private object MapRel(string left, string oper, string right)
{
//TODO: Check the expression on the right
if (!OperChecker.IsRelOper(oper) || !Check.IsProp(left))
{
throw new Exception("Invalid relational operation");
}
var leftNode = PropChecker.GetNode(left);
var rightNode = Check.GetNode(right);
return(OperChecker.GetRelationalNode(leftNode, oper, rightNode));
}
public static Expression GetNode(string token)
{
object constant = IsBool(token) ? Cast <bool>(token, bool.TryParse)
: IsInt(token) ? Cast <int>(token, int.TryParse)
: IsFloat(token) ? Cast <float>(token, float.TryParse)
: IsChar(token) ? Cast <char>(token, char.TryParse)
: IsDate(token) ? Cast <DateTime>(token, DateTime.TryParse)
: IsProp(token) ? PropChecker.GetProp(token)
: GetString(token);
if (constant == null)
{
throw new Exception($"Invalid constant value {token}");
}
return(ConstantExpression.Constant(constant));
}
public static bool IsProp(string value) => PropChecker.IsProp(value);
