[Haskell] Announcing Haskell 2010
Simon Marlow
Haskell 2010. Over the last couple of months the committee has been
making final decisions about which extensions should be a part of this
revision. The final list is:
DoAndIfThenElse
HierarchicalModules
EmptyDataDeclarations
FixityResolution
ForeignFunctionInterface
LineCommentSyntax
PatternGuards
RelaxedDependencyAnalysis
LanguagePragma
NoNPlusKPatterns
You can read more about each one, including rationale for and against,
on its relevant wiki page, which are linked from the tickets:
Haskell 2010 is a small but significant step on the road that was
started by the Haskell' committee 4 years ago, The process has not been
a smooth one, and there have been several changes of direction, but the
current process is actually producing concrete results that let us move
the language forward in positive steps, so I feel we're on the right track.
We all owe the current committee a big thank-you for sticking with the
process this long: most of them didn't realise the magnitude of what
they were signing up for at the beginning. The short list of changes
above tells only a small part of the story, there is a wealth of wiki
content and mailing-list discussion that future language revisions can
draw on.
So what now?
* We will produce a revised version of the Haskell language report
incorporating these changes. That will happen over the next few
months.
* Compilers can start implementing the changes, and flags to
select the Haskell 2010 revision. In GHC we expect to have
support in the next major release, i.e. 6.14.1.
* Right now, we will start forming a Haskell 2011 committee to
mange the process of deciding on changes for next year's revision.
The current committee is still discussing how to go about
finding a new committee (the plan is to at least have open
nominations) but I expect to be able to announce more details
very soon.
* Everyone can participate in the Haskell 2011 process, by discussing
and refining proposals. Information about how to do that is on
the Haskell Prime wiki:
http://hackage.haskell.org/trac/haskell-prime/wiki
Remember: this is a community effort. The changes that get
adopted in each revision are drawn from the pool of fully-specified
proposals, and those proposals can be written by anyone.
Thanks,
Simon, on behalf of the Haskell 2010 committee
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Malcolm Wallace
> I'm very proud to announce a new revision of the Haskell language,
> Haskell 2010.
Hurrah!
> * Compilers can start implementing the changes, and flags to
> select the Haskell 2010 revision. In GHC we expect to have
> support in the next major release, i.e. 6.14.1.
Just to note that 6.14.1 will be the next-plus-one, since
6.12.1 has not yet been released...
Regards,
Malcolm
David Leimbach
Second, Oh shit! Graham Hutton's excellent Haskell introduction book is now
not valid Haskell 2010 due to N+K patterns?
I loaned that book to my boss and he's really enjoyed it. I guess I'll have
to buy a revised copy. Can we get an update to it? :-)
I realize N+K was considered dangerous
Simon Marlow
> First off congratulations everyone!
>
> Second, Oh shit! Graham Hutton's excellent Haskell introduction book is
> now not valid Haskell 2010 due to N+K patterns?
Right, but it's still valid Haskell 98, and we have no immediate plans
at least in GHC to drop support for Haskell 98. It will probably not be
the default in 6.14.1, though.
Cheers,
Simon
> Has...@haskell.org <mailto:Has...@haskell.org>
> http://www.haskell.org/mailman/listinfo/haskell
>
>
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Norman Ramsey
> Haskell 2010.
I stand up and cheer. It's great to see fruit from so many years of
effort, and I am very grateful to the Haskell-prime committee for all
this work, and for the improvements.
I look forward to using the new standard!
Norman