#   double
	#   char*     (TCL_STATIC char*)
	#   string    (TCL_DYNAMIC char*)
	#   dstring   (TCL_DYNAMIC char*)
	#   vstring   (TCL_VOLATILE char*)
	#   default   (Tcl_Obj*)
	#   wide
	switch -- $rtype {
		void - ok - int - long - float - double - wide {}
		default {
			append cbody "  if (rv == NULL) {\n"
			append cbody "    return(TCL_ERROR);\n"
			append cbody "  }\n"
		}
	}

	switch -- $rtype {
		void           { }
		ok             { append cbody "  return rv;" "\n" }
		int            { append cbody "  Tcl_SetIntObj(Tcl_GetObjResult(ip), rv);" "\n" }
		long           { append cbody "  Tcl_SetLongObj(Tcl_GetObjResult(ip), rv);" "\n" }
		float          -
		double         { append cbody "  Tcl_SetDoubleObj(Tcl_GetObjResult(ip), rv);" "\n" }