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Re: [MIT-Scheme-devel] [PATCH] Implement DIRED-UP-DIRECTORY

From: Taylor R Campbell
Subject: Re: [MIT-Scheme-devel] [PATCH] Implement DIRED-UP-DIRECTORY
Date: Fri, 24 Apr 2015 17:13:54 +0000
User-agent: IMAIL/1.21; Edwin/3.116; MIT-Scheme/9.1.99

   Date: Thu, 23 Apr 2015 22:36:32 -0400
   From: Rich Loveland <address@hidden>

   In the attached patch, I've implemented the DIRED-UP-DIRECTORY command
   for Edwin, and bound it to #\^ as found in that other Emacs.

   Please let me know if there's a better way of specifying "the next
   directory up" than just merging the current directory with "..".  I
   read through the manual section on pathnames and the runtime pathname
   code but I might have missed it.

Probably something like:

(merge-pathnames (make-pathname #f #f '(RELATIVE UP) #f #f #f)
                 (directory-pathname (dired-current-pathname)))

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