diff options
Diffstat (limited to '')
-rw-r--r-- | src/tools/clippy/tests/ui/iter_kv_map.rs | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/src/tools/clippy/tests/ui/iter_kv_map.rs b/src/tools/clippy/tests/ui/iter_kv_map.rs new file mode 100644 index 000000000..7a1f1fb01 --- /dev/null +++ b/src/tools/clippy/tests/ui/iter_kv_map.rs @@ -0,0 +1,64 @@ +// run-rustfix + +#![warn(clippy::iter_kv_map)] +#![allow(clippy::redundant_clone)] +#![allow(clippy::suspicious_map)] +#![allow(clippy::map_identity)] + +use std::collections::{BTreeMap, HashMap}; + +fn main() { + let get_key = |(key, _val)| key; + + let map: HashMap<u32, u32> = HashMap::new(); + + let _ = map.iter().map(|(key, _)| key).collect::<Vec<_>>(); + let _ = map.iter().map(|(_, value)| value).collect::<Vec<_>>(); + let _ = map.iter().map(|(_, v)| v + 2).collect::<Vec<_>>(); + + let _ = map.clone().into_iter().map(|(key, _)| key).collect::<Vec<_>>(); + let _ = map.clone().into_iter().map(|(key, _)| key + 2).collect::<Vec<_>>(); + + let _ = map.clone().into_iter().map(|(_, val)| val).collect::<Vec<_>>(); + let _ = map.clone().into_iter().map(|(_, val)| val + 2).collect::<Vec<_>>(); + + let _ = map.clone().iter().map(|(_, val)| val).collect::<Vec<_>>(); + let _ = map.iter().map(|(key, _)| key).filter(|x| *x % 2 == 0).count(); + + // Don't lint + let _ = map.iter().filter(|(_, val)| *val % 2 == 0).map(|(key, _)| key).count(); + let _ = map.iter().map(get_key).collect::<Vec<_>>(); + + // Linting the following could be an improvement to the lint + // map.iter().filter_map(|(_, val)| (val % 2 == 0).then(val * 17)).count(); + + // Lint + let _ = map.iter().map(|(key, _value)| key * 9).count(); + let _ = map.iter().map(|(_key, value)| value * 17).count(); + + let map: BTreeMap<u32, u32> = BTreeMap::new(); + + let _ = map.iter().map(|(key, _)| key).collect::<Vec<_>>(); + let _ = map.iter().map(|(_, value)| value).collect::<Vec<_>>(); + let _ = map.iter().map(|(_, v)| v + 2).collect::<Vec<_>>(); + + let _ = map.clone().into_iter().map(|(key, _)| key).collect::<Vec<_>>(); + let _ = map.clone().into_iter().map(|(key, _)| key + 2).collect::<Vec<_>>(); + + let _ = map.clone().into_iter().map(|(_, val)| val).collect::<Vec<_>>(); + let _ = map.clone().into_iter().map(|(_, val)| val + 2).collect::<Vec<_>>(); + + let _ = map.clone().iter().map(|(_, val)| val).collect::<Vec<_>>(); + let _ = map.iter().map(|(key, _)| key).filter(|x| *x % 2 == 0).count(); + + // Don't lint + let _ = map.iter().filter(|(_, val)| *val % 2 == 0).map(|(key, _)| key).count(); + let _ = map.iter().map(get_key).collect::<Vec<_>>(); + + // Linting the following could be an improvement to the lint + // map.iter().filter_map(|(_, val)| (val % 2 == 0).then(val * 17)).count(); + + // Lint + let _ = map.iter().map(|(key, _value)| key * 9).count(); + let _ = map.iter().map(|(_key, value)| value * 17).count(); +} |