1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
|
=================================================================
Logtalk - Object oriented extension to Prolog
Release 2.27.1
Copyright (c) 1998-2006 Paulo Moura. All Rights Reserved.
=================================================================
% start by loading the example:
| ?- logtalk_load(parametric(loader)).
...
% 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 = 2002
yes
| ?- time(Hours, Mins, Secs)::now.
Hours = 13
Mins = 52
Secs = 42
Yes
| ?- R = rectangle(W, H, X, Y), R::init, R::move(3, 4, NR), NR::position(X2, Y2).
R = rectangle(2, 1, 0, 0)
W = 2
H = 1
X = 0
Y = 0
NR = rectangle(2, 1, 3, 4)
X2 = 3
Y2 = 4
Yes
|
