1	#!/bin/bash
2	#
3	# Snippets from http://landley.net/notes.html
4	#
5	# Usage:
6	# test/toysh.sh
7
8	#### @Q
9	# http://landley.net/notes.html#24-06-2020
10
11	# Fix these
12	case $SH in (dash|mksh|zsh) exit ;; esac
13
14	xx() { echo "${*@Q}";}; xx a b c d
15	xx() { echo "${@@Q}";}; xx a b c d
16	## STDOUT:
17	'a' 'b' 'c' 'd'
18	'a' 'b' 'c' 'd'
19	## END
20	## OK osh STDOUT:
21	a b c d
22	a b c d
23	## END
24	## N-I dash/mksh/zsh stdout-json: ""
25
26	#### extglob 1 - OSH only supports extglob for fnmatch()?
27	rm * # setup
28	# http://landley.net/notes.html#12-06-2020
29	shopt -s extglob
30
31	touch abc\)d
32	echo ab+(c?d)
33
34	IFS=c ABC="c?d"
35	echo ab+($ABC)
36
37	ABC='*'
38	echo $ABC
39
40	## STDOUT:
41	abc)d
42	ab+( ?d)
43	abc)d _tmp
44	## END
45	## OK mksh STDOUT:
46	abc)d
47	ab+( ?d)
48	_tmp abc)d
49	## END
50
51	#### extglob 2
52	# http://landley.net/notes.html#17-05-2020
53
54	shopt -s extglob # required for bash, not osh
55	IFS=x; ABC=cxd; for i in +($ABC); do echo =$i=; done
56
57	## STDOUT:
58	=+(c=
59	=d)=
60	## END
61
62	#### char class / extglob
63	# http://landley.net/notes.html#14-05-2020
64	shopt -s extglob
65
66	rm *
67
68	touch l; echo [hello"]"
69
70	touch b
71	echo [$(echo abc)]
72
73	touch +
74	echo [+()]
75	echo [+(])
76	## STDOUT:
77	[hello]
78	b
79	+
80	[+(])
81	## END
82	## BUG mksh STDOUT:
83	[hello]
84	b
85	[+()]
86	[+(])
87	## END
88
89	#### patsub of $* - http://landley.net/notes.html#23-04-2020
90	chicken() { echo ${*/b c/ghi}; }; chicken a b c d
91	## STDOUT:
92	a b c d
93	## END
94	## BUG mksh stdout-json: ""
95	## BUG mksh status: 1
96
97
98	#### Brace Expansion (known difference)
99	# http://landley.net/notes.html#04-01-2020
100
101	HOME=/home/foo
102
103	echo {~,~root}/pwd
104	echo \{~,~root}/pwd
105	echo ""{~,~root}/pwd
106
107	## STDOUT:
108	~/pwd ~root/pwd
109	{~,~root}/pwd
110	~/pwd ~root/pwd
111	## END
112	## OK bash STDOUT:
113	/home/foo/pwd /root/pwd
114	{~,~root}/pwd
115	~/pwd ~root/pwd
116	## END
117
118	#### {abc}<<< - http://landley.net/notes-2019.html#09-12-2019
119	{ echo; } {abc}<<< walrus
120	cat <&$abc
121	## STDOUT:
122
123	walrus
124	## END
125	## N-I mksh stdout-json: ""
126	## N-I mksh status: 1
127
128	#### slice of @ and @ - http://landley.net/notes.html#23-04-2020
129	IFS=x; X=x; eval abc=a${X}b
130
131	chicken() { for i in "${@:3:5}"; do echo =$i=; done; } ; chicken ab cd ef gh ij kl mn op qr
132
133	chicken() { for i in "${*:3:5}"; do echo =$i=; done; } ; chicken ab cd ef gh ij kl mn op qr
134
135	## STDOUT:
136	=ef=
137	=gh=
138	=ij=
139	=kl=
140	=mn=
141	=ef gh ij kl mn=
142	## END
143	## N-I mksh stdout-json: ""
144	## N-I mksh status: 1
145