.. index:: avltree
.. _avltree/0:

.. rst-class:: right

**object**

``avltree``
===========

AVL tree implementation of the dictionary protocol. Uses standard order to compare keys.

| **Author:** R.A.O'Keefe, L.Damas, V.S.Costa, Glenn Burgess, Jiri Spitz, and Jan Wielemaker; Logtalk port and additional predicates by Paulo Moura
| **Version:** 1:4:0
| **Date:** 2021-04-12

| **Compilation flags:**
|    ``static, context_switching_calls``


| **Implements:**
|    ``public`` :ref:`dictionaryp <dictionaryp/0>`
| **Extends:**
|    ``public`` :ref:`term <term/0>`
| **Uses:**
|    :ref:`list <list/0>`

| **Remarks:**
|    (none)

| **Inherited public predicates:**
|     :ref:`dictionaryp/0::apply/4`  :ref:`dictionaryp/0::as_curly_bracketed/2`  :ref:`dictionaryp/0::as_dictionary/2`  :ref:`dictionaryp/0::as_list/2`  :ref:`termp/0::check/1`  :ref:`dictionaryp/0::clone/3`  :ref:`dictionaryp/0::clone/4`  :ref:`dictionaryp/0::delete/4`  :ref:`dictionaryp/0::delete_max/4`  :ref:`dictionaryp/0::delete_min/4`  :ref:`termp/0::depth/2`  :ref:`dictionaryp/0::empty/1`  :ref:`termp/0::ground/1`  :ref:`dictionaryp/0::insert/4`  :ref:`dictionaryp/0::intersection/2`  :ref:`dictionaryp/0::intersection/3`  :ref:`dictionaryp/0::keys/2`  :ref:`dictionaryp/0::lookup/2`  :ref:`dictionaryp/0::lookup/3`  :ref:`dictionaryp/0::map/2`  :ref:`dictionaryp/0::map/3`  :ref:`dictionaryp/0::max/3`  :ref:`dictionaryp/0::min/3`  :ref:`termp/0::new/1`  :ref:`dictionaryp/0::next/4`  :ref:`termp/0::numbervars/1`  :ref:`termp/0::numbervars/3`  :ref:`termp/0::occurs/2`  :ref:`dictionaryp/0::previous/4`  :ref:`termp/0::singletons/2`  :ref:`dictionaryp/0::size/2`  :ref:`termp/0::subsumes/2`  :ref:`termp/0::subterm/2`  :ref:`dictionaryp/0::update/3`  :ref:`dictionaryp/0::update/4`  :ref:`dictionaryp/0::update/5`  :ref:`termp/0::valid/1`  :ref:`dictionaryp/0::values/2`  :ref:`termp/0::variables/2`  :ref:`termp/0::variant/2`  :ref:`termp/0::varnumbers/2`  :ref:`termp/0::varnumbers/3`  

.. contents::
   :local:
   :backlinks: top

Public predicates
-----------------

(no local declarations; see entity ancestors if any)

Protected predicates
--------------------

(no local declarations; see entity ancestors if any)

Private predicates
------------------

(no local declarations; see entity ancestors if any)

Operators
---------

(none)

.. seealso::

   :ref:`bintree <bintree/0>`, :ref:`rbtree <rbtree/0>`

