Introduce and check FormulaTokenArray::mbFinalized to not add further tokens

Obviously after FormulaTokenArray::Assign() or the copy-ctor for that matter,
new tokens can not be added anymore to the shrunk code array. We don't do it,
but ensure that it isn't done in future..

Change-Id: Ibc0115f9f38e9745028a7459c61408c188783d03

1 files changed, 4 insertions, 3 deletions

diff --git a/include/formula/tokenarray.hxx b/include/formula/tokenarray.hxx
index 39e326b63ade..f7a8228a0d0e 100644
--- a/include/formula/tokenarray.hxx
+++ b/include/formula/tokenarray.hxx
@@ -125,9 +125,10 @@ protected:
     sal_uInt16      nIndex;                 // Current step index
     FormulaError    nError;                 // Error code
     ScRecalcMode    nMode;                  // Flags to indicate when to recalc this code
-    bool            bHyperLink;             // If HYPERLINK() occurs in the formula.
-    bool            mbFromRangeName;        // If this array originates from a named expression
-    bool            mbShareable;            // Whether or not it can be shared with adjacent cells.
+    bool            bHyperLink      :1;     // If HYPERLINK() occurs in the formula.
+    bool            mbFromRangeName :1;     // If this array originates from a named expression
+    bool            mbShareable     :1;     // Whether or not it can be shared with adjacent cells.
+    bool            mbFinalized     :1;     // Whether code arrays have their final used size and no more tokens can be added.
 
 protected:
     void                    Assign( const FormulaTokenArray& );