1 // aux-build:option_helpers.rs
3 #![allow(clippy::unused_self)]
4 #![warn(clippy::iter_nth)]
7 extern crate option_helpers;
9 use option_helpers::IteratorFalsePositives;
10 use std::collections::VecDeque;
12 /// Struct to generate false positives for things with `.iter()`.
13 #[derive(Copy, Clone)]
17 fn iter(self) -> IteratorFalsePositives {
18 IteratorFalsePositives { foo: 0 }
21 fn iter_mut(self) -> IteratorFalsePositives {
22 IteratorFalsePositives { foo: 0 }
26 /// Checks implementation of `ITER_NTH` lint.
28 let mut some_vec = vec![0, 1, 2, 3];
29 let mut boxed_slice: Box<[u8]> = Box::new([0, 1, 2, 3]);
30 let mut some_vec_deque: VecDeque<_> = some_vec.iter().cloned().collect();
33 // Make sure we lint `.iter()` for relevant types.
34 let bad_vec = some_vec.iter().nth(3);
35 let bad_slice = &some_vec[..].iter().nth(3);
36 let bad_boxed_slice = boxed_slice.iter().nth(3);
37 let bad_vec_deque = some_vec_deque.iter().nth(3);
41 // Make sure we lint `.iter_mut()` for relevant types.
42 let bad_vec = some_vec.iter_mut().nth(3);
45 let bad_slice = &some_vec[..].iter_mut().nth(3);
48 let bad_vec_deque = some_vec_deque.iter_mut().nth(3);
51 // Make sure we don't lint for non-relevant types.
52 let false_positive = HasIter;
53 let ok = false_positive.iter().nth(3);
54 let ok_mut = false_positive.iter_mut().nth(3);