dnl @ ../doc/m4.texi:1517: Origin of test dnl @ expected status: 0 dnl @ extra options: dnl @ Copyright (C) 2006, 2007, 2008, 2009 Free Software dnl @ Foundation, Inc. dnl @ This file is free software; the Free Software Foundation dnl @ gives unlimited permission to copy and/or distribute it dnl @ with or without modifications, as long as this notice dnl @ is preserved. define(`x1', `len(`$1'') dnl @result{} define(`y1', ``$1')') dnl @result{} x1(`01234567890123456789')y1(`98765432109876543210') dnl @result{}40