happy

Happy is a parser generator for Haskell

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

Version on this page:	1.19.5@rev:1
LTS Haskell 24.18:	2.1.7
Stackage Nightly 2025-11-04:	2.1.7
Latest on Hackage:	2.1.7

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-1.19.5@sha256:d6a01f50aab2c480799b7d19643c5bb01891e01ac97aa892ffec3e6029a1446c,4181

Module documentation for 1.19.5

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.