one-liner

Constraint-based generics

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

Version on this page:	2.0@rev:1
LTS Haskell 24.17:	2.1@rev:1
Stackage Nightly 2025-11-01:	2.1@rev:1
Latest on Hackage:	2.1@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-2.0@sha256:7f797b4d00b6d73f63666122daf89991c74e89fbbeaa5aebf27c9d2ec7f23ca6,1675

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-19.32(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.