alex

Alex is a tool for generating lexical analysers in Haskell

http://www.haskell.org/alex/

Version on this page:3.1.5
LTS Haskell 24.56:3.5.4.2
Stackage Nightly 2026-08-24:3.5.4.2
Latest on Hackage:3.5.4.2

See all snapshots alex appears in

BSD-3-Clause licensed by Chris Dornan and Simon Marlow
Maintained by Simon Marlow
This version can be pinned in stack with:alex-3.1.5@sha256:fa083459732b45882e12cad424e80d252ae686258d08f6d0e9e7c76baab7b15d,3281

Module documentation for 3.1.5

There are no documented modules for this package.

Alex is a tool for generating lexical analysers in Haskell. It takes a description of tokens based on regular expressions and generates a Haskell module containing code for scanning text efficiently. It is similar to the tool lex or flex for C/C++.

Changes in 3.1.5:

  • Generate less warning-laden code, and suppress other warnings.

  • Bug fixes.

Changes in 3.1.4:

  • Add Applicative/Functor instances for GHC 7.10

Changes in 3.1.3:

  • Fix for clang (XCode 5)

Changes in 3.1.2:

  • Add missing file to extra-source-files

Changes in 3.1.1:

  • Bug fixes (#24, #30, #31, #32)

Changes in 3.1.0:

  • necessary changes to work with GHC 7.8.1