1#compdef members
2
3_arguments \
4  '(-a --all)'{-a,--all}'[show all group members on one line]' \
5  '(-p --primary)'{-p,--primary}'[show only primary group members]' \
6  '(-s --secondary)'{-s,--secondary}'[show only secondary group members]' \
7  '(-t --two-lines)'{-t,--two-lines}'[show only primary/secondary across two lines]' \
8  '(-h --help)'{-h,--help}'[show help]' \
9  ':group:_groups'
10