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// run-rustfix
#![warn(clippy::all, clippy::pedantic)]
#![allow(clippy::missing_docs_in_private_items)]
#![allow(clippy::map_identity)]
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);
}
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