mirror of
https://github.com/rust-lang/rust-clippy
synced 2024-09-20 22:51:58 +00:00
46 lines
1.6 KiB
Rust
46 lines
1.6 KiB
Rust
#![allow(unused_mut)]
|
|
|
|
use std::collections::BTreeMap;
|
|
use std::collections::HashMap;
|
|
use std::collections::VecDeque;
|
|
use std::iter::FromIterator;
|
|
|
|
struct GetFalsePositive {
|
|
arr: [u32; 3],
|
|
}
|
|
|
|
impl GetFalsePositive {
|
|
fn get(&self, pos: usize) -> Option<&u32> { self.arr.get(pos) }
|
|
fn get_mut(&mut self, pos: usize) -> Option<&mut u32> { self.arr.get_mut(pos) }
|
|
}
|
|
|
|
fn main() {
|
|
let mut boxed_slice: Box<[u8]> = Box::new([0, 1, 2, 3]);
|
|
let mut some_slice = &mut [0, 1, 2, 3];
|
|
let mut some_vec = vec![0, 1, 2, 3];
|
|
let mut some_vecdeque: VecDeque<_> = some_vec.iter().cloned().collect();
|
|
let mut some_hashmap: HashMap<u8, char> = HashMap::from_iter(vec![(1, 'a'), (2, 'b')]);
|
|
let mut some_btreemap: BTreeMap<u8, char> = BTreeMap::from_iter(vec![(1, 'a'), (2, 'b')]);
|
|
let mut false_positive = GetFalsePositive { arr: [0, 1, 2] };
|
|
|
|
{ // Test `get().unwrap()`
|
|
let _ = boxed_slice.get(1).unwrap();
|
|
let _ = some_slice.get(0).unwrap();
|
|
let _ = some_vec.get(0).unwrap();
|
|
let _ = some_vecdeque.get(0).unwrap();
|
|
let _ = some_hashmap.get(&1).unwrap();
|
|
let _ = some_btreemap.get(&1).unwrap();
|
|
let _ = false_positive.get(0).unwrap();
|
|
}
|
|
|
|
{ // Test `get_mut().unwrap()`
|
|
*boxed_slice.get_mut(0).unwrap() = 1;
|
|
*some_slice.get_mut(0).unwrap() = 1;
|
|
*some_vec.get_mut(0).unwrap() = 1;
|
|
*some_vecdeque.get_mut(0).unwrap() = 1;
|
|
// Check false positives
|
|
*some_hashmap.get_mut(&1).unwrap() = 'b';
|
|
*some_btreemap.get_mut(&1).unwrap() = 'b';
|
|
*false_positive.get_mut(0).unwrap() = 1;
|
|
}
|
|
}
|