#   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/>.
#
# post-bash-4.3 changes for more ksh93 compatibility when following nameref
# chains and using typeset/declare -n to operate on nameref variables rather
# than the variables they reference

# don't follow nameref chain when using declare -n and at the global scope
unset -n r1 r2

typeset -n r1=r2
typeset -n r2=x
typeset -n r1=y

typeset -p r1 r2 x y

# same behavior when in a shell function
foo()
{
	typeset -n r1=r2
	typeset -n r2=x
	typeset -n r1=y

	typeset -p r1 r2 x y
}
unset -n r1 r2
foo
unset -f foo

# same behavior when namerefs aren't chained
unset -n r1 r2

typeset -n r1=z
typeset -n r2=x
typeset -n r1=y
typeset -p r1 r2 x y

# same behavior when referenced variables have values
unset -n r1 r2

x=one
y=two
typeset -n r1=r2
typeset -n r2=x
typeset -n r1=y

typeset -p r1 r2 x y