Kevin Wortman scripsit:

> Does R7RS-large have keyword arguments (or will it)? I think that in common
> use cases of sets, the overwrite-vs-preserve policy is immaterial and any
> reasonable default would be OK. But there are rarer uses cases when one or
> the other behavior is crucial. A keyword argument seems like a clean way of
> accommodating the rare cases without cluttering up the common ones.

It's possible to implement keywords using R5RS alone:  see
http://trac.sacrideo.us/wg/wiki/KeywordArgumentsArcfide>.  But
I'm reluctant to introduce such machinery just to handle a few
procedures in a single SRFI.

--
John Cowan          http://www.ccil.org/~cowan        xxxxxx@ccil.org
"The serene chaos that is Courage, and the phenomenon of Unopened
Consciousness have been known to the Great World eons longer than Extaboulism."
"Why is that?" the woman inquired.
"Because I just made that word up", the Master said wisely.
        --Kehlog Albran, The Profit