assoc

swap and assoc: Symmetric and Semigroupy Bifunctors

Version on this page:1.1@rev:1
LTS Haskell 24.18:1.1.1@rev:1
Stackage Nightly 2025-11-03:1.1.1@rev:1
Latest on Hackage:1.1.1@rev:1

See all snapshots assoc appears in

BSD-3-Clause licensed and maintained by Oleg Grenrus
This version can be pinned in stack with:assoc-1.1@sha256:56d0fd1c17aaf6268e81bf19ba5afe186128d7f88126bd546d5b3151ab692652,1617

Module documentation for 1.1

Depends on 2 packages(full list with versions):
base, tagged
Used by 4 packages in nightly-2023-12-28(full list with versions):
bifunctors, lens, strict, these

Provides generalisations of swap :: (a,b) -> (b,a) and assoc :: ((a,b),c) -> (a,(b,c)) to Bifunctors supporting similar operations (e.g. Either, These).

Changes

1.1

  • Depend on bifunctor-classes-compat only. Instances for types defined in bifunctors package are moved there. With this change assoc only depends on base and tagged.
  • Mark modules as explicitly Safe

1.0.2

  • Add ‘Swap’ instances for more n-tuples

1.0.1

  • Add Assoc Const and Tagged instances