dnl @ ../doc/m4.texinfo:5738: 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. regexp(`abc') dnl @error{}m4:stdin:1: Warning: too few arguments to builtin `regexp' dnl @result{}0 regexp(`abc', `') dnl @result{}0 regexp(`abc', `', `\\def') dnl @result{}\def