1	#### Lower Case with , and ,,
2	x='ABC DEF'
3	echo ${x,}
4	echo ${x,,}
5	echo empty=${empty,}
6	echo empty=${empty,,}
7	## STDOUT:
8	aBC DEF
9	abc def
10	empty=
11	empty=
12	## END
13
14	#### Upper Case with ^ and ^^
15	x='abc def'
16	echo ${x^}
17	echo ${x^^}
18	echo empty=${empty^}
19	echo empty=${empty^^}
20	## STDOUT:
21	Abc def
22	ABC DEF
23	empty=
24	empty=
25	## END
26
27	#### Lower Case with constant string (VERY WEIRD)
28	x='AAA ABC DEF'
29	echo ${x,A}
30	echo ${x,,A} # replaces every A only?
31	## STDOUT:
32	aAA ABC DEF
33	aaa aBC DEF
34	## END
35
36	#### Lower Case glob
37	x='ABC DEF'
38	echo ${x,[d-f]}
39	echo ${x,,[d-f]} # This seems buggy, it doesn't include F?
40	## STDOUT:
41	ABC DEF
42	ABC deF
43	## END
44
45	#### ${x@Q}
46	x="FOO'BAR spam\"eggs"
47	eval "new=${x@Q}"
48	test "$x" = "$new" && echo OK
49	## STDOUT:
50	OK
51	## END
52
53	#### ${!prefix@} ${!prefix*} yields sorted array of var names
54	ZOO=zoo
55	ZIP=zip
56	ZOOM='one two'
57	Z='three four'
58
59	z=lower
60
61	argv.py ${!Z*}
62	argv.py ${!Z@}
63	argv.py "${!Z*}"
64	argv.py "${!Z@}"
65	for i in 1 2; do argv.py ${!Z*} ; done
66	for i in 1 2; do argv.py ${!Z@} ; done
67	for i in 1 2; do argv.py "${!Z*}"; done
68	for i in 1 2; do argv.py "${!Z@}"; done
69	## STDOUT:
70	['Z', 'ZIP', 'ZOO', 'ZOOM']
71	['Z', 'ZIP', 'ZOO', 'ZOOM']
72	['Z ZIP ZOO ZOOM']
73	['Z', 'ZIP', 'ZOO', 'ZOOM']
74	['Z', 'ZIP', 'ZOO', 'ZOOM']
75	['Z', 'ZIP', 'ZOO', 'ZOOM']
76	['Z', 'ZIP', 'ZOO', 'ZOOM']
77	['Z', 'ZIP', 'ZOO', 'ZOOM']
78	['Z ZIP ZOO ZOOM']
79	['Z ZIP ZOO ZOOM']
80	['Z', 'ZIP', 'ZOO', 'ZOOM']
81	['Z', 'ZIP', 'ZOO', 'ZOOM']
82	## END
83
84	#### ${!prefix@} matches var name (regression)
85	hello1=1 hello2=2 hello3=3
86	echo ${!hello@}
87	hello=()
88	echo ${!hello@}
89	## STDOUT:
90	hello1 hello2 hello3
91	hello hello1 hello2 hello3
92	## END
93
94	#### ${var@a} for attributes
95	array=(one two)
96	echo ${array@a}
97	declare -r array=(one two)
98	echo ${array@a}
99	declare -rx PYTHONPATH=hi
100	echo ${PYTHONPATH@a}
101
102	# bash and osh differ here
103	#declare -rxn x=z
104	#echo ${x@a}
105	## STDOUT:
106	a
107	ar
108	rx
109	## END
110
111	#### ${var@a} error conditions
112	echo [${?@a}]
113	## STDOUT:
114	[]
115	## END