| 1 | ## compare_shells: bash-4.4
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| 2 |
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| 3 | # Tests for bash's type flags on cells. Hopefully we don't have to implement
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| 4 | # this, but it's good to know the behavior.
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| 5 | #
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| 6 | # OSH follows a Python-ish model of types carried with values/objects, not
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| 7 | # locations.
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| 8 | #
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| 9 | # See https://github.com/oilshell/oil/issues/26
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| 10 |
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| 11 | #### declare -i with +=
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| 12 | declare s
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| 13 | s='1 '
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| 14 | s+=' 2 ' # string append
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| 15 |
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| 16 | declare -i i
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| 17 | i='1 '
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| 18 | i+=' 2 ' # arith add
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| 19 |
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| 20 | declare -i j
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| 21 | j=x # treated like zero
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| 22 | j+=' 2 ' # arith add
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| 23 |
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| 24 | echo "[$s]"
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| 25 | echo [$i]
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| 26 | echo [$j]
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| 27 | ## STDOUT:
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| 28 | [1 2 ]
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| 29 | [3]
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| 30 | [2]
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| 31 | ## END
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| 32 | ## N-I osh STDOUT:
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| 33 | [1 2 ]
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| 34 | [1 2 ]
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| 35 | [x 2 ]
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| 36 | ## END
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| 37 |
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| 38 | #### declare -i with arithmetic inside strings (Nix, issue 864)
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| 39 |
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| 40 | # example
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| 41 | # https://github.com/NixOS/nixpkgs/blob/master/pkgs/stdenv/generic/setup.sh#L379
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| 42 |
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| 43 | declare -i s
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| 44 | s='1 + 2'
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| 45 | echo s=$s
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| 46 |
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| 47 | declare -a array=(1 2 3)
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| 48 | declare -i item
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| 49 | item='array[1+1]'
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| 50 | echo item=$item
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| 51 |
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| 52 | ## STDOUT:
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| 53 | s=3
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| 54 | item=3
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| 55 | ## END
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| 56 | ## N-I osh STDOUT:
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| 57 | s=1 + 2
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| 58 | item=array[1+1]
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| 59 | ## END
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| 60 |
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| 61 | #### append in arith context
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| 62 | declare s
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| 63 | (( s='1 '))
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| 64 | (( s+=' 2 ')) # arith add
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| 65 | declare -i i
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| 66 | (( i='1 ' ))
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| 67 | (( i+=' 2 ' ))
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| 68 | declare -i j
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| 69 | (( j='x ' )) # treated like zero
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| 70 | (( j+=' 2 ' ))
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| 71 | echo "$s|$i|$j"
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| 72 | ## STDOUT:
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| 73 | 3|3|2
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| 74 | ## END
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| 75 |
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| 76 | #### declare array vs. string: mixing -a +a and () ''
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| 77 | # dynamic parsing of first argument.
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| 78 | declare +a 'xyz1=1'
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| 79 | declare +a 'xyz2=(2 3)'
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| 80 | declare -a 'xyz3=4'
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| 81 | declare -a 'xyz4=(5 6)'
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| 82 | argv.py "${xyz1}" "${xyz2}" "${xyz3[@]}" "${xyz4[@]}"
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| 83 | ## STDOUT:
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| 84 | ['1', '(2 3)', '4', '5', '6']
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| 85 | ## END
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| 86 | ## N-I osh STDOUT:
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| 87 | ['', '']
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| 88 | ## END
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| 89 |
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| 90 |
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| 91 | #### declare array vs. associative array
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| 92 | # Hm I don't understand why the array only has one element. I guess because
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| 93 | # index 0 is used twice?
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| 94 | declare -a 'array=([a]=b [c]=d)'
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| 95 | declare -A 'assoc=([a]=b [c]=d)'
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| 96 | argv.py "${#array[@]}" "${!array[@]}" "${array[@]}"
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| 97 | argv.py "${#assoc[@]}" "${!assoc[@]}" "${assoc[@]}"
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| 98 | ## STDOUT:
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| 99 | ['1', '0', 'd']
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| 100 | ['2', 'a', 'c', 'b', 'd']
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| 101 | ## END
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| 102 | ## N-I osh STDOUT:
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| 103 | ['0']
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| 104 | ['0']
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| 105 | ## END
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