rust-clippy/tests/ui/toplevel_ref_arg.rs

#![warn(clippy)]
#![allow(unused)]

fn the_answer(ref mut x: u8) {
  *x = 42;
}

fn main() {
  let mut x = 0;
  the_answer(x);
  // Closures should not warn
  let y = |ref x| { println!("{:?}", x) };
  y(1u8);

  let ref x = 1;

  let ref y: (&_, u8) = (&1, 2);

  let ref z = 1 + 2;

  let ref mut z = 1 + 2;

  let (ref x, _) = (1,2); // okay, not top level
  println!("The answer is {}.", x);
}