master 643990336f: Make *Help* display info about generalized variables

[Lars Ingebrigtsen]

branch: master
commit 643990336f4b5d7db13757d59479f445e59d6b3a
Author: Lars Ingebrigtsen <larsi@gnus.org>
Commit: Lars Ingebrigtsen <larsi@gnus.org>

    Make *Help* display info about generalized variables
    
    * lisp/help-fns.el (help-fns--generalized-variable): New function
    to document generalized variables.
---
 lisp/help-fns.el | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/lisp/help-fns.el b/lisp/help-fns.el
index 74e18285e6..e06f2dec5c 100644
--- a/lisp/help-fns.el
+++ b/lisp/help-fns.el
@@ -1155,6 +1155,15 @@ Returns a list of the form (REAL-FUNCTION DEF ALIASED 
REAL-DEF)."
 (add-hook 'help-fns-describe-function-functions #'help-fns--parent-mode)
 (add-hook 'help-fns-describe-function-functions #'help-fns--compiler-macro 100)
 
+(defun help-fns--generalized-variable (function)
+  (when (get function 'gv-expander)
+    (insert (format-message "  `%s' is also a " function)
+            (buttonize "generalized variable"
+                       (lambda (_) (info "(elisp)Generalized Variables")))
+            ".\n")))
+(add-hook 'help-fns-describe-function-functions
+          #'help-fns--generalized-variable)
+
 
 ;; Variables