#   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/>.
#
# testing various combinations of quoted and unquoted expansions of $@, and
# whether they generate empty words after expansion

n() { echo "$#"; }

n "$@"
n ${foo-"$@"}
n "${foo-$@}"

n ""$@
n """$@"

n $(true)$@
n "$(true)$@"
n "$(true)$@"
n "$(true)""$@"

n $xxx$@
n "$xxx$@"
n $xxx"$@"
n "$xxx""$@"

recho $xxx"$@"
echo after 1

recho "$xxx$@"
echo after 2

recho ${foo:-$xxx"$@"}
echo after 3

# this is where these things start to differ
echo same as 1
recho "${foo:-$xxx"$@"}"
echo same as 2
recho "${foo:-$xxx$@}"

echo null fields
recho ""$@
recho """$@"

echo null fields in rhs
echo null string with unquoted '$@'
recho ${foo:-""$@}
echo null string with quoted '$@'
recho ${foo:-"""$@"}

echo assignment
recho "${foo=$@}"
echo variable
recho "$foo"
echo dollar-at
recho "${@}"