@Override
public Item item(final QueryContext qc, final InputInfo ii) throws QueryException {
final byte[] s;
if (exprs.length == 0) {
final Item it = ctxValue(qc).item(qc, info);
if (it instanceof FItem) throw FISTRING_X.get(ii, it.type);
s = it == null ? Token.EMPTY : it.string(ii);
} else {
s = toEmptyToken(arg(0, qc), qc);
}
return Int.get(Token.length(s));
}
@Override
public Item item(final QueryContext qc, final InputInfo ii) throws QueryException {
ctxValue(qc);
return Int.get(qc.focus.pos);
}
@Override
Item key(final QueryContext ctx, final int i) {
return Int.get(i);
}