tests/nameref15.sub

   1 f() { local -n a=$1; a=X; }
   2
   3 a=(0); f 'a[0]'
   4 while [[ -v a ]]; do declare -p a; unset a; done
   5
   6 a=(0); f 'a'
   7 while [[ -v a ]]; do declare -p a; unset a; done
   8
   9 b=(0); f 'b[0]'
  10 while [[ -v a ]]; do typeset -p a; unset a; done
  11 typeset -p b
  12
  13 b=(0); f 'a[0]'
  14 while [[ -v a ]]; do typeset -p a; unset a; done
  15 typeset -p b
  16
  17 add_X_echo()
  18 {
  19         typeset -n ref=$1
  20         ref+=X
  21         echo inside $ref
  22 }
  23
  24 ref=
  25 add_X_echo ref
  26 echo outside "$ref"
  27 unset ref
  28
  29 # same test, but assigning nameref variable circular reference directly
  30 xxx_func()
  31 {
  32         typeset -n xxx=xxx
  33         xxx=foo
  34         declare -p xxx
  35         echo $FUNCNAME: inside: xxx = $xxx
  36 }
  37
  38 xxx=7
  39 echo before: $xxx
  40 xxx_func
  41 echo after: $xxx
  42
  43 unset xxx
  44 unset -f xxx_func
  45
  46 typeset -n ref=ref
  47
  48 typeset -n ref=re ref+=f
  49 typeset -p ref
  50 ref=4
  51 typeset -p ref re
  52
  53 export ref
  54 printenv ref
  55 printenv re
  56
  57 unset ref ; unset -n ref
  58 unset foo; unset -n foo
  59
  60 typeset -n foo=var[@]
  61 typeset -p foo
  62 typeset -n ref=var ref+=[@]
  63 typeset -p ref
  64
  65 ref=42
  66
  67 typeset -n bar
  68 bar=var[@]
  69 typeset -p bar
  70 bar=7
  71
  72 unset a b
  73 unset -n a b
  74
  75 typeset -n a=b b
  76 b=a[1]
  77 typeset -p a b
  78 a=foo
  79 typeset -p a b
  80
  81 unset a
  82 typeset -n a=b
  83 declare a=foo
  84 typeset -p a b
  85
  86 unset n v
  87 unset -n n v
  88
  89 v=(0 1)
  90 typeset -n n=v
  91 unset n[0]
  92 typeset -p n v
  93
  94 unset -n n
  95
  96 v=(0 1)
  97 typeset -n n=v
  98 unset -n n
  99 typeset -p n v
 100
 101 v=(0 1)
 102 declare -n n=v[1]
 103 unset n
 104 declare -p n v