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# 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/>.
#
f() { local -n a=$1; a=X; }
a=(0); f 'a[0]'
while [[ -v a ]]; do declare -p a; unset a; done
a=(0); f 'a'
while [[ -v a ]]; do declare -p a; unset a; done
b=(0); f 'b[0]'
while [[ -v a ]]; do typeset -p a; unset a; done
typeset -p b
b=(0); f 'a[0]'
while [[ -v a ]]; do typeset -p a; unset a; done
typeset -p b
add_X_echo()
{
typeset -n ref=$1
ref+=X
echo inside $ref
}
ref=
add_X_echo ref
echo outside "$ref"
unset ref
# same test, but assigning nameref variable circular reference directly
xxx_func()
{
typeset -n xxx=xxx
xxx=foo
declare -p xxx
echo $FUNCNAME: inside: xxx = $xxx
}
xxx=7
echo before: $xxx
xxx_func
echo after: $xxx
unset xxx
unset -f xxx_func
typeset -n ref=ref
typeset -n ref=re ref+=f
typeset -p ref
ref=4
typeset -p ref re
export ref
printenv ref
printenv re
unset ref ; unset -n ref
unset foo; unset -n foo
typeset -n foo=var[@]
typeset -p foo
typeset -n ref=var ref+=[@]
typeset -p ref
ref=42
typeset -n bar
bar=var[@]
typeset -p bar
bar=7
unset a b
unset -n a b
typeset -n a=b b
b=a[1]
typeset -p a b
a=foo
typeset -p a b
unset a
typeset -n a=b
declare a=foo
typeset -p a b
unset n v
unset -n n v
v=(0 1)
typeset -n n=v
unset n[0]
typeset -p n v
unset -n n
v=(0 1)
typeset -n n=v
unset -n n
typeset -p n v
v=(0 1)
declare -n n=v[1]
unset n
declare -p n v
declare -n xref
declare -a xref[1]=one
declare -p xref
unset xref
declare -n xref
xref=array
declare -a xref[1]=one
declare -p xref
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