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diff --git a/sc/inc/formularesult.hxx b/sc/inc/formularesult.hxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include "global.hxx"
+#include "calcmacros.hxx"
+#include <svl/sharedstring.hxx>
+#include <formula/token.hxx>
+#include <formula/types.hxx>
+
+class ScMatrixFormulaCellToken;
+
+namespace sc {
+
+struct FormulaResultValue
+{
+    enum Type : sal_uInt8 { Invalid, Value, String, Error };
+
+    double mfValue;
+    svl::SharedString maString;
+    bool mbMultiLine = false;
+    Type meType;
+    FormulaError mnError;
+
+    FormulaResultValue();
+    FormulaResultValue( double fValue );
+    FormulaResultValue( svl::SharedString aStr, bool bMultiLine );
+    FormulaResultValue( FormulaError nErr );
+};
+
+}
+
+/** Store a variable formula cell result, balancing between runtime performance
+    and memory consumption. */
+class ScFormulaResult
+{
+    typedef unsigned char Multiline;
+    static const Multiline MULTILINE_UNKNOWN = 0;
+    static const Multiline MULTILINE_FALSE   = 1;
+    static const Multiline MULTILINE_TRUE    = 2;
+
+    union
+    {
+        double          mfValue;    // double result direct for performance and memory consumption
+        const formula::FormulaToken*  mpToken;    // if not, result token obtained from interpreter
+    };
+    bool                mbToken :1; // whether content of union is a token
+    bool                mbEmpty :1; // empty cell result
+    bool                mbEmptyDisplayedAsString :1;    // only if mbEmpty
+    // If set it implies that the result is a simple double (in mfValue) and no error
+    bool                mbValueCached :1;
+    Multiline           meMultiline :2; // result is multiline
+    FormulaError        mnError;    // error code
+
+    /** Reset mnError, mbEmpty and mbEmptyDisplayedAsString to their defaults
+        prior to assigning other types */
+    void ResetToDefaults();
+
+    /** If token is of formula::svError set error code and decrement RefCount.
+        If token is of formula::svEmptyCell set mbEmpty and mbEmptyAsString and
+        decrement RefCount.
+        If token is of formula::svDouble set mfValue and decrement RefCount.
+        Else assign token to mpToken. NULL is valid => svUnknown.
+        Other member variables are set accordingly.
+        @precondition: Token MUST had been IncRef'ed prior to this call!
+        @precondition: An already existing different mpToken MUST had been
+        DecRef'ed prior to this call, p will be assigned to mpToken if not
+        resolved.
+        ATTENTION! Token may get deleted in this call! */
+    void ResolveToken( const formula::FormulaToken * p );
+
+public:
+    /** Effectively type svUnknown. */
+    ScFormulaResult();
+
+    ScFormulaResult( const ScFormulaResult & r );
+
+    /** Same comments as for SetToken() apply! */
+    explicit ScFormulaResult( const formula::FormulaToken* p );
+
+    ~ScFormulaResult();
+
+    /** Well, guess what ... */
+    ScFormulaResult& operator=( const ScFormulaResult & r );
+
+    /** Assignment as in operator=() but without return */
+    void Assign( const ScFormulaResult & r );
+
+    /** Sets a direct double if token type is formula::svDouble, or mbEmpty if
+        formula::svEmptyCell, else token. If p is NULL, that is set as well, effectively
+        resulting in GetType()==svUnknown. If the already existing result is
+        ScMatrixFormulaCellToken, the upper left is set to token.
+
+        ATTENTION! formula::FormulaToken had to be allocated using 'new' and if of type
+        formula::svDouble and no RefCount was set may not be used after this call
+        because it was deleted after decrement! */
+    void SetToken( const formula::FormulaToken* p );
+
+    /** May be NULL if SetToken() did so, also if type formula::svDouble or formula::svError! */
+    formula::FormulaConstTokenRef GetToken() const;
+
+    /** Return upper left token if formula::svMatrixCell, else return GetToken().
+        May be NULL if SetToken() did so, also if type formula::svDouble or formula::svError! */
+    formula::FormulaConstTokenRef GetCellResultToken() const;
+
+    /** Return type of result, including formula::svError, formula::svEmptyCell, formula::svDouble and
+        formula::svMatrixCell. */
+    formula::StackVar GetType() const;
+
+    /** If type is formula::svMatrixCell return the type of upper left element, else
+        GetType() */
+    formula::StackVar GetCellResultType() const;
+
+    /** If type is formula::svEmptyCell (including matrix upper left) and should be
+        displayed as empty string */
+    bool IsEmptyDisplayedAsString() const;
+
+    /** Test for cell result type formula::svDouble, including upper left if
+        formula::svMatrixCell. Also included is formula::svError for legacy, because previously
+        an error result was treated like a numeric value at some places in
+        ScFormulaCell. Also included is formula::svEmptyCell as a reference to an empty
+        cell usually is treated as numeric 0. Use GetCellResultType() for
+        details instead. */
+    bool IsValue() const;
+
+    bool IsValueNoError() const;
+
+    /** Determines whether or not the result is a string containing more than
+        one paragraph */
+    bool IsMultiline() const;
+
+    bool GetErrorOrDouble( FormulaError& rErr, double& rVal ) const;
+    sc::FormulaResultValue GetResult() const;
+
+    /** Get error code if set or GetCellResultType() is formula::svError or svUnknown,
+        else 0. */
+    FormulaError GetResultError() const;
+
+    /** Set error code, don't touch token or double. */
+    void SetResultError( FormulaError nErr );
+
+    /** Set direct double. Shouldn't be used externally except in
+        ScFormulaCell for rounded CalcAsShown or SetErrCode() or
+        SetResultDouble(), see there for condition. If
+        ScMatrixFormulaCellToken the token isn't replaced but upper
+        left result is modified instead, but only if it was of type
+        formula::svDouble before or not set at all.
+     */
+    void SetDouble( double f );
+
+    /** Return value if type formula::svDouble or formula::svHybridCell or formula::svMatrixCell and upper
+        left formula::svDouble, else 0.0 */
+    double GetDouble() const;
+
+    /** Return string if type formula::svString or formula::svHybridCell or formula::svMatrixCell and
+        upper left formula::svString, else empty string. */
+    const svl::SharedString & GetString() const;
+
+    /** Return matrix if type formula::svMatrixCell and ScMatrix present, else NULL. */
+    ScConstMatrixRef GetMatrix() const;
+
+    /** Return formula string if type formula::svHybridCell, else empty string. */
+    OUString GetHybridFormula() const;
+
+    /** Should only be used by import filters, best in the order
+        SetHybridDouble(), SetHybridString(), or only SetHybridFormula() for
+        formula string to be compiled later. */
+    void SetHybridDouble( double f );
+
+    /** Should only be used by import filters, best in the order
+        SetHybridDouble(), SetHybridString()/SetHybridFormula(), or only
+        SetHybridFormula() for formula string to be compiled later. */
+    void SetHybridString( const svl::SharedString & rStr );
+
+    /** Should only be used by import filters, best in the order
+        SetHybridDouble(), SetHybridFormula(),
+        SetHybridEmptyDisplayedAsString() must be last. */
+    void SetHybridEmptyDisplayedAsString();
+
+    /** Should only be used by import filters, best in the order
+        SetHybridDouble(), SetHybridString()/SetHybridFormula(), or only
+        SetHybridFormula() for formula string to be compiled later. */
+    void SetHybridFormula( const OUString & rFormula );
+
+    void SetMatrix( SCCOL nCols, SCROW nRows, const ScConstMatrixRef& pMat, const formula::FormulaToken* pUL );
+
+    /** Get the const ScMatrixFormulaCellToken* if token is of that type, else
+        NULL. */
+    const ScMatrixFormulaCellToken* GetMatrixFormulaCellToken() const;
+
+    /** Get the ScMatrixFormulaCellToken* if token is of that type, else NULL.
+        Shouldn't be used externally except by ScFormulaCell::SetMatColsRows(). */
+    ScMatrixFormulaCellToken* GetMatrixFormulaCellTokenNonConst();
+};
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */