State of Play

[Steven Schveighoffer]

On Thu, 26 Mar 2009 15:50:22 -0400, Brad Roberts <braddr at puremagic.com>  
wrote:

> Steven Schveighoffer wrote:
>> On Thu, 26 Mar 2009 07:42:01 -0400, Mike James <foo at bar.com> wrote:
>>
>>> Is Tango for D2.0 at a level of D1.0 and can be used now?
>>
>> No.  It is being worked on.  I don't forsee Tango for D2 being ready
>> until at least September, perhaps later.
>>
>> -Steve
>
> Would you mind outlining / documenting what needs to be done?  I'd
> expect that there are a number of people who would be interested in
> volunteering to help.

what needs to be done:

1. Make Tango build on top of druntime.  I just merged from trunk  
yesterday, which was about 300 files, so most likely there will be compile  
issues ;)
2. Const-ify everything.  Some parts are already done.
3. Make all opApply's scoped properly.

Not sure what happens after that, but step 2 alone is a ton of work.  In  
addition, there are some blocker bugs in DMD (1645 and 2524 right now)  
that prevent a complete port.

When the shared/unshared paradigm is released, there's probably another  
ton of work to do :)

And of course, there's the possibility of redesigns.  A lot of code can  
probably make use of __traits and there are the new range constructs to  
consider.  Of course, these are all probably things that would be severely  
different from the D1 version, so they probably won't happen for a while.

Note that the September or later date is based on the amount of time I  
spend on it (which isn't a lot).  Someone who wanted to do nothing but  
porting Tango to D2 could probably get it done in a month or two.  Note  
also that I don't consider the port done until all the "cast to get it to  
compile" hacks are removed.  In some cases, this requires design changes,  
and in some of those, tough decisions.

-Steve