mirror of
https://github.com/rust-lang/rust-clippy
synced 2024-11-27 23:20:39 +00:00
23 lines
685 B
Rust
23 lines
685 B
Rust
#![feature(plugin)]
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#![plugin(clippy)]
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#![allow(unused)]
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#![deny(hashmap_entry)]
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use std::collections::HashMap;
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use std::hash::Hash;
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fn insert_if_absent<K: Eq + Hash, V>(m: &mut HashMap<K, V>, k: K, v: V) {
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if !m.contains_key(&k) { m.insert(k, v); } //~ERROR: usage of `contains_key` followed by `insert` on `HashMap`
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}
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fn insert_if_absent2<K: Eq + Hash, V>(m: &mut HashMap<K, V>, k: K, v: V) {
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if !m.contains_key(&k) { m.insert(k, v) } else { None }; //~ERROR: usage of `contains_key` followed by `insert` on `HashMap`
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}
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fn insert_other_if_absent<K: Eq + Hash, V>(m: &mut HashMap<K, V>, k: K, o: K, v: V) {
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if !m.contains_key(&k) { m.insert(o, v); }
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}
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fn main() {
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}
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