generic-lens: Generically derive traversals, lenses and prisms.

[ bsd3, generics, lens, library, records ] [ Propose Tags ] [ Report a vulnerability ]

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.

The library exposes a van Laarhoven interface. For an alternative interface, supporting an opaque optic type, see generic-optics.

Modules

[Index] [Quick Jump]

Data
- Generics
  - Internal
    - Data.Generics.Internal.VL
      - Data.Generics.Internal.VL.Iso
      - Data.Generics.Internal.VL.Lens
      - Data.Generics.Internal.VL.Prism
  - Data.Generics.Labels
  - Data.Generics.Product
  - Data.Generics.Sum
  - Data.Generics.Wrapped

Downloads

generic-lens-2.3.0.0.tar.gz [browse] (Cabal source package)
Package description (as included in the package)

Maintainer's Corner

Package maintainers

AndreasAbel, mpickering, kcsongor, michaelpj

For package maintainers and hackage trustees

edit package information

Candidates

0.3.0.1, 0.4.1.0, 0.5.1.0, 1.1.0.0, 1.2.0.0, 1.2.0.1, 2.0.0.0, 2.2.2.0, 2.3.0.0

Versions [RSS]	0.1.0.0, 0.2.0.0, 0.3.0.0, 0.3.0.1, 0.4.0.0, 0.4.0.1, 0.4.1.0, 0.5.0.0, 0.5.1.0, 1.0.0.0, 1.0.0.1, 1.0.0.2, 1.1.0.0, 1.2.0.0, 1.2.0.1, 2.0.0.0, 2.1.0.0, 2.2.0.0, 2.2.1.0, 2.2.2.0, 2.3.0.0 (info)
Change log	ChangeLog.md
Dependencies	base (>=4.11 && <5), generic-lens-core (>=2.3.0.0 && <2.4), profunctors [details]
Tested with	ghc ==9.14.1, ghc ==9.12.2, ghc ==9.10.2, ghc ==9.8.4, ghc ==9.6.7, ghc ==9.4.8, ghc ==9.2.8, ghc ==9.0.2, ghc ==8.10.7, ghc ==8.8.4, ghc ==8.6.5, ghc ==8.4.4
License	BSD-3-Clause
Author	Csongor Kiss
Maintainer	kiss.csongor.kiss@gmail.com
Category	Generics, Records, Lens
Home page	https://github.com/kcsongor/generic-lens
Uploaded	by AndreasAbel at 2025-08-27T18:55:22Z
Distributions	Arch:2.2.2.0, Debian:2.0.0.0, LTSHaskell:2.2.2.0, NixOS:2.2.2.0, Stackage:2.3.0.0
Reverse Dependencies	94 direct, 105 indirect [details]
Downloads	34239 total (90 in the last 30 days)
Rating	2.75 (votes: 7) [estimated by Bayesian average]
Your Rating	λ λ λ
Status	Docs available [build log] Last success reported on 2025-08-27 [all 1 reports]