#   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/>.
#
# exporting namerefs and putting namerefs in temp env post bash-4.3

typeset -nx ref=var;
typeset -p ref

var=foo; str=''
printenv ref                 # var
ref+=$str    printenv ref    # var
ref+="$str"  printenv ref    # var
ref=$ref$str printenv ref    # var

export ref		# follows nameref and exports var

printenv var                 # foo
ref+=$str    printenv var    # foo
ref+="$str"  printenv var    # foo
ref=$ref$str printenv var    # foo

# none of these should change ref; should follow the nameref and export var
unset var; unset -n ref; typeset -n ref=var

echo before
typeset -p ref var

echo first
ref=xxx typeset -p ref var

echo invalid
var= ref=5 typeset -p ref var

echo after
typeset -p ref var

# ref isn't exported, so none of the printenvs should print anything
unset var ; unset -n ref
typeset -n ref=var;
typeset -p ref

var=foo; str=''
printenv ref
ref+=$str    printenv ref
ref+="$str"  printenv ref
ref=$ref$str printenv ref