On Thu, Aug 19, 2010 at 11:04 AM, Andy Wingo <wi...@pobox.com> wrote: > Heya, > > On Fri 23 Jul 2010 20:46, No Itisnt <theseaisinh...@gmail.com> writes: > >> I'd like to patch Guile's math functionality to expose M_PI, modf, and >> probably other things as well. Before I started I thought I'd ask -- >> would such a patch be accepted? And is there any policy on where they >> should go? It seems a little crass to clutter up the (guile) namespace >> any more, but I don't see anywhere else those could go. > > Hum, I think the right thing is to talk about these one by one. > > For pi, I think I'd like to avoid adding it to the namespace, partly > because I can't think of a good name. M_PI is ugly :) You can always > define it as (define pi (* 4 (atan 1))) or something. > > Actually my schooling was in engineering, so I'd say (define pi 3). ;-) > > Regarding modf -- it seems that the R6RS extends the definition of > `modulo' (called `mod') to be defined over the real numbers. > > (mod 10 3) => 1 > (mod 10 3.0) => 1.0 > (mod 10 3.1) => 0.7 > > This appears to be a compatible extension of the R5RS' `modulo', so we > should just extend our definition. That way we can avoid adding another > symbol. > > Let me know if you're interested in doing this, otherwise I'll get > around to it eventually. But perhaps someone who is less fast-and-loose > with accuracy should do it ;-) > > Cheers, > > Andy > -- > http://wingolog.org/
I managed to phone it in on these, except for modf, so I don't have any need for them, although exposing pi might not be a bad idea anyway.
