[r6rs-discuss] [Formal] Version reference syntax is overly complex.
r6rs at jdev.users.panix.com
Fri Jun 22 19:51:16 EDT 2007
On Fri, Jun 22, 2007 at 02:09:47PM -0700, Thomas Lord wrote:
> The discussion assumes that every execution environment will have
> some arbitrary set of libraries installed. Some of these will, per
> the proposals, have the same name but different version numbers.
> Programs will refer to libraries by giving a name and (in the general
> case) a union of ranges of version numbers. When run, the libraries
> selected will be the highest numbered within those ranges.
> So, install some new libraries in your environment and, voila,
> the meaning of your programs change.
Is that not the very purpose of a library system? It's only a problem
if that change is for the worse; thus, this seems more a problem of
human nature than anything R6 could hope to vanquish.
(let ((C call-with-current-continuation)) (apply (lambda (x y) (x y)) (map
((lambda (r) ((C C) (lambda (s) (r (lambda l (apply (s s) l)))))) (lambda
(f) (lambda (l) (if (null? l) C (lambda (k) (display (car l)) ((f (cdr l))
(C k))))))) '((#\J #\d #\D #\v #\s) (#\e #\space #\a #\i #\newline)))))
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