#![deny(dead_code)] fn unused() { //~ error: function `unused` is never used println!("blah"); } fn unused2(var: i32) { //~ error: function `unused2` is never used println!("foo {}", var); } fn unused3( //~ error: function `unused3` is never used var: i32, ) { println!("bar {}", var); } fn main() { println!("Hello world!"); }