| #![warn(clippy::comparison_to_empty)] |
| #![allow(clippy::borrow_deref_ref, clippy::needless_if, clippy::useless_vec)] |
| #![feature(let_chains)] |
| |
| fn main() { |
| // Disallow comparisons to empty |
| let s = String::new(); |
| let _ = s.is_empty(); |
| let _ = !s.is_empty(); |
| |
| let v = vec![0]; |
| let _ = v.is_empty(); |
| let _ = !v.is_empty(); |
| if (*v).is_empty() {} |
| let s = [0].as_slice(); |
| if s.is_empty() {} |
| if s.is_empty() {} |
| if s.is_empty() |
| && s.is_empty() |
| {} |
| |
| // Allow comparisons to non-empty |
| let s = String::new(); |
| let _ = s == " "; |
| let _ = s != " "; |
| |
| let v = vec![0]; |
| let _ = v == [0]; |
| let _ = v != [0]; |
| if let [0] = &*v {} |
| let s = [0].as_slice(); |
| if let [0] = s {} |
| if let [0] = &*s |
| && s == [0] |
| {} |
| } |