TR1 Special Math

[Ed Smith-Rowland]

On 11/13/2015 10:32 AM, Jonathan Wakely wrote:
> On 25 October 2015 at 20:48, Jonathan Wakely <jwakely.gcc@gmail.com> wrote:
>> On 25 October 2015 at 17:46, Ed Smith-Rowland <3dw4rd@verizon.net> wrote:
>>> On 10/24/2015 11:38 PM, Jonathan Wakely wrote:
>>>> On 8 May 2015 at 15:05, Ed Smith-Rowland <3dw4rd@verizon.net> wrote:
>>>>> On 05/07/2015 12:06 PM, Jonathan Wakely wrote:
>>>>>> Hi Ed,
>>>>>>
>>>>>> The C++ committee is considering the
>>>>>> http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2015/n4437.pdf
>>>>>> proposal to make C++17 include the contents of ISO 29124:2010 (the
>>>>>> special math functions from TR1 that went into a separate standard,
>>>>>> not into C++11).
>>>>>>
>>>>>> What is the status of our TR1 implementation? Is it complete? Good
>>>>>> enough quality to move out of the tr1 sub-dir?
>>>>>>
>>>>>> Even if N4437 isn't accepted for C++17 we could move things around to
>>>>>> turn the TR1 code into an iso29124 implementation, do you think that
>>>>>> would make sense?
>>>>>>
>>>>> That would make absolute sense.
>>>>> I actually have a tree where I've done that.
>>>>> All the functions are in there (29124 removed the hypergeometric
>>>>> functions.
>>>>> I'd like to keep those as extensions.
>>>>> I have some bugfixes also.
>>>>>
>>>>> I have a better version of the Carlson elliptic functions (which are used
>>>>> in
>>>>> the 29124 elliptic functions).
>>>>>
>>>>> Ed
>>>>>
>>>> Hi Ed, Florian,
>>>>
>>>> Here's a patch to re-use the TR1 math functions to implement IS 29124,
>>>> what do you think of this approach? Ed, were you just going to copy
>>>> the files and have duplicated code?
>>>>
>>>> We should probably uglify the names of the hypergeometric functions if
>>>> they are not in the final standard.
>>>>
>>>> This doesn't include Florian's patch, which should be applied.
>>>>
>>>> (I want to get this done before stage 1 ends in a couple of weeks, so
>>>> am posting this for review now, but I'll be unavailable for the next
>>>> week or two and might not be able to actually commit anything until
>>>> stage 3).
>>> Hi all!
>>>
>>> I am actually very aware of the stage 1 deadline and am working furiously!
>>>
>>> This patch adds the hypergeometric and confluent hypergeometric functions
>>> that were actually stricken fromTR29124.
>>> I actually had a mind to add those back especially since the confluent one
>>> is actually pretty stable in it's realm and is used in some statistics
>>> tests.
>>> I expect that some people have ventures to use both and so TR29129 would not
>>> be a full replacement for TR1 without them.
>>>
>>> I intend to post within the next few days.  I have to realize that some of
>>> my hopes and dreams would be better done with these in tree! ;-)
>>>
>>> Thank you for lighting a fire Jonathan!
>> Excellent, glad to hear you're on this, as you know the code and the
>> specs, whereas I'm poking around blindly :-)
> Hi Ed,
>
> Have you been able to find enough time to work on this?
>
> Will you be able to make the stage 1 deadline tomorrow, and if not, do
> you think I should apply my patch to re-use the TR1 stuff?  (We can
> apply Florian's bug fix to that as well).
>
I'm going to post something in a few hours.