prolog_load_file(+Spec,
+Options)Load a single object. If this call succeeds, load_files/2
assumes the action has been taken care of. This hook is only called if Options
does not contain the stream(Input) option. The hook must be
defined in the module user.
This can be used to load from unusual places as well as dealing with
Prolog code that is not represented as a Prolog source text (for example
some binary representation). For example, library library(http/http_load)
loads Prolog directly from an HTTP server. See also
prolog:open_source_hook/3,
which merely allows for changing how a physical file is opened.
