mirror of
https://github.com/rust-lang/rust-clippy
synced 2024-11-24 13:43:17 +00:00
65 lines
2 KiB
Rust
65 lines
2 KiB
Rust
// run-rustfix
|
|
|
|
#![warn(clippy::all, clippy::pedantic)]
|
|
#![allow(clippy::let_underscore_untyped)]
|
|
#![allow(clippy::missing_docs_in_private_items)]
|
|
#![allow(clippy::map_identity)]
|
|
#![allow(clippy::redundant_closure)]
|
|
#![allow(clippy::unnecessary_wraps)]
|
|
#![feature(result_flattening)]
|
|
|
|
fn main() {
|
|
// mapping to Option on Iterator
|
|
fn option_id(x: i8) -> Option<i8> {
|
|
Some(x)
|
|
}
|
|
let option_id_ref: fn(i8) -> Option<i8> = option_id;
|
|
let option_id_closure = |x| Some(x);
|
|
let _: Vec<_> = vec![5_i8; 6].into_iter().filter_map(option_id).collect();
|
|
let _: Vec<_> = vec![5_i8; 6].into_iter().filter_map(option_id_ref).collect();
|
|
let _: Vec<_> = vec![5_i8; 6].into_iter().filter_map(option_id_closure).collect();
|
|
let _: Vec<_> = vec![5_i8; 6].into_iter().filter_map(|x| x.checked_add(1)).collect();
|
|
|
|
// mapping to Iterator on Iterator
|
|
let _: Vec<_> = vec![5_i8; 6].into_iter().flat_map(|x| 0..x).collect();
|
|
|
|
// mapping to Option on Option
|
|
let _: Option<_> = (Some(Some(1))).and_then(|x| x);
|
|
|
|
// mapping to Result on Result
|
|
let _: Result<_, &str> = (Ok(Ok(1))).and_then(|x| x);
|
|
|
|
issue8734();
|
|
issue8878();
|
|
}
|
|
|
|
fn issue8734() {
|
|
let _ = [0u8, 1, 2, 3]
|
|
.into_iter()
|
|
.flat_map(|n| match n {
|
|
1 => [n
|
|
.saturating_add(1)
|
|
.saturating_add(1)
|
|
.saturating_add(1)
|
|
.saturating_add(1)
|
|
.saturating_add(1)
|
|
.saturating_add(1)
|
|
.saturating_add(1)
|
|
.saturating_add(1)],
|
|
n => [n],
|
|
});
|
|
}
|
|
|
|
#[allow(clippy::bind_instead_of_map)] // map + flatten will be suggested to `and_then`, but afterwards `map` is suggested again
|
|
#[rustfmt::skip] // whitespace is important for this one
|
|
fn issue8878() {
|
|
std::collections::HashMap::<u32, u32>::new()
|
|
.get(&0)
|
|
.and_then(|_| {
|
|
// we need some newlines
|
|
// so that the span is big enough
|
|
// for a split output of the diagnostic
|
|
Some("")
|
|
// whitespace beforehand is important as well
|
|
});
|
|
}
|