..
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   Copyright 1998-2021 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.
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       http://www.apache.org/licenses/LICENSE-2.0

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.. index:: pair: built_in/0; Directive
.. _directives_built_in_0:

``built_in/0``
==============

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

::

   built_in

Declares an entity as built-in. Built-in entities must be static and cannot
be redefined once loaded. This directive is used in the pre-defined protocols,
categories, and objects that are automatically loaded at startup.

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

::

   built_in

Examples
--------

::

   :- built_in.
