lens-family

Lens Families

Version on this page:	2.1.2
LTS Haskell 24.18:	2.1.3
Stackage Nightly 2025-11-03:	2.1.3
Latest on Hackage:	2.1.3

See all snapshots lens-family appears in

BSD-3-Clause licensed by Russell O'Connor

Maintained by Russell O'Connor

This version can be pinned in stack with:lens-family-2.1.2@sha256:c13af34889ed9637b2dbd4542122c01a6ec1351cc6dda673de0079f9b02747ef,2026

Module documentation for 2.1.2

Lens
- Lens.Family2

Depends on 5 packages(full list with versions):

base, containers, lens-family-core, mtl, transformers

Used by 3 packages in nightly-2023-12-28(full list with versions):

pontarius-xmpp, sequence-formats, sequenceTools

This package provides first class functional references in Van Laarhoven style supporting the following optics:

Lenses (view, over)
Traversals (toListOf, matching, over)
Setters (over)
Grates (zipWithOf, under, review)
Resetters (under)
Adapters (view, review)
Grids (toListOf, over / under, review)
Prisms (matching, over / under, review)
Getters (view)
Folders (toListOf)
Reviewers (review)