Hi,
I don't see the point why Scheme provides the general `and' and `or' as
primitive macros (which does stand in our way when we wanna (apply and
things) instead of primitive procedures. For efficiency? I don't think there
would be much compared to the following definitions:
(define (gand . l) ; 'g'eneral 'and'
(define (iand l)
(if (null? l)
#t
(let ((b (car l))
(bs (cdr l)))
(cond ((null? bs) b)
(b (iand bs))
(else #f)))))
(iand l))
(define (gor . l) ; 'g'eneral 'or'
(define (ior l)
(if (null? l)
#f
(let ((b (car l))
(bs (cdr l)))
(cond ((null? bs) b)
(b b)
(else (ior bs))))))
(ior l))
If anyone can give a reasonable explanation, I may buy it. Otherwise, I will
go with my version in the future. And I suggest Guile or the standard
committee fix this annoying `bug' of Scheme.
Finally, Merry Christmas and Happy New Year to all us Guile users, and Guile
developers. We look forward the final 2.0 release of Guile in the coming new
year.
Best wishes,
--
DAY
