From: Mark Volkmann <mark@...>
Date: 2007-03-11T14:25:05+09:00
Subject: Re: creating Ruby objects from C

On Mar 10, 2007, at 11:11 PM, Mark Volkmann wrote:

> The following snippet of C code shows my attempt to create a Ruby  
> string object by invoking the "new" method on the Ruby String  
> class. I know it would be easier to do this using the rb_str_new or  
> rb_str_new2 functions. However, I'm trying to understand how to  
> create arbitrary Ruby objects from C using the "new" method. Can  
> you spot what's wrong with this code?
>
>   ID class_id = rb_intern("String");
>   VALUE stringClass = rb_const_get(rb_cClass, class_id); // wrong  
> 1st parameter?
>
>   ID method_id = rb_intern("new");
>   VALUE s1 = rb_funcall(stringClass, method_id, 1, "test");
>   printf("s1 = %s!\n", RSTRING(s1)->ptr);

I think I found the answer. Using rb_class_new_instance works and is  
much simpler that what I was attempting.