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"