Method test

basex-core/src/main/java/org/basex/query/func/fn/FnEmpty.java:27–34

(final QueryContext qc, final InputInfo ii, final long pos)

  }

  @Override
  public boolean test(final QueryContext qc, final InputInfo ii, final long pos)
      throws QueryException {
    final Expr input = arg(0);
    return input.seqType().zeroOrOne() ?
      input.item(qc, info) == Empty.VALUE :
      input.iter(qc).next() == null;
  }

  @Override
  protected final void simplifyArgs(final CompileContext cc) throws QueryException {