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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
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