GHC 6.12.1

December 2009GHC 6.12.1Mailing list: GHC 6.12.1 releasedRelease notes for GHC 6.12.1

New language extension flags:

• TupleSections
• MonoLocalBinds
• DeriveFunctor, DeriveFoldable, and DeriveTraversable
• NoNPlusKPatterns
• ExplicitForAll

New compiler flags:

• -fwarn-dodgy-exports
• -fwarn-unused-do-bind

This GHC version corresponds to base version 4.2.0.0.base-4.2.0.0

Several functions were movedCommit converting (<$), (*>), (<*), some, and many to class methods into typeclasses to allow instances to provide more efficient definitions where possible.

• The (<$) function became a method of the Functor class.
• The (*>) and (<*) functions become methods of the Applicative class.
• The some and many functions became methods of the Alternative class.