message_prefix_stream/4 — The Logtalk Handbook v3.47.0 documentation

# `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 component. This method is declared in the logtalk built-in object as a public, multifile, and dynamic predicate.

## 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).

See also

message_hook/4, message_tokens//2, print_message/3, print_message_tokens/3, print_message_token/4, ask_question/5, question_hook/6, question_prompt_stream/4