String contents = stack.pop();
stack.push ("(" + contents + ")");
continue;
}
if (ptg instanceof AttrPtg) {
AttrPtg attrPtg = ((AttrPtg) ptg);
if (attrPtg.isOptimizedIf() || attrPtg.isOptimizedChoose() || attrPtg.isGoto()) {
continue;
}
if (attrPtg.isSpace()) {
// POI currently doesn't render spaces in formulas
continue;
// but if it ever did, care must be taken:
// tAttrSpace comes *before* the operand it applies to, which may be consistent
// with how the formula text appears but is against the RPN ordering assumed here
}
if (attrPtg.isSemiVolatile()) {
// similar to tAttrSpace - RPN is violated
continue;
}
if (attrPtg.isSum()) {
String[] operands = getOperands(stack, attrPtg.getNumberOfOperands());
stack.push(attrPtg.toFormulaString(operands));
continue;
}
throw new RuntimeException("Unexpected tAttr: " + attrPtg.toString());
}
if (ptg instanceof WorkbookDependentFormula) {
WorkbookDependentFormula optg = (WorkbookDependentFormula) ptg;
stack.push(optg.toFormulaString(book));