(define-skeleton my-func-skeleton "func skeleton"
  ""
  (if (looking-back "n")
      '((setq str (skeleton-read "Function name: "))
        "// " str " ." n
        "func " str "(" @ ") {" n
        _ @ n
        -1 "}")
     '("func () {" n
       _ n
       -1 "}")))