private static ValueEval GetValueFromArea(TwoDEval ae, int pRowIx, int pColumnIx)
{
Debug.Assert(pRowIx >= 0);
Debug.Assert(pColumnIx >= 0);
TwoDEval result = ae;
if (pRowIx != 0)
{
// Slightly irregular logic for bounds checking errors
if (pRowIx > ae.Height)
{
// high bounds check fail gives #REF! if arg was explicitly passed
throw new EvaluationException(ErrorEval.REF_INVALID);
}
result = result.GetRow(pRowIx - 1);
}
if (pColumnIx != 0)
{
// Slightly irregular logic for bounds checking errors
if (pColumnIx > ae.Width)
{
// high bounds check fail gives #REF! if arg was explicitly passed
throw new EvaluationException(ErrorEval.REF_INVALID);
}
result = result.GetColumn(pColumnIx - 1);
}
return(result);
}
