public override Literal MakeVarsAnnon(Unifier un)
{
if (annotations != null)
{
IListTerm lt = annotations;
while (!(lt.Count == 0))
{
ITerm ta = lt.GetTerm();
if (ta.IsVar())
{
lt.SetTerm(VarToReplace(ta, un));
}
else if (ta.GetType() == typeof(Structure))
{
((Structure)ta).MakeVarsAnnon(un);
}
if (lt.IsTail() && lt.GetNext().IsVar())
{
lt.SetNext(VarToReplace(lt.GetNext(), un));
break;
}
lt = lt.GetNext();
}
}
return(base.MakeVarsAnnon(un));
}
public override Literal SetAnnots(IListTerm listTerm)
{
annotations = null;
if (listTerm == null)
{
return(this);
}
IEnumerator <IListTerm> en = listTerm.ListTermIterator();
while (en.MoveNext())
{
IListTerm lt = en.Current;
if (lt.GetTerm() == null)
{
return(this);
}
AddAnnot(lt.GetTerm());
if (lt.IsTail())
{
annotations.SetTail(lt.GetTail());
return(this);
}
}
return(this);
}
public override bool HasSubsetAnnot(Literal p, Unifier u)
{
if (annotations == null)
{
return(true);
}
if (!p.HasAnnot())
{
return(false);
}
ITerm thisTail = null;
IListTerm pAnnots = p.GetAnnots().CloneLTShallow();
VarTerm pTail = pAnnots.GetTail();
ITerm pAnnot = null;
IListTerm pAnnotsTail = null;
IEnumerator <ITerm> en = pAnnots.ListTermIterator();
bool enReset = false;
IEnumerator <IListTerm> en2 = annotations.ListTermIterator(); // use this iterator to get the tail of the list
while (en2.MoveNext())
{
IListTerm lt = en2.Current;
ITerm annot = lt.GetTerm();
if (annot == null)
{
break;
}
if (lt.IsTail())
{
thisTail = lt.GetTail();
}
if (annotations.IsVar() && !enReset)
{
enReset = true;
en = pAnnots.ListTermIterator();
pAnnot = null;
}
bool ok = false;
while (true)
{
if (pAnnot != null && u.UnifiesNoUndo(annotations, pAnnot))
{
ok = true;
en.Dispose();
pAnnot = en.Current;
break;
}
else if (pAnnot != null && pAnnot.CompareTo(annot) > 0)
{
break;
}
else if (en.MoveNext())
{
pAnnot = en.Current;
}
else
{
break;
}
}
if (!ok && pTail != null)
{
if (pAnnotsTail == null)
{
pAnnotsTail = (IListTerm)u.Get(pTail);
if (pAnnotsTail == null)
{
pAnnotsTail = new ListTermImpl();
u.Unifies(pTail, pAnnotsTail);
pAnnotsTail = (IListTerm)u.Get(pTail);
}
}
pAnnotsTail.Add((ITerm)annot.Clone()); // Como uso el Clone de C# lo que clono son object que luego hay que castear...
ok = true;
}
if (!ok)
{
return(false);
}
}
if (thisTail != null)
{
u.Unifies(thisTail, pAnnots);
}
return(true);
}
