheetPrivate;
+
+class Q_XLSX_EXPORT CellFormula
+{
+public:
+    enum FormulaType {
+        NormalType,
+        ArrayType,
+        DataTableType,
+        SharedType
+    };
+
+    CellFormula();
+    CellFormula(const char *formula, FormulaType type=NormalType);
+    CellFormula(const QString &formula, FormulaType type=NormalType);
+    CellFormula(const QString &formula, const CellRange &ref, FormulaType type);
+    CellFormula(const CellFormula &other);
+    ~CellFormula();
+    CellFormula &operator =(const CellFormula &other);
+    bool isValid() const;
+
+    FormulaType formulaType() const;
+    QString formulaText() const;
+    CellRange reference() const;
+    int sharedIndex() const;
+
+    bool operator == (const CellFormula &formula) const;
+    bool operator != (const CellFormula &formula) const;
+
+    bool saveToXml(QXmlStreamWriter &writer) const;
+    bool loadFromXml(QXmlStreamReader &reader);
+private:
+    friend class Worksheet;
+    friend class WorksheetPrivate;
+    QExplicitlySharedDataPointer<CellFormulaPrivate> d;
+};
+
+QT_END_NAMESPACE_XLSX
+
+#endif // QXLSX_XLSXCELLFORMULA_H