mirror of
https://github.com/rust-lang/rust-clippy
synced 2024-12-05 02:50:32 +00:00
56 lines
1.5 KiB
Rust
56 lines
1.5 KiB
Rust
// aux-build:option_helpers.rs
|
|
|
|
#![warn(clippy::iter_nth)]
|
|
|
|
#[macro_use]
|
|
extern crate option_helpers;
|
|
|
|
use option_helpers::IteratorFalsePositives;
|
|
use std::collections::VecDeque;
|
|
|
|
/// Struct to generate false positives for things with `.iter()`.
|
|
#[derive(Copy, Clone)]
|
|
struct HasIter;
|
|
|
|
impl HasIter {
|
|
fn iter(self) -> IteratorFalsePositives {
|
|
IteratorFalsePositives { foo: 0 }
|
|
}
|
|
|
|
fn iter_mut(self) -> IteratorFalsePositives {
|
|
IteratorFalsePositives { foo: 0 }
|
|
}
|
|
}
|
|
|
|
/// Checks implementation of `ITER_NTH` lint.
|
|
fn iter_nth() {
|
|
let mut some_vec = vec![0, 1, 2, 3];
|
|
let mut boxed_slice: Box<[u8]> = Box::new([0, 1, 2, 3]);
|
|
let mut some_vec_deque: VecDeque<_> = some_vec.iter().cloned().collect();
|
|
|
|
{
|
|
// Make sure we lint `.iter()` for relevant types.
|
|
let bad_vec = some_vec.iter().nth(3);
|
|
let bad_slice = &some_vec[..].iter().nth(3);
|
|
let bad_boxed_slice = boxed_slice.iter().nth(3);
|
|
let bad_vec_deque = some_vec_deque.iter().nth(3);
|
|
}
|
|
|
|
{
|
|
// Make sure we lint `.iter_mut()` for relevant types.
|
|
let bad_vec = some_vec.iter_mut().nth(3);
|
|
}
|
|
{
|
|
let bad_slice = &some_vec[..].iter_mut().nth(3);
|
|
}
|
|
{
|
|
let bad_vec_deque = some_vec_deque.iter_mut().nth(3);
|
|
}
|
|
|
|
// Make sure we don't lint for non-relevant types.
|
|
let false_positive = HasIter;
|
|
let ok = false_positive.iter().nth(3);
|
|
let ok_mut = false_positive.iter_mut().nth(3);
|
|
}
|
|
|
|
fn main() {}
|