Alternative package:Cabal-syntax

class Applicative f => Alternative (f :: Type -> Type)
Cabal-syntax Distribution.Compat.Prelude
A monoid on applicative functors. If defined, some and many should be the least solutions of the equations:
AlternativeLayoutRule :: KnownExtension
Cabal-syntax Language.Haskell.Extension
Undocumented parsing-related extensions introduced in GHC 7.0.
AlternativeLayoutRuleTransitional :: KnownExtension
Cabal-syntax Language.Haskell.Extension
Undocumented parsing-related extensions introduced in GHC 7.0.