| #![deny(clippy::bind_instead_of_map)] | |
| // need a main anyway, use it get rid of unused warnings too | |
| pub fn main() { | |
| let x = Some(5); | |
| // the easiest cases | |
| let _ = x; | |
| //~^ bind_instead_of_map | |
| let _ = x.map(|o| o + 1); | |
| //~^ bind_instead_of_map | |
| // and an easy counter-example | |
| let _ = x.and_then(|o| if o < 32 { Some(o) } else { None }); | |
| // Different type | |
| let x: Result<u32, &str> = Ok(1); | |
| let _ = x; | |
| //~^ bind_instead_of_map | |
| } | |
| pub fn foo() -> Option<String> { | |
| let x = Some(String::from("hello")); | |
| Some("hello".to_owned()).and_then(|s| Some(format!("{}{}", s, x?))) | |
| } | |
| pub fn example2(x: bool) -> Option<&'static str> { | |
| Some("a").and_then(|s| Some(if x { s } else { return None })) | |
| } |