1 // Copyright 2014-2018 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution.
4 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
5 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
6 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
7 // option. This file may not be copied, modified, or distributed
8 // except according to those terms.
12 use std::collections::BTreeMap;
13 use std::collections::HashMap;
14 use std::collections::VecDeque;
15 use std::iter::FromIterator;
17 struct GetFalsePositive {
21 impl GetFalsePositive {
22 fn get(&self, pos: usize) -> Option<&u32> {
25 fn get_mut(&mut self, pos: usize) -> Option<&mut u32> {
31 let mut boxed_slice: Box<[u8]> = Box::new([0, 1, 2, 3]);
32 let mut some_slice = &mut [0, 1, 2, 3];
33 let mut some_vec = vec![0, 1, 2, 3];
34 let mut some_vecdeque: VecDeque<_> = some_vec.iter().cloned().collect();
35 let mut some_hashmap: HashMap<u8, char> = HashMap::from_iter(vec![(1, 'a'), (2, 'b')]);
36 let mut some_btreemap: BTreeMap<u8, char> = BTreeMap::from_iter(vec![(1, 'a'), (2, 'b')]);
37 let mut false_positive = GetFalsePositive { arr: [0, 1, 2] };
40 // Test `get().unwrap()`
41 let _ = boxed_slice.get(1).unwrap();
42 let _ = some_slice.get(0).unwrap();
43 let _ = some_vec.get(0).unwrap();
44 let _ = some_vecdeque.get(0).unwrap();
45 let _ = some_hashmap.get(&1).unwrap();
46 let _ = some_btreemap.get(&1).unwrap();
47 let _ = false_positive.get(0).unwrap();
51 // Test `get_mut().unwrap()`
52 *boxed_slice.get_mut(0).unwrap() = 1;
53 *some_slice.get_mut(0).unwrap() = 1;
54 *some_vec.get_mut(0).unwrap() = 1;
55 *some_vecdeque.get_mut(0).unwrap() = 1;
56 // Check false positives
57 *some_hashmap.get_mut(&1).unwrap() = 'b';
58 *some_btreemap.get_mut(&1).unwrap() = 'b';
59 *false_positive.get_mut(0).unwrap() = 1;
63 // Test `get().unwrap().foo()` and `get_mut().unwrap().bar()`
64 let _ = some_vec.get(0..1).unwrap().to_vec();
65 let _ = some_vec.get_mut(0..1).unwrap().to_vec();