#   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/>.
#
function f1
{
	typeset -n v=$1

	v=inside
}

v=global
f1 v
echo $v

unset v
unset -f f1

function foo
{
	typeset x=one

	typeset -n y=$1
	y=two
	echo inside: $x
}

foo x
echo outside: $x

function foo2
{
	typeset -n x=$1

	x=foo
}

foo2 x
echo $x

unset -f foo
function foo { typeset -n v=$1; v=local; }

v=global
foo v
echo $v

unset v

# invalid self reference at global scope
typeset -n v=v

# can we catch a circular self-reference?
typeset -n v=w
typeset -n w=x
typeset -n x=v

x=4
echo x = $x

unset -n v w x

# can we keep local variables invisible when we add nameref attribute?
function f { typeset x; typeset -n x; x=y; }
f