blob: 9fbacd4ffab8ad3f65a4843f3893712082bb5a3a (
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
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
|
f() { local -n a=$1; a=X; }
a=(0); f 'a[0]'
while [[ -v a ]]; do declare -p a; unset a; done
a=(0); f 'a'
while [[ -v a ]]; do declare -p a; unset a; done
b=(0); f 'b[0]'
while [[ -v a ]]; do typeset -p a; unset a; done
typeset -p b
b=(0); f 'a[0]'
while [[ -v a ]]; do typeset -p a; unset a; done
typeset -p b
add_X_echo()
{
typeset -n ref=$1
ref+=X
echo inside $ref
}
ref=
add_X_echo ref
echo outside "$ref"
unset ref
# same test, but assigning nameref variable circular reference directly
xxx_func()
{
typeset -n xxx=xxx
xxx=foo
declare -p xxx
echo $FUNCNAME: inside: xxx = $xxx
}
xxx=7
echo before: $xxx
xxx_func
echo after: $xxx
unset xxx
unset -f xxx_func
typeset -n ref=ref
typeset -n ref=re ref+=f
typeset -p ref
ref=4
typeset -p ref re
export ref
printenv ref
printenv re
unset ref ; unset -n ref
unset foo; unset -n foo
typeset -n foo=var[@]
typeset -p foo
typeset -n ref=var ref+=[@]
typeset -p ref
ref=42
typeset -n bar
bar=var[@]
typeset -p bar
bar=7
unset a b
unset -n a b
typeset -n a=b b
b=a[1]
typeset -p a b
a=foo
typeset -p a b
unset a
typeset -n a=b
declare a=foo
typeset -p a b
unset n v
unset -n n v
v=(0 1)
typeset -n n=v
unset n[0]
typeset -p n v
unset -n n
v=(0 1)
typeset -n n=v
unset -n n
typeset -p n v
v=(0 1)
declare -n n=v[1]
unset n
declare -p n v
|
