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diff --git a/include/formula/paramclass.hxx b/include/formula/paramclass.hxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
+/*
+ * 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/.
+ */
+
+#ifndef INCLUDED_FORMULA_PARAMCLASS_HXX
+#define INCLUDED_FORMULA_PARAMCLASS_HXX
+
+#include <sal/config.h>
+#include <sal/types.h>
+
+namespace formula
+{
+    enum ParamClass : sal_uInt8
+    {
+        Unknown = 0,    // MUST be zero for initialization mechanism!
+
+        /** Out of bounds, function doesn't expect that many parameters.
+            However, not necessarily returned if a module specific definition
+            for example returns type Value for an unlisted function. */
+        Bounds,
+
+        /** In array formula: single value to be passed. Results in JumpMatrix
+            being created and multiple calls to function. Functions handling a
+            formula::svDoubleRef by means of DoubleRefToPosSingleRef() or
+            PopDoubleRefOrSingleRef() or GetDouble() or GetString() should have
+            this. */
+        Value,
+
+        /** In array formula: area reference must stay reference. Otherwise
+            don't care. Functions handling a formula::svDoubleRef by means of
+            PopDoubleRefOrSingleRef() should not have this. */
+        Reference,
+
+        /** Like Reference but the function accepts also a list of references
+            (ocUnion svRefList) as one argument AND handles the special case of
+            an array of references in array mode. Then the resulting argument
+            for a parameter in JumpMatrix context may be an array of references
+            which then is to be preferred over a result matrix. This final
+            behaviour is the opposite of SuppressedReferenceOrForceArray. */
+        ReferenceOrRefArray,
+
+        /** In array formula: convert area reference to array. Function will be
+            called only once if no Value type is involved. Functions able to
+            handle a svMatrix parameter but not a formula::svDoubleRef parameter as area
+            should have this. */
+        Array,
+
+        /** Area reference must be converted to array in any case, and must
+            also be propagated to subsequent operators and functions being part
+            of a parameter of this function. */
+        ForceArray,
+
+        /** Area reference is not converted to array, but ForceArray must be
+            propagated to subsequent operators and functions being part of a
+            parameter of this function. Used with functions that treat
+            references separately from arrays, but need the forced array
+            calculation of parameters that are not references. */
+        ReferenceOrForceArray,
+
+        /** Same as ReferenceOrForceArray but suppressed / not inherited in the
+            compiler's ForceArray context to indicate that a result of
+            Reference in JumpMatrix context should use the result matrix
+            instead of the array of references. Never used as initial parameter
+            classification. */
+        SuppressedReferenceOrForceArray,
+
+        /** A function return forces the caller into array mode for this one
+            call, making it behave like it had ForceArray but not propagated to
+            any further operators in the same parameter. */
+        ForceArrayReturn
+    };
+}
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */