public override IAF substitute(SubstitutionEC s)
{
var itT = (from it in ftt select it.substitute(s)).ToArray();
if (itT.All(it => it.isGround))
{
return(s.universe.makeGAF(predicate, from it in itT select it as GT));
}
else
{
return(s.universe.makeFAF(predicate, s.universe.makeFTT(itT)));
}
}
internal SubstitutionEC tryCombine(SubstitutionEC c)
{
Debug.Assert(universe == c.universe);
var t = new Dictionary <LVar, IT>(map);
foreach (var p in c.map)
{
if (t.ContainsKey(p.Key) && !t[p.Key].Equals(p.Value))
{
return(null);
}
else
{
t[p.Key] = p.Value;
}
}
return(new SubstitutionEC(universe, isGoal, t));
}
public GL gSubstitute(SubstitutionEC s)
{
return(this);
}
public override IL substitute(SubstitutionEC s)
{
return(this);
}
public override IL substitute(SubstitutionEC s)
{
return(s.universe.makeIL(faf.substitute(s), polarity, s.isGoal));
}
public override IT substitute(SubstitutionEC s)
{
return(s.variables.Contains(variable) ? s[variable] : this);
}
public override IT substitute(SubstitutionEC s)
{
return(substitute(s.universe, from it in ftt select it.substitute(s), s.isGoal));
}
public abstract IL substitute(SubstitutionEC s);
