1// run-rustfix
2
3#![allow(unused_imports, clippy::redundant_clone)]
4#![warn(clippy::option_as_ref_deref)]
5
6use std::ffi::{CString, OsString};
7use std::ops::{Deref, DerefMut};
8use std::path::PathBuf;
9
10fn main() {
11    let mut opt = Some(String::from("123"));
12
13    let _ = opt.clone().as_deref().map(str::len);
14
15    #[rustfmt::skip]
16    let _ = opt.clone().as_deref()
17        .map(str::len);
18
19    let _ = opt.as_deref_mut();
20
21    let _ = opt.as_deref();
22    let _ = opt.as_deref();
23    let _ = opt.as_deref_mut();
24    let _ = opt.as_deref_mut();
25    let _ = Some(CString::new(vec![]).unwrap()).as_deref();
26    let _ = Some(OsString::new()).as_deref();
27    let _ = Some(PathBuf::new()).as_deref();
28    let _ = Some(Vec::<()>::new()).as_deref();
29    let _ = Some(Vec::<()>::new()).as_deref_mut();
30
31    let _ = opt.as_deref();
32    let _ = opt.clone().as_deref_mut().map(|x| x.len());
33
34    let vc = vec![String::new()];
35    let _ = Some(1_usize).as_ref().map(|x| vc[*x].as_str()); // should not be linted
36
37    let _: Option<&str> = Some(&String::new()).as_ref().map(|x| x.as_str()); // should not be linted
38
39    let _ = opt.as_deref();
40    let _ = opt.as_deref_mut();
41
42    // Issue #5927
43    let _ = opt.as_deref();
44}
45