From: ts <decoux@...>
Date: 2001-07-13T02:17:30+09:00
Subject: [ruby-talk:17741] Re: Ruby/C extension for module with nested classes

>>>>> "B" == Brett W Denner <Brett.W.Denner@lmco.com> writes:

B> 	require 'mkmf'
B> 	create_makefile('Fruit')

 ruby call only *one* Init_ method for the extension, and in your case this
 is Init_Fruit 

[...]

 remove your Init_Apple

B> 	void Init_Apple() {
B> 	    cApple = rb_define_class_under(cFruit, "Apple", rb_cObject);
B> 	    rb_define_method(cApple, "initialize", s_init, 0);
B> 	    fprintf(stderr, "Init_Apple\n");
B> 	}

 Write it like this

   #include "ruby.h"
   #include <stdio.h>
   
   static VALUE s_init(VALUE self) { return self; }
   
   VALUE cFruit;
   VALUE cApple;
   
   void Init_Fruit() {
       cFruit = rb_define_module("Fruit");
       fprintf(stderr, "Init_Fruit\n");
       cApple = rb_define_class_under(cFruit, "Apple", rb_cObject);
       rb_define_method(cApple, "initialize", s_init, 0);
       fprintf(stderr, "Init_Apple\n");
   }



Guy Decoux