dnl @ ../doc/m4.texi:3062: 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.
undivert(`join.m4')dnl
dnl @result{}divert(`-1')
dnl @result{}# join(sep, args) - join each non-empty ARG into a single
dnl @result{}# string, with each element separated by SEP
dnl @result{}define(`join',
dnl @result{}`ifelse(`$#', `2', ``$2'',
dnl @result{}  `ifelse(`$2', `', `', ``$2'_')$0(`$1', shift(shift($@)))')')
dnl @result{}define(`_join',
dnl @result{}`ifelse(`$#$2', `2', `',
dnl @result{}  `ifelse(`$2', `', `', ``$1$2'')$0(`$1', shift(shift($@)))')')
dnl @result{}# joinall(sep, args) - join each ARG, including empty ones,
dnl @result{}# into a single string, with each element separated by SEP
dnl @result{}define(`joinall', ``$2'_$0(`$1', shift($@))')
dnl @result{}define(`_joinall',
dnl @result{}`ifelse(`$#', `2', `', ``$1$3'$0(`$1', shift(shift($@)))')')
dnl @result{}divert`'dnl