From: Harold Hausman <hhausman@...>
Date: 2007-02-17T23:46:39+09:00
Subject: Re: Using Ruby as an extension language

On 2/16/07, Farrel Lifson <farrel.lifson@gmail.com> wrote:
>
> Programming Ruby (Pragmatic Programmers) has a nice section on
> embedding Ruby. Also have a look at README.EXT in the Ruby source
> code.
>

Okay, I've read both these, and things are going nicely.
rb_eval_string seems much happier than ruby_options/ruby_run... (:

2 questions:

This seems like a nice replacement for luaL_dofile:
	rb_eval_string( "$: << Dir.getwd" );
	rb_eval_string( "require '.\\main.rb'" );

1. This appears to be working nicely, is there anything horribly wrong with it?

And my other question comes from when I try to expose a new method to
the running Ruby. Here are some snippets of my code:
VALUE rb_myprint( VALUE inSelf, VALUE inString )
{
	// snip... but do stuff here, etc....
	return Qnil;
}

and then later:
	rb_define_global_function( "myprint", rb_myprint, 1 );

2. When I try to compile this, I get the following error:
Error	2	error C2664: 'rb_define_global_function' : cannot convert
parameter 2 from 'VALUE (__cdecl *)(VALUE,VALUE)' to 'VALUE (__cdecl
*)(...)'	d:\code\littlecoder\littlecoder.cpp	68

I'm not familiar with the 'old-school' "C" "..." syntax, so I'm kind
of stuck here. If someone can fill me in on how to properly
define/declare these function pointers so I can pass them in that'd be
sweet.

Thanks again,
-Harold