#![warn(clippy::for_kv_map)] #![allow(clippy::used_underscore_binding)] use std::collections::*; use std::rc::Rc; fn main() { let m: HashMap<u64, u64> = HashMap::new(); for (_, v) in &m { let _v = v; } let m: Rc<HashMap<u64, u64>> = Rc::new(HashMap::new()); for (_, v) in &*m { let _v = v; // Here the `*` is not actually necessary, but the test tests that we don't // suggest // `in *m.values()` as we used to } let mut m: HashMap<u64, u64> = HashMap::new(); for (_, v) in &mut m { let _v = v; } let m: &mut HashMap<u64, u64> = &mut HashMap::new(); for (_, v) in &mut *m { let _v = v; } let m: HashMap<u64, u64> = HashMap::new(); let rm = &m; for (k, _value) in rm { let _k = k; } // The following should not produce warnings. let m: HashMap<u64, u64> = HashMap::new(); // No error, _value is actually used for (k, _value) in &m { let _ = _value; let _k = k; } let m: HashMap<u64, String> = Default::default(); for (_, v) in m { let _v = v; } }