68 lines
2.2 KiB
Rust
68 lines
2.2 KiB
Rust
// Copyright 2014-2018 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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#![allow(unused_mut)]
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use std::collections::BTreeMap;
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use std::collections::HashMap;
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use std::collections::VecDeque;
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use std::iter::FromIterator;
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struct GetFalsePositive {
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arr: [u32; 3],
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}
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impl GetFalsePositive {
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fn get(&self, pos: usize) -> Option<&u32> {
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self.arr.get(pos)
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}
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fn get_mut(&mut self, pos: usize) -> Option<&mut u32> {
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self.arr.get_mut(pos)
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}
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}
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fn main() {
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let mut boxed_slice: Box<[u8]> = Box::new([0, 1, 2, 3]);
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let mut some_slice = &mut [0, 1, 2, 3];
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let mut some_vec = vec![0, 1, 2, 3];
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let mut some_vecdeque: VecDeque<_> = some_vec.iter().cloned().collect();
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let mut some_hashmap: HashMap<u8, char> = HashMap::from_iter(vec![(1, 'a'), (2, 'b')]);
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let mut some_btreemap: BTreeMap<u8, char> = BTreeMap::from_iter(vec![(1, 'a'), (2, 'b')]);
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let mut false_positive = GetFalsePositive { arr: [0, 1, 2] };
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{
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// Test `get().unwrap()`
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let _ = boxed_slice.get(1).unwrap();
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let _ = some_slice.get(0).unwrap();
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let _ = some_vec.get(0).unwrap();
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let _ = some_vecdeque.get(0).unwrap();
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let _ = some_hashmap.get(&1).unwrap();
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let _ = some_btreemap.get(&1).unwrap();
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let _ = false_positive.get(0).unwrap();
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}
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{
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// Test `get_mut().unwrap()`
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*boxed_slice.get_mut(0).unwrap() = 1;
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*some_slice.get_mut(0).unwrap() = 1;
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*some_vec.get_mut(0).unwrap() = 1;
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*some_vecdeque.get_mut(0).unwrap() = 1;
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// Check false positives
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*some_hashmap.get_mut(&1).unwrap() = 'b';
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*some_btreemap.get_mut(&1).unwrap() = 'b';
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*false_positive.get_mut(0).unwrap() = 1;
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}
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{
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// Test `get().unwrap().foo()` and `get_mut().unwrap().bar()`
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let _ = some_vec.get(0..1).unwrap().to_vec();
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let _ = some_vec.get_mut(0..1).unwrap().to_vec();
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}
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}
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