// Excel prefers to encode 'SUM()' as a tAttr token, but this evaluator
// expects the equivalent function token
ptg = FuncVarPtg.SUM;
}
if (attrPtg.isOptimizedChoose()) {
ValueEval arg0 = stack.pop();
int[] jumpTable = attrPtg.getJumpTable();
int dist;
int nChoices = jumpTable.length;
try {
int switchIndex = Choose.evaluateFirstArg(arg0, ec.getRowIndex(), ec.getColumnIndex());
if (switchIndex<1 || switchIndex > nChoices) {
stack.push(ErrorEval.VALUE_INVALID);
dist = attrPtg.getChooseFuncOffset() + 4; // +4 for tFuncFar(CHOOSE)
} else {
dist = jumpTable[switchIndex-1];
}
} catch (EvaluationException e) {
stack.push(e.getErrorEval());
dist = attrPtg.getChooseFuncOffset() + 4; // +4 for tFuncFar(CHOOSE)
}
// Encoded dist for tAttrChoose includes size of jump table, but
// countTokensToBeSkipped() does not (it counts whole tokens).
dist -= nChoices*2+2; // subtract jump table size
i+= countTokensToBeSkipped(ptgs, i, dist);
continue;
}
if (attrPtg.isOptimizedIf()) {
ValueEval arg0 = stack.pop();
boolean evaluatedPredicate;
try {
evaluatedPredicate = If.evaluateFirstArg(arg0, ec.getRowIndex(), ec.getColumnIndex());
} catch (EvaluationException e) {
stack.push(e.getErrorEval());
int dist = attrPtg.getData();
i+= countTokensToBeSkipped(ptgs, i, dist);
attrPtg = (AttrPtg) ptgs[i];
dist = attrPtg.getData()+1;
i+= countTokensToBeSkipped(ptgs, i, dist);
continue;
}
if (evaluatedPredicate) {
// nothing to skip - true param folows
} else {
int dist = attrPtg.getData();
i+= countTokensToBeSkipped(ptgs, i, dist);
Ptg nextPtg = ptgs[i+1];
if (ptgs[i] instanceof AttrPtg && nextPtg instanceof FuncVarPtg) {
// this is an if statement without a false param (as opposed to MissingArgPtg as the false param)
i++;
stack.push(BoolEval.FALSE);
}
}
continue;
}
if (attrPtg.isSkip()) {
int dist = attrPtg.getData()+1;
i+= countTokensToBeSkipped(ptgs, i, dist);
if (stack.peek() == MissingArgEval.instance) {
stack.pop();
stack.push(BlankEval.instance);
}
continue;
}
}
if (ptg instanceof ControlPtg) {
// skip Parentheses, Attr, etc
continue;
}
if (ptg instanceof MemFuncPtg || ptg instanceof MemAreaPtg) {
// can ignore, rest of tokens for this expression are in OK RPN order
continue;
}
if (ptg instanceof MemErrPtg) {
continue;
}
ValueEval opResult;
if (ptg instanceof OperationPtg) {
OperationPtg optg = (OperationPtg) ptg;
if (optg instanceof UnionPtg) { continue; }
int numops = optg.getNumberOfOperands();
ValueEval[] ops = new ValueEval[numops];
// storing the ops in reverse order since they are popping
for (int j = numops - 1; j >= 0; j--) {
ValueEval p = stack.pop();
ops[j] = p;
}
// logDebug("invoke " + operation + " (nAgs=" + numops + ")");
opResult = OperationEvaluatorFactory.evaluate(optg, ops, ec);
} else {
opResult = getEvalForPtg(ptg, ec);
}
if (opResult == null) {
throw new RuntimeException("Evaluation result must not be null");
}
// logDebug("push " + opResult);
stack.push(opResult);
}
ValueEval value = stack.pop();
if (!stack.isEmpty()) {
throw new IllegalStateException("evaluation stack not empty");
}
value = dereferenceValue(value, ec.getRowIndex(), ec.getColumnIndex());
if (value == BlankEval.instance) {