1	#!/usr/bin/env bash
2
3	#### implicit for loop
4	# This is like "for i in $@".
5	func() {
6	for i; do
7	echo $i
8	done
9	}
10	func 1 2 3
11	## stdout-json: "1\n2\n3\n"
12
13	#### empty for loop (has "in")
14	set -- 1 2 3
15	for i in ; do
16	echo $i
17	done
18	## stdout-json: ""
19
20	#### for loop with invalid identifier
21	# should be compile time error, but runtime error is OK too
22	for - in a b c; do
23	echo hi
24	done
25	## stdout-json: ""
26	## status: 2
27	## OK bash/mksh status: 1
28	## BUG zsh stdout: hi
29	## BUG zsh status: 1
30
31	#### Tilde expansion within for loop
32	HOME=/home/bob
33	for name in ~/src ~/git; do
34	echo $name
35	done
36	## stdout-json: "/home/bob/src\n/home/bob/git\n"
37
38	#### Brace Expansion within Array
39	for i in -{a,b} {c,d}-; do
40	echo $i
41	done
42	## stdout-json: "-a\n-b\nc-\nd-\n"
43	## N-I dash stdout-json: "-{a,b}\n{c,d}-\n"
44
45	#### using loop var outside loop
46	func() {
47	for i in a b c; do
48	echo $i
49	done
50	echo $i
51	}
52	func
53	## status: 0
54	## stdout-json: "a\nb\nc\nc\n"
55
56	#### continue
57	for i in a b c; do
58	echo $i
59	if test $i = b; then
60	continue
61	fi
62	echo $i
63	done
64	## status: 0
65	## stdout-json: "a\na\nb\nc\nc\n"
66
67	#### break
68	for i in a b c; do
69	echo $i
70	if test $i = b; then
71	break
72	fi
73	done
74	## status: 0
75	## stdout-json: "a\nb\n"
76
77	#### dynamic control flow (KNOWN INCOMPATIBILITY)
78	# hm would it be saner to make FATAL builtins called break/continue/etc.?
79	# On the other hand, this spits out errors loudly.
80	b=break
81	for i in 1 2 3; do
82	echo $i
83	$b
84	done
85	## STDOUT:
86	1
87	## END
88	## OK osh STDOUT:
89	1
90	2
91	3
92	## END
93	## OK osh status: 127
94
95	#### while in while condition
96	# This is a consequence of the grammar
97	while while true; do echo cond; break; done
98	do
99	echo body
100	break
101	done
102	## stdout-json: "cond\nbody\n"
103
104	#### while in pipe
105	x=$(find spec/ | wc -l)
106	y=$(find spec/ | while read path; do
107	echo $path
108	done | wc -l
109	)
110	test $x -eq $y
111	echo status=$?
112	## stdout: status=0
113
114	#### while in pipe with subshell
115	i=0
116	find . -maxdepth 1 -name INSTALL.txt -o -name LICENSE.txt | ( while read path; do
117	i=$((i+1))
118	#echo $i
119	done
120	echo $i )
121	## stdout: 2
122
123	#### until loop
124	# This is just the opposite of while? while ! cond?
125	until false; do
126	echo hi
127	break
128	done
129	## stdout: hi
130
131	#### continue at top level
132	# zsh behaves with strict-control-flow!
133	if true; then
134	echo one
135	continue
136	echo two
137	fi
138	## status: 0
139	## STDOUT:
140	one
141	two
142	## END
143	## OK zsh status: 1
144	## OK zsh STDOUT:
145	one
146	## END
147
148	#### continue in subshell
149	for i in $(seq 3); do
150	echo "> $i"
151	( if true; then continue; fi; echo "Should not print" )
152	echo ". $i"
153	done
154	## STDOUT:
155	> 1
156	. 1
157	> 2
158	. 2
159	> 3
160	. 3
161	## END
162	## BUG mksh STDOUT:
163	> 1
164	Should not print
165	. 1
166	> 2
167	Should not print
168	. 2
169	> 3
170	Should not print
171	. 3
172	## END
173
174	#### bad arg to break
175	x=oops
176	while true; do
177	echo hi
178	break $x
179	sleep 0.1
180	done
181	## stdout: hi
182	## status: 1
183	## OK dash status: 2
184	## OK bash status: 128
185
186	#### too many args to continue
187	# OSH treats this as a parse error
188	for x in a b c; do
189	echo $x
190	# bash breaks rather than continue or fatal error!!!
191	continue 1 2 3
192	done
193	echo --
194	## stdout-json: ""
195	## status: 2
196	## BUG bash STDOUT:
197	a
198	--
199	## END
200	## OK bash status: 0
201	## BUG dash/mksh/zsh STDOUT:
202	a
203	b
204	c
205	--
206	## END
207	## BUG dash/mksh/zsh status: 0