mirror of
https://github.com/rust-lang/rust-clippy
synced 2024-11-14 00:47:16 +00:00
24 lines
895 B
Rust
24 lines
895 B
Rust
#![warn(clippy::result_map_or_into_option)]
|
|
|
|
fn main() {
|
|
let opt: Result<u32, &str> = Ok(1);
|
|
let _ = opt.map_or(None, Some);
|
|
//~^ ERROR: called `map_or(None, Some)` on a `Result` value
|
|
let _ = opt.map_or_else(|_| None, Some);
|
|
//~^ ERROR: called `map_or_else(|_| None, Some)` on a `Result` value
|
|
#[rustfmt::skip]
|
|
let _ = opt.map_or_else(|_| { None }, Some);
|
|
//~^ ERROR: called `map_or_else(|_| None, Some)` on a `Result` value
|
|
|
|
let rewrap = |s: u32| -> Option<u32> { Some(s) };
|
|
|
|
// A non-Some `f` arg should not emit the lint
|
|
let opt: Result<u32, &str> = Ok(1);
|
|
let _ = opt.map_or(None, rewrap);
|
|
|
|
// A non-Some `f` closure where the argument is not used as the
|
|
// return should not emit the lint
|
|
let opt: Result<u32, &str> = Ok(1);
|
|
_ = opt.map_or(None, |_x| Some(1));
|
|
let _ = opt.map_or_else(|a| a.parse::<u32>().ok(), Some);
|
|
}
|