Re: [boost] is_nan

From: Gabriel Dos Reis (gdr_at_[hidden])
Date: 2003-07-04 11:20:04

"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