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# testing various combinations of quoted and unquoted expansions of $@, and
# whether they generate empty words after expansion
n() { echo "$#"; }
n "$@"
n ${foo-"$@"}
n "${foo-$@}"
n ""$@
n """$@"
n $(true)$@
n "$(true)$@"
n "$(true)$@"
n "$(true)""$@"
n $xxx$@
n "$xxx$@"
n $xxx"$@"
n "$xxx""$@"
recho $xxx"$@"
echo after 1
recho "$xxx$@"
echo after 2
recho ${foo:-$xxx"$@"}
echo after 3
# this is where these things start to differ
echo same as 1
recho "${foo:-$xxx"$@"}"
echo same as 2
recho "${foo:-$xxx$@}"
echo null fields
recho ""$@
recho """$@"
echo null fields in rhs
echo null string with unquoted '$@'
recho ${foo:-""$@}
echo null string with quoted '$@'
recho ${foo:-"""$@"}
echo assignment
recho "${foo=$@}"
echo variable
recho "$foo"
echo dollar-at
recho "${@}"
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