tests/dollar-at-star7.sub

   1 #   This program is free software: you can redistribute it and/or modify
   2 #   it under the terms of the GNU General Public License as published by
   3 #   the Free Software Foundation, either version 3 of the License, or
   4 #   (at your option) any later version.
   5 #
   6 #   This program is distributed in the hope that it will be useful,
   7 #   but WITHOUT ANY WARRANTY; without even the implied warranty of
   8 #   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   9 #   GNU General Public License for more details.
  10 #
  11 #   You should have received a copy of the GNU General Public License
  12 #   along with this program.  If not, see <http://www.gnu.org/licenses/>.
  13 #
  14 IFS=''                  # testing with only empty IFS
  15
  16 set -- this is a test
  17
  18 printf '|%s|\n' ${1+"$@"}
  19 echo
  20 printf '|%s|\n' "${1+$@}"
  21 echo
  22 printf '|%s|\n' "$@"
  23 echo
  24
  25 printf '|%s|\n' ${1-"$@"}
  26 printf '|%s|\n' "${1-$@}"
  27
  28 echo
  29 : ${foo:="$@"}
  30 printf '|%s|\n' "$foo"
  31
  32 unset foo
  33 : "${foo:=$@}"
  34 printf '|%s|\n' "$foo"
  35
  36 unset foo
  37 printf '|%s|\n' ${foo-"$@"}
  38 printf '|%s|\n' "${foo-$@}"