rust-clippy/tests/ui/manual_split_once.rs

56 lines
1.8 KiB
Rust

// run-rustfix
#![feature(custom_inner_attributes)]
#![warn(clippy::manual_split_once)]
#![allow(clippy::iter_skip_next, clippy::iter_nth_zero)]
extern crate itertools;
#[allow(unused_imports)]
use itertools::Itertools;
fn main() {
let _ = "key=value".splitn(2, '=').next();
let _ = "key=value".splitn(2, '=').nth(2);
let _ = "key=value".splitn(2, '=').next().unwrap();
let _ = "key=value".splitn(2, '=').nth(0).unwrap();
let _ = "key=value".splitn(2, '=').nth(1).unwrap();
let _ = "key=value".splitn(2, '=').skip(1).next().unwrap();
let (_, _) = "key=value".splitn(2, '=').next_tuple().unwrap();
let s = String::from("key=value");
let _ = s.splitn(2, '=').next().unwrap();
let s = Box::<str>::from("key=value");
let _ = s.splitn(2, '=').nth(0).unwrap();
let s = &"key=value";
let _ = s.splitn(2, '=').skip(0).next().unwrap();
fn _f(s: &str) -> Option<&str> {
let _ = s.splitn(2, "key=value").next()?;
let _ = s.splitn(2, "key=value").nth(1)?;
let _ = s.splitn(2, "key=value").skip(1).next()?;
None
}
// Don't lint, slices don't have `split_once`
let _ = [0, 1, 2].splitn(2, |&x| x == 1).nth(1).unwrap();
// `rsplitn` gives the results in the reverse order of `rsplit_once`
let _ = "key=value".rsplitn(2, '=').next().unwrap();
let _ = "key=value".rsplitn(2, '=').nth(1).unwrap();
let _ = "key=value".rsplitn(2, '=').nth(0);
let (_, _) = "key=value".rsplitn(2, '=').next_tuple().unwrap();
}
fn _msrv_1_51() {
#![clippy::msrv = "1.51"]
// `str::split_once` was stabilized in 1.16. Do not lint this
let _ = "key=value".splitn(2, '=').nth(1).unwrap();
}
fn _msrv_1_52() {
#![clippy::msrv = "1.52"]
let _ = "key=value".splitn(2, '=').nth(1).unwrap();
}