// run-rustfix // aux-build:option_helpers.rs #![warn(clippy::map_unwrap_or)] #[macro_use] extern crate option_helpers; use std::collections::HashMap; #[rustfmt::skip] fn option_methods() { let opt = Some(1); // Check for `option.map(_).unwrap_or_else(_)` use. // single line case let _ = opt.map(|x| x + 1) // Should lint even though this call is on a separate line. .unwrap_or_else(|| 0); // Macro case. // Should not lint. let _ = opt_map!(opt, |x| x + 1).unwrap_or_else(|| 0); // Issue #4144 { let mut frequencies = HashMap::new(); let word = "foo"; frequencies .get_mut(word) .map(|count| { *count += 1; }) .unwrap_or_else(|| { frequencies.insert(word.to_owned(), 1); }); } } #[rustfmt::skip] fn result_methods() { let res: Result<i32, ()> = Ok(1); // Check for `result.map(_).unwrap_or_else(_)` use. // single line case let _ = res.map(|x| x + 1) // should lint even though this call is on a separate line .unwrap_or_else(|_e| 0); // macro case let _ = opt_map!(res, |x| x + 1).unwrap_or_else(|_e| 0); // should not lint } fn main() { option_methods(); result_methods(); }