Subj : Re: enumerated variables - how to coerce them to anything else than an Int ?
To   : borland.public.cpp.borlandcpp
From : John F\(dot\)
Date : Mon Oct 10 2005 11:08 pm


"Ed Mulroy" <dont_email_me@bitbuc.ket> schrieb im Newsbeitrag 
news:434ac54c$1@newsgroups.borland.com...
> In Win32 an int IS a long.  They are both 4 byte signed values.
>
> The C++ Language spec states that the conversion between an int and an 
> enum is intrinsic so, be it an int or a long, assignment of anything, even 
> if it is not one of the enum values is possible.
>
> The way I would try to limit what can be put into it is to define a class 
> and overload the basic operations, checking for valid enum values and 
> doing something for invalid ones.  Then I would use that instead of the 
> enum.
>
> You appear to be using an existing class.  You might design a class which 
> inherits from that existing one and which makes your LongEnum interface 
> visible instead of the enum one.  You will then be able to do whatever you 
> want with it.
>
> .  Ed

Hi Ed,

Thats the correct way... the question is if he still needs arbitrary longs 
to be stored in those members. If not, he can do anything...

What I suspect is that Rudy wants sth like

long X will then be:
enum MyLong X;
....
X=123456789; //should be able to store it.
X=default;

so he would need X to take 4 bytes. It can be done the dirty way (that 
wouldn't waste many kBs of Memory...). (at least with OW1.3 [gives a warning 
on that...], I will check with BC as soon as possible maybe at weekend)

regards
John

.