dnl @ ../doc/m4.texi:2801: 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(`foo', `ifelse(`$#', `0', ``$0'', `arguments:$#')')
dnl @result{}
foo
dnl @result{}foo
foo()
dnl @result{}arguments:1
foo(`a', `b', `c')
dnl @result{}arguments:3