[phobos] Proposed changes to std.math + introduce std.mathspecial

[SHOO]

Things are not going well...

However, these statistics functions are used depending on a case well.
In addition, I think that it is not overengineering about only 
dstats.summary when I watch recent Phobos.
I think it seems to be worth being included in Phobos.

It seems to be necessary to look at the state for a while.

--
SHOO

(2010/11/18 22:49), David Simcha wrote:
> Others have suggested this in the past. There are/were a few major
> things holding it up:
>
> 1. While I feel that dstats.summary has about the right level of
> complexity/engineering for a third-party statistics lib, I'm a little
> worried that it's overengineered for a standard library module.
>
> 2. The brokenness of alias this. I designed the hierarchy of different
> summary-calculating output ranges to rely heavily on alias this. The
> relevant bugs may have been fixed recently, in 2.050. I'll have to check.
>
> 3. A bunch of stuff uses TempAlloc for its temporary scratch space. I'd
> like to keep it that way for efficiency, but it's hard to put TempAlloc
> into Phobos given that the issue of GC scanning *still* isn't solved.
>
> One solution to these problems is to just move the more basic stuff over
> to Phobos and publicly import it from dstats.summary.
>
> On 11/18/2010 8:00 AM, SHOO wrote:
>> BTW, I want statistical functions in Phobos. For example,
>> dstats.summary looks good. Is there the plan to introduce such functions?
>>
>> --
>> SHOO
>>