[phobos] CustomFloat

[Lars Tandle Kyllingstad]

David discovered that the problem I reported was a compiler bug that
only turned up if one compiled the files in a very particular order.
Now that the code has been incorporated in Phobos (as opposed to being
in a separate demo module), the problem has disappeared.

-Lars



On Thu, 2010-08-26 at 22:59 -0700, Andrei Alexandrescu wrote:
> My understanding is that CustomFloat is now in good shape. Is that correct?
> 
> Thanks,
> 
> Andrei
> 
> On 6/8/10 1:04 PDT, Lars Tandle Kyllingstad wrote:
> > On Sat, 2010-06-05 at 10:42 -0400, David Simcha wrote:
> >> Robert Jacques (who I know offline and, in fact, was the person who
> >> introduced me to D) has massively improved/debugged CustomFloat and
> >> asked me to post it for review and commit it to Phobos.  See the
> >> attached file.  If everyone's happy with it, I'll replace the current
> >> impl in std.numeric and check it in.
> >
> > It's awesome that someone's working on this -- I've seen people
> > complaining about the state of CustomFloat several times.  (I think the
> > last time was when we discussed the possibility of using an 80-bit
> > CustomFloat in Masahiro's msgpack library, to wrap 80-bit reals on
> > systems that don't support them.)
> >
> > That said, I'm having some problems with it.  Looking at the code and
> > documentation, the following should be correct usage:
> >
> >          alias CustomFloat!16 float16;
> >
> > However, compiling it with DMD 2.046, I get the errors
> >
> >          customfloat.d(430): Error: template instance ToBinary!(real)
> >          does not match template declaration ToBinary(F) if
> >          (is(CustomFloat!(F.sizeof * 8)))
> >          customfloat.d(430): Error: ToBinary!(real) is used as a type
> >          ...
> >
> > -Lars
> >
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