tests/ui/filter_next.fixed

//@aux-build:option_helpers.rs
#![warn(clippy::filter_next)]
#![expect(clippy::disallowed_names)]
#![allow(clippy::useless_vec)]

extern crate option_helpers;

use option_helpers::{IteratorFalsePositives, IteratorMethodFalsePositives};

fn main() {}

fn filter_next() {
    let v = [3, 2, 1, 0, -1, -2, -3];

    // Single-line case.
    let _ = v.iter().find(|&x| *x < 0);
    //~^ filter_next

    let _ = v.iter().rfind(|&x| *x < 0);
    //~^ filter_next

    // Multi-line case.
    #[rustfmt::skip]
    let _ = v.iter().find(|&x| {
    //~^ filter_next
                                *x < 0
                            });

    #[rustfmt::skip]
    let _ = v.iter().rfind(|&x| {
    //~^ filter_next
                                *x < 0
                            });

    // Check that we don't lint if the caller is not an `Iterator`.
    let foo = IteratorFalsePositives { foo: 0 };
    let _ = foo.filter().next();

    let foo = IteratorMethodFalsePositives {};
    let _ = foo.filter(42).next();
}

fn filter_next_back() {
    let v = [3, 2, 1, 0, -1, -2, -3];

    // Check that we don't lint if the caller is not an `Iterator`.
    let foo = IteratorFalsePositives { foo: 0 };
    let _ = foo.filter().next_back();

    let foo = IteratorMethodFalsePositives {};
    let _ = foo.filter(42).next_back();
}

#[clippy::msrv = "1.27"]
fn msrv_1_27() {
    let _ = vec![1].into_iter().rfind(|&x| x < 0);
    //~^ filter_next
}

#[clippy::msrv = "1.26"]
fn msrv_1_26() {
    let _ = vec![1].into_iter().filter(|&x| x < 0).next_back();
}