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