Introduce a function to CC Mode which displays the current function name

Remove an erroneous interactive specification from two functions.

* lisp/progmodes/cc-cmds.el (c-display-defun-name): New command.
(c-defun-name, c-cpp-define-name): Remove interactive specification.

* lisp/progmodes/cc-mode.el (c-mode-base-map): Add binding C-c C-z for the new
command.

* doc/misc/cc-mode.texi (Other Commands): Add documentation for the new
command.

1 files changed, 13 insertions, 0 deletions

diff --git a/doc/misc/cc-mode.texi b/doc/misc/cc-mode.texi
index c90f6d06bf6..09a86c888d3 100644
--- a/doc/misc/cc-mode.texi
+++ b/doc/misc/cc-mode.texi
@@ -1760,6 +1760,7 @@ file.  For commands that you can use to view the effect of your changes,
 see @ref{Indentation Commands} and @ref{Filling and Breaking}.
 
 For details of the @ccmode{} style system, see @ref{Styles}.
+
 @item @kbd{C-c :} (@code{c-scope-operator})
 @kindex C-c :
 @findex c-scope-operator
@@ -1768,6 +1769,18 @@ In C++, it is also sometimes desirable to insert the double-colon scope
 operator without performing the electric behavior of colon insertion.
 @kbd{C-c :} does just this.
 
+@item @kbd{C-c C-z} (@code{c-display-defun-name})
+@kindex C-c C-z
+@findex c-display-defun-name
+@findex display-defun-name (c-)
+Display the current function name, if any, in the minibuffer.
+Additionally, if a prefix argument is given, push the function name to
+the kill ring.  If there is no current function,
+@code{c-display-defun-name} does nothing.  In Emacs, you can use this
+command in the middle of an interactive search if you set the
+customizable option @code{isearch-allow-scoll} to non-@code{nil}.
+@xref{Not Exiting Isearch,,,emacs, GNU Emacs Manual}.
+
 @item @kbd{C-c C-\} (@code{c-backslash-region})
 @kindex C-c C-\
 @findex c-backslash-region