p6-timtowtdi

       &join($s, @a)                # sub call
        join($s, @a)                # sub call
        join $s, @a                 # sub call
   &::("join")($s, @a)              # sub call (lookup by name)
@a ==> &join($s)                    # pipe to sub call
@a ==>  join($s)                    # pipe to sub call
@a ==>  join $s                     # pipe to sub call
       &join($s) <== @a             # pipe to sub call
        join($s) <== @a             # pipe to sub call
        join $s  <== @a             # pipe to sub call
    $s.&join(@a)                    # sub as method call
    $s.&join: @a                    # sub as method call
$s.&::("join")(@a)                  # sub as method call (lookup by name)
$s.&::("join"): @a                  # sub as method call (lookup by name)
     @a.join($s)                    # method call
     @a.join: $s                    # method call
    @a."join"($s)                   # method call (lookup by name)
        join @a: $s                 # method call (indirect)
        join(@a: $s)                # method call (indirect)