#   This program is free software: you can redistribute it and/or modify
#   it under the terms of the GNU General Public License as published by
#   the Free Software Foundation, either version 3 of the License, or
#   (at your option) any later version.
#
#   This program is distributed in the hope that it will be useful,
#   but WITHOUT ANY WARRANTY; without even the implied warranty of
#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#   GNU General Public License for more details.
#
#   You should have received a copy of the GNU General Public License
#   along with this program.  If not, see <http://www.gnu.org/licenses/>.
#
set -- 1 2

unset var
recho ${var-$@}
recho ${var-"$@"}
recho ${var-$*}
recho ${var-"$*"}

unset -v a b c d
recho ${a=$@}
recho "$a"
recho ${b="$@"}
recho "$b"
recho ${c=$*}
recho "$c"
recho ${d="$*"}
recho "$d"

IFS=
unset var
recho ${var-$@}
recho ${var-"$@"}
recho ${var-$*}
recho ${var-"$*"}

unset -v a b c d
# Posix interp 221
# there should never be any word splitting because IFS is null
recho ${a=$@}
recho "$a"
recho $a
recho ${b="$@"}
recho "$b"
recho $b
recho ${c=$*}
recho "$c"
recho $c
recho ${d="$*"}
recho "$d"
recho $d

unset -v a b c d
a=$@
recho $a
b="$@"
recho $b
c=$*
recho $c
d="$*"
recho $d

unset -v parameter a b c d