Faré wrote: > It's hopefully fixed in 1.725, except that somehow in the commit > message, I wrote pjb where I should have written jcb. Oops.
Thanks for the commit. And don't worry, I have been called worst... > > My "solution" to the "current-directory" thing was to rename it to > "default-directory". I am not sure I understand whether this really serves your purpose. "default-directory" and "current-directory" are two quite different concepts after all. I guess that now function "default-directory" is in a better position to declare itself correct by construction. But I still don't see what usefulness it will have on lisp systems that chose to not accept (truename #P"") as designating anything special (as, for one thing, the process current directory). Nothing in the ANSI CL standard mandates (truename #P"") to mean anything and I would even argue that assigning a meaning to (truename #P"") runs against the spirit of the ANSI CL text on truename... (I say this above in the context of *default-pathname-defaults* being #P"" itself.) Cheers, Jean-Claude Beaudoin > > [ François-René ÐVB Rideau | Reflection&Cybernethics | http://fare.tunes.org ] > You think you know when you can learn, are more sure when you can write, > even more when you can teach, but certain when you can program. > — Alan Perlis > > > > > On 18 May 2010 06:32, Jean-Claude Beaudoin > <jean.claude.beaud...@gmail.com> wrote: >> Here is a patch against 1.720 that fixes a weakness in merge-pathnames*. >> This was a show stopper in my system. >> >> It seems that merge-pathnames* assumes that *default-pathname-defaults* >> has some interesting value to contribute which is not always the case. >> In my system and in a few others (clisp comes to mind) the usual value >> of *default-pathname-defaults* is #P"" which ends up giving >> >> (pathname-directory *default-pathname-defaults*) => nil >> >> Then, (append nil (cdr directory)) is probably not a "valid pathname >> directory". >> In clisp passing this not so "valid pathname directory" to make-pathname will >> result in a visit in the debugger... >> >> I want also to insist again on the issue of accessing the process current >> directory. >> Assuming that *default-pathname-defaults* is a substitute for the process >> current >> directory is not portable ANSI Common Lisp code. The following definition is >> very >> likely to be wrong on at least one ANSI Common Lisp conforming >> implementation: >> >> (defun current-directory () >> (truenamize (pathname-directory-pathname *default-pathname-defaults*))) >> >> >> Cheers, >> >> Jean-Claude Beaudoin _______________________________________________ asdf-devel mailing list asdf-devel@common-lisp.net http://common-lisp.net/cgi-bin/mailman/listinfo/asdf-devel
