From: Paul Brannan <pbranna@...>
Date: 2001-04-25T23:40:04+09:00
Subject: [ruby-talk:14225] Typechecking problem with ruby module for swig

Using Swig 1.3a5, I have noticed the following.  If I create a class

class Object {
    void bar();
};

in module A.i and I create a function

Object foo();

in another module B.i, Swig will try to redefine that class in the second
module (it makes a call to rb_define_class_under).  The problem with this
is that the Object returned from foo() cannot be used as a normal Object.
I can add the line

%extern A.i

to the B.i module, but then the Get_Object macro doesn't get defined,
and I have to code it by hand inside a %{ %} block.  What really needs to
be done is that if a data type was referenced in a %extern'd file, then
that data type should be retrieved with rb_const_get (this does require
all the files to be require'd in the correct order, though).

Is there a workaround other than writing my own macros and inserting the
rb_const_get with %init?  That's kinda messy and error prone.  I've
thought about adding a pragma to the ruby module, but it seems like this
should all occur transparently.

Any suggestions?  Thanks,

Paul