On Thu, Nov 13, 2008 at 3:18 PM, Cromwell Enage <sponage@yahoo.com> wrote:
--- On Thu, 11/13/08, Beman Dawes <bdawes@acm.org> wrote:
The latest WP is N2798. See http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2798.pdf
Got it.
I just noticed section 20.3, called "compile-time rational arithmetic", and I'm wondering how stable that specification is.
20.3 in N2798 is very stable, since except for the diff markup it is the same as the Committee Draft that is currently being reviewed by national bodies, and there are no outstanding issues in the LWG active issues list.
Hmmm. I see that the ratio class template is neither required nor implemented as a nullary metafunction, as std::integral_constant is. (There is no "typedef ratio<N,D> type;" statement.) Is there any particular reason? I ask because this may cause problems if I try to have the ratio interact with other MPL metafunctions.
Howard would have to comment on that; I've pinged him to make him aware of this thread. The Boost implementation can add extensions, and we can submit a comment on the CD. If it is as simple as a typedef, it stands a good chance of being accepted. If you write it up, with a proposed resolution, I'll submit it. --Beman