public object Execute(VariableContext context = null)
{
var leftVal = this.Left.Execute(context);
var rightVal = this.Right.Execute(context);
if (leftVal is Variable l && rightVal is Variable r)
{
if (l.ValueType != r.ValueType)
{
throw new FEELException("The variable type does not match for the arithmetic action");
}
switch (l.ValueType)
{
case DataTypeEnum.Decimal:
return(new Variable(l.NumericVal - r.NumericVal));
case DataTypeEnum.Date:
case DataTypeEnum.DateTime:
case DataTypeEnum.Time:
case DataTypeEnum.YearMonthDuration:
case DataTypeEnum.DayTimeDuration:
return(DateAndTimeHelper.Subtract(l, r));
default:
throw new FEELException("Failed to perform subtraction to incorrect FEEL type");
}
}
throw new FEELException("Failed to perform subtraction due to values not being a variable");
}