#![feature(plugin, collections)] #![plugin(clippy)] #[deny(cmp_owned)] fn main() { let x = "oh"; #[allow(str_to_string)] fn with_to_string(x : &str) { x != "foo".to_string(); //~ERROR this creates an owned instance } with_to_string(x); x != "foo".to_owned(); //~ERROR this creates an owned instance #[allow(deprecated)] // for from_str fn old_timey(x : &str) { x != String::from_str("foo"); //~ERROR this creates an owned instance } old_timey(x); x != String::from("foo"); //~ERROR this creates an owned instance }