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"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


  • - Renamed fetch to grab to avoid conflicting with Haxl. - Removed unused type functions from removed splitting functions (Before,To,After,From,Length) - Added impossible' and ability to diversify and reinterpret Which '[Void] - Added zilch - Removed CanAppendUnique (not useful).

  • - Simplified type synonyms for Which. Added Reinterpreted constraint synonym.

  • - Breaking change: the prime (xxx') version of functions are now consistently the simpler or non-polymorphic version. - This is more consistent with Control.Lens as well. - This means the following are swapped: - replace, replace' - replaceL, replaceL' - replaceTag, replaceTag' - replaceN, replaceN' - amend, amend' - amendL, amendL' - amendN, amendN' - Breaking change: Removed proxy argument from fetchL/Tag/N, replaceXXX, selectL/Tag/N, amendXXX, pickL/Tag/N, trialL/Tag/N relying soley on TypeApplications and now requiring AllowAmbiguousTypes. The Proxy is also removed from the Read/Show serialized format. - Rearranged type variables in fetchL/N, replaceL/Tag/N, pickL/Tag/N, trialL/Tag/N type parameters, so the type variable ordering is consistently label, orig to change, smaller to larger, ie. l/n, x, y, xs

  • - Removed splitting operations added in - added xxxTag version of label operations that also automatically untags the field.

  • - PolyKinds for Which - Removed cabal upper bounds

  • - Added insert/remove for GHC < 8.2 - Removed type functions UniqueMemberAt, MaybeUniqueMemberAt

  • - insert/remove is not available in GHC 8.2 onwards.

  • - Rerranged type variable for xxxL and xxxN functions so that the x inferrred from label l or index n is after proxy. - This affects fetch[L|N], replace[L|N], replace[L|N]', pick[L|N] - Depends on at least containers- for Data.Sequence.insertAt - Added splitting operations: split[Before|After][|L|N], inset[Before|After][|L|N], insert[Before|After][|L|N], remove[Before|After][|L|N] - Renamed type function Without to Remove to be consistent with new remove method.

  • - Added CaseFunc and CaseFunc' which replaces CaseTypeable (eg CaseFunc @Typeable) https://github.com/louispan/data-diverse/issues/6 - Replaced IsAll constraint with AllConstrained.

  • - Added CaseTypeable' as an example of polymorphic Case that doesn't change the type.

  • - The exposed api shouldn't break, but there are a lot of internal changes. - Added AFunctor which can map over the types in the 'Many' https://github.com/louispan/data-diverse/issues/5. - Added friendlier type synomyns Collect and CollectN for collect and collectN - Expose type of 'Collector' and 'CollectorN' - Replace type parameter r from Case typeclass with CaseResult type family. - Replaced CasesResult type function with IsAll and CasesResults type functions. - All CaseXxx type variables now end with r xs. - All CaseXxxN type variables now end with r n xs.

  • - Added impossible modelled after Data.Void.absurd https://github.com/louispan/data-diverse/issues/4 - 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.

  • - 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.

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

  • - 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)

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

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

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

  • - Moved lens to data-diverse-lens

  • - Renamed type level functions module from Type to TypeLevel

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

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

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