Re: [Xlw-users] optional CellMatrix

[Mark j. <mar...@gm...>]

You can use the

IsEmpty()

method on the element (0,0) of the input.



On 31 December 2014 at 02:05, Matthias Ruess <mr...@gm...> wrote:
> Hi XLW-team,
>
> I have a function that takes a CellMatrix as input
>
> int someFunction(
>    const CellMatrix& A //optional argument
> )
> {
>    return A.RowsInStructure();
> }
>
> When calling someFunction with no arguments in Excel then someFunction
> returns 1 and A(0,0) is empty (because of ctor?!).
>
> When calling someFunction from Excel with a blank 1x1 CellMatrix I get the
> same result.
>
> Question:
> How can I find out if someFunction was called with no argument or with a
> blank 1x1 CellMatrix?
>
> Matt
>
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-- 

Prof Mark Joshi
Centre for Actuarial Studies
University of Melbourne
My website is www.markjoshi.com