Re: [Boost-users] [Numeric.Interval_Lib] typecasting behaviour

From: tirath (research-lists_at_[hidden])
Date: 2006-10-23 08:38:18

On 21/10/2006, at 10:06 PM, Guillaume Melquiond wrote:
>
> This is not correct. If the range is too small to be represented in
> single precision, it will be inflated until it can be represented. So
> you don't have to inflate the range one more time when you convert it
> back to double precision, as it already was.

Great, that works as I had hoped.

On 22/10/2006, at 9:31 PM, Guillaume Melquiond wrote:
>
> Following up on myself. There is a bug [*] in GCC 3.4 and later such
> that the compiler generates wrong code when converting from
> interval<double> to interval<float>. So, if your compiler is GCC, the
> behavior you observe is not surprising (although completely wrong).

You are correct; with gcc 4.0 the testcase fails as previously  
described, with gcc 3.3 it works as expected. Thanks for your help  
troubleshooting this.

Sincerely,
Tirath Ramdas