1	#!/usr/bin/env bash
2	#
3	# Corner cases in var sub. Maybe rename this file.
4
5	#### Bad var sub
6	echo ${a|}
7	## stdout-json: ""
8	## status: 2
9	## OK bash/mksh status: 1
10
11	#### Braced block inside ${}
12	# NOTE: This bug was in bash 4.3 but fixed in bash 4.4.
13	echo ${foo:-$({ which ls; })}
14	## stdout: /bin/ls
15
16	#### Nested ${}
17	bar=ZZ
18	echo ${foo:-${bar}}
19	## stdout: ZZ
20
21	#### Filename redirect with "$@"
22	# bash - ambiguous redirect -- yeah I want this error
23	# - But I want it at PARSE time? So is there a special DollarAtPart?
24	# MultipleArgsPart?
25	# mksh - tries to create '_tmp/var-sub1 _tmp/var-sub2'
26	# dash - tries to create '_tmp/var-sub1 _tmp/var-sub2'
27	func() {
28	echo hi > "$@"
29	}
30	func _tmp/var-sub1 _tmp/var-sub2
31	## status: 1
32	## OK dash status: 2
33
34	#### Filename redirect with split word
35	# bash - runtime error, ambiguous redirect
36	# mksh and dash - they will NOT apply word splitting after redirect, and write
37	# to '_tmp/1 2'
38	# Stricter behavior seems fine.
39	foo='_tmp/1 2'
40	rm '_tmp/1 2'
41	echo hi > $foo
42	test -f '_tmp/1 2' && cat '_tmp/1 2'
43	## status: 0
44	## stdout: hi
45	## OK bash status: 1
46	## OK bash stdout-json: ""
47
48	#### Descriptor redirect to bad "$@"
49	# All of them give errors:
50	# dash - bad fd number, parse error?
51	# bash - ambiguous redirect
52	# mksh - illegal file descriptor name
53	set -- '2 3' 'c d'
54	echo hi 1>& "$@"
55	## status: 1
56	## OK dash status: 2
57
58	#### Here doc with bad "$@" delimiter
59	# bash - syntax error
60	# dash - syntax error: end of file unexpected
61	# mksh - runtime error: here document unclosed
62	#
63	# What I want is syntax error: bad delimiter!
64	#
65	# This means that "$@" should be part of the parse tree then? Anything that
66	# involves more than one token.
67	func() {
68	cat << "$@"
69	hi
70	1 2
71	}
72	func 1 2
73	## status: 2
74	## stdout-json: ""
75	## OK mksh status: 1