rust/tests/ui/search_is_some_fixable_some.rs

// run-rustfix
#![allow(dead_code)]
#![warn(clippy::search_is_some)]

fn main() {
    let v = vec![3, 2, 1, 0, -1, -2, -3];
    let y = &&42;

    // Check `find().is_some()`, single-line case.
    let _ = v.iter().find(|&x| *x < 0).is_some();
    let _ = (0..1).find(|x| **y == *x).is_some(); // one dereference less
    let _ = (0..1).find(|x| *x == 0).is_some();
    let _ = v.iter().find(|x| **x == 0).is_some();
    let _ = (4..5).find(|x| *x == 1 || *x == 3 || *x == 5).is_some();
    let _ = (1..3).find(|x| [1, 2, 3].contains(x)).is_some();
    let _ = (1..3).find(|x| *x == 0 || [1, 2, 3].contains(x)).is_some();
    let _ = (1..3).find(|x| [1, 2, 3].contains(x) || *x == 0).is_some();
    let _ = (1..3)
        .find(|x| [1, 2, 3].contains(x) || *x == 0 || [4, 5, 6].contains(x) || *x == -1)
        .is_some();

    // Check `position().is_some()`, single-line case.
    let _ = v.iter().position(|&x| x < 0).is_some();

    // Check `rposition().is_some()`, single-line case.
    let _ = v.iter().rposition(|&x| x < 0).is_some();

    let s1 = String::from("hello world");
    let s2 = String::from("world");
    // caller of `find()` is a `&`static str`
    let _ = "hello world".find("world").is_some();
    let _ = "hello world".find(&s2).is_some();
    let _ = "hello world".find(&s2[2..]).is_some();
    // caller of `find()` is a `String`
    let _ = s1.find("world").is_some();
    let _ = s1.find(&s2).is_some();
    let _ = s1.find(&s2[2..]).is_some();
    // caller of `find()` is slice of `String`
    let _ = s1[2..].find("world").is_some();
    let _ = s1[2..].find(&s2).is_some();
    let _ = s1[2..].find(&s2[2..]).is_some();
}

#[allow(clippy::clone_on_copy, clippy::map_clone)]
mod issue7392 {
    struct Player {
        hand: Vec<usize>,
    }
    fn filter() {
        let p = Player {
            hand: vec![1, 2, 3, 4, 5],
        };
        let filter_hand = vec![5];
        let _ = p
            .hand
            .iter()
            .filter(|c| filter_hand.iter().find(|cc| c == cc).is_some())
            .map(|c| c.clone())
            .collect::<Vec<_>>();
    }

    struct PlayerTuple {
        hand: Vec<(usize, char)>,
    }
    fn filter_tuple() {
        let p = PlayerTuple {
            hand: vec![(1, 'a'), (2, 'b'), (3, 'c'), (4, 'd'), (5, 'e')],
        };
        let filter_hand = vec![5];
        let _ = p
            .hand
            .iter()
            .filter(|(c, _)| filter_hand.iter().find(|cc| c == *cc).is_some())
            .map(|c| c.clone())
            .collect::<Vec<_>>();
    }
}