dif object provides a portable abstraction over how the
dif/2 predicate is made available by the supported backend Prolog
systems that implement it (B-Prolog, ECLiPSe, LVM, SICStus Prolog,
SWI-Prolog, Trealla Prolog, XSB, and YAP).
Calls to the library predicates are inlined when compiled with the
optimize flag turned on. In this case, there is no overhead compared
with calling the abstracted predicate directly.
See also the
Open the ../../docs/library_index.html#dif link in a web browser.
To load all entities in this library, load the
| ?- logtalk_load(dif(loader)).
To test this library predicates, load the
| ?- logtalk_load(dif(tester)).
Load this library from your application loader file. To call the
dif/1-2 predicates using implicit message sending, add the following
directive to any object or category calling the predicates:
:- uses(dif, [ dif/2, dif/1 ]).