#   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/>.
#
# a start at a test suite for what it means for an array to be set or unset and
# how to test that state
typeset -A A
A[a]=1
typeset -a a
a[1]=1

if [ -v A ]; then echo assoc 1; else echo assoc 1 unset; fi
if [ -v a ]; then echo array 1; else echo array 1 unset; fi

if [ -v "${A[@]}" ]; then echo assoc 2; else echo assoc 2 unset; fi
if [ -v "${a[@]}" ]; then echo array 2; else echo array 2 unset; fi

echo ${A-unset1}
echo ${a-unset2}

echo ${A[@]-unset3}
echo ${a[@]-unset4}

echo ${#A[@]}
echo ${#a[@]}

typeset -A B
typeset -a b

echo ${#B[@]}
echo ${#b[@]}

scalar1=foo
scalar2=

# this now checks for A[@] treating @ as a valid key - post-bash-5.1
if [ -v A[@] ]; then echo assoc A; else echo assoc A unset; fi
if [ -v a[@] ]; then echo array a; else echo array a unset; fi

if [ ${#A[@]} -gt 0 ]; then echo assoc A; else echo assoc A unset; fi
if [ ${#a[@]} -gt 0 ]; then echo array a; else echo array a unset; fi

if [ -v B[@] ]; then echo assoc B; else echo assoc B unset; fi
if [ -v b[@] ]; then echo array b; else echo array b unset; fi

if [ ${#B[@]} -gt 0 ]; then echo assoc B; else echo assoc B unset; fi
if [ ${#b[@]} -gt 0 ]; then echo array b; else echo array b unset; fi

if [ -v scalar1[@] ]; then echo scalar 1; else echo scalar 1 unset; fi
if [ -v scalar2[@] ]; then echo scalar 2; else echo scalar 2 unset; fi
if [ -v scalar3[@] ]; then echo scalar 3; else echo scalar 3 unset; fi

unset a A
declare -A assoc=([one]=one [two]=two [three]=three)
declare -a array=(one two three)

scalar="one two three"
scalar2=

recho "${scalar[@]}"

echo assoc: ${#assoc[@]}
echo array: ${#array[@]}

echo scalar: ${#scalar}
echo scalar: ${#scalar[@]}

echo scalar: ${#scalar2}
echo scalar: ${#scalar2[@]}

echo scalar: ${#scalar3}
echo scalar: ${#scalar3[@]}