Re: [Sbcl-devel] disassemble methods

[Christophe R. <cs...@ca...>]

"Nikodemus Siivola" <nik...@ra...> writes:

> Incidentally, does anyone know why do our fast functions have traps
> for arg-count and type errors for specializers? Surely they should
> never happen?

The method function can be retrieved and called using
(sb-mop:method-function <method>), and dispatches to the fast
function.  While internally to method dispatch and calling no
mismatches should occur, the user can provide arbitrary input to the
method function, so something needs to perform checks.

Example:
  (let ((d-o-package-t (find-method #'describe-object nil 
                                    (mapcar 'find-class '(package t)))))
    (funcall (sb-mop:method-function d-o-package-t) (list 1 2) nil))

Cheers,

Christophe