/// <summary>
/// This routine will actually execute an operation and return its value
/// </summary>
/// <param name="op">Operator Information</param>
/// <param name="left">left operand</param>
/// <param name="right">right operand</param>
/// <returns>v1 (op) v2</returns>
public static object PerformBinaryOp(BinaryOperator op, object left, object right)
{
IEvaluator tv = left as IEvaluator;
if (tv != null)
{
left = tv.Evaluate();
}
try {
switch (op.OperatorString) // short circuit evaluation 1/6/16
{
case "AND":
if (Convert.ToBoolean(left, CultureInfo.CurrentCulture))
{
tv = right as IEvaluator;
if (tv != null)
{
right = tv.Evaluate();
}
if (Convert.ToBoolean(right, CultureInfo.CurrentCulture))
{
return(true);
}
}
return(false);
case "OR":
if (Convert.ToBoolean(left, CultureInfo.CurrentCulture))
{
return(true);
}
else
{
tv = right as IEvaluator;
if (tv != null)
{
right = tv.Evaluate();
}
if (Convert.ToBoolean(right, CultureInfo.CurrentCulture))
{
return(true);
}
}
return(false);
}
tv = right as IEvaluator;
if (tv != null)
{
right = tv.Evaluate();
}
return(op.ExecuteOperator(left, right));
}
catch (Exception ex) when(ex is InvalidCastException || ex is FormatException || ex is ArgumentException || ex is OverflowException)
{
throw new FormatException(string.Format(
"Operator '{0}' cannot be applied to objects of type '{1}' and '{2}'",
op.OperatorString, GetTypeName(right), GetTypeName(left)
));
}
}