[boost] Re: Patches for Octonion/quaternion libs

From: Jonathan Turkanis (technews_at_[hidden])
Date: 2004-03-30 10:01:13

"Hubert Holin" <Hubert.Holin_at_[hidden]> wrote in message
news:Hubert.Holin-B47483.15195730032004_at_sea.gmane.org...
> Somewhere in the E.U., le 30/03/2004
>
>    Bonjour
>
> In article <c49gf6$nt5$1_at_[hidden]>,
>  "Jonathan Turkanis" <technews_at_[hidden]> wrote:
>
> > "Hubert Holin" <Hubert.Holin_at_[hidden]> wrote in message
> > news:Hubert.Holin-E6FDD4.17090729032004_at_sea.gmane.org...
> >
> >
> > >       My current plans for it (and its siblings) is to
transition
> > from
> > > MWCWPro to XCode (gcc), to add valarray support to the various
> > special
> > > functions (it was on the way, and is locally partially
implemented),
> > and
> > > further on to replace the quaternion/octonion input operators by
> > > something sane, probably based upon Spirit.
> >
> > FYI, Reece Dunne's output formatting library (now slightly
misnamed,
> > since it also handles input) contains facilties for reading and
> > writing boost quaternions and octonions. It is in the sandbox
under
> > outfmt.
> >
> > Jonathan
>
>       That looks extremely interesting!
>
>       However, I have a feeling (perhaps eroneously, given that I
only
> started to look at it), that the support in outfmt is there only for
the
> simplest variants of quaternion and octonion inputs. I was under the
> impression that a full-fledged parser was needed to clean the
awfullness
> that are my current implementations (an octonion parser which might
call
> a quaternion parser which might call a complex parser (or rely on
the
> standard library input),...).
>

The library is able to handle complex nested types, such as vectors of
lists of pairs. I believe this should work for quaternions and
octonions, too. You should consult Reece for the details.

Jonathan