The 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, Scryer Prolog, 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 predicates directly.

API documentation

Open the ../../docs/library_index.html#dif link in a web browser.


To load all entities in this library, load the loader.lgt file:

| ?- logtalk_load(dif(loader)).


To test this library predicates, load the tester.lgt file:

| ?- logtalk_load(dif(tester)).