Re: [boost] is_nan

From: Guillaume Melquiond (gmelquio_at_[hidden])
Date: 2003-07-04 23:03:21

On 4 Jul 2003, Gabriel Dos Reis wrote:

> "Toon Knapen" <toon.knapen_at_[hidden]> writes:
>
> | > seems like this code
> | >
> | >     template< typename T >
> | >     bool is_nan( const T& v )
> | >     {
> | >         return std::numeric_limits<T>::has_quiet_NaN && (v != v);
> | >     }
> | >
> | > does not work correctly on some machines.
> |
> | Could you be more specific. On which machines for instance ?
>
> If v is a signalling NaN, and you're for example using the SPARC
> architecture for example, you might get a trap.
>
> -- Gaby

Just to avoid any kind of misunderstanding, the interval library don't use
signaling NaN.

Regards,

Guillaume