From: Jason Voegele <jason@...>
Date: 2001-11-08T00:11:11+09:00
Subject: [ruby-talk:24525] Re: C Extension Help

> In message "[ruby-talk:24465] C Extension Help"
>     on 01/11/07, Jason Voegele <jason@jvoegele.com> writes:
> 
> |I'm trying to write some additional collection classes for Ruby, such
> |as Sets, Trees, Bags, Linked Lists, etc.  I've got a working Ruby
> |version for some of them, but I'm currently attempting to implement a
> |Set (backed by a Ruby Hash) as a C extension, but I'm not much of a C
> |programmer and I got a run-time error I can't figure out.
> 
> rb_iterate calls block_proc with arguments (element, arg), so that
> set_add is called as set_add(element, 0).
> 
> So I modified your source to:
[snip source]

Thanks, matz, that does seem to work.

I've got another question though: how do I create a new instance of Set 
from C?  The docs I've read on this indicate using the Data_Make_Struct
(...) or Data_Wrap_Struct(...) functions, but I don't have a struct for my 
extension.  The only instance variable I have in my extension is the Ruby 
Hash that stores the set elements, and that's set with the rb_iv_set(...) 
function.

Any pointers?

Thanks,
Jason Voegele