| // Copyright 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(core_intrinsics)] |
| |
| use std::intrinsics; |
| |
| // See also src/test/run-make/intrinsic-unreachable. |
| |
| unsafe fn f(x: usize) -> usize { |
| match x { |
| 17 => 23, |
| _ => intrinsics::unreachable(), |
| } |
| } |
| |
| fn main() { |
| assert_eq!(unsafe { f(17) }, 23); |
| } |