..
   This file is part of Logtalk <https://logtalk.org/>
   SPDX-FileCopyrightText: 1998-2025 Paulo Moura <pmoura@logtalk.org>
   SPDX-License-Identifier: Apache-2.0

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

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   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
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.. rst-class:: align-right

**directive**

.. index:: pair: dynamic/0; Directive
.. _directives_dynamic_0:

``dynamic/0``
=============

Description
-----------

::

   dynamic

Declares an entity and its contents as dynamic. Dynamic entities can be
abolished at runtime.

As entities created at runtime (using the :ref:`predicates_create_object_4`,
:ref:`predicates_create_protocol_3`, and :ref:`predicates_create_category_4`
built-in predicates) are always dynamic, this directive is only necessary in
the rare cases where we want to define dynamic entities in source files.

.. warning::

   Some backend Prolog compilers declare the atom ``dynamic`` as an operator
   for a lighter syntax, forcing writing this atom between parenthesis
   when using this directive.

Template and modes
------------------

::

   dynamic

Examples
--------

::

   :- dynamic.

.. seealso::

   :ref:`directives_dynamic_1`,
   :ref:`predicates_object_property_2`,
   :ref:`predicates_protocol_property_2`,
   :ref:`predicates_category_property_2`
