| // Copyright 2015 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. |
| |
| // Test that negating unsigned integers doesn't compile |
| |
| struct S; |
| impl std::ops::Neg for S { |
| type Output = u32; |
| fn neg(self) -> u32 { 0 } |
| } |
| |
| // FIXME(eddyb) move this back to a `-1` literal when |
| // MIR building stops eagerly erroring in that case. |
| const _MAX: usize = -(2 - 1); |
| //~^ WARN unary negation of unsigned integer |
| //~| ERROR unary negation of unsigned integer |
| //~| HELP use a cast or the `!` operator |
| |
| fn main() { |
| let x = 5u8; |
| let _y = -x; //~ ERROR unary negation of unsigned integer |
| //~^ HELP use a cast or the `!` operator |
| -S; // should not trigger the gate; issue 26840 |
| } |
