protected override object EvaluationInternal(IDictionary <object, object> parameters)
{
var operand = Operand.Evaluation(parameters);
if (operand == null)
{
return(0);
}
if (operand == ExpressionConstants.Unevaluatable)
{
return(ExpressionConstants.Unevaluatable);
}
Number num = null;
if (operand is string)
{
num = ExprEvalUtils.String2Number((string)operand);
}
else
{
num = (Number)operand;
}
return(ExprEvalUtils.Calculate(this, num));
}
protected override object EvaluationInternal(IDictionary <object, object> parameters)
{
var left = LeftOprand.Evaluation(parameters);
var right = rightOprand.Evaluation(parameters);
if (left == null || right == null)
{
return(null);
}
if (left == ExpressionConstants.Unevaluatable || right == ExpressionConstants.Unevaluatable)
{
return(ExpressionConstants.Unevaluatable);
}
var pair = ExprEvalUtils.ConvertNum2SameLevel(left, right);
return(ExprEvalUtils.Calculate(this, pair.Key, pair.Value));
}