GHC 8.2.1

July 2017GHC 8.2.1Mailing list: GHC 8.2.1 releasedGHC blog: GHC 8.2.1 releasedRelease notes for GHC 8.2.1

New language extensions:

• DerivingStrategies
• UnboxedSums

Options added to the GHCi :type command:

• +d to apply type defaulting to the expression
• +v to provide information relevant to explicit type application, a feature that was added in GHC 8.0

This GHC version corresponds to base version 4.10.0.0.base-4.10.0.0

• BifoldableBifoldable in base and Bitraversable,Bitraversable in base previously available from the bifunctors package,The bifunctors package are now included in base.
• The liftA2 function is now a method of the Applicative class.
• The Semigroup instance for IO is added.
• The GHC.RecordsRecord field selector polymorphismGHC.Records in base module is added, containing the HasField class which will later support the OverloadedRecordDot extension in GHC 9.2.