IEnumerable <string> CollectComments(CellRange a, CellRange b)
{
bool valFound = false;
foreach (var r in CellRange.EnumBetween(a, b))
{
Expr val;
sheet.vals.TryGetValue(r, out val);
val = val as IndexExpr;
if (valFound)
{
if (val == null)
{
yield break;
}
}
else if (val == null)
{
continue;
}
valFound = true;
string res;
if (val.nodeType == ExprType.Index)
{
var ie = (ConstExpr)((IndexExpr)val).index;
res = stringTable[Convert.ToInt32(ie.value)];
}
else
{
res = val.ToString();
}
if (!string.IsNullOrWhiteSpace(res))
{
yield return(res);
}
}
}