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//@ run-pass
#![feature(core_intrinsics, discriminant_kind)]
use std::intrinsics::discriminant_value;
use std::marker::DiscriminantKind;
#[repr(i128)]
enum Signed {
Zero = 0,
Staircase = 0x01_02_03_04_05_06_07_08_09_0a_0b_0c_0d_0e_0f,
U64Limit = u64::MAX as i128 + 1,
SmallNegative = -1,
BigNegative = i128::MIN,
Next,
}
#[repr(u128)]
enum Unsigned {
Zero = 0,
Staircase = 0x01_02_03_04_05_06_07_08_09_0a_0b_0c_0d_0e_0f,
U64Limit = u64::MAX as u128 + 1,
Next,
}
fn discr<T, U>(v: T, value: U)
where
<T as DiscriminantKind>::Discriminant: PartialEq<U>,
{
assert!(discriminant_value(&v) == value);
}
fn main() {
discr(Signed::Zero, 0);
discr(Signed::Staircase, 0x01_02_03_04_05_06_07_08_09_0a_0b_0c_0d_0e_0f);
discr(Signed::U64Limit, u64::MAX as i128 + 1);
discr(Signed::SmallNegative, -1);
discr(Signed::BigNegative, i128::MIN);
discr(Signed::Next, i128::MIN + 1);
discr(Unsigned::Zero, 0);
discr(Unsigned::Staircase, 0x01_02_03_04_05_06_07_08_09_0a_0b_0c_0d_0e_0f);
discr(Unsigned::U64Limit, u64::MAX as u128 + 1);
discr(Unsigned::Next, u64::MAX as u128 + 2);
}
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