c3e3a72583
git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@1164 b08c6af1-5177-4d33-ba66-4b1c6b8b522a
63 lines
1.3 KiB
Plaintext
63 lines
1.3 KiB
Plaintext
=================================================================
|
|
Logtalk - Object oriented extension to Prolog
|
|
Release 2.21.3
|
|
|
|
Copyright (c) 1998-2004 Paulo Moura. All Rights Reserved.
|
|
=================================================================
|
|
|
|
|
|
% start by loading the example:
|
|
|
|
| ?- logtalk_load(loader).
|
|
...
|
|
|
|
|
|
% both cars provide the same interface, declared in the protocol
|
|
% that is implemented by the categories imported by each object:
|
|
|
|
| ?- sedan::current_predicate(P).
|
|
|
|
P = reference/1 ;
|
|
P = capacity/1 ;
|
|
P = cylinders/2 ;
|
|
P = horsepower_rpm/2 ;
|
|
P = bore_stroke/2 ;
|
|
P = fuel/1
|
|
yes
|
|
|
|
|
|
| ?- coupe::current_predicate(P).
|
|
|
|
P = reference/1 ;
|
|
P = capacity/1 ;
|
|
P = cylinders/2 ;
|
|
P = horsepower_rpm/2 ;
|
|
P = bore_stroke/2 ;
|
|
P = fuel/1 ;
|
|
yes
|
|
|
|
|
|
% the sedan engine properties are the ones defined in the corresponding
|
|
% imported category (classic):
|
|
|
|
| ?- sedan::(reference(Name), cylinders(Cylinders), horsepower_rpm(HP, RPM)).
|
|
|
|
Name = 'M180.940'
|
|
Cylinders = 6
|
|
HP = 94
|
|
RPM = 4800
|
|
yes
|
|
|
|
|
|
% the coupe engine properties are the ones defined in the corresponding
|
|
% imported category (sport) plus the ones inherited from the top category
|
|
% (classic) which are not overridden:
|
|
|
|
| ?- coupe::(reference(Name), cylinders(Cylinders), horsepower_rpm(HP, RPM)).
|
|
|
|
Name = 'M180.941'
|
|
Cylinders = 6
|
|
HP = 110
|
|
RPM = 5000
|
|
yes
|