Method postAccept

fe/src/main/java/org/apache/impala/common/TreeNode.java:253–257

A variant of visitor pattern accept method that do post-order traversal instead of pre-order.

(Visitor<C> visitor)

   * of pre-order.
   */
  @SuppressWarnings("unchecked")
  public <C extends TreeNode<NodeType>> void postAccept(Visitor<C> visitor) {
    for (NodeType p : children_) p.postAccept(visitor);
    visitor.visit((C) this);
  }
}