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Include Paulo Moura's Logtalk OO LP system

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git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@53 b08c6af1-5177-4d33-ba66-4b1c6b8b522a
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2001-06-06 19:40:57 +00:00
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=================================================================
Logtalk - Object oriented extension to Prolog
Release 2.8.4
Copyright (c) 1998-2001 Paulo Moura. All Rights Reserved.
=================================================================
% some queries using the time and date parametric objects:
| ?- date(Year, Month, Day)::today.
Year = 2000
Month = 8
Day = 15
Yes
| ?- date(Year, _, _)::(today, leap_year).
Year = 2000
yes
| ?- time(Hours, Mins, Secs)::now.
Hours = 13
Mins = 52
Secs = 42
Yes