rust/tests/ui/feature-gates/feature-gate-negate-unsigned.rs
2023-01-11 09:32:08 +00:00

19 lines
401 B
Rust

// Test that negating unsigned integers doesn't compile
struct S;
impl std::ops::Neg for S {
type Output = u32;
fn neg(self) -> u32 { 0 }
}
fn main() {
let _max: usize = -1;
//~^ ERROR cannot apply unary operator `-` to type `usize`
let x = 5u8;
let _y = -x;
//~^ ERROR cannot apply unary operator `-` to type `u8`
-S; // should not trigger the gate; issue 26840
}