From: Jimmy Thrasher <jjthrash@...>
Date: 2001-09-26T06:18:05+09:00
Subject: [ruby-talk:21684] Re: Extension Question: Block Parameters

I'm pretty sure the following is correct:

Specify the parameter in your C function, e.g.

VALUE myrb_foo(int argc, VALUE* argv, VALUE self) {
  VALUE aBlock;
  rb_scan_args(argc, argv, "0&", &aBlock);
  return rb_funcall(self, rb_intern("bar"), 1, aBlock);
}

of course, the following might work:

VALUE myrb_foo(int argc, VALUE* argv, VALUE self) {
  return rb_funcall2(self, rb_intern("bar"), argc, argv);
}

Of course, you call rb_define_method in the right places..

Jimmy

Jason Voegele wrote:
> 
> When creating a Ruby extension in C, what is the C equivalent of the
> following construct?
> 
> def foo(&aBlock)
>    bar(&aBlock)
> end
> 
> # examples:
> foo
> foo {|obj| do_something}
> 
> If a block is provided, the foo method should pass along the block to
> the bar method.  I couldn't find any documentation on this.
> 
> Thanks,
> Jason Voegele