Re: [Boost-users] Boost.Serialization vs STL containers of 'double'

From: Adam M (boost_at_[hidden])
Date: 2005-11-12 17:41:29

Hi Robert,

It turns out I was losing my precision before I even got into
Boost.Serialization. Thanks for the tip.

-Adam

On Sat, 12 Nov 2005 12:42:48 -0800, "Robert Ramey" <ramey_at_[hidden]>
said:
> The precision is set in basic_text_oprimitive.hpp line 139.
> with the statement:
> os << std::setprecision(std::numeric_limits<double>::digits10 + 2);
> 
> I believe that std::numeric_limits<double>::digits10 returns the number
> of digits required to hold the maximum value in base 10.  So either
> 
> a) I misunderstand the function and/or application of std::numeric_limits
> b) its incorrectly implemented on your platform
> c) you think you have more precision than you actually do.
> 
> look into this and check back
> 
> Robert Ramey
> 
> 
> 
> Adam M wrote:
> > Hi,
> >
> > I am using Boost.Serialization to serialize a std::map<std::string,
> > double>.
> >
> > It works fine, except that the precision on the double is not enough
> > for my application.
> >
> > Is it possible to manipulate the precision used when
> > serializing/deserializing double's within an STL container? I tried
> > using setprecision(), but it doesn't understand the "&" stream
> > operator that the Serialization library uses.
> >
> > Thanks,
> > Adam 
> 
> 
> 
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