generic-lens-core

Generically derive traversals, lenses and prisms.

https://github.com/kcsongor/generic-lens

LTS Haskell 24.14:	2.2.1.0@rev:2
Stackage Nightly 2025-10-11:	2.3.0.0
Latest on Hackage:	2.3.0.0

See all snapshots generic-lens-core appears in

BSD-3-Clause licensed by Csongor Kiss

Maintained by [email protected]

This version can be pinned in stack with:generic-lens-core-2.3.0.0@sha256:8837e26a0ed6b7c7872bcdabe610ba329d880c7a9c99b5e4bcb9348d46639738,3067

Module documentation for 2.3.0.0

Data
- Data.GenericLens
  - Data.GenericLens.Internal
- Data.Generics
  - Data.Generics.Internal
    - Data.Generics.Internal.Errors
    - Data.Generics.Internal.Families
    - Data.Generics.Internal.GenericN
    - Data.Generics.Internal.Profunctor
      - Data.Generics.Internal.Profunctor.Iso
      - Data.Generics.Internal.Profunctor.Lens
      - Data.Generics.Internal.Profunctor.Prism
    - Data.Generics.Internal.VL
      - Data.Generics.Internal.VL.Traversal
    - Data.Generics.Internal.Void
    - Data.Generics.Internal.Wrapped
  - Data.Generics.Product
    - Data.Generics.Product.Internal
  - Data.Generics.Sum
    - Data.Generics.Sum.Internal

Depends on 3 packages(full list with versions):

base, indexed-profunctors, text

Used by 2 packages in nightly-2025-10-11(full list with versions):

generic-lens, generic-optics

This library uses GHC.Generics to derive efficient optics (traversals, lenses and prisms) for algebraic data types in a type-directed way, with a focus on good type inference and error messages when possible.

This package is the shared internal logic of the generic-lens and generic-optics libraries.

Changes

generic-lens-core-2.3.0.0 (2025-08-27)

GHC 9.14 compatibility

generic-lens-core-2.2.1.0 (2022-01-22)

GHC 9.2 compatibility

generic-lens-core-2.2.0.0 (2021-07-13)

GHC 9.0 compatibility

generic-lens-core-2.1.0.0 (2021-01-25)

Expose Data.Generics.Product.Internal.Subtype (#127, Tom Harding)

generic-lens-core-2.0.0.0 (2020-02-11)

Initial release