17 lines
310 B
Rust
17 lines
310 B
Rust
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#![warn(clippy::map_entry)]
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#![allow(dead_code)]
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use std::collections::BTreeMap;
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fn foo() {}
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fn btree_map<K: Eq + Ord + Copy, V: Copy>(m: &mut BTreeMap<K, V>, k: K, v: V) {
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// insert then do something, use if let
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if !m.contains_key(&k) {
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m.insert(k, v);
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foo();
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}
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}
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fn main() {}
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