https://issues.apache.org/bugzilla/show_bug.cgi?id=48195

           Summary: Optimise evaluation of IF() and CHOOSE() - avoid eager
                    evaluation of unused operands
           Product: POI
           Version: 3.1
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: enhancement
          Priority: P2
         Component: HSSF
        AssignedTo: [email protected]
        ReportedBy: [email protected]


Sometimes referred to as "short-circuit" evaluation.  The formula Ptg arrays
are already marked up with Attr tokens (tAttrIf, tAttrChoose and tAttrSkip) to
help with this.  POI currently ignores these tokens, and by default does eager
evaluation on all operands.

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