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// run-pass
#![allow(stable_features)]
#![feature(arbitrary_enum_discriminant, core, core_intrinsics)]
extern crate core;
use core::intrinsics::discriminant_value;
enum CLike1 {
A,
B,
C,
D
}
enum CLike2 {
A = 5,
B = 2,
C = 19,
D
}
#[repr(i8)]
enum CLike3 {
A = 5,
B,
C = -1,
D
}
#[allow(unused_tuple_struct_fields)]
enum ADT {
First(u32, u32),
Second(u64)
}
enum NullablePointer {
Something(#[allow(unused_tuple_struct_fields)] &'static u32),
Nothing
}
static CONST : u32 = 0xBEEF;
#[allow(dead_code)]
#[repr(isize)]
enum Mixed {
Unit = 3,
Tuple(u16) = 2,
Struct {
a: u8,
b: u16,
} = 1,
}
pub fn main() {
assert_eq!(discriminant_value(&CLike1::A), 0isize);
assert_eq!(discriminant_value(&CLike1::B), 1);
assert_eq!(discriminant_value(&CLike1::C), 2);
assert_eq!(discriminant_value(&CLike1::D), 3);
assert_eq!(discriminant_value(&CLike2::A), 5isize);
assert_eq!(discriminant_value(&CLike2::B), 2);
assert_eq!(discriminant_value(&CLike2::C), 19);
assert_eq!(discriminant_value(&CLike2::D), 20);
assert_eq!(discriminant_value(&CLike3::A), 5i8);
assert_eq!(discriminant_value(&CLike3::B), 6);
assert_eq!(discriminant_value(&CLike3::C), -1);
assert_eq!(discriminant_value(&CLike3::D), 0);
assert_eq!(discriminant_value(&ADT::First(0,0)), 0isize);
assert_eq!(discriminant_value(&ADT::Second(5)), 1);
assert_eq!(discriminant_value(&NullablePointer::Nothing), 1isize);
assert_eq!(discriminant_value(&NullablePointer::Something(&CONST)), 0);
assert_eq!(discriminant_value(&10), 0u8);
assert_eq!(discriminant_value(&"test"), 0u8);
assert_eq!(discriminant_value(&Mixed::Unit), 3isize);
assert_eq!(discriminant_value(&Mixed::Tuple(5)), 2);
assert_eq!(discriminant_value(&Mixed::Struct{a: 7, b: 11}), 1);
}
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