tests/array-at-star

   1 # test the expansion of ${array[@]} and ${array[*]}, both quoted and
   2 # unquoted.  the expansions should be exactly analogous to the
   3 # expansions of $@ and $* quoted and unquoted
   4 A=(a b)
   5
   6 recho "${A[*]}"
   7
   8 # If IFS is null, the parameters are joined without separators
   9 IFS=''
  10 recho "${A[*]}"
  11
  12 # If IFS is unset, the parameters are separated by spaces
  13 unset IFS
  14 recho "${A[*]}"
  15
  16 recho "${A[@]}"
  17 recho ${A[@]}
  18
  19 IFS='/'
  20 A=(bob 'tom dick harry' joe)
  21 set ${A[*]}
  22 recho $#
  23 recho $1
  24 recho $2
  25 recho $3
  26
  27 A=(bob 'tom dick harry' joe)
  28 set ${A[*]}
  29 recho $#
  30 recho $1
  31 recho $2
  32 recho $3
  33
  34 A=(bob 'tom dick harry' joe)
  35 set ${A[@]}
  36 recho $#
  37 recho $1
  38 recho $2
  39 recho $3
  40
  41 A=(bob 'tom dick harry' joe)
  42 set ${A[@]}
  43 recho $#
  44 recho $1
  45 recho $2
  46 recho $3
  47
  48 # according to POSIX.2, unquoted $* should expand to multiple words if
  49 # $IFS is null, just like unquoted $@
  50 IFS=''
  51 A=(bob 'tom dick harry' joe)
  52 set "${A[*]}"
  53 recho $#
  54 recho $1
  55 recho $2
  56 recho $3
  57
  58 A=(bob 'tom dick harry' joe)
  59 set ${A[*]}
  60 recho $#
  61 recho $1
  62 recho $2
  63 recho $3
  64
  65 A=(bob 'tom dick harry' joe)
  66 set ${A[@]}
  67 recho $#
  68 recho $1
  69 recho $2
  70 recho $3
  71
  72 # if IFS is unset, the individual positional parameters are split on
  73 # " \t\n" if $* or $@ are unquoted
  74 unset IFS
  75 A=(bob 'tom dick harry' joe)
  76 set ${A[*]}
  77 recho $#
  78 recho $1
  79 recho $2
  80 recho $3
  81
  82 A=(bob 'tom dick harry' joe)
  83 set ${A[@]}
  84 recho $#
  85 recho $1
  86 recho $2
  87 recho $3
  88
  89 # but not for "$@" or "$*"
  90 A=(bob 'tom dick harry' joe)
  91 set "${A[*]}"
  92 recho $#
  93 recho $1
  94 recho $2
  95 recho $3
  96
  97 A=(bob 'tom dick harry' joe)
  98 set "${A[@]}"
  99 recho $#
 100 recho $1
 101 recho $2
 102 recho $3
 103
 104 # these should both expand the value of A to multiple words
 105 A=(a b c d e)
 106 IFS=""
 107 recho ${A[@]}
 108 recho "${A[@]}"
 109
 110 # this example is straight from the POSIX.2 rationale and adapted to arrays
 111 A=(foo bar bam)
 112
 113 recho "${A[@]}"
 114 recho "${A[*]}"
 115
 116 unset IFS
 117
 118 recho "${A[@]}"
 119 recho ${A[@]}
 120 recho "${A[*]}"