#   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/>.
#

# bash versions up to and including bash-5.1 expanded these subscripts more
# than once

declare -A A

A["Darwin"]=darjeeling
A['$(echo Darwin ; echo stderr>&2)']=darjeeling

declare -p A

echo ${A[$(echo Darwin ; echo stderr>&2)]//eel/shark}
echo ${A['$(echo Darwin ; echo stderr>&2)']//eel/shark}

echo ${A[$(echo Darwin ; echo stderr>&2)]:0:4}
echo ${A['$(echo Darwin ; echo stderr>&2)']:0:4}

echo ${A[$(echo Darwin ; echo stderr>&2)]^^}
echo ${A['$(echo Darwin ; echo stderr>&2)']^^}

echo ${A[$(echo Darwin ; echo stderr>&2)]@Q}
echo ${A['$(echo Darwin ; echo stderr>&2)']@Q}

echo ${A[$(echo Darwin ; echo stderr>&2)]%ing}
echo ${A['$(echo Darwin ; echo stderr>&2)']%ing}

echo ${#A[$(echo Darwin ; echo stderr>&2)]}
echo ${#A['$(echo Darwin ; echo stderr>&2)']}

echo ${A[$(echo Darwin ; echo stderr>&2)]:-value}
echo ${A['$(echo Darwin ; echo stderr>&2)']:-value}

echo ${A[$(echo Darwin ; echo stderr>&2)]:+set}
echo ${A['$(echo Darwin ; echo stderr>&2)']:+set}

echo ${A[$(echo Darwin ; echo stderr>&2)]:+set}
echo ${A['$(echo Darwin ; echo stderr>&2)']:+set}

darjeeling=7*6
Darwin=7*4

echo $(( ${A[$(echo Darwin ; echo stderr>&2)]} ))
echo $(( ${A['$(echo Darwin ; echo stderr>&2)']} ))