# do all of these in subshells since it's supposed to error out

# first try some invalid patterns
hush -c 'echo ${?}'
hush -c 'echo ${:?}'

# then some funky ones
hush -c 'echo ${#?}'
hush -c 'echo ${#:?}'

# now some valid ones
hush -c 'set --; echo _$1'
hush -c 'set --; echo _${1?}'
hush -c 'set --; echo _${1:?}'
hush -c 'set --; echo _${1?word}'
hush -c 'set --; echo _${1:?word}'

hush -c 'set -- aaaa; echo _$1'
hush -c 'set -- aaaa; echo _${1?}'
hush -c 'set -- aaaa; echo _${1:?}'
hush -c 'set -- aaaa; echo _${1?word}'
hush -c 'set -- aaaa; echo _${1:?word}'

hush -c 'unset f; echo _$f'
hush -c 'unset f; echo _${f?}'
hush -c 'unset f; echo _${f:?}'
hush -c 'unset f; echo _${f?word}'
hush -c 'unset f; echo _${f:?word}'

hush -c 'f=; echo _$f'
hush -c 'f=; echo _${f?}'
hush -c 'f=; echo _${f:?}'
hush -c 'f=; echo _${f?word}'
hush -c 'f=; echo _${f:?word}'

hush -c 'f=fff; echo _$f'
hush -c 'f=fff; echo _${f?}'
hush -c 'f=fff; echo _${f:?}'
hush -c 'f=fff; echo _${f?word}'
hush -c 'f=fff; echo _${f:?word}'