-extern void tag(Arg arg); /* tags c with arg's index */
-extern void toggletag(Arg arg); /* toggles c tags with arg's index */
-extern void toggleview(Arg arg); /* toggles the tag with arg's index (in)visible */
-extern void view(Arg arg); /* views the tag with arg's index */
-extern void zoom(Arg arg); /* zooms the focused client to master area, arg is ignored */
+extern void tag(const char *arg); /* tags c with arg's index */
+extern void toggletag(const char *arg); /* toggles c tags with arg's index */
+extern void toggleview(const char *arg); /* toggles the tag with arg's index (in)visible */
+extern void view(const char *arg); /* views the tag with arg's index */