alex: Alex is a tool for generating lexical analysers in Haskell

[ bsd3, development, program ] [ Propose Tags ]
Versions 2.1.0, 2.2, 2.3, 2.3.1, 2.3.2, 2.3.3, 2.3.4, 2.3.5, 3.0, 3.0.1, 3.0.2, 3.0.3, 3.0.4, 3.0.5, 3.1.0, 3.1.1, 3.1.2, 3.1.3, 3.1.4, 3.1.5, 3.1.6, 3.1.7, 3.2.0, 3.2.1, 3.2.2, 3.2.3
Change log
Dependencies array, base (>=1.0 && <5), containers, directory, QuickCheck (>=2) [details]
License BSD-3-Clause
Copyright (c) Chis Dornan, Simon Marlow
Author Chris Dornan and Simon Marlow
Maintainer Simon Marlow <>
Category Development
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Source repo head: git clone
Uploaded by SimonMarlow at Fri Jan 8 09:34:29 UTC 2016
Distributions Arch:3.2.3, Debian:3.1.6, Fedora:3.2.3, FreeBSD:3.1.4, LTSHaskell:3.2.3, NixOS:3.2.3, Stackage:3.2.3, openSUSE:3.2.3
Executables alex
Downloads 103219 total (388 in the last 30 days)
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Status Docs not available [build log]
Last success reported on 2016-11-28 [all 3 reports]
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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++.

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Readme for alex-3.1.7

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		       Alex: A Lexical Analyser Generator

Alex is a Lex-like tool for generating Haskell scanners.  For complete
documentation, see the doc directory.

Alex is built using Cabal.  First install GHC, then:
  $ runhaskell Setup.lhs configure
  $ runhaskell Setup.lhs build
  $ runhaskell Setup.lhs install

Alex version 2.0 has changed fairly considerably since version 1.x,
and the syntax is almost completely different.  For a detailed list of
changes, see the release notes in the documentation.

Alex is now covered by a BSD-Style licence; see the licence file in
the `doc' directory for details.

The sources are in the the `src' directory and the documentation in the `doc'
directory; various  examples are in the 'examples' subdirectory.

The source code in the 'src' and 'examples' directories is intended
for a Haskell 98 compiler with hierarchical modules.  It should work
with GHC >= 5.04.

Please report any bugs or comments to the email addresses given below.

Share and enjoy,

Chris Dornan:
Isaac Jones:
Simon Marlow: