mirror of
https://github.com/rust-lang/rust.git
synced 2024-11-24 07:44:10 +00:00
28 lines
663 B
Rust
28 lines
663 B
Rust
//@ run-pass
|
|
#![allow(non_upper_case_globals)]
|
|
|
|
// Tests the range assertion wraparound case when reading discriminants.
|
|
|
|
#[repr(u8)]
|
|
#[derive(Copy, Clone)]
|
|
enum Eu { Lu = 0, Hu = 255 }
|
|
|
|
static CLu: Eu = Eu::Lu;
|
|
static CHu: Eu = Eu::Hu;
|
|
|
|
#[repr(i8)]
|
|
#[derive(Copy, Clone)]
|
|
enum Es { Ls = -128, Hs = 127 }
|
|
|
|
static CLs: Es = Es::Ls;
|
|
static CHs: Es = Es::Hs;
|
|
|
|
pub fn main() {
|
|
assert_eq!((Eu::Hu as u8).wrapping_add(1), Eu::Lu as u8);
|
|
assert_eq!((Es::Hs as i8).wrapping_add(1), Es::Ls as i8);
|
|
assert_eq!(CLu as u8, Eu::Lu as u8);
|
|
assert_eq!(CHu as u8, Eu::Hu as u8);
|
|
assert_eq!(CLs as i8, Es::Ls as i8);
|
|
assert_eq!(CHs as i8, Es::Hs as i8);
|
|
}
|