| // run-pass |
| #![feature(core_intrinsics, repr128)] |
| //~^ WARN the feature `repr128` is incomplete |
| |
| use std::intrinsics::discriminant_value; |
| |
| enum E1 { |
| A, |
| B, |
| } |
| |
| #[repr(i8)] |
| enum E2 { |
| A = 7, |
| B = -2, |
| } |
| |
| #[repr(C)] |
| enum E3 { |
| A = 42, |
| B = 100, |
| } |
| |
| #[repr(i128)] |
| enum E4 { |
| A = 0x1223_3445_5667_7889, |
| B = -0x1223_3445_5667_7889, |
| } |
| |
| fn main() { |
| let mut target: [isize; 3] = [0, 0, 0]; |
| target[1] = discriminant_value(&E1::A); |
| assert_eq!(target, [0, 0, 0]); |
| target[1] = discriminant_value(&E1::B); |
| assert_eq!(target, [0, 1, 0]); |
| |
| let mut target: [i8; 3] = [0, 0, 0]; |
| target[1] = discriminant_value(&E2::A); |
| assert_eq!(target, [0, 7, 0]); |
| target[1] = discriminant_value(&E2::B); |
| assert_eq!(target, [0, -2, 0]); |
| |
| let mut target: [isize; 3] = [0, 0, 0]; |
| target[1] = discriminant_value(&E3::A); |
| assert_eq!(target, [0, 42, 0]); |
| target[1] = discriminant_value(&E3::B); |
| assert_eq!(target, [0, 100, 0]); |
| |
| let mut target: [i128; 3] = [0, 0, 0]; |
| target[1] = discriminant_value(&E4::A); |
| assert_eq!(target, [0, 0x1223_3445_5667_7889, 0]); |
| target[1] = discriminant_value(&E4::B); |
| assert_eq!(target, [0, -0x1223_3445_5667_7889, 0]); |
| } |