defined the value type Value_t to be interface{} in place of unsafe.Pointer

bin/main.go

@@ -16,8 +16,9 @@ func main() {
 		r      *bufio.Reader
 		c      rune
 		node   *pcl.Cnode_t
-		v      *string
-		err    error
+		v      pcl.Value_t
+
+		err error
 	)
 
 	if len(os.Args) != 2 {
@@ -73,7 +74,7 @@ func main() {
 	if v == nil {
 		panic("return value mut not be nil")
 	}
-	fmt.Printf("RETURN VALUE = [%s]\n", *v)
+	fmt.Printf("RETURN VALUE = [%s]\n", *v.(*string))
 
 	/*
 		err = interp.FeedRunes([]rune(`