From 53c1fa0f50c9468f4696fe1dc27b510a8d0a704c Mon Sep 17 00:00:00 2001
From: Dave Love <fx@gnu.org>
Date: Mon, 22 May 2000 19:35:34 +0000
Subject: [PATCH] (feature-symbols, file-provides, file-requires): Use mapc.
 (feature-file): Avoid calling symbol-name.  Doc fix. (file-set-intersect,
 file-dependents): Use dolist, not mapcar. (loadhist-hook-functions): Add
 mouse-position-function. (unload-feature): Change uses of mapcar.

---
 lisp/loadhist.el | 90 ++++++++++++++++++++++++++------------------------------
 1 file changed, 42 insertions(+), 48 deletions(-)

diff --git a/lisp/loadhist.el b/lisp/loadhist.el
index 47863f06d0a..b6721caf074 100644
--- a/lisp/loadhist.el
+++ b/lisp/loadhist.el
@@ -1,9 +1,9 @@
 ;;; loadhist.el --- lisp functions for working with feature groups
 
-;; Copyright (C) 1995, 1998 Free Software Foundation, Inc.
+;; Copyright (C) 1995, 1998, 2000 Free Software Foundation, Inc.
 
 ;; Author: Eric S. Raymond <esr@snark.thyrsus.com>
-;; Version: 1.0
+;; Maintainer: FSF
 ;; Keywords: internal
 
 ;; This file is part of GNU Emacs.
@@ -34,72 +34,65 @@
 (defun feature-symbols (feature)
   "Return the file and list of symbols associated with a given FEATURE."
    (catch 'foundit
-     (mapcar
-      (function (lambda (x) 
-		  (if (member (cons 'provide feature) (cdr x))
-		      (throw 'foundit x))))
-      load-history)
+     (mapc (lambda (x)
+	     (if (member (cons 'provide feature) (cdr x))
+		 (throw 'foundit x)))
+	   load-history)
      nil))
 
 (defun feature-file (feature)
   "Return the file name from which a given FEATURE was loaded.
 Actually, return the load argument, if any; this is sometimes the name of a
-Lisp file without an extension.  If the feature came from an eval-buffer on
-a buffer with no associated file, or an eval-region, return nil."
+Lisp file without an extension.  If the feature came from an `eval-buffer' on
+a buffer with no associated file, or an `eval-region', return nil."
   (if (not (featurep feature))
-      (error "%s is not a currently loaded feature" (symbol-name feature))
+      (error "%S is not a currently loaded feature" feature)
     (car (feature-symbols feature))))
 
 (defun file-provides (file)
   "Return the list of features provided by FILE."
-  (let ((symbols (cdr (assoc file load-history))) (provides nil))
-    (mapcar
-     (function (lambda (x)
-		 (if (and (consp x) (eq (car x) 'provide))
-		     (setq provides (cons (cdr x) provides)))))
-     symbols)
-    provides
-    ))
+  (let ((symbols (cdr (assoc file load-history)))
+	provides)
+    (mapc (lambda (x)
+	    (if (and (consp x) (eq (car x) 'provide))
+		(setq provides (cons (cdr x) provides))))
+	  symbols)
+    provides))
 
 (defun file-requires (file)
   "Return the list of features required by FILE."
-  (let ((symbols (cdr (assoc file load-history))) (requires nil))
-    (mapcar
-     (function (lambda (x)
-		 (if (and (consp x) (eq (car x) 'require))
-		     (setq requires (cons (cdr x) requires)))))
-     symbols)
-    requires
-    ))
-
-(defun file-set-intersect (p q)
-  ;; Return the set intersection of two lists
+  (let ((symbols (cdr (assoc file load-history)))
+	requires)
+    (mapc (lambda (x)
+	    (if (and (consp x) (eq (car x) 'require))
+		(setq requires (cons (cdr x) requires))))
+	  symbols)
+    requires))
+
+(defsubst file-set-intersect (p q)
+  "Return the set intersection of two lists."
   (let ((ret nil))
-    (mapcar
-     (function (lambda (x) (if (memq x q) (setq ret (cons x ret)))))
-     p)
-    ret
-    ))
+    (dolist (x p ret)
+      (if (memq x q) (setq ret (cons x ret))))
+    ret))
 
 (defun file-dependents (file)
   "Return the list of loaded libraries that depend on FILE.
 This can include FILE itself."
-  (let ((provides (file-provides file)) (dependents nil))
-    (mapcar
-     (function (lambda (x) 
-		 (if (file-set-intersect provides (file-requires (car x)))
-		     (setq dependents (cons (car x) dependents)))))
-     load-history)
-    dependents
-    ))
+  (let ((provides (file-provides file))
+	(dependents nil))
+    (dolist (x load-history dependents)
+      (if (file-set-intersect provides (file-requires (car x)))
+	  (setq dependents (cons (car x) dependents))))
+    dependents))
 
 (defun read-feature (prompt)
   "Read a feature name \(string\) from the minibuffer.
 Prompt with PROMPT and completing from `features', and
 return the feature \(symbol\)."
   (intern (completing-read prompt
-			   (mapcar (function (lambda (feature)
-					       (list (symbol-name feature))))
+			   (mapcar (lambda (feature)
+				     (list (symbol-name feature)))
 				   features)
 			   nil t)))
 
@@ -110,6 +103,7 @@ before-change-functions blink-paren-function
 buffer-access-fontify-functions command-line-functions
 comment-indent-function kill-buffer-query-functions
 kill-emacs-query-functions lisp-indent-function
+mouse-position-function
 redisplay-end-trigger-functions temp-buffer-show-function
 window-scroll-functions window-size-change-functions
 write-region-annotate-functions)
@@ -158,10 +152,10 @@ is nil, raise an error."
                       (string-match "-hooks?\\'" (symbol-name x)))
                  (and (fboundp x)       ; Known abnormal hooks etc.
                       (memq x loadhist-hook-functions)))
-             (mapcar (lambda (y) (remove-hook x y))
-                     (cdr flist))))))
-    (mapcar
-     (lambda (x) 
+	     (dolist (y (cdr flist))
+	       (remove-hook x y))))))
+    (mapc
+     (lambda (x)
        (cond ((stringp x) nil)
              ((consp x)
               ;; Remove any feature names that this file provided.
-- 
2.11.4.GIT