[Haskell-cafe] Status of Acid-State and IxSet

Andrea Vezzosi sanzhiyan at gmail.com
Fri May 29 20:08:37 UTC 2015

On Fri, May 29, 2015 at 6:52 PM, Jeremy Shaw <jeremy at n-heptane.com> wrote:
> Hello,
> acid-state is still alive and kicking (and better be since hackage uses it).
> In fact, there is a GSoC project to add replication support this summer I
> believe.
> ixset is still supported. We submitted a patch upstream to syb-with-class
> but have not heard back. Our patched version is here:

Where is this upstream? Since I haven't seen any patches my way until
today I guess there's some other place where I'm not checking.

Anyhow there's a new version on hackage now which builds on ghc-7.10.

I would gladly transfer maintainership of syb-with-class though.


> https://github.com/seereason/syb-with-class
> Nix patches syb-with-class by default -- which is nice ;)
> If you do not have legacy code to support, I highly recommend checking out
> ixset-typed. It is very much like ixset -- but does a better job catching
> errors though the type system. IxSet is a little too loose with the types
> for no real reason resulting in avoidable runtime errors.
> - jeremy
> On Thu, May 28, 2015 at 1:05 PM, JP Moresmau <jpmoresmau at gmail.com> wrote:
>> Hello, for a project I decided to use Acid-State and IxSet, and was pretty
>> happy with them. I enjoyed working with Haskell structures for storing and
>> querying data, and my data could fit in memory. However, now I've moved to
>> GHC 7.10, and for example syb-with-class, a dependency of ixset, does not
>> build with template-haskell 2.10. So I'm wondering, are these projects still
>> alive and kicking? Are if I want some memory based storage and indexing,
>> should I look at some other projects (maybe VCache
>> http://hackage.haskell.org/package/vcache). Or is it just bad timing and GHC
>> 7.10 compatible versions of these libraries are in the works?
>> Thanks!
>> --
>> JP Moresmau
>> http://jpmoresmau.blogspot.com/
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