3 #![warn(clippy::manual_split_once)]
4 #![allow(unused, clippy::iter_skip_next, clippy::iter_nth_zero)]
6 extern crate itertools;
8 #[allow(unused_imports)]
9 use itertools::Itertools;
12 let _ = "key=value".splitn(2, '=').nth(2);
13 let _ = "key=value".splitn(2, '=').nth(1).unwrap();
14 let _ = "key=value".splitn(2, '=').skip(1).next().unwrap();
15 let (_, _) = "key=value".splitn(2, '=').next_tuple().unwrap();
17 let s = String::from("key=value");
18 let _ = s.splitn(2, '=').nth(1).unwrap();
20 let s = Box::<str>::from("key=value");
21 let _ = s.splitn(2, '=').nth(1).unwrap();
24 let _ = s.splitn(2, '=').skip(1).next().unwrap();
26 fn _f(s: &str) -> Option<&str> {
27 let _ = s.splitn(2, '=').nth(1)?;
28 let _ = s.splitn(2, '=').skip(1).next()?;
29 let _ = s.rsplitn(2, '=').nth(1)?;
30 let _ = s.rsplitn(2, '=').skip(1).next()?;
34 // Don't lint, slices don't have `split_once`
35 let _ = [0, 1, 2].splitn(2, |&x| x == 1).nth(1).unwrap();
37 // `rsplitn` gives the results in the reverse order of `rsplit_once`
38 let _ = "key=value".rsplitn(2, '=').nth(1).unwrap();
39 let (_, _) = "key=value".rsplitn(2, '=').next_tuple().unwrap();
40 let _ = s.rsplitn(2, '=').nth(1);
43 fn indirect() -> Option<()> {
44 let mut iter = "a.b.c".splitn(2, '.');
45 let l = iter.next().unwrap();
46 let r = iter.next().unwrap();
48 let mut iter = "a.b.c".splitn(2, '.');
52 let mut iter = "a.b.c".rsplitn(2, '.');
53 let r = iter.next().unwrap();
54 let l = iter.next().unwrap();
56 let mut iter = "a.b.c".rsplitn(2, '.');
60 // could lint, currently doesn't
62 let mut iter = "a.b.c".splitn(2, '.');
67 let mut iter = "a.b.c".splitn(2, '.');
68 let mut mut_binding = iter.next()?;
71 let mut iter = "a.b.c".splitn(2, '.');
72 let tuple = (iter.next()?, iter.next()?);
76 let mut missing_unwrap = "a.b.c".splitn(2, '.');
77 let l = missing_unwrap.next();
78 let r = missing_unwrap.next();
80 let mut mixed_unrap = "a.b.c".splitn(2, '.');
81 let unwrap = mixed_unrap.next().unwrap();
82 let question_mark = mixed_unrap.next()?;
84 let mut iter = "a.b.c".splitn(2, '.');
85 let same_name = iter.next()?;
86 let same_name = iter.next()?;
88 let mut iter = "a.b.c".splitn(2, '.');
89 let shadows_existing = "d";
90 let shadows_existing = iter.next()?;
93 let mut iter = "a.b.c".splitn(2, '.');
94 let becomes_shadowed = iter.next()?;
95 let becomes_shadowed = "d";
98 let mut iter = "a.b.c".splitn(2, '.');
100 let r = iter.next()?;
101 let third_usage = iter.next()?;
103 let mut n_three = "a.b.c".splitn(3, '.');
104 let l = n_three.next()?;
105 let r = n_three.next()?;
107 let mut iter = "a.b.c".splitn(2, '.');
109 let in_block = iter.next()?;
111 let r = iter.next()?;
113 let mut lacks_binding = "a.b.c".splitn(2, '.');
114 let _ = lacks_binding.next()?;
115 let r = lacks_binding.next()?;
117 let mut mapped = "a.b.c".splitn(2, '.').map(|_| "~");
118 let l = iter.next()?;
119 let r = iter.next()?;
121 let mut assigned = "";
122 let mut iter = "a.b.c".splitn(2, '.');
123 let l = iter.next()?;
124 assigned = iter.next()?;
129 #[clippy::msrv = "1.51"]
131 // `str::split_once` was stabilized in 1.52. Do not lint this
132 let _ = "key=value".splitn(2, '=').nth(1).unwrap();
134 let mut iter = "a.b.c".splitn(2, '.');
135 let a = iter.next().unwrap();
136 let b = iter.next().unwrap();
139 #[clippy::msrv = "1.52"]
141 let _ = "key=value".splitn(2, '=').nth(1).unwrap();
143 let mut iter = "a.b.c".splitn(2, '.');
144 let a = iter.next().unwrap();
145 let b = iter.next().unwrap();