RE: [boost] discrete_set class

From: Roman Yakovenko (romany_at_[hidden])
Date: 2002-08-27 09:14:56

You wrote: 
> -----Original Message-----
> From: spamjunk_at_[hidden] [mailto:spamjunk_at_[hidden]]
> Sent: Tuesday, August 27, 2002 2:47 PM
> To: boost_at_[hidden]
> Subject: RE: [boost] discrete_set class
> 
> 
> Ok, this is my fault.  As Joel has pointed out, I neglected to provide
> documentation.  I apologize and will upload some as soon as I 
> can.  For now, the
> problem with your examples is the class expects the values of 
> the elements to be
> in the range [LO, HI].  You are trying to use values outside 
> the range.  My
> understanding of C++ is that it is undefined behavior to 
> convert an int to an
> enum when it is outside the enum's range.

I agree with you. But explain me smth, please. 
In database table I keep integers( numeric) values.
I have to construct my objects from table record. 
I have to test whether value from database is valid enum or not.
I build discrete_set that contains all enums. (They don't have to be sequential, very important to me).
And now I am going to test using contain function. At first I must use static_cast to convert
value to enum(I don't like it) and then I have to test. 
What is  wrong with this scenario. And if your class doesn't give a solution for this
problem, than what problem you are trying to solve?

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Roman