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yap-6.3/Logtalk/examples/msglog/msglog.lgt
pmoura b697f3d34e Logtalk 2.29.3 files.
git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@1781 b08c6af1-5177-4d33-ba66-4b1c6b8b522a
2007-01-24 11:01:56 +00:00

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:- object(msglog,
implements(monitoring)).
:- info([
version is 1.1,
author is 'Paulo Moura',
date is 2007/01/13,
comment is 'Monitor for recording, replaying, and saving user messages.']).
:- public(record/0).
:- mode(record, one).
:- info(record/0,
[comment is 'Starts recording messages.']).
:- public(stop/0).
:- mode(stop, one).
:- info(stop/0,
[comment is 'Stops recording messages.']).
:- public(replay/0).
:- mode(replay, one).
:- info(replay/0,
[comment is 'Replays all recorded messages.']).
:- public(print/0).
:- mode(print, one).
:- info(print/0,
[comment is 'Prints recorded messages, one per line.']).
:- public(erase/0).
:- mode(erase, one).
:- info(erase/0,
[comment is 'Erases recorded messages.']).
:- private(log_/2).
:- dynamic(log_/2).
:- mode(log_(+object, +nonvar), zero_or_more).
:- info(log_/2,
[comment is 'Table of recorded messages.',
argnames is ['Object', 'Message']]).
record :-
self(Self),
abolish_events(_, _, _, _, Self),
define_events(before, _, _, user, Self).
stop :-
self(Self),
abolish_events(_, _, _, _, Self).
replay :-
self(Self),
abolish_events(_, _, _, _, Self),
forall(::log_(Object, Message), {Object::Message}).
print :-
forall(
::log_(Object, Message),
(writeq(Object), write('::'), writeq(Message), write('.'), nl)).
erase :-
::retractall(log_(_, _)).
before(Object, Message, _) :-
self(Self),
(Self = Object ->
true
;
::assertz(log_(Object, Message))).
:- end_object.