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Logtalk - Object oriented extension to Prolog
Release 2.25.0
Copyright (c) 1998-2005 Paulo Moura. All Rights Reserved.
% start by loading the "assignvars" category:
| ?- logtalk_load(library(assignvars)).
...
% now you are ready for loading the example:
| ?- logtalk_load(assignvars(loader)).
% rectangle example:
?- rectangle(2, 3, _)::(init, position(X0, Y0), move(3, 7), position(X1, Y1), move(2, 5), position(X2, Y2)).
X0 = 0
Y0 = 0
X1 = 3
Y1 = 7
X2 = 2
Y2 = 5
Yes
% finite state machine example:
| ?- fsm(T, I, F), fsm(T, I, F)::recognise([0,1,1,2,1,2,0]).
red-0-red
red-1-green
green-1-yellow
yellow-2-red
green-2-red
T = [red-0-red, red-1-green, red-2-red, yellow-0-red, yellow-1-green, yellow-2-red, green-0-yellow, ... -... -yellow, ... -...]
I = red
F = [red]
| ?- fsm(T, I, F), !, fsm(T, I, F)::recognise([0,1,1,2,1,2,1,0]).
green-0-yellow
backtracking...
No
