Method emptySteps

basex-core/src/main/java/org/basex/query/expr/path/Path.java:427–438

Checks if the path contains empty steps. @param rt root at compile time (can be null) @return result of check

(final Expr rt)

   * @return result of check
   */
  private boolean emptySteps(final Expr rt) {
    if(rt != null) {
      Expr prev = rt;
      for(final Expr step : steps) {
        final SeqType seqType = prev.seqType();
        if(seqType.type instanceof NodeType && step instanceof final Step stp &&
            stp.empty(seqType)) return true;
        prev = step;
      }
    }
    return false;
  }

  /**
   * Checks if a path can be evaluated iteratively (i.e., if all results will be in distinct