Hi Ben,
I think that D1152 (Record Pattern Synonyms) will be ready for 7.12.
https://phabricator.haskell.org/D1152
On Thu, Aug 27, 2015 at 5:38 PM, Ben Gamari
Hello everyone!
With the 7.10.1 release nearly six months behind us and 7.10.2 out of the way, now is a good time to begin looking forward to 7.12. In keeping with the typical release pace, we are aiming to have a release candidate ready in mid-December 2015 and a final release in January 2016.
The items that that we currently believe have a good chance of making it in to 7.12 are listed on the release status page [1], which I've summarized below (in no particular order),
* Support for implicit parameters providing callstacks and source locations
* Support for wildcards in data and type family instances
* A new, type-indexed type representation, data TTypeRep (a :: k).
* Introduction of visible type application
* Support for reasoning about kind equalities
* Support for Injective Type Families
* Support for the Strict language extension
* Support for Overloaded Record Fields, allowing multiple uses of the same field name and a form of type-directed name resolution.
* A huge improvement to pattern matching (including much better coverage of GADTs)
* Backpack is chugging along; we have a new user-facing syntax which allows multiple modules to be defined a single file, and are hoping to release at least the ability to publish multiple "units" in a single Cabal file.
* Support for Applicative Do, allowing GHC to desugar do-notation to Applicative where possible.
* Improved DWARF based debugging support including backtraces from Haskell code
* An Improved LLVM Backend that ships with every major Tier 1 platform.
These items are a bit less certain but may make it in if the authors push forward quickly enough,
* Support for Type Signature Sections, allowing you to write (:: ty) as a shorthand for (\x -> x :: ty).
* A (possible) overhaul of GHC's build system to use Shake instead of Make.
* A DEPRECATED pragma for exports
Is your pet project missing from this list? If you have a patch that you believe is on-track to make it in for 7.12, please let us know.
Moreover, if you have an issue that you urgently need fixed in 7.12, please express you interest on the appropriate ticket. User feedback helps us immensely in figuring out how to best place our priorities.
Cheers,
- Ben
[1] https://ghc.haskell.org/trac/ghc/wiki/Status/GHC-7.12.1
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