1	## our_shell: ysh
2
3	#### For loop over expression: List
4	var mylist = [1, 2, 3]
5	for item in (mylist) {
6	echo "item $item"
7	}
8
9	## STDOUT:
10	item 1
11	item 2
12	item 3
13	## END
14
15	#### For loop over expression: Dict, not BashAssoc
16
17	var mydict = {name: 'bob', age: 40}
18	for key in (mydict) {
19	echo "key $key"
20	}
21
22	declare -A A=([name]=bob)
23	for key in (A) {
24	echo "key $key"
25	}
26
27	## status: 3
28	## STDOUT:
29	key name
30	key age
31	## END
32
33
34	#### For loop over expression: range (low priority)
35	var myrange = 0:3
36	for i in (myrange) {
37	echo "i $key"
38	}
39
40	## STDOUT:
41	i 0
42	i 1
43	i 2
44	## END
45
46	#### Shell for loop with index (equivalent of enumerate())
47	for i, item in a b c {
48	echo "$i $item"
49	}
50	## STDOUT:
51	0 a
52	1 b
53	2 c
54	## END
55
56	#### 3 indices with (mylist) is a runtime error
57	for i, item bad in (['foo', 'bar']) {
58	echo "$i $item $bad"
59	}
60	## status: 2
61
62	#### Shell for loop can't have 3 indices
63	for i, bad, bad in a b c {
64	echo $i $item
65	}
66	## status: 2
67
68	#### Any for loop can't have 4 indiecs
69	for a, b, c, d in (['foo']) {
70	echo $i $item
71	}
72	## status: 2
73
74	#### Expression for loop with index: List
75	for i, item in (['spam', 'eggs']) {
76	echo "$i $item"
77	}
78	## STDOUT:
79	0 spam
80	1 eggs
81	## END
82
83	#### Expression for loop with index: Dict (TODO: define dict iter order)
84	for key, value in ({name: 'bob', age: 40}) {
85	echo "pair $key $value"
86	}
87	## STDOUT:
88	pair name bob
89	pair age 40
90	## END
91
92	#### Dict: index key value loop (TODO: define dict iter order)
93	for i, key, value in ({name: 'bob', age: 40}) {
94	echo "entry $i $key $value"
95	}
96	## STDOUT:
97	entry 0 name bob
98	entry 1 age 40
99	## END
100
101
102	#### Equivalent of zip()
103
104	var array = :| d e f |
105
106	for i, item in a b c {
107	echo "$i $item $[array[i]]"
108	}
109
110	## STDOUT:
111	0 a d
112	1 b e
113	2 c f
114	## END
115
116	#### parse_bare_word eliminates confusion
117
118	shopt --unset parse_bare_word
119
120	for x in mylist { # THIS FAILS
121	echo "BAD $x"
122	}
123
124	## status: 2
125	## STDOUT:
126	## END
127
128
129	#### Object that's not iterable
130
131	echo hi
132	for x in (42) {
133	echo $x
134	}
135
136	## status: 3
137	## STDOUT:
138	hi
139	## END
140
141	#### Oil for with brace substitution and glob
142
143	touch {foo,bar}.py
144	for i, file in *.py {README,foo}.md {
145	echo "$i $file"
146	}
147	## STDOUT:
148	0 bar.py
149	1 foo.py
150	2 README.md
151	3 foo.md
152	## END