print_message_token/4 — The Logtalk Handbook v3.47.0 documentation

# `print_message_token/4`

## Description

    print_message_token(Stream, Prefix, Token, Tokens)

User-defined hook method for printing a message token, declared in the logtalk 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 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).

See also

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