The language-lua package

[Tags:benchmark, bsd3, library, test]

Lua 5.3 lexer, parser and pretty-printer.

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Versions 0.1, 0.1.1, 0.1.2, 0.1.3, 0.1.4, 0.1.5, 0.1.6, 0.1.7, 0.2.0, 0.2.1, 0.2.2, 0.2.3, 0.3.0, 0.3.1, 0.4.1, 0.4.2, 0.4.3, 0.4.4, 0.4.5, 0.5.0, 0.6.0, 0.6.2,, 0.6.3,,, 0.7.0, 0.7.1, 0.8.0, 0.8.1, 0.9.0, 0.10.0 (info)
Change log
Dependencies array (>=0.4 && <0.6), base (>=4.5 && <4.10), bytestring (==0.10.*), deepseq, text (==1.2.*) [details]
License BSD3
Author Ömer Sinan Ağacan, Eric Mertens
Maintainer Eric Mertens <>
Category Language
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Source repository head: git clone git://
Uploaded Thu Aug 25 18:25:20 UTC 2016 by EricMertens
Distributions NixOS:0.10.0
Downloads 5024 total (86 in the last 30 days)
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Status Docs uploaded by user
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Readme for language-lua

Readme for language-lua-0.10.0

language-lua - Lua 5.3 lexer, parser and pretty-printer

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This package is just like any other language x packages. It provides lexer, parser and pretty-printer for Lua programming language.

Haddock documentation


This module provides 3 parsers.

  • chunk: Lua file parser.
  • exp: Lua expression parser.
  • stat: Lua statement parser.

Lexing is needed before running a parser. parseText function runs lexer before parsing. So if you want to parse a Lua expression, you can call parseText exp string, where string is the Lua expression to parse.

parseFile is a helper to parse Lua files. Example: parseFile "/path/to/lua/file". This is same as parseText chunk `fmap` readFile path.

Note that parseText may result with failure, so it's return type is Either ParserError a.


Lexer is not exported by top-level Language.Lua module. You need to import Language.Lua.Lexer. After that, llex string scans the string and returns token list. Tokens are defined in Language.Lua.Token.


Pretty-printer is still under development, and subject to lots of changes. It works, but lots of functionality will be added.

For now, you can use pprint syntax_tree to pretty-print a Lua syntax tree.