one-liner

Constraint-based generics

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

LTS Haskell 24.60:	2.1.1
Stackage Nightly 2026-09-29:	2.1.1@rev:1
Latest on Hackage:	2.1.1@rev: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-2.1.1@sha256:a7dce923191e61918afb6ed8727c38452a4c7462b72963b08b7b20c5580a6946,1742

Module documentation for 2.1.1

Generics
- Generics.OneLiner

Depends on 7 packages(full list with versions):

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

Used by 1 package in nightly-2026-09-29(full list with versions):

unfoldable

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