hush_test/hush-vars/param_expand_alt.tests

# first try some invalid patterns (do in subshell due to parsing error)
"$THIS_SH" -c 'echo ${+}  ; echo moo'
"$THIS_SH" -c 'echo ${:+} ; echo moo'

# now some funky ones
echo _${#+} _${#:+}

# now some valid ones
set --
echo _$1 _${1+} _${1:+} _${1+word} _${1:+word}

set -- aaaa
echo _$1 _${1+} _${1:+} _${1+word} _${1:+word}

unset f
echo _$f _${f+} _${f:+} _${f+word} _${f:+word}

f=
echo _$f _${f+} _${f:+} _${f+word} _${f:+word}

f=fff
echo _$f _${f+} _${f:+} _${f+word} _${f:+word}
1	# first try some invalid patterns (do in subshell due to parsing error)
2	"$THIS_SH" -c 'echo ${+} ; echo moo'
3	"$THIS_SH" -c 'echo ${:+} ; echo moo'
4
5	# now some funky ones
6	echo _${#+} _${#:+}
7
8	# now some valid ones
9	set --
10	echo _$1 _${1+} _${1:+} _${1+word} _${1:+word}
11
12	set -- aaaa
13	echo _$1 _${1+} _${1:+} _${1+word} _${1:+word}
14
15	unset f
16	echo _$f _${f+} _${f:+} _${f+word} _${f:+word}
17
18	f=
19	echo _$f _${f+} _${f:+} _${f+word} _${f:+word}
20
21	f=fff
22	echo _$f _${f+} _${f:+} _${f+word} _${f:+word}