From: Jeff Mitchell <quixoticsycophant@...>
Date: 2004-06-23T03:54:08+09:00
Subject: Re: passing a block in an extension

--- Charles Mills <cmills@freeshell.org> wrote:
> I am trying to write a function in C which calls a Ruby function using 
> the block it was passed when called from Ruby.  Below is broken way to 
> do it, but it explains the idea better.
> 
> $ irb
> irb(main):001:0> require 'test'
> => true
> irb> my_method do |r|
> irb* 	puts r
> irb> end
> LocalJumpError: no block given
>          from (irb):4:in `each'
>          from (irb):4:in `my_method'
>          from (irb):4
> irb> exit
> $ more test.c
> #include <ruby.h>
> #include <intern.h>
> 
> VALUE
> my_method(VALUE kernel)
> {
>          VALUE ary = rb_ary_new();
>          VALUE str1 = rb_str_new2("hey");
>          VALUE str2 = rb_str_new2("hey you");
>          rb_ary_push(ary, str1);
>          rb_ary_push(ary, str2);
> 
>          //return rb_funcall(ary, rb_intern("each"), 0, 0);
           
           return rb_yield(ary);

> }
> 
> void Init_test()
> {
>          rb_define_module_function(rb_mKernel, "my_method", my_method, 
> 0);
> }



	
		
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