Remove Scanner in favor of ScanCmd.

command.go

@@ -683,12 +683,14 @@ type ScanCmd struct {
 
 	page   []string
 	cursor uint64
+
+	process func(cmd Cmder) error
 }
 
-func NewScanCmd(args ...interface{}) *ScanCmd {
-	cmd := newBaseCmd(args)
+func NewScanCmd(process func(cmd Cmder) error, args ...interface{}) *ScanCmd {
 	return &ScanCmd{
-		baseCmd: cmd,
+		baseCmd: newBaseCmd(args),
+		process: process,
 	}
 }
 
@@ -709,6 +711,13 @@ func (cmd *ScanCmd) readReply(cn *pool.Conn) error {
 	return cmd.err
 }
 
+// Iterator creates a new ScanIterator.
+func (cmd *ScanCmd) Iterator() *ScanIterator {
+	return &ScanIterator{
+		cmd: cmd,
+	}
+}
+
 //------------------------------------------------------------------------------
 
 type ClusterNode struct {