1 #!/usr/bin/env bash
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
12 declare s
13 s='1 '
14 s+=' 2 ' # string append
15 declare -i i
16 i='1 '
17 i+=' 2 ' # arith add
18 declare -i j
19 j=x # treated like zero
20 j+=' 2 ' # arith add
21 echo "$s|$i|$j"
22 # stdout: 1 2 |3|2
23
24 ### append in arith context
25 declare s
26 (( s='1 '))
27 (( s+=' 2 ')) # arith add
28 declare -i i
29 (( i='1 ' ))
30 (( i+=' 2 ' ))
31 declare -i j
32 (( j='x ' )) # treated like zero
33 (( j+=' 2 ' ))
34 echo "$s|$i|$j"
35 # stdout: 3|3|2
36
37 ### declare array vs. string: mixing -a +a and () ''
38 # dynamic parsing of first argument.
39 declare +a 'xyz1=1'
40 declare +a 'xyz2=(2 3)'
41 declare -a 'xyz3=4'
42 declare -a 'xyz4=(5 6)'
43 argv.py "${xyz1}" "${xyz2}" "${xyz3[@]}" "${xyz4[@]}"
44 # stdout: ['1', '(2 3)', '4', '5', '6']
45
46 ### declare array vs. associative array
47 # Hm I don't understand why the array only has one element. I guess because
48 # index 0 is used twice?
49 declare -a 'array=([a]=b [c]=d)'
50 declare -A 'assoc=([a]=b [c]=d)'
51 argv.py "${#array[@]}" "${!array[@]}" "${array[@]}"
52 argv.py "${#assoc[@]}" "${!assoc[@]}" "${assoc[@]}"
53 # stdout-json: "['1', '0', 'd']\n['2', 'a', 'c', 'b', 'd']\n"