57 lines
1.5 KiB
Rust
57 lines
1.5 KiB
Rust
#![warn(clippy::for_kv_map)]
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#![allow(clippy::used_underscore_binding)]
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use std::collections::*;
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use std::rc::Rc;
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fn main() {
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let m: HashMap<u64, u64> = HashMap::new();
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for v in m.values() {
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//~^ ERROR: you seem to want to iterate on a map's values
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//~| NOTE: `-D clippy::for-kv-map` implied by `-D warnings`
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let _v = v;
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}
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let m: Rc<HashMap<u64, u64>> = Rc::new(HashMap::new());
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for v in (*m).values() {
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//~^ ERROR: you seem to want to iterate on a map's values
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let _v = v;
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// Here the `*` is not actually necessary, but the test tests that we don't
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// suggest
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// `in *m.values()` as we used to
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}
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let mut m: HashMap<u64, u64> = HashMap::new();
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for v in m.values_mut() {
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//~^ ERROR: you seem to want to iterate on a map's values
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let _v = v;
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}
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let m: &mut HashMap<u64, u64> = &mut HashMap::new();
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for v in (*m).values_mut() {
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//~^ ERROR: you seem to want to iterate on a map's values
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let _v = v;
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}
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let m: HashMap<u64, u64> = HashMap::new();
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let rm = &m;
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for k in rm.keys() {
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//~^ ERROR: you seem to want to iterate on a map's keys
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let _k = k;
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}
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// The following should not produce warnings.
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let m: HashMap<u64, u64> = HashMap::new();
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// No error, _value is actually used
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for (k, _value) in &m {
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let _ = _value;
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let _k = k;
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}
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let m: HashMap<u64, String> = Default::default();
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for (_, v) in m {
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let _v = v;
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}
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}
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