#   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/>.
#
typeset -A a=( [\\]= [\"]= [\)]= ) b
for x in "${!a[@]}"; do b[$x]=; done
b+=([\`]= [\]]=)
typeset -p b
for x in "${!a[@]}"; do
  unset -v 'b[$x]'
done
typeset -p b

unset -v a b

loaddict()
{
    dict['"']=1
    dict['`']=2
    dict["'"]=3
    dict['\']=4
    declare -p dict
}

del()
{
	unset -v dict["$1"];
}

declare -A dict
loaddict
for k in "${!dict[@]}"; do del "$k"; done 
declare -p dict

unset 'dict[@]'

shopt -s assoc_expand_once
declare -A dict
loaddict
for k in "${!dict[@]}"; do del "$k"; done 
declare -p dict

unset a b dict

typeset -A a
b="80's"

((++a[$b]))

((++a["$b"]))
[[ $((++a[$b])) ]]
[[ $((++a["$b"])) ]]
echo ${a["$b"]}
echo ${a[$b]}

let "++a[$b]"

echo 'a[$b]=' "${a[$b]}"

unset a b

declare -A a
b="80's"

: ${a[$b]:='Depeche Mode'}

declare -p a

unset a b
shopt -u assoc_expand_once

typeset -A a
b="80's"

read a[$b] <<<"Depeche Mode"
typeset -p a

shopt -s assoc_expand_once
read a[$b] <<<"Depeche Mode"
typeset -p a

unset a
shopt -u assoc_expand_once

typeset -A a

printf -v a[$b] "%s" "Depeche Mode"
typeset -p a

shopt -s assoc_expand_once

printf -v a[$b] "%s" "Depeche Mode"
typeset -p a

unset a

declare -A a
x='$(date >&2)'
a[$x]=5

shopt -s assoc_expand_once
echo $((1+a[$x]))
echo $((1+a[\$x]))
echo "1+${a[$x]}"

declare -p a

shopt -s assoc_expand_once
declare -A myarray

declare myarray["foo[bar"]=bleh
myarray["foo"]=bleh

declare -p myarray

key='$(date >&2)'
declare -A aa
aa[$key]=foo
echo "${aa[$key]}"

[[ -v aa[$key] ]] || echo bad assoc expansion

shopt -u assoc_expand_once

declare -A assoc

var=x123
assoc['$var']=value

declare -p assoc

unset "assoc[$var]"
declare -p assoc

unset 'assoc[$var]'
declare -p assoc

shopt -s assoc_expand_once
unset 'assoc[$var]'
declare -p assoc

typeset -A foo

foo["foo]bar"]=bip
typeset foo["foo]bar"]=bax

echo ${!foo[@]}
echo ${foo[@]}

declare -p foo