.. 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: message_prefix_stream/4; Built-in method .. _methods_message_prefix_stream_4:

message_prefix_stream/4

Description

::

message_prefix_stream(Kind, Component, Prefix, Stream)

User-defined hook method for specifying the default prefix and stream for printing a message for a given kind and :term:component. This method is declared in the :ref:`logtalk apis:logtalk/0` built-in object as a public, multifile, and dynamic predicate.

The prefix is printed for each line in the list of tokens generated by the message tokenization (new lines are specified using the nl token; see the documentation of the :ref:`logtalk apis:logtalk/0` built-in object for details).

Modes and number of proofs

::

message_prefix_stream(?nonvar, ?nonvar, ?atom, ?stream_or_alias) - zero_or_more

Errors

(none)

Examples

::

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

logtalk::message_prefix_stream(information, core, '% ', user_output).

.. seealso::

:ref:methods_message_hook_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