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# 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/>.
#
var=$'\01\02\03\177'
bar=${unset:-$var}
recho "$bar"
unset -v bar
bar=${unset:-"$var"}
recho "$bar"
foo=${parameter:=$var}
recho "$foo"
recho "$parameter"
unset -v foo parameter
foo=${parameter:="$var"}
recho "$foo"
recho "$parameter"
unset -v foo parameter
foo="${parameter:=$var}"
recho "$foo"
recho "$parameter"
unset -v foo parameter
recho ${parameter:=a\ b}
unset -v parameter
recho ${parameter:="a b"}
unset -v parameter
v='a b'
recho ${parameter:=$v}
unset -v parameter
recho ${parameter:="$v"}
unset -v parameter
# unsetting IFS here
set " abc " " def ghi " "jkl "
unset -v IFS var
var=${var-$*}/${var-$*}
printf '[%s]\n' "$var"
unset -v var
: ${var=$*}
printf '[%s]\n' "$var"
unset -v var
: ${var:=$*/$*/${var-$*}}
printf '[%s]\n' "$var"
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