[phobos] Status of std.gregorian

[Andrei Alexandrescu]

Thanks for your work, Jonathan. Our decision after the issue with 
Tango's date and time was to use Boost's. I'd started std.gregorian as a 
seed of a port of Boost's date and time, in the hope that someone will 
continue it. Jeff Garland (Boost's date/time author) has been very 
supportive in the matter.

I very strongly suggest to stick with copying Boost's or C++0x's date 
and time facilities, unless we find some clearly superior ways 
facilitated by D's features. Developing our own date/time library from 
scratch risks of being at best just as capable as Boost/C++0x but 
guaranteed unfamiliar to everyone.


Andrei

Jonathan M Davis wrote:
> On Sunday 15 August 2010 04:41:28 SHOO wrote:
>> I had an impression(for std.date) like yours in the past, too and made
>> std.time. However, there was the issue of license with Tango, and it was
>> not connected to Phobos.
>> std.gregorian was developed as a substitute, but unfortunately the API
>> does not even satisfy a matter.
>> I want something which supplements this lack heartily.
>>
>>
>> BTW, I showed the stopwatch which used a performance counter at the same
>> time. This was developed in the totally clean situation that did not take
>> influence at all of Tango.
>> If it is possible, I suggest that to remove std.perf(unlisted
>> module/NOT boost license) and combine my stopwatch module instead.
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> 
> Well, stopwatch functionality could be quite useful completely separately from 
> anything representing a date and time, so if you have something good, and it 
> doesn't have licensing issues, I'm all for having it in Phobos. High precision 
> timers can be quite useful.
> 
> As for the date and time functionality, I started on an implementation shortly 
> after my initial question yesterday, and I already have more functionality than 
> std.gregorian has completed, though I still have a ways to go. I've never looked 
> at the Tango stuff, so if what I do is acceptable, it won't have the same issues 
> that yours unfortunately did.
> 
> When I have something complete enough to be properly useable (though probably 
> not with all of the functionality that we'll eventually want), I'll post it 
> here. I hope to have that within a few days, if not sooner. As it is, I'm likely 
> going to have to implement something similar in C++ for work one of these days 
> soon anyway, so that our newer products won't have the same time issues as the 
> old ones. Historically, we've had to fix time-related bugs just about every time 
> DST rolls around.
> 
> - Jonathan M Davis
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