mirror of
https://github.com/rust-lang/rust-clippy
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26 lines
1.2 KiB
Rust
26 lines
1.2 KiB
Rust
#![warn(clippy::unnecessary_get_then_check)]
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use std::collections::{BTreeMap, BTreeSet, HashMap, HashSet};
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fn main() {
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let s: HashSet<String> = HashSet::new();
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let _ = s.contains("a"); //~ ERROR: unnecessary use of `get("a").is_some()`
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let _ = !s.contains("a"); //~ ERROR: unnecessary use of `get("a").is_none()`
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let s: HashMap<String, ()> = HashMap::new();
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let _ = s.contains_key("a"); //~ ERROR: unnecessary use of `get("a").is_some()`
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let _ = !s.contains_key("a"); //~ ERROR: unnecessary use of `get("a").is_none()`
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let s: BTreeSet<String> = BTreeSet::new();
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let _ = s.contains("a"); //~ ERROR: unnecessary use of `get("a").is_some()`
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let _ = !s.contains("a"); //~ ERROR: unnecessary use of `get("a").is_none()`
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let s: BTreeMap<String, ()> = BTreeMap::new();
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let _ = s.contains_key("a"); //~ ERROR: unnecessary use of `get("a").is_some()`
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let _ = !s.contains_key("a"); //~ ERROR: unnecessary use of `get("a").is_none()`
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// Import to check that the generic annotations are kept!
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let s: HashSet<String> = HashSet::new();
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let _ = s.contains::<str>("a"); //~ ERROR: unnecessary use of `get::<str>("a").is_some()`
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let _ = !s.contains::<str>("a"); //~ ERROR: unnecessary use of `get::<str>("a").is_none()`
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}
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