discuss.visual-prolog.com

Posted: **13 Oct 2017 5:51**

I have the following structure according to the prolog notes:

class backend
 
    open resourceIdentifiers
 
 domains   
 
...
 
facts
 
....
 
predicates
 
end class backend

Code: Select all

implement backend
 
 
clauses
 
...

in a backend.pack file:

and I receive the following error:

e154 The section 'facts' is not allowed here backend.pack

where can I position my facts declarations?

(I had them before inside the implementation and I was getting other errors)

Posted: **13 Oct 2017 7:58**

Facts can only be declared inside an implementation. I.e. here

Code: Select all

implement backend
% here you can have facts
end implement backend

This means that what is know as global database/facts in Vip5x does no longer exist.

Also look at Migration from Visual Prolog 5.