ValueEval retval = null;
StringBuffer sb = new StringBuffer();
for (int i=0, iSize=operands.length; i<iSize; i++) {
ValueEval ve = singleOperandEvaluate(operands[i], srcCellRow, srcCellCol);
if (ve instanceof StringValueEval) {
StringValueEval sve = (StringValueEval) ve;
sb.append(sve.getStringValue());
}
else if (ve instanceof BlankEval) {}
else {
retval = ErrorEval.VALUE_INVALID;
break;
}
}
if (retval == null) {
retval = new StringEval(sb.toString());
}
return retval;
