.. 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

built-in method

.. index:: pair: print_message_token/4; Built-in method .. _methods_print_message_token_4:

print_message_token/4

Description

::

print_message_token(Stream, Prefix, Token, Tokens)

User-defined hook method for printing a message token, declared in the :ref:`logtalk apis:logtalk/0` built-in object as a public, multifile, and dynamic predicate. It allows the user to intercept the printing of a message token. This hook method is automatically called by the :ref:methods_print_message_tokens_3 built-in method for each token.

Modes and number of proofs

::

print_message_token(@stream_or_alias, @atom, @nonvar, @list(nonvar)) - zero_or_one

Errors

(none)

Examples

::

:- multifile(logtalk::print_message_token/4). :- dynamic(logtalk::print_message_token/4).

% ignore all flush tokens logtalk::print_message_token(_Stream, _Prefix, flush, _Tokens).

.. seealso::

:ref:methods_message_hook_4, :ref:methods_message_prefix_stream_4, :ref:methods_message_tokens_2, :ref:methods_print_message_3, :ref:methods_print_message_tokens_3, :ref:methods_ask_question_5, :ref:methods_question_hook_6, :ref:methods_question_prompt_stream_4