public override Predicate exec(Prolog engine)
{
Term a1, a2, a3;
a1 = engine.aregs[1].Dereference();
a2 = engine.aregs[2].Dereference();
a3 = engine.aregs[3].Dereference();
Predicate cont = engine.cont;
if (!s1.Unify(a1, engine.trail))
{
return(engine.fail());
}
return(cont);
}
public override Predicate exec(Prolog engine)
{
Term a1, a2, a3;
Predicate p1, p2;
a1 = engine.aregs[1].Dereference();
a2 = engine.aregs[2].Dereference();
Predicate cont = engine.cont;
if (!s1.Unify(a2, engine.trail))
{
return(engine.fail());
}
a3 = engine.makeVariable();
p1 = new Predicates.dollar_cut_1(a3, cont);
p2 = new Predicates.dollar_lessOrEqual_2(a1, s2, p1);
return(new Predicates.dollar_getLevel_1(a3, p2));
}