internal Expression GetExpression(ParameterExpression parameter)
{
var lhs = Lhs.GetExpression(parameter);
if (Rhs is null) return lhs;
var rhs = Rhs.GetExpression(parameter);
Expression expression = null;
switch (Gate)
{
case LogicGate.And:
expression = Expression.And(lhs, rhs);
break;
case LogicGate.Or:
expression = Expression.Or(lhs, rhs);
break;
default:
break;
}
return expression;
}