On 21/08/13 16:11, Ryan Newton wrote:
Hi all,
It is not merged into "master" presently but I would like to propose the
three new primops that are on the "atomics" branch for inclusion in 7.8.
These are pretty much completely apart from everything else and don't
break any existing code.
For the public library that exposes these things ("atomic-primops") it
will be a great boon to be able to depend on them in 7.8 and not have
to wait yet another release cycle [1].
I skimmed the patches and they look OK to me (modulo the tabs).
Of course longer term we should have MachOps for the low-level atomic
operations and get rid of the two layers of function call in these primops.
Cheers,
Simon
Best,
-Ryan
[1] P.S. 7.8 will already be a breaking change to atomic-primops,
because of the change in CMM syntax. So if it has to be #ifdef'd
anyway, we might as well go straight to the Right Thing rather than
having a proliferation of intermediate hacks.
On Tue, Aug 20, 2013 at 1:01 PM, Austin Seipp <ase...@pobox.com
<mailto:ase...@pobox.com>> wrote:
All,
GHC 7.8's release is drawing near. We would like to make a release
candidate sometime around ICFP, which will be in late September.
Unfortunately that's just over a month a way, so the clock is ticking!
The tree will need a few weeks of stabilization. After that, we will
release an RC, and likely branch. Then things will roughly return to
normal.
The exact date for feature cutoff is not set yet (but I will follow
up soon on this.) So, I'd like a show of hands and a quick 'check
in' for outstanding work for 7.8. There are a few things we know for
sure are - or were - tentatively scheduled for this release:
* SIMD improvements
* New Template Haskell
* Constraint solver for type naturals
These are - as far as I'm aware - the largest outstanding features
which not quite yet in HEAD.
For the release, we would like to minimize 'disruptive' features,
because 7.8 already has many large changes. In particular, Dynamic
GHCi and dynamic builds will likely prove the biggest challenge 'in
the field', so we would like plenty of time to stress this as best
we can for the RC, and the release itself.
There are some things which we are fairly certain will not make it:
* Joachim's new newtype coercion implementation
* Adam's new record implementation
There are some things I'm not very privvy to perhaps, but could
still go in:
* Nicolas possibly had some optimisation improvements according to
Simon.
* Edsko had a small patch for extended plugin functionality in
HEAD, but Luite and Thomas also have input here. Status is uncertain.
* ERDI was working on pattern synonyms. I believe you were having
some trouble with the implementation. Can someone help him if necessary?
Finally, there are loose ends to tie off:
* I believe Simon and Jose were having discussions about the new
Typeable implementation, regarding hand-written instances. This
should be fine for 7.8 and is mostly some behavioral tweaking I think.
I've undoubtedly missed things here. Please fill me in. :)
Note that before the freeze, you should interpret 'disruptive' with
your own good judgement. Smaller patches and improvements are
certainly welcome as always, and you shouldn't wait on me to push
something if you feel good about it. If you're ever unsure, just
ask. Worst case is something gets backed out, but it's nothing we
cannot come back to.
--
Regards,
Austin - PGP: 4096R/0x91384671
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