lua-parser's Introduction

lua-parser

A Lua 5.3 parser and AST walker using ANTLR 3.

The grammar can be found in src/main/antlr3/nl/bigo/luaparser.

Seeing the generated parser in action can be done by building a fat JAR of the project and then running it to parse a Lua file.

Get started

1. clone this repository

git clone https://github.com/bkiers/lua-parser
cd lua-parser

2. generate the lexer and parser classes and build a fat JAR

mvn clean install package

3. parse a Lua file

java -jar target/lua-parser-0.1.0.jar src/main/lua/test.lua

which would print:

Parsing `src/main/lua/test.lua`...

'- CHUNK
   '- ASSIGNMENT
      |- VAR_LIST
      |  '- Name='uniqueid_some_event'
      '- EXPR_LIST
         '- FUNCTION
            |- PARAM_LIST
            |  '- Name='e'
            '- CHUNK
               |- If='if'
               |  '- CONDITION
               |     |- VAR
               |     |  |- Name='e'
               |     |  |- INDEX
               |     |  |  '- String='HasString'
               |     |  '- COL_CALL
               |     |     '- String='string1'
               |     '- CHUNK
               '- If='if'
                  '- CONDITION
                     |- VAR
                     |  |- Name='e'
                     |  |- INDEX
                     |  |  '- String='HasString'
                     |  '- COL_CALL
                     |     '- String='string2'
                     '- CHUNK

> from Lua52Walker.assignment
>   VAR_LIST=uniqueid_some_event
>   EXPR_LIST=FUNCTION

given that the file src/main/lua/test.lua contains:

function uniqueid_some_event (e)
  if (e:HasString("string1")) then
    -- do something
  end 
  if(e:HasString("string2")) then
    -- do something
  end
end

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lua-parser's Issues

Could you do Lua 5.3?

I need a Lua 5.3 parser in Java, but haven't been able to find one. I'd love to do it myself, but I'm not too good with this stuff. AFAIK the only syntax differences are only a few new operators: