tests/nameref10.sub

#   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/>.
#
# testing behavior of command substitution as one of expansions performed by
# array subscripting; should behave the same directly as when done through
# a nameref

x[0]=42
zero=0
f() { typeset -n foo="$1"; declare -p foo; echo "$foo"; }

f 'x[$zero]'

x[$(echo 0)]=4
declare -p x

f 'x[$(echo 0)]'

unset -f f
f()
{
	typeset -n foo="$1";

	echo "x[i=0$(echo comsub >&2)]"
	echo "${x[i=0$(echo comsub >&2)]}"
	echo "${!1}"
	echo "$foo"
}

f 'x[i=0$(echo comsub >&2)]'

unset -f f
unset x

# problems with unset and namerefs pointing to non-existent variables pointed
# out after bash-4.3 released

typeset -n foo=somevariable
foo=bar
unset foo		# unsets somevariable
typeset -p foo somevariable
echo foo = $foo

typeset -A foo		# should create array variable named somevariable
foo["jug"]="brown"

typeset -p foo somevariable
typeset -A foo='([jug]="brown" )'
typeset -p foo somevariable

unset foo
typeset -p foo somevariable
unset -n foo
typeset -p foo somevariable

unset bar
typeset -n foo=bar
typeset -p foo bar
unset foo
typeset -p foo bar
typeset -i foo
foo=4+4
typeset -p foo bar
echo "$foo"

unset foo
typeset -p foo bar