From: "Iñaki Baz Castillo" <ibc@...>
Date: 2009-04-04T01:28:25+09:00
Subject: Re: Add a method as C extension to a class defined in Ruby

2009/4/3 Andre Nathan <andre@digirati.com.br>:
> On Sat, 2009-04-04 at 00:45 +0900, Iñaki Baz Castillo wrote:
>> Hi, in case I want to add a method (using C) for a class I've created
>> in pure Ruby, must I also create the class in C?
>
> Something like this should work:
>
> static VALUE
> rb_foo(VALUE self)
> {
>    rb_p(INT2FIX(42));
>    return Qnil;
> }
>
> void
> Init_foo(void)
> {
>    VALUE klass = rb_const_get(rb_cObject, rb_intern("Foo"));
>    rb_define_method(klass, "foo", rb_foo, 0);
> }
>
> Then you should be able to do
>
> class Foo; end
> require 'foo'
> Foo.new.foo


Thanks a lot!

-- 
Iñaki Baz Castillo
<ibc@aliax.net>