| // Copyright 2017 The Rust Project Developers. See the COPYRIGHT |
| // file at the top-level directory of this distribution and at |
| // http://rust-lang.org/COPYRIGHT. |
| // |
| // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or |
| // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| |
| // 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; |
| } |
| } |
