blob: 579029172e8ea8619f54051eff599b1580b0d381 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
|
# nameref requires changes to unset
bar=one
typeset -n foo=bar
# normal unset unsets only variable nameref references
# need unset -n to unset nameref itself
unset foo
echo "expect <unset>"
recho ${bar-unset}
echo "expect <unset>"
recho ${foo-unset}
echo "expect <bar>"
recho ${!foo}
unset -n foo
echo "expect <unset>"
recho "${!foo-unset}"
readonly bar=two
typeset -n foo=bar
unset foo # this should fail because bar is readonly
echo "expect <two>"
echo ${bar-unset}
echo "expect <two>"
echo ${foo-unset}
# one question is what happens when you unset the underlying variable
qux=three
typeset -n ref
ref=qux
echo $ref
unset qux
echo ${ref-unset}
qux=four
echo ${ref-unset}
|
