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rust-clippy/tests/ui/manual_find_map.rs

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2021-01-14 22:36:36 +00:00
// run-rustfix
#![allow(dead_code)]
#![warn(clippy::manual_find_map)]
#![allow(clippy::redundant_closure)] // FIXME suggestion may have redundant closure
fn main() {
// is_some(), unwrap()
let _ = (0..).find(|n| to_opt(*n).is_some()).map(|a| to_opt(a).unwrap());
// ref pattern, expect()
let _ = (0..).find(|&n| to_opt(n).is_some()).map(|a| to_opt(a).expect("hi"));
// is_ok(), unwrap_or()
let _ = (0..).find(|&n| to_res(n).is_ok()).map(|a| to_res(a).unwrap_or(1));
}
fn no_lint() {
// no shared code
let _ = (0..).filter(|n| *n > 1).map(|n| n + 1);
// very close but different since filter() provides a reference
let _ = (0..).find(|n| to_opt(n).is_some()).map(|a| to_opt(a).unwrap());
// similar but different
let _ = (0..).find(|n| to_opt(n).is_some()).map(|n| to_res(n).unwrap());
let _ = (0..)
.find(|n| to_opt(n).map(|n| n + 1).is_some())
.map(|a| to_opt(a).unwrap());
}
fn to_opt<T>(_: T) -> Option<T> {
unimplemented!()
}
fn to_res<T>(_: T) -> Result<T, ()> {
unimplemented!()
}