prettyprinter-combinators

Some useful combinators for the prettyprinter package

https://github.com/sergv/prettyprinter-combinators

Version on this page:	0.1.2
LTS Haskell 24.18:	0.1.3
Stackage Nightly 2025-11-03:	0.1.3
Latest on Hackage:	0.1.3

See all snapshots prettyprinter-combinators appears in

Apache-2.0 licensed by Sergey Vinokurov

Maintained by Sergey Vinokurov

This version can be pinned in stack with:prettyprinter-combinators-0.1.2@sha256:5b725a01c109472acabe8623159805db502a3248770848373706d311406feb50,1898

Module documentation for 0.1.2

Prettyprinter

Depends on 12 packages(full list with versions):

base, bimap, bytestring, containers, dlist, prettyprinter, pretty-show, syb, template-haskell, text, unordered-containers, vector

Used by 2 packages in nightly-2023-12-28(full list with versions):

emacs-module, toml-reader-parse

This is a set of utilities for the Haskell prettyrinter package. Most notable is automatic deriving of Pretty instance from the Generic instance, e.g.

{-# LANGUAGE DeriveGeneric #-}

import Prettyprinter.Generics

data Foo a b = Bar Int | Baz a b
  deriving (Generic)

instance (Pretty a, Pretty b) => Pretty (Foo a b) where
  pretty = ppGeneric

printed :: Doc ann
printed = pretty $ Baz (Bar 10 :: Foo () ()) [1..22]

which would put following into printed:

Changes

0.1.2

Fix build with GHC 9.8
Add PPGeneric newtype to apply ppGeneric through DerivingVia
Add PPShow newtype to apply ppShow through DerivingVia

0.1.1.1

ppVector and ppVectorWith now accept generic vectors
Add lower bound pretty-show >= 1.6