dnl @ ../doc/m4.texi:2119: 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(`echo', `$@')dnl
echo(echo(`01234567890123456789', `01234567890123456789')
echo(`98765432109876543210', `98765432109876543210'))
dnl @result{}01234567890123456789,01234567890123456789
dnl @result{}98765432109876543210,98765432109876543210
len((echo(`01234567890123456789',
          `01234567890123456789')echo(`98765432109876543210',
                                      `98765432109876543210')))
dnl @result{}84
indir(`echo', indir(`echo', `01234567890123456789',
                            `01234567890123456789')
indir(`echo', `98765432109876543210', `98765432109876543210'))
dnl @result{}01234567890123456789,01234567890123456789
dnl @result{}98765432109876543210,98765432109876543210
define(`argn', `$#')dnl
define(`echo1', `-$@-')define(`echo2', `,$@,')dnl
echo1(`1', `2', `3') argn(echo1(`1', `2', `3'))
dnl @result{}-1,2,3- 3
echo2(`1', `2', `3') argn(echo2(`1', `2', `3'))
dnl @result{},1,2,3, 5