Implement some basic Lisp functions in terms of Common Lisp builtins. 2010-12-30 Aidan Kehoe <kehoea@parhasard.net> * simple.el (assoc-ignore-case): Remove a duplicate definition of this function (it's already in subr.el). * iso8859-1.el (char-width): On non-Mule, make this function equivalent to that produced by (constantly 1), but preserve its docstring. * subr.el (subst-char-in-string): Define this in terms of #'substitute, #'nsubstitute. (string-width): Define this using #'reduce and #'char-width. (char-width): Give this a simpler definition, it makes far more sense to check for mule at load time and redefine, as we do in iso8859-1.el. (store-substring): Implement this in terms of #'replace, now #'replace is cheap.

--- a/lisp/iso8859-1.el	Thu Dec 30 00:50:10 2010 +0000
+++ b/lisp/iso8859-1.el	Thu Dec 30 01:00:40 2010 +0000
@@ -84,6 +84,17 @@
 ;; by default.
 (setq-default ctl-arrow #xA0)
 
+(when (and (compiled-function-p (symbol-function 'char-width))
+	   (not (featurep 'mule)))
+  (defalias 'char-width
+    (let ((constantly (constantly 1)))
+     (make-byte-code (compiled-function-arglist constantly)
+		     (compiled-function-instructions constantly)
+		     (compiled-function-constants constantly)
+		     (compiled-function-stack-depth constantly)
+		     (compiled-function-doc-string
+		      (symbol-function 'char-width))))))
+
 ;; Shouldn't be necessary, but one file in the packages uses it:
 (provide 'iso8859-1)