Re: scm_module_define ?

[Neil Jerram]

Han-Wen Nienhuys wrote:
> Why is module-define! not implemented using scm_module_define ?

Good question.  AFAICS, the difference between these reduces to the
difference (if any) between

[scm_define_module]
(variable-set! (module-make-local-var! module name) value)

and

[module-define!]
(or (module-local-variable ...)
    (let ((variable (make-variable value)))
      (module-add! module name variable)))

And the only difference between these appears to be in the case where
the module has a lazy binder: the scm_define_module code will call the
lazy binder with 3rd arg #t, whereas the module-define! code will call
it with 3rd arg #f.  I don't know if this difference matters, but I'd
guess not, as surely the point of a lazy binder is actually to do a
definition when asked for either a lookup or a definition.

What a mess this code is, though.  It feels as though if someone had the
patience, they could reduce it by 90% just by applying careful
mechanical transformations and removing duplication.

        Neil