Address some "unused lexical argument" warnings in erc

* erc/erc.el (erc-open-server-buffer-p): Actually use the `buffer' arg.
* erc/erc-backend.el (erc-server-process-alive): Take optional `buffer' arg.

* erc/erc-button.el (erc-button-click-button, erc-button-press-button):
Mark unused arguments.

4 files changed, 19 insertions, 10 deletions

diff --git a/lisp/erc/ChangeLog b/lisp/erc/ChangeLog
index 413969c31ec..93d958d765d 100644
--- a/lisp/erc/ChangeLog
+++ b/lisp/erc/ChangeLog
@@ -1,3 +1,11 @@
+2013-09-19  Glenn Morris  <rgm@gnu.org>
+
+	* erc-button.el (erc-button-click-button, erc-button-press-button):
+	Mark unused arguments.
+
+	* erc.el (erc-open-server-buffer-p): Actually use the `buffer' arg.
+	* erc-backend.el (erc-server-process-alive): Take optional `buffer' arg.
+
 2013-09-18  Glenn Morris  <rgm@gnu.org>
 
 	* erc-button.el (erc-button-add-buttons): Remove unused local vars.
diff --git a/lisp/erc/erc-backend.el b/lisp/erc/erc-backend.el
index 4200d4aff7f..4e11f9548b9 100644
--- a/lisp/erc/erc-backend.el
+++ b/lisp/erc/erc-backend.el
@@ -497,11 +497,12 @@ The current buffer is given by BUFFER."
                                                     erc-server-ping-handler)
                                               erc-server-ping-timer-alist)))))
 
-(defun erc-server-process-alive ()
-  "Return non-nil when `erc-server-process' is open or running."
-  (and erc-server-process
-       (processp erc-server-process)
-       (memq (process-status erc-server-process) '(run open))))
+(defun erc-server-process-alive (&optional buffer)
+  "Return non-nil when BUFFER has an `erc-server-process' open or running."
+  (with-current-buffer (or buffer (current-buffer))
+    (and erc-server-process
+         (processp erc-server-process)
+         (memq (process-status erc-server-process) '(run open)))))
 
 ;;;; Connecting to a server
 
diff --git a/lisp/erc/erc-button.el b/lisp/erc/erc-button.el
index 0edb771438a..751a35dfdff 100644
--- a/lisp/erc/erc-button.el
+++ b/lisp/erc/erc-button.el
@@ -407,7 +407,7 @@ REGEXP is the regular expression which matched for this button."
 ;; Since Emacs runs this directly, rather than with
 ;; widget-button-click, we need to fake an extra arg in the
 ;; interactive spec.
-(defun erc-button-click-button (ignore event)
+(defun erc-button-click-button (_ignore event)
   "Call `erc-button-press-button'."
   (interactive "P\ne")
   (save-excursion
@@ -416,7 +416,7 @@ REGEXP is the regular expression which matched for this button."
 
 ;; XEmacs calls this via widget-button-press with a bunch of arguments
 ;; which we don't care about.
-(defun erc-button-press-button (&rest ignore)
+(defun erc-button-press-button (&rest _ignore)
   "Check text at point for a callback function.
 If the text at point has a `erc-callback' property,
 call it with the value of the `erc-data' text property."
diff --git a/lisp/erc/erc.el b/lisp/erc/erc.el
index 771b7016bcd..4f719562c38 100644
--- a/lisp/erc/erc.el
+++ b/lisp/erc/erc.el
@@ -1312,13 +1312,13 @@ If BUFFER is nil, the current buffer is used."
     (and (eq major-mode 'erc-mode)
 	 (null (erc-default-target)))))
 
-(defun erc-open-server-buffer-p (&optional buffer) ;FIXME: `buffer' is ignored!
+(defun erc-open-server-buffer-p (&optional buffer)
   "Return non-nil if argument BUFFER is an ERC server buffer that
 has an open IRC process.
 
 If BUFFER is nil, the current buffer is used."
-  (and (erc-server-buffer-p)
-       (erc-server-process-alive)))
+  (and (erc-server-buffer-p buffer)
+       (erc-server-process-alive buffer)))
 
 (defun erc-query-buffer-p (&optional buffer)
   "Return non-nil if BUFFER is an ERC query buffer.