alex: Alex is a tool for generating lexical analysers in Haskell
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++.
[Skip to Readme]
Flags
Automatic Flags
| Name | Description | Default |
|---|---|---|
| small_base | Choose the new smaller, split-up base package. | Enabled |
Use -f <flag> to enable a flag, or -f -<flag> to disable that flag. More info
Downloads
- alex-3.2.3.tar.gz [browse] (Cabal source package)
- Package description (as included in the package)
Maintainer's Corner
For package maintainers and hackage trustees
Candidates
| Versions [RSS] | 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, 3.2.5, 3.2.6, 3.2.7, 3.2.7.1, 3.2.7.2, 3.2.7.3, 3.2.7.4, 3.3.0.0, 3.4.0.0, 3.4.0.1, 3.5.0.0, 3.5.1.0 (info) |
|---|---|
| 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 2017-09-08T11:05:13Z |
| Distributions | Arch:3.2.7.4, Debian:3.2.5, Fedora:3.3.0.0, FreeBSD:3.1.4, LTSHaskell:3.4.0.1, NixOS:3.4.0.1, Stackage:3.5.1.0, openSUSE:3.5.0.0 |
| Reverse Dependencies | 1 direct, 0 indirect [details] |
| Executables | alex |
| Downloads | 167808 total (559 in the last 30 days) |
| Rating | 2.0 (votes: 1) [estimated by Bayesian average] |
| Your Rating | |
| Status | Docs not available [build log] Last success reported on 2017-09-08 [all 3 reports] |
Readme for alex-3.2.3
[back to package description]Alex: A Lexical Analyser Generator
Alex is a Lex-like tool for generating Haskell scanners. For complete documentation, see the doc directory.
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