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, SICStus Prolog, SWI-Prolog, Trealla Prolog, XSB, XVM, 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 this library, load its loader.lgt file:

| ?- logtalk_load(dif(loader)).

Testing

To test this library, load its 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
]).