#![warn(clippy, clippy_pedantic)] #![allow(unused_parens, unused_variables, missing_docs_in_private_items)] fn id<T>(x: T) -> T { x } fn first(x: (isize, isize)) -> isize { x.0 } fn main() { let mut x = 1; let x = &mut x; let x = { x }; let x = (&*x); let x = { *x + 1 }; let x = id(x); let x = (1, x); let x = first(x); let y = 1; let x = y; let x; x = 42; let o = Some(1_u8); if let Some(p) = o { assert_eq!(1, p); } match o { Some(p) => p, // no error, because the p above is in its own scope None => 0, }; match (x, o) { (1, Some(a)) | (a, Some(1)) => (), // no error though `a` appears twice _ => (), } }