Re: [Boost-users] [interval]

From: Guillaume Melquiond (guillaume.melquiond_at_[hidden])
Date: 2006-08-28 08:13:46

Le lundi 28 août 2006 à 10:09 +0100, Andy Little a écrit :

> > With the default interval policies, transcendental functions are not
> > enabled since they usually do not provide the inclusion property of
> > interval arithmetic. This is why you get a compile-time error.
> >
> > For specific policies, you can take a look at the find_root.cpp and
> > transc.cpp examples. The first one provides non-guaranteed interval
> > functions by relying on the standard library. The second one provides
> > guaranteed interval functions by relying on an external library.

[...]

> The bit I read was "There is not much to say". and I assumed from that they
> should work by default.

Looking at it now, I agree it was not really clear. It should have been
specified that the functions will fail to compile if the policies do not
provide corresponding features.

> Is it worth modifying the text of the docs:
> 
> "The functions sqrt, log, exp, sin, cos, tan, asin, acos, atan, sinh, cosh,
> tanh, asinh, acosh, atanh are also defined. With the default interval policies,
> transcendental functions are not enabled since they usually do not provide the
> inclusion property of interval arithmetic, so you will get a compile-time error
> unless you provide a valid  policy. These functions extend the traditional
> functions to the intervals and respect the basic property of interval
> arithmetic. They use the checking policy to produce empty intervals when the
> input interval is strictly outside of the domain of the function."
> 
> I can do the mods, but someone else will have to apply them(no CVS access) and I 
> will have to embed them in a post.

Do not bother writing a patch. I will do the changes directly. Thanks
for the wording.

Best regards,

Guillaume