# Pastebin m6F0VBsR
$ ./perl6 -e '
proto MAIN(:$*v, |)   {*}
multi MAIN($a)        {say $*v, $a}
multi MAIN($a, $b)    {say $*v, $a, $b}
multi MAIN($a, :$*v!) {say $*v, $a}
' -v=42 test
42test