..
   This file is part of Logtalk <https://logtalk.org/>  
   SPDX-FileCopyrightText: 1998-2024 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

   Unless required by applicable law or agreed to in writing, software
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   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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.. rst-class:: align-right

**built-in method**

.. index:: pair: eos//0; Built-in method
.. _methods_eos_0:

``eos//0``
==========

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

::

   eos

This non-terminal matches the end-of-input. It is implemented by
checking that the implicit difference list unifies with ``[]-[]``.

Modes and number of proofs
--------------------------

::

   eos - zero_or_one

Errors
------

(none)

Examples
--------

::

   abc --> a, b, c, eos.

.. seealso::

   :ref:`methods_call_1`,
   :ref:`methods_phrase_1`,
   :ref:`methods_phrase_2`,
   :ref:`methods_phrase_3`
