"Data.Diverse.Many" is an extensible record for any size encoded efficiently as (Seq Any).

"Data.Diverse.Which" polymorphic variant of possibilities encoded as (Int, Any).

Provides getters, setters, projection, injection, folds, and catamorphisms; accessed by type or index or label.

Refer to ManySpec.hs and WhichSpec.hs for example usages.

Iso, Lens and Prisms are provided in data-diverse-lens

Changelog

• 0.1.0.0

  • Initial version represented as (Int, Data.Map Int Any)

• 0.4.0.0

  • Removed Emit typeclass, breaking renames. Added label accessors.

• 0.5.0.0

  • Renamed type level functions module from Type to TypeLevel

• 0.6.0.0

  • Moved lens to data-diverse-lens

• 0.7.0.0

  • Removed NOINLINE pragmas.
  • Changed internal representation to (Int, Data.IntMap Any) for a 2.5x append speedup.

• 0.8.0.0

  • Changed internal representation to (Data.Seq Any) for a further 2x append speedup.
  • Added NFData instance for Many.

• 0.8.1.0

  • Added NFData instance for Which.
  • Forgot to expose Many.sliceL and Many.sliceR.

• 0.9.0.0

  • Breaking changes: Renamed Many.sliceL/R to Many.viewf/b
  • Renamed TypeLevel.Internal.MissingImpl to IsUniqueImpl.
  • Added postifx' with SnocUnique and append' with AppendUnique.
  • Added Semigroup & Monoid instances for Many '[] and Which '[]
  • Fixed GHC 8.2 compile error with importing GHC.Prim (Any)

• 0.9.0.1

  • Fixed GHC 8.2.1 test failure due to changed TypeRep show instance.

• 0.10.0.0

  • Renamed Switch to Switcher. Switch is now a type synonym for switch constraints
  • Added CasesResult type family to help infer the result of cases
  • Added Semigroup and Monoid instances for all Many xs.
  • Added Maybe versions of trial, and reinterpret
  • Renamed reinterpetN to reinterpretN'
  • Renamed impossible to zilch.
  • Allowed reintepreting and diversifying zilch to zilch
  • Removed zipped type variable from Amend constraints.
  • Removed r type variable from Reduce typeclass.
  • Rearranged type variables in fetch, replace, pick, trial, Diversify type parameters, so the type variable ordering is consistently smaller to larger, ie. 'x', 'xs', 'branch', 'tree'
  • Added diversify' for allowing rearranging the types only.

• 0.11.0.0

  • Fixed https://github.com/louispan/data-diverse/issues/4
  • Added impossible modelled after Data.Void.absurd
  • Removed zilch so Which '[] is uninhabited like Data.Void.Void, making 'impossible' safe to use.
  • Removed Monoid and changed Show, Read and Generic instances for Which '[] to be partial just like Data.Void.Void.
  • Added instance Reduce (Which '[]) (Switcher c '[] r), which follows from 'impossible'.