rust/tests/ui/iter_next_loop.rs

#![allow(dead_code, unused, for_loops_over_fallibles)]
#![warn(clippy::iter_next_loop)]

fn main() {
    let x = [1, 2, 3, 4];
    for _ in x.iter().next() {}
    //~^ iter_next_loop

    struct Unrelated(&'static [u8]);
    impl Unrelated {
        fn next(&self) -> std::slice::Iter<'_, u8> {
            self.0.iter()
        }
    }
    let u = Unrelated(&[0]);
    for _v in u.next() {} // no error
}

fn issue14630() {
    macro_rules! mac {
        (next $e:expr) => {
            $e.iter().next()
        };
    }

    for _ in dbg!([1, 2].iter()).next() {}
    //~^ iter_next_loop

    for _ in mac!(next [1, 2]) {}
}