happy

Happy is a parser generator for Haskell

http://www.haskell.org/happy/

Version on this page:	1.19.4@rev:1
LTS Haskell 24.50:	2.1.7
Stackage Nightly 2026-07-17:	2.1.7
Latest on Hackage:	2.2.1

See all snapshots happy appears in

BSD-3-Clause licensed by Andy Gill and Simon Marlow

Maintained by Simon Marlow

This version can be pinned in stack with:happy-1.19.4@sha256:394b39b57e8a8a8d2052bc5f42e53f4880904619ef17f5cc98601b0ae132a824,4247

Module documentation for 1.19.4

There are no documented modules for this package.

Depends on 4 packages(full list with versions):

array, base, containers, mtl

Happy is a parser generator for Haskell. Given a grammar specification in BNF, Happy generates Haskell code to parse the grammar. Happy works in a similar way to the yacc tool for C.