Re: [boost] Spurious warning in lexical_cast.hpp

From: Paul A Bristow (pbristow_at_[hidden])
Date: 2006-08-04 09:33:30

|  -----Original Message-----
|  From: boost-bounces_at_[hidden] 
|  [mailto:boost-bounces_at_[hidden]] On Behalf Of Martin Bonner
|  Sent: 04 August 2006 12:29
|  To: boost_at_[hidden]
|  Subject: Re: [boost] Spurious warning in lexical_cast.hpp
|  
|  From: Paul A Bristow
|  >  From: Alexander Nasonov  
|  >> 
|  >>  I have not get a chance to study the subject yet but I  
|  wonder why
|  >>  don't you just set a precision to some huge number, say 32767 or
|  >> INT_MAX? 
|  > 
|  > This would be hugely wasteful as it would convert everything with
|  > 32767 decimal digits, of which, even with 256-bit floating point, 
|  > 32267 digits would be noise! 
|  
|  <Nit>That implies 500 decimal digits would be non-noise.  
|  Actually the
|  formula suggests that a 256 bit mantissa would only need 79 decimal
|  digits.

<Nitwit>  ;-)

I remembered the result for 128-bit, and substracted 40, but then over-hyped
to 256-bit!

But you got the point.

</nitwit> - for now at least...

Paul