public object Math2Value(CLS_Content env, char code, object left, CLS_Content.Value right, out CLType returntype)
{
returntype = typeof(string);
if (code == '+')
{
if (right.value == null)
{
return (string)left + "null";
}
else
{
return (string)left + right.value.ToString();
}
}
throw new NotImplementedException();
}