dif
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, XVM, 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 coroutining library.
API documentation
Open the ../../apis/library_index.html#dif link in a web browser.
Loading
To load all entities in this library, load the loader.lgt file:
| ?- logtalk_load(dif(loader)).
Testing
To test this library predicates, load the tester.lgt file:
| ?- logtalk_load(dif(tester)).
Usage
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
]).