tests/nameref15.sub

   1 #   This program is free software: you can redistribute it and/or modify
   2 #   it under the terms of the GNU General Public License as published by
   3 #   the Free Software Foundation, either version 3 of the License, or
   4 #   (at your option) any later version.
   5 #
   6 #   This program is distributed in the hope that it will be useful,
   7 #   but WITHOUT ANY WARRANTY; without even the implied warranty of
   8 #   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   9 #   GNU General Public License for more details.
  10 #
  11 #   You should have received a copy of the GNU General Public License
  12 #   along with this program.  If not, see <http://www.gnu.org/licenses/>.
  13 #
  14 f() { local -n a=$1; a=X; }
  15
  16 a=(0); f 'a[0]'
  17 while [[ -v a ]]; do declare -p a; unset a; done
  18
  19 a=(0); f 'a'
  20 while [[ -v a ]]; do declare -p a; unset a; done
  21
  22 b=(0); f 'b[0]'
  23 while [[ -v a ]]; do typeset -p a; unset a; done
  24 typeset -p b
  25
  26 b=(0); f 'a[0]'
  27 while [[ -v a ]]; do typeset -p a; unset a; done
  28 typeset -p b
  29
  30 add_X_echo()
  31 {
  32         typeset -n ref=$1
  33         ref+=X
  34         echo inside $ref
  35 }
  36
  37 ref=
  38 add_X_echo ref
  39 echo outside "$ref"
  40 unset ref
  41
  42 # same test, but assigning nameref variable circular reference directly
  43 xxx_func()
  44 {
  45         typeset -n xxx=xxx
  46         xxx=foo
  47         declare -p xxx
  48         echo $FUNCNAME: inside: xxx = $xxx
  49 }
  50
  51 xxx=7
  52 echo before: $xxx
  53 xxx_func
  54 echo after: $xxx
  55
  56 unset xxx
  57 unset -f xxx_func
  58
  59 typeset -n ref=ref
  60
  61 typeset -n ref=re ref+=f
  62 typeset -p ref
  63 ref=4
  64 typeset -p ref re
  65
  66 export ref
  67 printenv ref
  68 printenv re
  69
  70 unset ref ; unset -n ref
  71 unset foo; unset -n foo
  72
  73 typeset -n foo=var[@]
  74 typeset -p foo
  75 typeset -n ref=var ref+=[@]
  76 typeset -p ref
  77
  78 ref=42
  79
  80 typeset -n bar
  81 bar=var[@]
  82 typeset -p bar
  83 bar=7
  84
  85 unset a b
  86 unset -n a b
  87
  88 typeset -n a=b b
  89 b=a[1]
  90 typeset -p a b
  91 a=foo
  92 typeset -p a b
  93
  94 unset a
  95 typeset -n a=b
  96 declare a=foo
  97 typeset -p a b
  98
  99 unset n v
 100 unset -n n v
 101
 102 v=(0 1)
 103 typeset -n n=v
 104 unset n[0]
 105 typeset -p n v
 106
 107 unset -n n
 108
 109 v=(0 1)
 110 typeset -n n=v
 111 unset -n n
 112 typeset -p n v
 113
 114 v=(0 1)
 115 declare -n n=v[1]
 116 unset n
 117 declare -p n v
 118
 119 declare -n xref
 120 declare -a xref[1]=one
 121 declare -p xref
 122
 123 unset xref
 124 declare -n xref
 125 xref=array
 126 declare -a xref[1]=one
 127 declare -p xref