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![]() | Pack logtalk -- logtalk-3.81.0/manuals/_sources/refman/methods/message_hook_4.rst.txt |
.. 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
built-in method
.. index:: pair: message_hook/4; Built-in method .. _methods_message_hook_4:
::
message_hook(Message, Kind, Component, Tokens)
User-defined hook method for intercepting printing of a message, declared
in the :ref:`logtalk apis:logtalk/0` built-in object as a public,
multifile, and dynamic predicate. This hook method is automatically called
by the :ref:methods_print_message_3
method. When the call
succeeds, the print_message/3 method assumes that the message have
been successfully printed.
::
message_hook(@nonvar, @nonvar, @nonvar, @list(nonvar))
- zero_or_one
(none)
::
:- multifile(logtalk::message_hook/4). :- dynamic(logtalk::message_hook/4).
% print silent messages instead of discarding them as default
logtalk::message_hook(_, silent, core, Tokens)
:-
logtalk::message_prefix_stream(silent, core, Prefix, Stream)
,
logtalk::print_message_tokens(Stream, Prefix, Tokens)
.
.. seealso::
:ref:methods_message_prefix_stream_4
,
:ref:methods_message_tokens_2
,
:ref:methods_print_message_3
,
:ref:methods_print_message_tokens_3
,
:ref:methods_print_message_token_4
,
:ref:methods_ask_question_5
,
:ref:methods_question_hook_6
,
:ref:methods_question_prompt_stream_4