.. 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 distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

.. rst-class:: align-right

directive

.. index:: pair: set_logtalk_flag/2; Directive .. _directives_set_logtalk_flag_2:

set_logtalk_flag/2

Description

::

set_logtalk_flag(Flag, Value)

Sets local flag values. The scope of this directive is the entity or the source file containing it. For global scope, use the corresponding :ref:predicates_set_logtalk_flag_2 built-in predicate called from an :ref:directives_initialization_1 directive. For a description of the predefined compiler flags, consult the :ref:programming_flags section in the User Manual. The directive affects the compilation of all terms that follow it within the scope of the directive.

Template and modes

::

set_logtalk_flag(+atom, +nonvar)

Errors

| Flag is a variable: | instantiation_error | Value is a variable: | instantiation_error | Flag is not an atom: | type_error(atom, Flag) | Flag is neither a variable nor a valid flag: | domain_error(flag, Flag) | Value is not a valid value for flag Flag: | domain_error(flag_value, Flag + Value) | Flag is a read-only flag: | permission_error(modify, flag, Flag)

Examples

::

% turn off the compiler unknown entity warnings % during the compilation of this source file: :- set_logtalk_flag(unknown_entities, silent).

:- object(...).

% generate events for messages sent from this object:
:- set_logtalk_flag(events, allow).
...

% turn off suspicious call lint checks for the next predicate:
:- set_logtalk_flag(suspicious_calls, silent).
foo :-
    ...
:- set_logtalk_flag(suspicious_calls, warning).
...