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New lint:
unnecessary_map_or
(#11796)
Closes #10118 This lint checks `map_or` method calls to check if they can be consolidated down to something simpler and/or more readable. For example, the code ```rs let x = Some(5); x.map_or(false, |n| n == 5) ``` can be rewritten as ```rs let x = Some(5); x == Some(5) ``` In addition, when the closure is more complex, the code can be altered from, say, ```rs let x = Ok::<Vec<i32>, i32>(vec![5]); x.map_or(false, |n| n == [5]) ``` into ```rs let x = Ok::<Vec<i32>, i32>(vec![5]); x.is_some_and(|n| n == [5]) ``` This lint also considers cases where the `map_or` can be chained with other method calls, and accommodates accordingly by adding extra parentheses as needed to the suggestion. changelog: add new lint `unnecessary_map_or`
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