//@compile-flags: -Zdeduplicate-diagnostics=yes #![warn(clippy::no_effect_replace)] fn main() { let _ = "12345".replace('1', "1"); //~^ ERROR: replacing text with itself //~| NOTE: `-D clippy::no-effect-replace` implied by `-D warnings` let _ = "12345".replace("12", "12"); //~^ ERROR: replacing text with itself let _ = String::new().replace("12", "12"); //~^ ERROR: replacing text with itself let _ = "12345".replacen('1', "1", 1); //~^ ERROR: replacing text with itself let _ = "12345".replacen("12", "12", 1); //~^ ERROR: replacing text with itself let _ = String::new().replacen("12", "12", 1); //~^ ERROR: replacing text with itself let _ = "12345".replace("12", "22"); let _ = "12345".replacen("12", "22", 1); let mut x = X::default(); let _ = "hello".replace(&x.f(), &x.f()); //~^ ERROR: replacing text with itself let _ = "hello".replace(&x.f(), &x.ff()); let _ = "hello".replace(&y(), &y()); //~^ ERROR: replacing text with itself let _ = "hello".replace(&y(), &z()); let _ = Replaceme.replace("a", "a"); } #[derive(Default)] struct X {} impl X { fn f(&mut self) -> String { "he".to_string() } fn ff(&mut self) -> String { "hh".to_string() } } fn y() -> String { "he".to_string() } fn z() -> String { "hh".to_string() } struct Replaceme; impl Replaceme { pub fn replace(&mut self, a: &str, b: &str) -> Self { Self } }