1	# spec/oil-for
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
16
17	var mydict = {name: 'bob', age: 40}
18	for key in (mydict) {
19	echo "key $key"
20	}
21
22
23	## STDOUT:
24	key name
25	key age
26	## END
27
28
29	#### For loop over expression: range (low priority)
30	var myrange = 0:3
31	for i in (myrange) {
32	echo "i $key"
33	}
34
35	## STDOUT:
36	i 0
37	i 1
38	i 2
39	## END
40
41	#### Shell for loop with index (equivalent of enumerate())
42	for i, item in a b c {
43	echo "$i $item"
44	}
45	## STDOUT:
46	0 a
47	1 b
48	2 c
49	## END
50
51	#### 3 indices with (mylist) is a runtime error
52	for i, item bad in (['foo', 'bar']) {
53	echo "$i $item $bad"
54	}
55	## status: 2
56
57	#### Shell for loop can't have 3 indices
58	for i, bad, bad in a b c {
59	echo $i $item
60	}
61	## status: 2
62
63	#### Any for loop can't have 4 indiecs
64	for a, b, c, d in (['foo']) {
65	echo $i $item
66	}
67	## status: 2
68
69	#### Expression for loop with index: list
70	for i, item in (['spam', 'eggs']) {
71	echo "$i $item"
72	}
73	## STDOUT:
74	0 spam
75	1 eggs
76	## END
77
78	#### Expression for loop with index: dict (TODO: define dict iter order)
79	for key, value in ({name: 'bob', age: 40}) {
80	echo "pair $key $value"
81	}
82	## STDOUT:
83	pair name bob
84	pair age 40
85	## END
86
87	#### dict: index key value loop (TODO: define dict iter order)
88	for i, key, value in ({name: 'bob', age: 40}) {
89	echo "entry $i $key $value"
90	}
91	## STDOUT:
92	entry 0 name bob
93	entry 1 age 40
94	## END
95
96
97	#### Equivalent of zip()
98
99	var array = %(d e f)
100
101	for i, item in a b c {
102	echo "$i $item $[array[i]]"
103	}
104
105	## STDOUT:
106	0 a d
107	1 b e
108	2 c f
109	## END
110
111	#### Iterate over shell data structures
112
113	# TODO: use new style
114
115	declare array=(one two three)
116	for item in (array) {
117	echo $item
118	}
119
120	echo ---
121
122	declare -A A=([k]=v [k2]=v2) # iterate over keys
123	for key in (A) {
124	echo $key
125	}
126	## STDOUT:
127	one
128	two
129	three
130	---
131	k
132	k2
133	## END
134
135
136
137	#### parse_bare_word eliminates confusion
138
139	shopt --unset parse_bare_word
140
141	for x in mylist { # THIS FAILS
142	echo "BAD $x"
143	}
144
145	## status: 2
146	## STDOUT:
147	## END
148
149
150	#### Object that's not iterable
151
152	echo hi
153	for x in (42) {
154	echo $x
155	}
156
157	## status: 3
158	## STDOUT:
159	hi
160	## END
161
162	#### Oil for with brace substitution and glob
163
164	touch {foo,bar}.py
165	for i, file in *.py {README,foo}.md {
166	echo "$i $file"
167	}
168	## STDOUT:
169	0 bar.py
170	1 foo.py
171	2 README.md
172	3 foo.md
173	## END