Re: [Chicken-users] TinyCLOS, builtin-classes, instantiation.

[Felix Winkelmann]

Johannes Groedem wrote:
> It's possible I've misunderstood something, but is this supposed to
> work, or are the builtin classes only meant to be used for
> generic method-dispatch?
>
> ;; test-case.scm:
> (require-extension tinyclos)
>
> (define-class <thread-hash> (<hash-table>)
>   (mutex))
>
> (make <thread-hash>)
> ;; EOF

There seems to be a default initialize-method missing.
<hash-table> does not inherit from <object>, but from
<primitive>. Try to add this snippet to tinyclos.scm:

(add-method initialize
  (make-method (list <primitive>)
    (lambda (call-next-method object initargs) object)))

(For example after the built-in classes are defined)

Why this code hangs without the default method isn't clear
to me. An error message is shown (but not completely),
when running under the debugger, so I assume since the
initialize method fails, the instance is in an inconsistent
state and printing it fails.


cheers,
felix