37 lines
634 B
Rust
37 lines
634 B
Rust
//@run-rustfix
|
|
|
|
#![allow(unused)]
|
|
#![warn(clippy::manual_next_back)]
|
|
|
|
struct FakeIter(std::ops::Range<i32>);
|
|
|
|
impl FakeIter {
|
|
fn rev(self) -> Self {
|
|
self
|
|
}
|
|
|
|
fn next(&self) {}
|
|
}
|
|
|
|
impl DoubleEndedIterator for FakeIter {
|
|
fn next_back(&mut self) -> Option<Self::Item> {
|
|
self.0.next_back()
|
|
}
|
|
}
|
|
|
|
impl Iterator for FakeIter {
|
|
type Item = i32;
|
|
fn next(&mut self) -> Option<Self::Item> {
|
|
self.0.next()
|
|
}
|
|
}
|
|
|
|
fn main() {
|
|
// should not lint
|
|
FakeIter(0..10).rev().next();
|
|
|
|
// should lint
|
|
let _ = (0..10).rev().next().unwrap();
|
|
let _ = "something".bytes().rev().next();
|
|
}
|