public static MjuFormula ExistTrans(MjuFormula formula)
{
if (formula == null)
throw new ArgumentNullException ("formula");
return new MjuFormula (formula, null, MjuOperator.MJU_EXISTS, null);
}
private MjuFormula(MjuFormula left, MjuFormula right, MjuOperator op, string name)
{
this.Left = left;
this.Right = right;
this.Operator = op;
this.Name = name;
}
public static MjuFormula And(MjuFormula left, MjuFormula right)
{
if (left == null)
throw new ArgumentNullException ("left");
if (right == null)
throw new ArgumentNullException ("right");
return new MjuFormula (left, right, MjuOperator.LOGIC_AND, null);
}
public static MjuFormula LeastFixedPoint(MjuFormula formula, string var)
{
if (formula == null)
throw new ArgumentNullException ("formula");
if (var == null)
throw new ArgumentNullException ("var");
return new MjuFormula (formula, Var (var), MjuOperator.MJU_LFP, null);
}
public static MjuFormula Not(MjuFormula formula)
{
if (formula == null)
throw new ArgumentNullException ("formula");
switch (formula.Operator) {
case MjuOperator.TRUE :
return FALSE;
case MjuOperator.FALSE :
return TRUE;
case MjuOperator.LOGIC_NOT :
return formula.Left;
case MjuOperator.LOGIC_AND :
return new MjuFormula (Not (formula.Left), Not (formula.Right), MjuOperator.LOGIC_OR, null);
case MjuOperator.LOGIC_OR :
return new MjuFormula (Not (formula.Left), Not (formula.Right), MjuOperator.LOGIC_AND, null);
case MjuOperator.MJU_ALL :
return ExistTrans (Not (formula.Left));
case MjuOperator.MJU_EXISTS :
return AllTrans (Not (formula.Left));
case MjuOperator.MJU_LFP :
return GreatestFixedPoint (Not (formula.Left), formula.Right.Name);
case MjuOperator.MJU_GFP :
return LeastFixedPoint (Not (formula.Left), formula.Right.Name);
case MjuOperator.VARIABLE :
return formula;
default :
return new MjuFormula (formula, null, MjuOperator.LOGIC_NOT, null);
}
}
