Re: evaluating numbers

[Robert Pluim <rpluim@gmail.com>]

>>>>> On Thu, 14 Nov 2019 20:39:44 +0200, Eli Zaretskii <eliz@gnu.org> said:

    Eli> The right way of doing this is "C-u C-x =".  And if we think that this
    Eli> shows way too much info, I'm OK with modifying "C-x =" to show the
    Eli> character name as an optional feature.  These are commands that were
    Eli> specifically designed to describe text; doing that as part of integer
    Eli> evaluation is too general for that.

I like my bikesheds painted in #ff7f00

(what-cursor-position could definitely benefit from some refactoring
of those format strings).

diff --git a/lisp/simple.el b/lisp/simple.el
index e3ac709408..a9d2a152dc 100644
--- a/lisp/simple.el
+++ b/lisp/simple.el
@@ -1389,6 +1389,12 @@ line-number-at-pos
         (forward-line 0)
         (1+ (count-lines start (point)))))))
 
+(defcustom what-cursor-show-names nil
+  "Whether to show character names in `what-cursor-position'."
+  :type 'boolean
+  :version "27.1"
+  :group 'editing-basics)
+
 (defun what-cursor-position (&optional detail)
   "Print info on cursor position (on screen and within buffer).
 Also describe the character after point, and give its character code
@@ -1404,6 +1410,9 @@ what-cursor-position
 in *Help* buffer.  See also the command `describe-char'."
   (interactive "P")
   (let* ((char (following-char))
+         (char-name-fmt (if what-cursor-show-names
+                            (format ", ?\\N{%s}" (get-char-code-property char 'name))
+                          ""))
 	 (bidi-fixer
 	  ;; If the character is one of LRE, LRO, RLE, RLO, it will
 	  ;; start a directional embedding, which could completely
@@ -1449,7 +1458,7 @@ what-cursor-position
 	    (setq coding (default-value 'buffer-file-coding-system)))
 	(if (eq (char-charset char) 'eight-bit)
 	    (setq encoding-msg
-		  (format "(%d, #o%o, #x%x, raw-byte)" char char char))
+		  (format "(%d, #o%o, #x%x%s, raw-byte)" char char char char-name-fmt))
 	  ;; Check if the character is displayed with some `display'
 	  ;; text property.  In that case, set under-display to the
 	  ;; buffer substring covered by that property.
@@ -1468,17 +1477,17 @@ what-cursor-position
 	  (setq encoding-msg
 		(if display-prop
 		    (if (not (stringp display-prop))
-			(format "(%d, #o%o, #x%x, part of display \"%s\")"
-				char char char under-display)
-		      (format "(%d, #o%o, #x%x, part of display \"%s\"->\"%s\")"
-			      char char char under-display display-prop))
+			(format "(%d, #o%o, #x%x%s, part of display \"%s\")"
+				char char char char-name-fmt under-display)
+		      (format "(%d, #o%o, #x%x%s, part of display \"%s\"->\"%s\")"
+			      char char char char-name-fmt under-display display-prop))
 		  (if encoded
-		      (format "(%d, #o%o, #x%x, file %s)"
-			      char char char
+		      (format "(%d, #o%o, #x%x%s, file %s)"
+			      char char char char-name-fmt
 			      (if (> (length encoded) 1)
 				  "..."
 				(encoded-string-description encoded coding)))
-		    (format "(%d, #o%o, #x%x)" char char char)))))
+		    (format "(%d, #o%o, #x%x%s)" char char char char-name-fmt)))))
 	(if detail
 	    ;; We show the detailed information about CHAR.
 	    (describe-char (point)))