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