t / t4018 / rust-traiton commit userdiff: add built-in pattern for rust (d74e786)
   1unsafe trait RIGHT<T> {
   2    fn len(&self) -> u32;
   3    fn ChangeMe(&self, n: u32) -> T;
   4    fn iter<F>(&self, f: F) where F: Fn(T);
   5}