Port chart.el methods to cl-generic.

cl-call-next-method cannot be used inside EIEIO's defmethod.
* lisp/emacs-lisp/chart.el: Require cl-generic at compile time.
* lisp/emacs-lisp/chart.el (initialize-instance, chart-draw):
(chart-draw-title, chart-size-in-dir, chart-draw-axis):
(chart-axis-draw, chart-translate-xpos, chart-translate-ypos):
(chart-translate-namezone, chart-draw-data, chart-add-sequence):
(chart-trim, chart-sort): Use cl-defmethod instead of defmethod.

lisp/emacs-lisp/chart.el

@@ -60,6 +60,7 @@
 ;; with all the bitmaps you want to use.
 
 (require 'eieio)
+(eval-when-compile (require 'cl-generic))
 
 ;;; Code:
 (define-obsolete-variable-alias 'chart-map 'chart-mode-map "24.1")
@@ -156,7 +157,7 @@ Returns the newly created buffer."
    )
   "Superclass for all charts to be displayed in an Emacs buffer.")
 
-(defmethod initialize-instance :AFTER ((obj chart) &rest _fields)
+(cl-defmethod initialize-instance :after ((obj chart) &rest _fields)
   "Initialize the chart OBJ being created with FIELDS.
 Make sure the width/height is correct."
   (oset obj x-width (- (window-width) 10))
@@ -201,7 +202,7 @@ Make sure the width/height is correct."
 	      :initform vertical))
   "Subclass for bar charts (vertical or horizontal).")
 
-(defmethod chart-draw ((c chart) &optional buff)
+(cl-defmethod chart-draw ((c chart) &optional buff)
   "Start drawing a chart object C in optional BUFF.
 Erases current contents of buffer."
   (save-excursion
@@ -221,19 +222,19 @@ Erases current contents of buffer."
     (message "Rendering chart...done")
     ))
 
-(defmethod chart-draw-title ((c chart))
+(cl-defmethod chart-draw-title ((c chart))
   "Draw a title upon the chart.
 Argument C is the chart object."
   (chart-display-label (oref c title) 'horizontal 0 0 (window-width)
 		       (oref c title-face)))
 
-(defmethod chart-size-in-dir ((c chart) dir)
+(cl-defmethod chart-size-in-dir ((c chart) dir)
   "Return the physical size of chart C in direction DIR."
   (if (eq dir 'vertical)
       (oref c y-width)
     (oref c x-width)))
 
-(defmethod chart-draw-axis ((c chart))
+(cl-defmethod chart-draw-axis ((c chart))
   "Draw axis into the current buffer defined by chart C."
   (let ((ymarg (oref c y-margin))
 	(xmarg (oref c x-margin))
@@ -247,7 +248,7 @@ Argument C is the chart object."
 		     ymarg (+ ymarg xlen)))
   )
 
-(defmethod chart-axis-draw ((a chart-axis) &optional dir margin zone start end)
+(cl-defmethod chart-axis-draw ((a chart-axis) &optional dir margin zone start end)
   "Draw some axis for A in direction DIR with MARGIN in boundary.
 ZONE is a zone specification.
 START and END represent the boundary."
@@ -257,7 +258,7 @@ START and END represent the boundary."
 					       1 0))
 		       start end (oref a name-face)))
 
-(defmethod chart-translate-xpos ((c chart) x)
+(cl-defmethod chart-translate-xpos ((c chart) x)
   "Translate in chart C the coordinate X into a screen column."
   (let ((range (oref (oref c x-axis) bounds)))
     (+ (oref c x-margin)
@@ -266,7 +267,7 @@ START and END represent the boundary."
 		    (float (- (cdr range) (car range))))))))
   )
 
-(defmethod chart-translate-ypos ((c chart) y)
+(cl-defmethod chart-translate-ypos ((c chart) y)
   "Translate in chart C the coordinate Y into a screen row."
   (let ((range (oref (oref c y-axis) bounds)))
     (+ (oref c x-margin)
@@ -276,7 +277,7 @@ START and END represent the boundary."
 		       (float (- (cdr range) (car range)))))))))
   )
 
-(defmethod chart-axis-draw ((a chart-axis-range) &optional dir margin zone _start _end)
+(cl-defmethod chart-axis-draw ((a chart-axis-range) &optional dir margin zone _start _end)
   "Draw axis information based upon a range to be spread along the edge.
 A is the chart to draw.  DIR is the direction.
 MARGIN, ZONE, START, and END specify restrictions in chart space."
@@ -313,7 +314,7 @@ MARGIN, ZONE, START, and END specify restrictions in chart space."
       (setq i (+ i j))))
 )
 
-(defmethod chart-translate-namezone ((c chart) n)
+(cl-defmethod chart-translate-namezone ((c chart) n)
   "Return a dot-pair representing a positional range for a name.
 The name in chart C of the Nth name resides.
 Automatically compensates for direction."
@@ -329,7 +330,7 @@ Automatically compensates for direction."
 	  (+ m -1 (round (* lpn (+ 1.0 (float n))))))
     ))
 
-(defmethod chart-axis-draw ((a chart-axis-names) &optional dir margin zone _start _end)
+(cl-defmethod chart-axis-draw ((a chart-axis-names) &optional dir margin zone _start _end)
   "Draw axis information based upon A range to be spread along the edge.
 Optional argument DIR is the direction of the chart.
 Optional arguments MARGIN, ZONE, START and END specify boundaries of the drawing."
@@ -368,7 +369,7 @@ Optional arguments MARGIN, ZONE, START and END specify boundaries of the drawing
 	    s (cdr s))))
 )
 
-(defmethod chart-draw-data ((c chart-bar))
+(cl-defmethod chart-draw-data ((c chart-bar))
   "Display the data available in a bar chart C."
   (let* ((data (oref c sequences))
 	 (dir (oref c direction))
@@ -413,7 +414,7 @@ Optional arguments MARGIN, ZONE, START and END specify boundaries of the drawing
       (setq data (cdr data))))
   )
 
-(defmethod chart-add-sequence ((c chart) &optional seq axis-label)
+(cl-defmethod chart-add-sequence ((c chart) &optional seq axis-label)
   "Add to chart object C the sequence object SEQ.
 If AXIS-LABEL, then the axis stored in C is updated with the bounds of SEQ,
 or is created with the bounds of SEQ."
@@ -445,7 +446,7 @@ or is created with the bounds of SEQ."
 
 ;;; Charting optimizers
 
-(defmethod chart-trim ((c chart) max)
+(cl-defmethod chart-trim ((c chart) max)
   "Trim all sequences in chart C to be at most MAX elements long."
   (let ((s (oref c sequences)))
     (while s
@@ -455,7 +456,7 @@ or is created with the bounds of SEQ."
       (setq s (cdr s))))
   )
 
-(defmethod chart-sort ((c chart) pred)
+(cl-defmethod chart-sort ((c chart) pred)
   "Sort the data in chart C using predicate PRED.
 See `chart-sort-matchlist' for more details."
   (let* ((sl (oref c sequences))