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= RubyLuaBridge - a seamless bridge between Ruby and Lua

RubyLuaBridge lets you access Lua from Ruby.  Eventually, support for accessing Ruby from Lua will be added.
This documentation assumes basic knowledge of Ruby[http://www.ruby-lang.org] and Lua[http://www.lua.org].

Relevant web pages:
* {BitBucket}[http://bitbucket.org/neomantra/rubyluabridge]

== Installation

RubyLuaBridge is a C extension that uses the actual Lua C library.  It currently targets Lua 5.1 and Ruby 1.9/2.0.  You must run:

   % ruby extconf.rb --with-lua-include=/path/to/lua/include --with-lualib=lualibname
   % make
   % sudo make install
 
There are extconf helpers for various platforms.  Run these instead of the 'ruby extconf.rb'.  Included are:
* build/extconf_osx.sh
* build/extconf_ubuntu.sh

== Basic Usage

Read about using {Lua in Ruby}[link:files/LUA_IN_RUBY.html].

NOT IMPLEMENTED YET, SUGGESTIONS ARE WELCOME.  Read about using {Ruby in Lua}[link:files/RUBY_IN_LUA.html].


== Design Philosophy

* simplest marshalling possible
* simplest API possible
* do more complicated things in Lua itself, rather than exposing them!
  For example, the coroutine library is not explicitly exposed because
  it can be handled all through eval and indexing:   <tt>l.coroutine.create(f)</tt>


== Ruby to Lua Type Mapping

*Ruby*:: *Lua*
nil::    nil
None::   nil
True::   true
False::  false
Fixnum:: number
Bignum:: number
Float::  number
String:: string
Symbol:: string
Hash::   new Lua::Table clone
Array::  new Lua::Table clone
everything else::  lightuserdata


== Lua to Ruby Type Mapping

*Lua*:: *Ruby*
none:: nil
nil:: nil
true:: True
false:: False
number:: Float
string:: String
table:: Lua::Table
lightuserdata:: Lua::RefObject
function:: Lua::RefObject
userdata:: Lua::RefObject
thread:: Lua::RefObject


== TODO

* package as gem
* stack trace in error callback
* how to get some external lua_State there?
* how to deal with .clone and .dup?
* accessing Ruby from Lua

== Credits

The following persons have contributed to RubyLuaBridge:
* Evan Wies (evan a neomantra d net)
* Roberto C. Sanchez (roberto at connexer d com)

RubyLuaBridge is inspired by, but not derived from:
* Lunatic Python [http://labix.org/lunatic-python]
* ruby-lua [http://raa.ruby-lang.org/project/ruby-lua]


== License

Licensed under the BSD License.  It is free software, and may be
redistributed under the terms specified in the accompanying LICENSE file, as follows:

Copyright (c) 2007, Evan Wies.  All rights reserved.
Copyright (c) 2014, Roberto C. Sanchez.  All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

* Redistributions of source code must retain the above copyright
  notice, this list of conditions and the following disclaimer.

* Redistributions in binary form must reproduce the above copyright
  notice, this list of conditions and the following disclaimer in the
  documentation and/or other materials provided with the distribution.

* Neither the name of the neomantra nor the names of its contributors may
  be used to endorse or promote products derived from this software without
  specific prior written permission.

THIS SOFTWARE IS PROVIDED BY Evan Wies ``AS IS'' AND ANY
EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL Evan Wies BE LIABLE FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.


== Support

Download the latest sources from {BitBucket}[http://bitbucket.org/neomantra/rubyluabridge]

Please use the mailing list and issue tracking features as well.