| // 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. |
| |
| #![warn(const_err)] |
| |
| #![feature(const_fn)] |
| |
| const fn foo(x: u32) -> u32 { |
| x |
| } |
| |
| fn main() { |
| const X: u32 = 0-1; |
| //~^ WARN this constant cannot be used |
| const Y: u32 = foo(0-1); |
| //~^ WARN this constant cannot be used |
| println!("{} {}", X, Y); |
| //~^ ERROR erroneous constant used |
| //~| ERROR erroneous constant used |
| //~| ERROR E0080 |
| //~| ERROR E0080 |
| } |