Hmm... either I'm misunderstanding you or that's not what I need.  I want
to make a call from C, presumably using rb_funcall, to a method
(defined elsewhere) that is expecting a block.

For now I've simply resorted to an rb_eval_string hack.

 On Sun, 21 Jan 2001, ts wrote:

>  If you put "&" at the end ruby will  do :
> 
>     if (*p == '&') {
>         var = va_arg(vargs, VALUE*);
>         if (rb_block_given_p()) {
>             *var = rb_f_lambda();
>         }
>         else {
>             *var = Qnil;
>         }
>         p++;
> 
>  This is exactly the same thing than when you write :
> 
>   def toto(a, b, &block)
> 
> 
> Guy Decoux
> 
> 
> 
>