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

[ bsd3, development, program ] [ Propose Tags ]

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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Versions [faq] 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, 3.2.4
Change log CHANGELOG.md
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 <marlowsd@gmail.com>
Category Development
Home page http://www.haskell.org/alex/
Bug tracker https://github.com/simonmar/alex/issues
Source repo head: git clone https://github.com/simonmar/alex.git
Uploaded by SimonMarlow at Sat Sep 2 09:40:13 UTC 2017
Distributions Arch:3.2.4, Debian:3.2.4, Fedora:3.2.4, FreeBSD:3.1.4, LTSHaskell:3.2.4, NixOS:3.2.4, Stackage:3.2.4, openSUSE:3.2.4
Executables alex
Downloads 109051 total (1095 in the last 30 days)
Rating 2.0 (votes: 1) [estimated by rule of succession]
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Status Hackage Matrix CI
Docs not available [build log]
Last success reported on 2017-09-02 [all 3 reports]

Flags

NameDescriptionDefaultType
small_base

Choose the new smaller, split-up base package.

EnabledAutomatic

Use -f <flag> to enable a flag, or -f -<flag> to disable that flag. More info

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Maintainer's Corner

For package maintainers and hackage trustees


Readme for alex-3.2.2

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Alex: A Lexical Analyser Generator

Build Status

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

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

http://hackage.haskell.org/package/alex

Alex is built using Cabal. First install GHC and cabal-install, then:

$ cabal configure
$ cabal build
$ cabal 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 '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 at https://github.com/simonmar/alex/issues

Share and enjoy,

Chris Dornan: cdornan@arm.com

Isaac Jones: ijones@syntaxpolice.org

Simon Marlow: simonmar@microsoft.com