Re: [Boost-users] RTTI for VC 6

From: Victor A. Wagner Jr. (vawjr_at_[hidden])
Date: 2004-08-15 02:40:11

to put it bluntly, it's not boost, it VC++6.0
(the plethora of errors)
upgrading would save you and a lot of others a lot of problems
At Saturday 2004-08-14 18:15, you wrote:
>----- Original Message -----
>From: "Peter Dimov" <pdimov_at_[hidden]>
>To: <boost-users_at_[hidden]>
>Sent: Wednesday, August 11, 2004 3:40 AM
>Subject: Re: [Boost-users] RTTI for VC 6
>
>
> > Samuel wrote:
> > > VC 6 has an option for Run-Time Type Information (RTTI) that is
> > > normally off. I was able to compile and execute a sample program that
> > > had a problem. I noticed that Boost uses RTTI (such as the
> > > dynamic_cast operator), so I checked to see if the option was on; it
> > > was not. I turned the option on and the program worked.
> > >
> > > That problem is probably a known problem, but something such as the
> > > following can be added somewhere to not allow a VC 6 program to even
> > > compile if the RTTI option is off. I think it could make things a
> > > little easier for some beginners.
> > >
> > > #  if !defined(_CPPRTTI)
> > > #      error "Boost requires use of RTTI"
> > > #  endif
> >
> > Some parts of Boost need RTTI, some do not. It is not reasonable to reject
>a
> > program that doesn't ever invoke a dynamic_cast on a polymorphic type
>(which
> > is a level 1 warning IIRC) just because it happens to include a boost
> > header.
>
>I don't understand this. I did not reply earlier since I assumed it does not
>matter, and I still assume that whoever might be concerned about this can be
>the one to decide the relevance. However if you are saying that a warning
>will result from not using dynamic_cast then you did not read my message.
>The problem is that the compiled program did not work; it produced
>unexpected results (I forget the details). The unexpected results could
>easily cause someone else more work to solve.
>
>There might have been a warning, but Boost produces so many other warnings
>that I missed the warning if there was one. I don't like ignoring warnings
>and I usually use the (VC) option that causes all warnings to be errors, but
>I can't do that when I use Boost. I should try to eliminate the warnings and
>I will make more attempts to do that soon.
>
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Victor A. Wagner Jr.      http://rudbek.com
The five most dangerous words in the English language:
               "There oughta be a law"