one-liner

Constraint-based generics

https://github.com/sjoerdvisscher/one-liner

Version on this page:	2.0
LTS Haskell 24.28:	2.1.1
Stackage Nightly 2026-01-19:	2.1.1
Latest on Hackage:	2.1.1

See all snapshots one-liner appears in

BSD-3-Clause licensed by Sjoerd Visscher, Xia Li-yao

Maintained by [email protected]

This version can be pinned in stack with:one-liner-2.0@sha256:ee320fac26c9a5e957b3f73b0b657b1c7bd4d43dd5e819e97625180fd9296205,1603

Module documentation for 2.0

Generics
- Generics.OneLiner

Depends on 8 packages(full list with versions):

base, bifunctors, contravariant, ghc-prim, linear-base, profunctors, tagged, transformers

Used by 1 package in lts-19.4(full list with versions):

one-liner-instances

Write short and concise generic instances of type classes. one-liner is particularly useful for writing default implementations of type class methods.