.. 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

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.. rst-class:: align-right

directive

.. index:: pair: else/0; Directive .. _directives_else_0:

else/0

Description

::

else

Starts an else branch when performing conditional compilation. The code following this directive is compiled iff the goal in the matching :ref:directives_if_1 or :ref:directives_elif_1 directive is false.

Template and modes

::

else

Examples

An example where a hypothetic application would have some limitations that the user should be made aware when running on a backend Prolog compiler with bounded arithmetic:

::

:- if(current_prolog_flag(bounded, true)).

:- initialization(
    logtalk::print_message(warning,app,bounded_arithmetic)
).

:- else.

:- initialization(
    logtalk::print_message(comment,app,unbounded_arithmetic)
).

:- endif.

.. seealso::

:ref:directives_elif_1, :ref:directives_endif_0, :ref:directives_if_1