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subr-x on older Emacsen

From: Sebastian Wiesner
Subject: subr-x on older Emacsen
Date: Tue, 15 Jul 2014 15:08:48 +0200


I’d like to use the new subr-x library in my Emacs Lisp projects, and I’m 
searching for advice on how to handle backwards compatibility.

As you know, subr-x was only recently introduced in Emacs trunk, and is not 
available in any Emacs release.  Currently, I simply copy those functions that 
I need into my code, guarding their definition with `(unless (features 'subr-x) 

This scales poorly across many projects, obviously, so I’d like to know if 
there is a better approach to handle this problem.  Is their a compatibility 
package for subr-x on GNU ELPA, similar to cl-lib?

Sebastian Wiesner

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