optics-0.4.2 (2022-05-19)

• Allow transformers-0.6 and mtl-2.3

  Note that optics-extra no longer defines Zoom instances for ErrorT or ListT when building with mtl-2.3 or later. This is because MonadState is a superclass of Zoom, and the MonadState instances for ErrorT and ListT were removed in mtl-2.3. Be watchful of this if you build optics-extra with mtl-2.3 (or later) combined with an older version of transformers (pre-0.6) that defines ErrorT or ListT. Similarly for Magnify and MagnifyMany.

optics-0.4.1 (2022-03-22)

• Add support for GHC-9.2
• Add is (#410)
• Improve error messages related to the JoinKinds class (#439)
• Port universeOf, cosmosOf, paraOf, rewriteOf, transformOf, rewriteMOf and transformMOf from Control.Lens.Plated (#379)
• Add (%?) composition operator (#434)

optics-0.4 (2021-02-22)

• See migration-guide-0.4.md for more details
• Add support for GHC-9.0
• Drop support for GHC-8.0
• The FunctorWithIndex, FoldableWithIndex and TraversableWithIndex type classes have been migrated to a new package, indexed-traversable (#370)
• Add adjoin, iadjoin and both to Optics.[Ix]Traversal (#332, #372)
• Add ifst and isnd to Optics.IxLens (#389)
• Generalize types of generic (#376)
• Make chosen an indexed lens to see which value is traversed (#335)
• Remove GeneralLabelOptic extensibility mechanism (#361)
• Add gfield, gafield, gconstructor, gposition and gplate for generics-based data access (#358, #361)
• Add support for generics-based field lenses and constructor prisms (gfield and gconstructor) to LabelOptic so they can be used via OverloadedLabels (#361)
• Remove unnecessary INLINE pragmas to reduce compile times (#394)
• Simplify the type of (%) using new JoinKinds and AppendIndices classes in place of the Join and Append type families (#397, #399)
• Print missing language extensions during TH generation of labels if there are any (#352)
• Add support for getters of rank1 polymorphic fields to optics generated with the makeFieldLabels family of functions (#365)
• Extend support of type-changing optics generated with the makeFieldLabels family to type parameters that are phantom and applied to non-injective type families (#365)
• Fix TH generation of optics for poly-kinded data families (#378)
• Fix declareFieldLabels when a field type refers to a type defined in the same quote (#380)

optics-0.3 (2020-04-15)

• GHC-8.10 support
• Add filteredBy and unsafeFilteredBy
• Add FunctorWithIndex, FoldableWithIndex and TraversableWithIndex instances for Const and Constant
• Add afoldVL and iafoldVL constructors
• Rename toAtraversalVL to atraverseOf, and toIxAtraversalVL to iatraverseOf
• Generalise element and elementOf to construct IxAffineTraversals instead of IxTraversals
• Change mapping to work on optic kinds other than Iso: it now supports Lens and Prism degenerating to Getter and Review respectively
• Generalise ignored to be an IxAffineTraversal instead of an IxTraversal
• Add singular and isingular
• Add (^?!) operator
• Expose Curry and CurryCompose
• Show expected elimination forms on optic kind mismatch
• Use stricter uncurry for better performance
• Add hidden LabelOptic instance to postpone instance resolution
• Add GeneralLabelOptic for pluggable generic optics as labels
• Document monoidal structures of Folds
• Remove proxy argument from implies
• Add itoList
• Improvements to TH-generated optics:
  • LabelOptic instances make optic kind a type equality for better type inference
  • LabelOptic instances for field optics work properly in the presence of type families
  • Fixed calculation of phantom types in LabelOptic prism instances
  • Better support for generating optics in the presence of kind polymorphism

optics-0.2 (2019-10-18)

• Add non, non' and anon to Optics.Iso
• ix can produce optic kinds other than AffineTraversal
• Generalise type of generic1
• Move use from Optics.View to Optics.State and restrict its type
• Add preuse to Optics.State
• Rename use, uses, listening and listenings to reflect the fact that they have ViewResult-generalised types
• Add noPrefixFieldLabels and noPrefixNamer to Optics.TH
• Move some internal definitions out to new indexed-profunctors package
• Introduce OpticKind and IxList type synonyms for better type inference
• Make itraverse for Seq faster for containers >= 0.6.0
• Assorted documentation improvements

optics-0.1 (2019-09-02)

• Initial release