Re: [Boost-users] [serialization] infinite floating point values

From: Johan Råde (rade_at_[hidden])
Date: 2006-07-05 08:38:38

I will put together a facet that solves my problem on the platforms that 
I'm targeting.
I don't know if it's possible to put together a general solution
that works for all projects with all compilers and all processors.

I was very surprised when you told me
that the problem was with the streams.
It is strange that

     std::stringstream s;
     double x = std::numeric_limits<double>::infinity();
     double y;
     ss << x;
     ss >> y;
     assert(x == y);

does not work (at least not with VC++ 7.1).

--Johan Råde

Robert Ramey wrote:
> Should you decide to make the described num_put/get facets you
> might consider investing a little more effort to:
> 
> a) make them templated on the char/wchar_t type.
> b) include a boost like document - you can use the
> utf-8 codecvt facet as a model.
> c) included a test or two.
> d) Upload the whole package to the vault.
> 
> If you're a glutton for punishment, you can request
> a mini-review and maybe get it accepted into Boost.
> 
> I would be personally grateful to anyone who
> undertakes this as it would resolve, an issue
> which comes up repeatedly.
> 
> Of course nothing is easy as it first appears.  There
> is the quesion of how such facets might interact
> with other locale dependent facets.  Also I'm not
> sure that stringstream handles these facets in the
> same way as other ones do.  Hopefully, all these
> questions would be addressed with a little
> research..... And you need to do it anyway
> for your own application.  This is just about
> as close as you're ever going to get to being
> famous for nothing.
> 
> Good Luck
> 
> Robert Ramey
> 
> 
> Johan Råde wrote:
>> I agree. This has nothing to with the serialization lib.
>> I will use the solution that you suggest.
>> Thanks for the help.
>>
>> --Johan Råde
>>
> cgi/boost-users 
> 
> 
> 
> 
> 
> ------------------------------------------------------------------------
> 
> _______________________________________________
> Boost-users mailing list
> Boost-users_at_[hidden]
> http://lists.boost.org/mailman/listinfo.cgi/boost-users