fn mkEx(s) :=
  '/^' + s + '$/;';

{. TODO: insert \zs at precise identifier! https://stackoverflow.com/a/31089753/11296354

fn processStr(s) :=
  let
    val line := split s /[ \(:]+/
    val outLine := sprintf '%s\t%s\t%s' (line.3 . fp . mkEx s)
  in outLine end;

processStr¨{%/fn +[[:lower:]][[:latin:]]*.*:=/}{`0}