| //@ run-pass |
| fn main() { let _ = g(Some(E::F(K))); } |
| |
| type R = Result<(), ()>; |
| struct K; |
| |
| enum E { |
| F(K), // must not be built-in type |
| #[allow(dead_code)] |
| G(Box<E>, Box<E>), |
| } |
| |
| fn translate(x: R) -> R { x } |
| |
| fn g(mut status: Option<E>) -> R { |
| loop { |
| match status { |
| Some(infix_or_postfix) => match infix_or_postfix { |
| E::F(_op) => { // <- must be captured by value |
| match Ok(()) { |
| Err(err) => return Err(err), |
| Ok(_) => {}, |
| }; |
| } |
| _ => (), |
| }, |
| _ => match translate(Err(())) { |
| Err(err) => return Err(err), |
| Ok(_) => {}, |
| } |
| } |
| status = None; |
| } |
| } |
