SP_unify() #include <sicstus/sicstus.h>
int
SP_unify(SP_term_ref x,
SP_term_ref y)
Unifies two terms.
1 if they unify, and 0 otherwise.
Bear in mind that the unification may unblock some goals.
such goals are not run in the scope of SP_unify();
they remain pending until the next Prolog goal is run.