#![deny(clippy::bind_instead_of_map)] #![allow(clippy::blocks_in_conditions)] pub fn main() { let _ = Some("42").map(|s| if s.len() < 42 { 0 } else { s.len() }); let _ = Some("42").and_then(|s| if s.len() < 42 { None } else { Some(s.len()) }); let _ = Ok::<_, ()>("42").map(|s| if s.len() < 42 { 0 } else { s.len() }); let _ = Ok::<_, ()>("42").and_then(|s| if s.len() < 42 { Err(()) } else { Ok(s.len()) }); let _ = Err::<(), _>("42").map_err(|s| if s.len() < 42 { s.len() + 20 } else { s.len() }); let _ = Err::<(), _>("42").or_else(|s| if s.len() < 42 { Ok(()) } else { Err(s.len()) }); hard_example(); macro_example(); } fn hard_example() { Some("42").map(|s| { if { if s == "43" { return 43; } s == "42" } { return 45; } match s.len() { 10 => 2, 20 => { if foo() { return { if foo() { return 20; } println!("foo"); 3 }; } 20 }, 40 => 30, _ => 1, } }); } fn foo() -> bool { true } macro_rules! m { () => { Some(10) }; } fn macro_example() { let _ = Some("").and_then(|s| if s.len() == 20 { m!() } else { Some(20) }); let _ = Some("").map(|s| if s.len() == 20 { m!() } else { Some(20) }); }