| // Copyright 2012-2014 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. |
| |
| #![feature(box_patterns)] |
| #![feature(box_syntax)] |
| |
| enum IntList { |
| Cons(isize, Box<IntList>), |
| Nil |
| } |
| |
| fn tail(source_list: &IntList) -> IntList { |
| match source_list { |
| &IntList::Cons(val, box ref next_list) => tail(next_list), |
| &IntList::Cons(val, box Nil) => IntList::Cons(val, box Nil), |
| //~^ ERROR unreachable pattern |
| //~^^ WARN pattern binding `Nil` is named the same as one of the variants of the type `IntList` |
| _ => panic!() |
| } |
| } |
| |
| fn main() {} |
