Re: pass by value / pass by reference

[Keisuke Nishida <kxn30 at po dot cwru dot edu>]

Keisuke Nishida <kxn30@po.cwru.edu> writes:

> One problem of my current implementation is that whenever one
> interpreter calls the other one, the arguments are converted
> into the other type; that is, they are passed by value.  This
> works fine for some cases, but sometimes it is necessary to pass
> them by reference.

Not exactly.  I mean:

 [ Value Model ]

           scheme-eval            lisp-eval
  Lisp obj ----------> Scheme obj --------> Lisp obj


 [ Reference Model ]

           scheme-eval            lisp-eval
  Lisp obj ----------> Lisp ptr   --------> Lisp obj
                    (as Scheme obj)

So, we are going to import all Lisp objects as pointers.