How to embed Ruby in C++?

Question 1

What's the best way to embed Ruby as a scripting language in C++? Using ruby.h? SWIG? Something else? What I need is to expose some C++ objects to Ruby and have the Ruby interpreter evaluate scripts that access these objects. I don't care about extending Ruby or accessing it in C++.

I've found thisarticle on embedding Ruby in C++, and while it's very useful, it's kinda old and I was wondering if there are any other resources on the subject (or open source implementations of similar engines).

Question 2

You can usemrubygithub.com/mruby/mruby now!

Question 3

Rice is looking very promising.

Question 4

Note to Windows users: Rice is only known to properly compile and run under Cygwin and Mingw. :(

Question 5

Ruby provides a very helpful README.EXT file. It has lots of information about how to extend Ruby, and convert between C & Ruby types.

There is also thisexcerpt from thepick axe book which pretty much covers the same thing.

In my case, when I added Ruby scripting to my application I decided against using swig, because my needs were very simple, and I didn't want to add yet another build dependency.

Question 6

swig is probablly the way to go..... but ruby doesnt embed too well......

if you want a language that embeds nicely into C++, try lua

Question 7

I did try lua, it's a wonderful language and was pretty easy to embed. Ruby is a requirement however, as I already have a lot of existing Ruby code I'd like to reuse.

Question 8

Yes even don#t try to embedd ruby and use it from a single thread in you multithreaded apps. They (the ruby programs) are changing signal handlers, envionrment variables, current directories etc. all the time.

Question 9

I realize this answer is half a decade old, but I should mention that Ruby is my favorite language to embed among JS, Lua, and Python. To those that might hesitate, I suggest readingruby-doc.org/docs/ProgrammingRuby/html/ext_ruby.html and trying a small example before dismissing it.

Question 10

I haven't looked at it for a long time, how does it handle multitasking? its big limitation was rubys implementation had a lot of globals meaning if you embed it and use it from multiple threads you get problems, as opposed to lua which was designed specifically to handle that situation.

Question 11

You might wish to check outtinyrb.

Question 12

I've been working on Rarity (https://github.com/Plaristote/Rarity), which does two things:

Generates Ruby bindings from a YML description of your C++ API
Allows interaction with Ruby script in the most C++ fashion there is

I've solved a good deal of question (exception handling, garbage collection)...I haven't seen anywhere else the code generation that Rarity uses to make your bindings come to life. I also haven't seen any other lib that allows such an easy conversion between C++ and Ruby types.

I think Rarity's worth the shot ! And I'd be glad to have some feedback as well :) !

Avdi 18.5k6 gold badges56 silver badges63 bronze badges · Accepted Answer · 2015-02-23 18:55:53Z

11

Rice is looking very promising.

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editedFeb 23, 2015 at 18:55

Sasha Chedygov

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answeredOct 27, 2008 at 16:01

Avdi

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1 Comment

Firas Assaad

Firas Assaad Over a year ago

Note to Windows users: Rice is only known to properly compile and run under Cygwin and Mingw. :(

2008-11-30T11:04:18.777Z+00:00

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