メソッドの関数定義を展開して、近所のレシーバーを自動で入れる

funcm.yasnippet

# -*- mode: snippet -*-
# name: golang method receiver
# key: sf
# --
func (${1:`(save-excursion
    (let ((re "^func (\\([^\\)]*\\))"))
      (cond
       ((or 
         (re-search-backward re nil t)
         (re-search-forward  re nil t))
        (match-string 1))
       (t ""))))`}) ${2:name} (${3:args}) ${4:result-type} {
   $0
}