@Override
FItem evalFunc(final QueryContext ctx) throws QueryException {
final int ar = expr.length - 1;
final Item it = checkItem(expr[ar], ctx);
if (!(it instanceof FItem)) throw INVFUNCITEM.get(info, it.type);
final FItem fit = (FItem) it;
if (fit.arity() != ar) throw INVARITY.get(info, fit, ar);
if (!sc.mixUpdates && updating != fit.annotations().contains(Ann.Q_UPDATING))
throw (updating ? UPFUNCNOTUP : UPFUNCUP).get(info);
return fit;
}
/**
* Performs the test function.
*
* @param ctx query context
* @return resulting value
* @throws QueryException query exception
*/
private Item test(final QueryContext ctx) throws QueryException {
final Unit unit = new Unit(ctx, info);
if (expr.length == 0) return unit.test(sc);
final ArrayList<StaticFunc> funcs = new ArrayList<>();
final Iter ir = ctx.iter(expr[0]);
for (Item it; (it = ir.next()) != null; ) {
final FItem fi = checkFunc(it, ctx);
if (fi.funcName() != null) {
final StaticFunc sf = ctx.funcs.get(fi.funcName(), fi.arity(), null, true);
if (sf != null) funcs.add(sf);
}
}
return unit.test(sc, funcs);
}