enum question

[pheres]

Hi,

I have a namespace and an enum in it:

nmamespace dem
{

enum User_types
{
        ....
	EntityManagerStatus = 1000,
	MissionDescription = 1010,
	GeneralEntityData = 1020,
	ImCmdQueue = 1030
        ....
}

}

Basically that are ID's describing classes. I need that while serializing object data to push it over network to indicate the types.
That classes are loaded from dll's.
Now that I want to do is to expand that enum dynamically while loading an new dll.
I guess that's not possible, isn't it?
How would you work around that, so you still got such global identifiers which could expanded dynamically?

Thanks for your ideas!

[Bench82]

Unfortunately not, since enums are determined at compile time. I would store the values in a map instead. something like this perhaps -

    std::map< std::string, int > User_types;

    User_types.insert( std::make_pair< std::string, int >( "EntityManagerStatus", 1000 ) );
    User_types.insert( std::make_pair< std::string, int >( "MissionDescription", 1010 ) );
    User_types.insert( std::make_pair< std::string, int >( "GeneralEntityData", 1020 ) );

[pheres]

Sounds reasonable so far.
assuming I need both a) int->string as well as b) string->int.
For the above map a) O(n) and b) has O(log n).

other options that come to my mind are 2 separate maps, so a) and b) have O(log n) but the expense to attend 2 containers and hold them in a consistence state.
Or a vector<string> that would get me O(1) for a) and O(n) for b)

Are there other options?