Re: [boost] [serialization]Serialisation/deserialisationoffloating-point values

From: Paul A Bristow (pbristow_at_[hidden])
Date: 2006-04-06 12:33:39

| -----Original Message-----
| From: boost-bounces_at_[hidden] 
| [mailto:boost-bounces_at_[hidden]] On Behalf Of Damien Fisher
| Sent: 06 April 2006 16:23
| To: boost_at_[hidden]
| Subject: Re: [boost] 
| [serialization]Serialisation/deserialisationoffloating-point values
| 
| >From your previous comments it sounds like there is a real 
| problem in MSVC.
| But from this comment it sounds like maybe not?  Or maybe I'm
| misunderstanding your comment (i.e., does it just apply to 
| the example you gave?).

It helps to use debug mode if you expect an assert to fire ;-)  Doh!

Attached is a test that DOES fail for me, and I will post a fuller test to
the vault when I can.

Sorry for noise.

Paul

PS A possible workaround:

std::stringstream s;
ss << scientific << output_value;

works for all cases tried (100000000).

This will increase the size of the XML (for exmaple) archive file, of
course, but...

PPS I note that if you repeatedly serialize and restore then you may get a 1
bit creep up each time - it could build up to significant differences.

-- 
Paul A Bristow
Prizet Farmhouse, Kendal, Cumbria UK LA8 8AB
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