private Rule(OperationCode op, Expression left, Expression right, ParameterExpression pe, ClauseCode cl)
{
LeftExp = left;
RightExp = right;
CombinedExp = left.Operate(right, op);
ParamExp = pe;
Clause = cl;
}
internal Rule(OperationCode op, Tuple <string, Type> keyValue, string property, ClauseCode clause)
{
Operator = op;
TypeValuePair = (keyValue.Item1, keyValue.Item2);
Property = property;
Clause = clause;
ParamExp = Expression.Parameter(typeof(T), "x");
var typeValue = Convert.ChangeType(TypeValuePair.Item1, TypeValuePair.Item2);
RightExp = Expression.Constant(typeValue);
LeftExp = Left(ParamExp, property);
CombinedExp = Combined(LeftExp, RightExp);
}